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/*
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* Copyright 1996-2006 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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/*
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* (C) Copyright Taligent, Inc. 1996, 1997 - All Rights Reserved
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* (C) Copyright IBM Corp. 1996 - 1998 - All Rights Reserved
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*
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* The original version of this source code and documentation is copyrighted
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* and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These
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* materials are provided under terms of a License Agreement between Taligent
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* and Sun. This technology is protected by multiple US and International
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* patents. This notice and attribution to Taligent may not be removed.
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* Taligent is a registered trademark of Taligent, Inc.
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*
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*/
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package java.text;
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import java.io.InvalidObjectException;
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import java.io.IOException;
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import java.io.ObjectInputStream;
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import java.text.DecimalFormat;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Date;
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import java.util.List;
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import java.util.Locale;
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/**
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* <code>MessageFormat</code> provides a means to produce concatenated
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* messages in a language-neutral way. Use this to construct messages
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* displayed for end users.
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*
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* <p>
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* <code>MessageFormat</code> takes a set of objects, formats them, then
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* inserts the formatted strings into the pattern at the appropriate places.
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*
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* <p>
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* <strong>Note:</strong>
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* <code>MessageFormat</code> differs from the other <code>Format</code>
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* classes in that you create a <code>MessageFormat</code> object with one
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* of its constructors (not with a <code>getInstance</code> style factory
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* method). The factory methods aren't necessary because <code>MessageFormat</code>
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* itself doesn't implement locale specific behavior. Any locale specific
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* behavior is defined by the pattern that you provide as well as the
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* subformats used for inserted arguments.
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*
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* <h4><a name="patterns">Patterns and Their Interpretation</a></h4>
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*
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* <code>MessageFormat</code> uses patterns of the following form:
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* <blockquote><pre>
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* <i>MessageFormatPattern:</i>
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* <i>String</i>
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* <i>MessageFormatPattern</i> <i>FormatElement</i> <i>String</i>
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*
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* <i>FormatElement:</i>
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* { <i>ArgumentIndex</i> }
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* { <i>ArgumentIndex</i> , <i>FormatType</i> }
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* { <i>ArgumentIndex</i> , <i>FormatType</i> , <i>FormatStyle</i> }
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*
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* <i>FormatType: one of </i>
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* number date time choice
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*
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* <i>FormatStyle:</i>
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* short
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* medium
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* long
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* full
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* integer
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* currency
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* percent
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* <i>SubformatPattern</i>
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*
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* <i>String:</i>
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* <i>StringPart<sub>opt</sub></i>
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* <i>String</i> <i>StringPart</i>
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*
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* <i>StringPart:</i>
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* ''
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* ' <i>QuotedString</i> '
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* <i>UnquotedString</i>
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*
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* <i>SubformatPattern:</i>
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* <i>SubformatPatternPart<sub>opt</sub></i>
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* <i>SubformatPattern</i> <i>SubformatPatternPart</i>
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*
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* <i>SubFormatPatternPart:</i>
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* ' <i>QuotedPattern</i> '
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* <i>UnquotedPattern</i>
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* </pre></blockquote>
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*
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* <p>
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* Within a <i>String</i>, <code>"''"</code> represents a single
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* quote. A <i>QuotedString</i> can contain arbitrary characters
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* except single quotes; the surrounding single quotes are removed.
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* An <i>UnquotedString</i> can contain arbitrary characters
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* except single quotes and left curly brackets. Thus, a string that
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* should result in the formatted message "'{0}'" can be written as
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* <code>"'''{'0}''"</code> or <code>"'''{0}'''"</code>.
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* <p>
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* Within a <i>SubformatPattern</i>, different rules apply.
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* A <i>QuotedPattern</i> can contain arbitrary characters
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* except single quotes; but the surrounding single quotes are
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* <strong>not</strong> removed, so they may be interpreted by the
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* subformat. For example, <code>"{1,number,$'#',##}"</code> will
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* produce a number format with the pound-sign quoted, with a result
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* such as: "$#31,45".
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* An <i>UnquotedPattern</i> can contain arbitrary characters
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* except single quotes, but curly braces within it must be balanced.
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* For example, <code>"ab {0} de"</code> and <code>"ab '}' de"</code>
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* are valid subformat patterns, but <code>"ab {0'}' de"</code> and
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* <code>"ab } de"</code> are not.
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* <p>
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* <dl><dt><b>Warning:</b><dd>The rules for using quotes within message
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* format patterns unfortunately have shown to be somewhat confusing.
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* In particular, it isn't always obvious to localizers whether single
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* quotes need to be doubled or not. Make sure to inform localizers about
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* the rules, and tell them (for example, by using comments in resource
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* bundle source files) which strings will be processed by MessageFormat.
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* Note that localizers may need to use single quotes in translated
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* strings where the original version doesn't have them.
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* </dl>
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* <p>
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* The <i>ArgumentIndex</i> value is a non-negative integer written
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* using the digits '0' through '9', and represents an index into the
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* <code>arguments</code> array passed to the <code>format</code> methods
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* or the result array returned by the <code>parse</code> methods.
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* <p>
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* The <i>FormatType</i> and <i>FormatStyle</i> values are used to create
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* a <code>Format</code> instance for the format element. The following
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* table shows how the values map to Format instances. Combinations not
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* shown in the table are illegal. A <i>SubformatPattern</i> must
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* be a valid pattern string for the Format subclass used.
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* <p>
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* <table border=1 summary="Shows how FormatType and FormatStyle values map to Format instances">
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* <tr>
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* <th id="ft">Format Type
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* <th id="fs">Format Style
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* <th id="sc">Subformat Created
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* <tr>
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* <td headers="ft"><i>(none)</i>
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* <td headers="fs"><i>(none)</i>
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* <td headers="sc"><code>null</code>
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* <tr>
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* <td headers="ft" rowspan=5><code>number</code>
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* <td headers="fs"><i>(none)</i>
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* <td headers="sc"><code>NumberFormat.getInstance(getLocale())</code>
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* <tr>
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* <td headers="fs"><code>integer</code>
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* <td headers="sc"><code>NumberFormat.getIntegerInstance(getLocale())</code>
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* <tr>
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* <td headers="fs"><code>currency</code>
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* <td headers="sc"><code>NumberFormat.getCurrencyInstance(getLocale())</code>
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* <tr>
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* <td headers="fs"><code>percent</code>
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* <td headers="sc"><code>NumberFormat.getPercentInstance(getLocale())</code>
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* <tr>
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* <td headers="fs"><i>SubformatPattern</i>
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* <td headers="sc"><code>new DecimalFormat(subformatPattern, DecimalFormatSymbols.getInstance(getLocale()))</code>
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* <tr>
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* <td headers="ft" rowspan=6><code>date</code>
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* <td headers="fs"><i>(none)</i>
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* <td headers="sc"><code>DateFormat.getDateInstance(DateFormat.DEFAULT, getLocale())</code>
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* <tr>
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* <td headers="fs"><code>short</code>
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* <td headers="sc"><code>DateFormat.getDateInstance(DateFormat.SHORT, getLocale())</code>
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* <tr>
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* <td headers="fs"><code>medium</code>
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* <td headers="sc"><code>DateFormat.getDateInstance(DateFormat.DEFAULT, getLocale())</code>
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* <tr>
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* <td headers="fs"><code>long</code>
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* <td headers="sc"><code>DateFormat.getDateInstance(DateFormat.LONG, getLocale())</code>
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* <tr>
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* <td headers="fs"><code>full</code>
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* <td headers="sc"><code>DateFormat.getDateInstance(DateFormat.FULL, getLocale())</code>
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* <tr>
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* <td headers="fs"><i>SubformatPattern</i>
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* <td headers="sc"><code>new SimpleDateFormat(subformatPattern, getLocale())</code>
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* <tr>
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* <td headers="ft" rowspan=6><code>time</code>
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* <td headers="fs"><i>(none)</i>
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* <td headers="sc"><code>DateFormat.getTimeInstance(DateFormat.DEFAULT, getLocale())</code>
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* <tr>
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* <td headers="fs"><code>short</code>
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* <td headers="sc"><code>DateFormat.getTimeInstance(DateFormat.SHORT, getLocale())</code>
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* <tr>
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* <td headers="fs"><code>medium</code>
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* <td headers="sc"><code>DateFormat.getTimeInstance(DateFormat.DEFAULT, getLocale())</code>
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* <tr>
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* <td headers="fs"><code>long</code>
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* <td headers="sc"><code>DateFormat.getTimeInstance(DateFormat.LONG, getLocale())</code>
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* <tr>
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* <td headers="fs"><code>full</code>
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* <td headers="sc"><code>DateFormat.getTimeInstance(DateFormat.FULL, getLocale())</code>
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* <tr>
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* <td headers="fs"><i>SubformatPattern</i>
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* <td headers="sc"><code>new SimpleDateFormat(subformatPattern, getLocale())</code>
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* <tr>
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* <td headers="ft"><code>choice</code>
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* <td headers="fs"><i>SubformatPattern</i>
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* <td headers="sc"><code>new ChoiceFormat(subformatPattern)</code>
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* </table>
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* <p>
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*
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* <h4>Usage Information</h4>
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*
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* <p>
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* Here are some examples of usage.
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* In real internationalized programs, the message format pattern and other
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* static strings will, of course, be obtained from resource bundles.
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* Other parameters will be dynamically determined at runtime.
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* <p>
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* The first example uses the static method <code>MessageFormat.format</code>,
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* which internally creates a <code>MessageFormat</code> for one-time use:
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* <blockquote><pre>
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* int planet = 7;
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* String event = "a disturbance in the Force";
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*
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* String result = MessageFormat.format(
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* "At {1,time} on {1,date}, there was {2} on planet {0,number,integer}.",
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* planet, new Date(), event);
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* </pre></blockquote>
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* The output is:
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* <blockquote><pre>
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* At 12:30 PM on Jul 3, 2053, there was a disturbance in the Force on planet 7.
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* </pre></blockquote>
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*
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* <p>
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* The following example creates a <code>MessageFormat</code> instance that
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* can be used repeatedly:
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* <blockquote><pre>
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* int fileCount = 1273;
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* String diskName = "MyDisk";
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* Object[] testArgs = {new Long(fileCount), diskName};
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*
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* MessageFormat form = new MessageFormat(
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* "The disk \"{1}\" contains {0} file(s).");
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*
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* System.out.println(form.format(testArgs));
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* </pre></blockquote>
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* The output with different values for <code>fileCount</code>:
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* <blockquote><pre>
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* The disk "MyDisk" contains 0 file(s).
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* The disk "MyDisk" contains 1 file(s).
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* The disk "MyDisk" contains 1,273 file(s).
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* </pre></blockquote>
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*
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* <p>
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* For more sophisticated patterns, you can use a <code>ChoiceFormat</code>
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* to produce correct forms for singular and plural:
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* <blockquote><pre>
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* MessageFormat form = new MessageFormat("The disk \"{1}\" contains {0}.");
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* double[] filelimits = {0,1,2};
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* String[] filepart = {"no files","one file","{0,number} files"};
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* ChoiceFormat fileform = new ChoiceFormat(filelimits, filepart);
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* form.setFormatByArgumentIndex(0, fileform);
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*
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* int fileCount = 1273;
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* String diskName = "MyDisk";
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* Object[] testArgs = {new Long(fileCount), diskName};
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*
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* System.out.println(form.format(testArgs));
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* </pre></blockquote>
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* The output with different values for <code>fileCount</code>:
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* <blockquote><pre>
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* The disk "MyDisk" contains no files.
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* The disk "MyDisk" contains one file.
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* The disk "MyDisk" contains 1,273 files.
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* </pre></blockquote>
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*
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* <p>
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* You can create the <code>ChoiceFormat</code> programmatically, as in the
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* above example, or by using a pattern. See {@link ChoiceFormat}
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* for more information.
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* <blockquote><pre>
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* form.applyPattern(
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* "There {0,choice,0#are no files|1#is one file|1<are {0,number,integer} files}.");
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* </pre></blockquote>
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*
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* <p>
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* <strong>Note:</strong> As we see above, the string produced
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* by a <code>ChoiceFormat</code> in <code>MessageFormat</code> is treated as special;
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* occurrences of '{' are used to indicate subformats, and cause recursion.
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* If you create both a <code>MessageFormat</code> and <code>ChoiceFormat</code>
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* programmatically (instead of using the string patterns), then be careful not to
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* produce a format that recurses on itself, which will cause an infinite loop.
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* <p>
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* When a single argument is parsed more than once in the string, the last match
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* will be the final result of the parsing. For example,
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* <blockquote><pre>
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* MessageFormat mf = new MessageFormat("{0,number,#.##}, {0,number,#.#}");
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* Object[] objs = {new Double(3.1415)};
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* String result = mf.format( objs );
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* // result now equals "3.14, 3.1"
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* objs = null;
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* objs = mf.parse(result, new ParsePosition(0));
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* // objs now equals {new Double(3.1)}
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* </pre></blockquote>
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*
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* <p>
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* Likewise, parsing with a MessageFormat object using patterns containing
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* multiple occurrences of the same argument would return the last match. For
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* example,
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* <blockquote><pre>
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* MessageFormat mf = new MessageFormat("{0}, {0}, {0}");
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* String forParsing = "x, y, z";
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* Object[] objs = mf.parse(forParsing, new ParsePosition(0));
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* // result now equals {new String("z")}
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* </pre></blockquote>
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*
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* <h4><a name="synchronization">Synchronization</a></h4>
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*
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* <p>
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* Message formats are not synchronized.
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* It is recommended to create separate format instances for each thread.
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* If multiple threads access a format concurrently, it must be synchronized
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* externally.
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*
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* @see java.util.Locale
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* @see Format
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* @see NumberFormat
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* @see DecimalFormat
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* @see ChoiceFormat
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* @author Mark Davis
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*/
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public class MessageFormat extends Format {
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private static final long serialVersionUID = 6479157306784022952L;
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/**
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* Constructs a MessageFormat for the default locale and the
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* specified pattern.
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* The constructor first sets the locale, then parses the pattern and
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* creates a list of subformats for the format elements contained in it.
|
|
359 |
* Patterns and their interpretation are specified in the
|
|
360 |
* <a href="#patterns">class description</a>.
|
|
361 |
*
|
|
362 |
* @param pattern the pattern for this message format
|
|
363 |
* @exception IllegalArgumentException if the pattern is invalid
|
|
364 |
*/
|
|
365 |
public MessageFormat(String pattern) {
|
|
366 |
this.locale = Locale.getDefault();
|
|
367 |
applyPattern(pattern);
|
|
368 |
}
|
|
369 |
|
|
370 |
/**
|
|
371 |
* Constructs a MessageFormat for the specified locale and
|
|
372 |
* pattern.
|
|
373 |
* The constructor first sets the locale, then parses the pattern and
|
|
374 |
* creates a list of subformats for the format elements contained in it.
|
|
375 |
* Patterns and their interpretation are specified in the
|
|
376 |
* <a href="#patterns">class description</a>.
|
|
377 |
*
|
|
378 |
* @param pattern the pattern for this message format
|
|
379 |
* @param locale the locale for this message format
|
|
380 |
* @exception IllegalArgumentException if the pattern is invalid
|
|
381 |
* @since 1.4
|
|
382 |
*/
|
|
383 |
public MessageFormat(String pattern, Locale locale) {
|
|
384 |
this.locale = locale;
|
|
385 |
applyPattern(pattern);
|
|
386 |
}
|
|
387 |
|
|
388 |
/**
|
|
389 |
* Sets the locale to be used when creating or comparing subformats.
|
|
390 |
* This affects subsequent calls
|
|
391 |
* <ul>
|
|
392 |
* <li>to the {@link #applyPattern applyPattern}
|
|
393 |
* and {@link #toPattern toPattern} methods if format elements specify
|
|
394 |
* a format type and therefore have the subformats created in the
|
|
395 |
* <code>applyPattern</code> method, as well as
|
|
396 |
* <li>to the <code>format</code> and
|
|
397 |
* {@link #formatToCharacterIterator formatToCharacterIterator} methods
|
|
398 |
* if format elements do not specify a format type and therefore have
|
|
399 |
* the subformats created in the formatting methods.
|
|
400 |
* </ul>
|
|
401 |
* Subformats that have already been created are not affected.
|
|
402 |
*
|
|
403 |
* @param locale the locale to be used when creating or comparing subformats
|
|
404 |
*/
|
|
405 |
public void setLocale(Locale locale) {
|
|
406 |
this.locale = locale;
|
|
407 |
}
|
|
408 |
|
|
409 |
/**
|
|
410 |
* Gets the locale that's used when creating or comparing subformats.
|
|
411 |
*
|
|
412 |
* @return the locale used when creating or comparing subformats
|
|
413 |
*/
|
|
414 |
public Locale getLocale() {
|
|
415 |
return locale;
|
|
416 |
}
|
|
417 |
|
|
418 |
|
|
419 |
/**
|
|
420 |
* Sets the pattern used by this message format.
|
|
421 |
* The method parses the pattern and creates a list of subformats
|
|
422 |
* for the format elements contained in it.
|
|
423 |
* Patterns and their interpretation are specified in the
|
|
424 |
* <a href="#patterns">class description</a>.
|
|
425 |
*
|
|
426 |
* @param pattern the pattern for this message format
|
|
427 |
* @exception IllegalArgumentException if the pattern is invalid
|
|
428 |
*/
|
|
429 |
public void applyPattern(String pattern) {
|
|
430 |
StringBuffer[] segments = new StringBuffer[4];
|
|
431 |
for (int i = 0; i < segments.length; ++i) {
|
|
432 |
segments[i] = new StringBuffer();
|
|
433 |
}
|
|
434 |
int part = 0;
|
|
435 |
int formatNumber = 0;
|
|
436 |
boolean inQuote = false;
|
|
437 |
int braceStack = 0;
|
|
438 |
maxOffset = -1;
|
|
439 |
for (int i = 0; i < pattern.length(); ++i) {
|
|
440 |
char ch = pattern.charAt(i);
|
|
441 |
if (part == 0) {
|
|
442 |
if (ch == '\'') {
|
|
443 |
if (i + 1 < pattern.length()
|
|
444 |
&& pattern.charAt(i+1) == '\'') {
|
|
445 |
segments[part].append(ch); // handle doubles
|
|
446 |
++i;
|
|
447 |
} else {
|
|
448 |
inQuote = !inQuote;
|
|
449 |
}
|
|
450 |
} else if (ch == '{' && !inQuote) {
|
|
451 |
part = 1;
|
|
452 |
} else {
|
|
453 |
segments[part].append(ch);
|
|
454 |
}
|
|
455 |
} else if (inQuote) { // just copy quotes in parts
|
|
456 |
segments[part].append(ch);
|
|
457 |
if (ch == '\'') {
|
|
458 |
inQuote = false;
|
|
459 |
}
|
|
460 |
} else {
|
|
461 |
switch (ch) {
|
|
462 |
case ',':
|
|
463 |
if (part < 3)
|
|
464 |
part += 1;
|
|
465 |
else
|
|
466 |
segments[part].append(ch);
|
|
467 |
break;
|
|
468 |
case '{':
|
|
469 |
++braceStack;
|
|
470 |
segments[part].append(ch);
|
|
471 |
break;
|
|
472 |
case '}':
|
|
473 |
if (braceStack == 0) {
|
|
474 |
part = 0;
|
|
475 |
makeFormat(i, formatNumber, segments);
|
|
476 |
formatNumber++;
|
|
477 |
} else {
|
|
478 |
--braceStack;
|
|
479 |
segments[part].append(ch);
|
|
480 |
}
|
|
481 |
break;
|
|
482 |
case '\'':
|
|
483 |
inQuote = true;
|
|
484 |
// fall through, so we keep quotes in other parts
|
|
485 |
default:
|
|
486 |
segments[part].append(ch);
|
|
487 |
break;
|
|
488 |
}
|
|
489 |
}
|
|
490 |
}
|
|
491 |
if (braceStack == 0 && part != 0) {
|
|
492 |
maxOffset = -1;
|
|
493 |
throw new IllegalArgumentException("Unmatched braces in the pattern.");
|
|
494 |
}
|
|
495 |
this.pattern = segments[0].toString();
|
|
496 |
}
|
|
497 |
|
|
498 |
|
|
499 |
/**
|
|
500 |
* Returns a pattern representing the current state of the message format.
|
|
501 |
* The string is constructed from internal information and therefore
|
|
502 |
* does not necessarily equal the previously applied pattern.
|
|
503 |
*
|
|
504 |
* @return a pattern representing the current state of the message format
|
|
505 |
*/
|
|
506 |
public String toPattern() {
|
|
507 |
// later, make this more extensible
|
|
508 |
int lastOffset = 0;
|
|
509 |
StringBuffer result = new StringBuffer();
|
|
510 |
for (int i = 0; i <= maxOffset; ++i) {
|
|
511 |
copyAndFixQuotes(pattern, lastOffset, offsets[i],result);
|
|
512 |
lastOffset = offsets[i];
|
|
513 |
result.append('{');
|
|
514 |
result.append(argumentNumbers[i]);
|
|
515 |
if (formats[i] == null) {
|
|
516 |
// do nothing, string format
|
|
517 |
} else if (formats[i] instanceof DecimalFormat) {
|
|
518 |
if (formats[i].equals(NumberFormat.getInstance(locale))) {
|
|
519 |
result.append(",number");
|
|
520 |
} else if (formats[i].equals(NumberFormat.getCurrencyInstance(locale))) {
|
|
521 |
result.append(",number,currency");
|
|
522 |
} else if (formats[i].equals(NumberFormat.getPercentInstance(locale))) {
|
|
523 |
result.append(",number,percent");
|
|
524 |
} else if (formats[i].equals(NumberFormat.getIntegerInstance(locale))) {
|
|
525 |
result.append(",number,integer");
|
|
526 |
} else {
|
|
527 |
result.append(",number," +
|
|
528 |
((DecimalFormat)formats[i]).toPattern());
|
|
529 |
}
|
|
530 |
} else if (formats[i] instanceof SimpleDateFormat) {
|
|
531 |
if (formats[i].equals(DateFormat.getDateInstance(
|
|
532 |
DateFormat.DEFAULT,locale))) {
|
|
533 |
result.append(",date");
|
|
534 |
} else if (formats[i].equals(DateFormat.getDateInstance(
|
|
535 |
DateFormat.SHORT,locale))) {
|
|
536 |
result.append(",date,short");
|
|
537 |
} else if (formats[i].equals(DateFormat.getDateInstance(
|
|
538 |
DateFormat.DEFAULT,locale))) {
|
|
539 |
result.append(",date,medium");
|
|
540 |
} else if (formats[i].equals(DateFormat.getDateInstance(
|
|
541 |
DateFormat.LONG,locale))) {
|
|
542 |
result.append(",date,long");
|
|
543 |
} else if (formats[i].equals(DateFormat.getDateInstance(
|
|
544 |
DateFormat.FULL,locale))) {
|
|
545 |
result.append(",date,full");
|
|
546 |
} else if (formats[i].equals(DateFormat.getTimeInstance(
|
|
547 |
DateFormat.DEFAULT,locale))) {
|
|
548 |
result.append(",time");
|
|
549 |
} else if (formats[i].equals(DateFormat.getTimeInstance(
|
|
550 |
DateFormat.SHORT,locale))) {
|
|
551 |
result.append(",time,short");
|
|
552 |
} else if (formats[i].equals(DateFormat.getTimeInstance(
|
|
553 |
DateFormat.DEFAULT,locale))) {
|
|
554 |
result.append(",time,medium");
|
|
555 |
} else if (formats[i].equals(DateFormat.getTimeInstance(
|
|
556 |
DateFormat.LONG,locale))) {
|
|
557 |
result.append(",time,long");
|
|
558 |
} else if (formats[i].equals(DateFormat.getTimeInstance(
|
|
559 |
DateFormat.FULL,locale))) {
|
|
560 |
result.append(",time,full");
|
|
561 |
} else {
|
|
562 |
result.append(",date,"
|
|
563 |
+ ((SimpleDateFormat)formats[i]).toPattern());
|
|
564 |
}
|
|
565 |
} else if (formats[i] instanceof ChoiceFormat) {
|
|
566 |
result.append(",choice,"
|
|
567 |
+ ((ChoiceFormat)formats[i]).toPattern());
|
|
568 |
} else {
|
|
569 |
//result.append(", unknown");
|
|
570 |
}
|
|
571 |
result.append('}');
|
|
572 |
}
|
|
573 |
copyAndFixQuotes(pattern, lastOffset, pattern.length(), result);
|
|
574 |
return result.toString();
|
|
575 |
}
|
|
576 |
|
|
577 |
/**
|
|
578 |
* Sets the formats to use for the values passed into
|
|
579 |
* <code>format</code> methods or returned from <code>parse</code>
|
|
580 |
* methods. The indices of elements in <code>newFormats</code>
|
|
581 |
* correspond to the argument indices used in the previously set
|
|
582 |
* pattern string.
|
|
583 |
* The order of formats in <code>newFormats</code> thus corresponds to
|
|
584 |
* the order of elements in the <code>arguments</code> array passed
|
|
585 |
* to the <code>format</code> methods or the result array returned
|
|
586 |
* by the <code>parse</code> methods.
|
|
587 |
* <p>
|
|
588 |
* If an argument index is used for more than one format element
|
|
589 |
* in the pattern string, then the corresponding new format is used
|
|
590 |
* for all such format elements. If an argument index is not used
|
|
591 |
* for any format element in the pattern string, then the
|
|
592 |
* corresponding new format is ignored. If fewer formats are provided
|
|
593 |
* than needed, then only the formats for argument indices less
|
|
594 |
* than <code>newFormats.length</code> are replaced.
|
|
595 |
*
|
|
596 |
* @param newFormats the new formats to use
|
|
597 |
* @exception NullPointerException if <code>newFormats</code> is null
|
|
598 |
* @since 1.4
|
|
599 |
*/
|
|
600 |
public void setFormatsByArgumentIndex(Format[] newFormats) {
|
|
601 |
for (int i = 0; i <= maxOffset; i++) {
|
|
602 |
int j = argumentNumbers[i];
|
|
603 |
if (j < newFormats.length) {
|
|
604 |
formats[i] = newFormats[j];
|
|
605 |
}
|
|
606 |
}
|
|
607 |
}
|
|
608 |
|
|
609 |
/**
|
|
610 |
* Sets the formats to use for the format elements in the
|
|
611 |
* previously set pattern string.
|
|
612 |
* The order of formats in <code>newFormats</code> corresponds to
|
|
613 |
* the order of format elements in the pattern string.
|
|
614 |
* <p>
|
|
615 |
* If more formats are provided than needed by the pattern string,
|
|
616 |
* the remaining ones are ignored. If fewer formats are provided
|
|
617 |
* than needed, then only the first <code>newFormats.length</code>
|
|
618 |
* formats are replaced.
|
|
619 |
* <p>
|
|
620 |
* Since the order of format elements in a pattern string often
|
|
621 |
* changes during localization, it is generally better to use the
|
|
622 |
* {@link #setFormatsByArgumentIndex setFormatsByArgumentIndex}
|
|
623 |
* method, which assumes an order of formats corresponding to the
|
|
624 |
* order of elements in the <code>arguments</code> array passed to
|
|
625 |
* the <code>format</code> methods or the result array returned by
|
|
626 |
* the <code>parse</code> methods.
|
|
627 |
*
|
|
628 |
* @param newFormats the new formats to use
|
|
629 |
* @exception NullPointerException if <code>newFormats</code> is null
|
|
630 |
*/
|
|
631 |
public void setFormats(Format[] newFormats) {
|
|
632 |
int runsToCopy = newFormats.length;
|
|
633 |
if (runsToCopy > maxOffset + 1) {
|
|
634 |
runsToCopy = maxOffset + 1;
|
|
635 |
}
|
|
636 |
for (int i = 0; i < runsToCopy; i++) {
|
|
637 |
formats[i] = newFormats[i];
|
|
638 |
}
|
|
639 |
}
|
|
640 |
|
|
641 |
/**
|
|
642 |
* Sets the format to use for the format elements within the
|
|
643 |
* previously set pattern string that use the given argument
|
|
644 |
* index.
|
|
645 |
* The argument index is part of the format element definition and
|
|
646 |
* represents an index into the <code>arguments</code> array passed
|
|
647 |
* to the <code>format</code> methods or the result array returned
|
|
648 |
* by the <code>parse</code> methods.
|
|
649 |
* <p>
|
|
650 |
* If the argument index is used for more than one format element
|
|
651 |
* in the pattern string, then the new format is used for all such
|
|
652 |
* format elements. If the argument index is not used for any format
|
|
653 |
* element in the pattern string, then the new format is ignored.
|
|
654 |
*
|
|
655 |
* @param argumentIndex the argument index for which to use the new format
|
|
656 |
* @param newFormat the new format to use
|
|
657 |
* @since 1.4
|
|
658 |
*/
|
|
659 |
public void setFormatByArgumentIndex(int argumentIndex, Format newFormat) {
|
|
660 |
for (int j = 0; j <= maxOffset; j++) {
|
|
661 |
if (argumentNumbers[j] == argumentIndex) {
|
|
662 |
formats[j] = newFormat;
|
|
663 |
}
|
|
664 |
}
|
|
665 |
}
|
|
666 |
|
|
667 |
/**
|
|
668 |
* Sets the format to use for the format element with the given
|
|
669 |
* format element index within the previously set pattern string.
|
|
670 |
* The format element index is the zero-based number of the format
|
|
671 |
* element counting from the start of the pattern string.
|
|
672 |
* <p>
|
|
673 |
* Since the order of format elements in a pattern string often
|
|
674 |
* changes during localization, it is generally better to use the
|
|
675 |
* {@link #setFormatByArgumentIndex setFormatByArgumentIndex}
|
|
676 |
* method, which accesses format elements based on the argument
|
|
677 |
* index they specify.
|
|
678 |
*
|
|
679 |
* @param formatElementIndex the index of a format element within the pattern
|
|
680 |
* @param newFormat the format to use for the specified format element
|
|
681 |
* @exception ArrayIndexOutOfBoundsException if formatElementIndex is equal to or
|
|
682 |
* larger than the number of format elements in the pattern string
|
|
683 |
*/
|
|
684 |
public void setFormat(int formatElementIndex, Format newFormat) {
|
|
685 |
formats[formatElementIndex] = newFormat;
|
|
686 |
}
|
|
687 |
|
|
688 |
/**
|
|
689 |
* Gets the formats used for the values passed into
|
|
690 |
* <code>format</code> methods or returned from <code>parse</code>
|
|
691 |
* methods. The indices of elements in the returned array
|
|
692 |
* correspond to the argument indices used in the previously set
|
|
693 |
* pattern string.
|
|
694 |
* The order of formats in the returned array thus corresponds to
|
|
695 |
* the order of elements in the <code>arguments</code> array passed
|
|
696 |
* to the <code>format</code> methods or the result array returned
|
|
697 |
* by the <code>parse</code> methods.
|
|
698 |
* <p>
|
|
699 |
* If an argument index is used for more than one format element
|
|
700 |
* in the pattern string, then the format used for the last such
|
|
701 |
* format element is returned in the array. If an argument index
|
|
702 |
* is not used for any format element in the pattern string, then
|
|
703 |
* null is returned in the array.
|
|
704 |
*
|
|
705 |
* @return the formats used for the arguments within the pattern
|
|
706 |
* @since 1.4
|
|
707 |
*/
|
|
708 |
public Format[] getFormatsByArgumentIndex() {
|
|
709 |
int maximumArgumentNumber = -1;
|
|
710 |
for (int i = 0; i <= maxOffset; i++) {
|
|
711 |
if (argumentNumbers[i] > maximumArgumentNumber) {
|
|
712 |
maximumArgumentNumber = argumentNumbers[i];
|
|
713 |
}
|
|
714 |
}
|
|
715 |
Format[] resultArray = new Format[maximumArgumentNumber + 1];
|
|
716 |
for (int i = 0; i <= maxOffset; i++) {
|
|
717 |
resultArray[argumentNumbers[i]] = formats[i];
|
|
718 |
}
|
|
719 |
return resultArray;
|
|
720 |
}
|
|
721 |
|
|
722 |
/**
|
|
723 |
* Gets the formats used for the format elements in the
|
|
724 |
* previously set pattern string.
|
|
725 |
* The order of formats in the returned array corresponds to
|
|
726 |
* the order of format elements in the pattern string.
|
|
727 |
* <p>
|
|
728 |
* Since the order of format elements in a pattern string often
|
|
729 |
* changes during localization, it's generally better to use the
|
|
730 |
* {@link #getFormatsByArgumentIndex getFormatsByArgumentIndex}
|
|
731 |
* method, which assumes an order of formats corresponding to the
|
|
732 |
* order of elements in the <code>arguments</code> array passed to
|
|
733 |
* the <code>format</code> methods or the result array returned by
|
|
734 |
* the <code>parse</code> methods.
|
|
735 |
*
|
|
736 |
* @return the formats used for the format elements in the pattern
|
|
737 |
*/
|
|
738 |
public Format[] getFormats() {
|
|
739 |
Format[] resultArray = new Format[maxOffset + 1];
|
|
740 |
System.arraycopy(formats, 0, resultArray, 0, maxOffset + 1);
|
|
741 |
return resultArray;
|
|
742 |
}
|
|
743 |
|
|
744 |
/**
|
|
745 |
* Formats an array of objects and appends the <code>MessageFormat</code>'s
|
|
746 |
* pattern, with format elements replaced by the formatted objects, to the
|
|
747 |
* provided <code>StringBuffer</code>.
|
|
748 |
* <p>
|
|
749 |
* The text substituted for the individual format elements is derived from
|
|
750 |
* the current subformat of the format element and the
|
|
751 |
* <code>arguments</code> element at the format element's argument index
|
|
752 |
* as indicated by the first matching line of the following table. An
|
|
753 |
* argument is <i>unavailable</i> if <code>arguments</code> is
|
|
754 |
* <code>null</code> or has fewer than argumentIndex+1 elements.
|
|
755 |
* <p>
|
|
756 |
* <table border=1 summary="Examples of subformat,argument,and formatted text">
|
|
757 |
* <tr>
|
|
758 |
* <th>Subformat
|
|
759 |
* <th>Argument
|
|
760 |
* <th>Formatted Text
|
|
761 |
* <tr>
|
|
762 |
* <td><i>any</i>
|
|
763 |
* <td><i>unavailable</i>
|
|
764 |
* <td><code>"{" + argumentIndex + "}"</code>
|
|
765 |
* <tr>
|
|
766 |
* <td><i>any</i>
|
|
767 |
* <td><code>null</code>
|
|
768 |
* <td><code>"null"</code>
|
|
769 |
* <tr>
|
|
770 |
* <td><code>instanceof ChoiceFormat</code>
|
|
771 |
* <td><i>any</i>
|
|
772 |
* <td><code>subformat.format(argument).indexOf('{') >= 0 ?<br>
|
|
773 |
* (new MessageFormat(subformat.format(argument), getLocale())).format(argument) :
|
|
774 |
* subformat.format(argument)</code>
|
|
775 |
* <tr>
|
|
776 |
* <td><code>!= null</code>
|
|
777 |
* <td><i>any</i>
|
|
778 |
* <td><code>subformat.format(argument)</code>
|
|
779 |
* <tr>
|
|
780 |
* <td><code>null</code>
|
|
781 |
* <td><code>instanceof Number</code>
|
|
782 |
* <td><code>NumberFormat.getInstance(getLocale()).format(argument)</code>
|
|
783 |
* <tr>
|
|
784 |
* <td><code>null</code>
|
|
785 |
* <td><code>instanceof Date</code>
|
|
786 |
* <td><code>DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT, getLocale()).format(argument)</code>
|
|
787 |
* <tr>
|
|
788 |
* <td><code>null</code>
|
|
789 |
* <td><code>instanceof String</code>
|
|
790 |
* <td><code>argument</code>
|
|
791 |
* <tr>
|
|
792 |
* <td><code>null</code>
|
|
793 |
* <td><i>any</i>
|
|
794 |
* <td><code>argument.toString()</code>
|
|
795 |
* </table>
|
|
796 |
* <p>
|
|
797 |
* If <code>pos</code> is non-null, and refers to
|
|
798 |
* <code>Field.ARGUMENT</code>, the location of the first formatted
|
|
799 |
* string will be returned.
|
|
800 |
*
|
|
801 |
* @param arguments an array of objects to be formatted and substituted.
|
|
802 |
* @param result where text is appended.
|
|
803 |
* @param pos On input: an alignment field, if desired.
|
|
804 |
* On output: the offsets of the alignment field.
|
|
805 |
* @exception IllegalArgumentException if an argument in the
|
|
806 |
* <code>arguments</code> array is not of the type
|
|
807 |
* expected by the format element(s) that use it.
|
|
808 |
*/
|
|
809 |
public final StringBuffer format(Object[] arguments, StringBuffer result,
|
|
810 |
FieldPosition pos)
|
|
811 |
{
|
|
812 |
return subformat(arguments, result, pos, null);
|
|
813 |
}
|
|
814 |
|
|
815 |
/**
|
|
816 |
* Creates a MessageFormat with the given pattern and uses it
|
|
817 |
* to format the given arguments. This is equivalent to
|
|
818 |
* <blockquote>
|
|
819 |
* <code>(new {@link #MessageFormat(String) MessageFormat}(pattern)).{@link #format(java.lang.Object[], java.lang.StringBuffer, java.text.FieldPosition) format}(arguments, new StringBuffer(), null).toString()</code>
|
|
820 |
* </blockquote>
|
|
821 |
*
|
|
822 |
* @exception IllegalArgumentException if the pattern is invalid,
|
|
823 |
* or if an argument in the <code>arguments</code> array
|
|
824 |
* is not of the type expected by the format element(s)
|
|
825 |
* that use it.
|
|
826 |
*/
|
|
827 |
public static String format(String pattern, Object ... arguments) {
|
|
828 |
MessageFormat temp = new MessageFormat(pattern);
|
|
829 |
return temp.format(arguments);
|
|
830 |
}
|
|
831 |
|
|
832 |
// Overrides
|
|
833 |
/**
|
|
834 |
* Formats an array of objects and appends the <code>MessageFormat</code>'s
|
|
835 |
* pattern, with format elements replaced by the formatted objects, to the
|
|
836 |
* provided <code>StringBuffer</code>.
|
|
837 |
* This is equivalent to
|
|
838 |
* <blockquote>
|
|
839 |
* <code>{@link #format(java.lang.Object[], java.lang.StringBuffer, java.text.FieldPosition) format}((Object[]) arguments, result, pos)</code>
|
|
840 |
* </blockquote>
|
|
841 |
*
|
|
842 |
* @param arguments an array of objects to be formatted and substituted.
|
|
843 |
* @param result where text is appended.
|
|
844 |
* @param pos On input: an alignment field, if desired.
|
|
845 |
* On output: the offsets of the alignment field.
|
|
846 |
* @exception IllegalArgumentException if an argument in the
|
|
847 |
* <code>arguments</code> array is not of the type
|
|
848 |
* expected by the format element(s) that use it.
|
|
849 |
*/
|
|
850 |
public final StringBuffer format(Object arguments, StringBuffer result,
|
|
851 |
FieldPosition pos)
|
|
852 |
{
|
|
853 |
return subformat((Object[]) arguments, result, pos, null);
|
|
854 |
}
|
|
855 |
|
|
856 |
/**
|
|
857 |
* Formats an array of objects and inserts them into the
|
|
858 |
* <code>MessageFormat</code>'s pattern, producing an
|
|
859 |
* <code>AttributedCharacterIterator</code>.
|
|
860 |
* You can use the returned <code>AttributedCharacterIterator</code>
|
|
861 |
* to build the resulting String, as well as to determine information
|
|
862 |
* about the resulting String.
|
|
863 |
* <p>
|
|
864 |
* The text of the returned <code>AttributedCharacterIterator</code> is
|
|
865 |
* the same that would be returned by
|
|
866 |
* <blockquote>
|
|
867 |
* <code>{@link #format(java.lang.Object[], java.lang.StringBuffer, java.text.FieldPosition) format}(arguments, new StringBuffer(), null).toString()</code>
|
|
868 |
* </blockquote>
|
|
869 |
* <p>
|
|
870 |
* In addition, the <code>AttributedCharacterIterator</code> contains at
|
|
871 |
* least attributes indicating where text was generated from an
|
|
872 |
* argument in the <code>arguments</code> array. The keys of these attributes are of
|
|
873 |
* type <code>MessageFormat.Field</code>, their values are
|
|
874 |
* <code>Integer</code> objects indicating the index in the <code>arguments</code>
|
|
875 |
* array of the argument from which the text was generated.
|
|
876 |
* <p>
|
|
877 |
* The attributes/value from the underlying <code>Format</code>
|
|
878 |
* instances that <code>MessageFormat</code> uses will also be
|
|
879 |
* placed in the resulting <code>AttributedCharacterIterator</code>.
|
|
880 |
* This allows you to not only find where an argument is placed in the
|
|
881 |
* resulting String, but also which fields it contains in turn.
|
|
882 |
*
|
|
883 |
* @param arguments an array of objects to be formatted and substituted.
|
|
884 |
* @return AttributedCharacterIterator describing the formatted value.
|
|
885 |
* @exception NullPointerException if <code>arguments</code> is null.
|
|
886 |
* @exception IllegalArgumentException if an argument in the
|
|
887 |
* <code>arguments</code> array is not of the type
|
|
888 |
* expected by the format element(s) that use it.
|
|
889 |
* @since 1.4
|
|
890 |
*/
|
|
891 |
public AttributedCharacterIterator formatToCharacterIterator(Object arguments) {
|
|
892 |
StringBuffer result = new StringBuffer();
|
|
893 |
ArrayList iterators = new ArrayList();
|
|
894 |
|
|
895 |
if (arguments == null) {
|
|
896 |
throw new NullPointerException(
|
|
897 |
"formatToCharacterIterator must be passed non-null object");
|
|
898 |
}
|
|
899 |
subformat((Object[]) arguments, result, null, iterators);
|
|
900 |
if (iterators.size() == 0) {
|
|
901 |
return createAttributedCharacterIterator("");
|
|
902 |
}
|
|
903 |
return createAttributedCharacterIterator(
|
|
904 |
(AttributedCharacterIterator[])iterators.toArray(
|
|
905 |
new AttributedCharacterIterator[iterators.size()]));
|
|
906 |
}
|
|
907 |
|
|
908 |
/**
|
|
909 |
* Parses the string.
|
|
910 |
*
|
|
911 |
* <p>Caveats: The parse may fail in a number of circumstances.
|
|
912 |
* For example:
|
|
913 |
* <ul>
|
|
914 |
* <li>If one of the arguments does not occur in the pattern.
|
|
915 |
* <li>If the format of an argument loses information, such as
|
|
916 |
* with a choice format where a large number formats to "many".
|
|
917 |
* <li>Does not yet handle recursion (where
|
|
918 |
* the substituted strings contain {n} references.)
|
|
919 |
* <li>Will not always find a match (or the correct match)
|
|
920 |
* if some part of the parse is ambiguous.
|
|
921 |
* For example, if the pattern "{1},{2}" is used with the
|
|
922 |
* string arguments {"a,b", "c"}, it will format as "a,b,c".
|
|
923 |
* When the result is parsed, it will return {"a", "b,c"}.
|
|
924 |
* <li>If a single argument is parsed more than once in the string,
|
|
925 |
* then the later parse wins.
|
|
926 |
* </ul>
|
|
927 |
* When the parse fails, use ParsePosition.getErrorIndex() to find out
|
|
928 |
* where in the string the parsing failed. The returned error
|
|
929 |
* index is the starting offset of the sub-patterns that the string
|
|
930 |
* is comparing with. For example, if the parsing string "AAA {0} BBB"
|
|
931 |
* is comparing against the pattern "AAD {0} BBB", the error index is
|
|
932 |
* 0. When an error occurs, the call to this method will return null.
|
|
933 |
* If the source is null, return an empty array.
|
|
934 |
*/
|
|
935 |
public Object[] parse(String source, ParsePosition pos) {
|
|
936 |
if (source == null) {
|
|
937 |
Object[] empty = {};
|
|
938 |
return empty;
|
|
939 |
}
|
|
940 |
|
|
941 |
int maximumArgumentNumber = -1;
|
|
942 |
for (int i = 0; i <= maxOffset; i++) {
|
|
943 |
if (argumentNumbers[i] > maximumArgumentNumber) {
|
|
944 |
maximumArgumentNumber = argumentNumbers[i];
|
|
945 |
}
|
|
946 |
}
|
|
947 |
Object[] resultArray = new Object[maximumArgumentNumber + 1];
|
|
948 |
|
|
949 |
int patternOffset = 0;
|
|
950 |
int sourceOffset = pos.index;
|
|
951 |
ParsePosition tempStatus = new ParsePosition(0);
|
|
952 |
for (int i = 0; i <= maxOffset; ++i) {
|
|
953 |
// match up to format
|
|
954 |
int len = offsets[i] - patternOffset;
|
|
955 |
if (len == 0 || pattern.regionMatches(patternOffset,
|
|
956 |
source, sourceOffset, len)) {
|
|
957 |
sourceOffset += len;
|
|
958 |
patternOffset += len;
|
|
959 |
} else {
|
|
960 |
pos.errorIndex = sourceOffset;
|
|
961 |
return null; // leave index as is to signal error
|
|
962 |
}
|
|
963 |
|
|
964 |
// now use format
|
|
965 |
if (formats[i] == null) { // string format
|
|
966 |
// if at end, use longest possible match
|
|
967 |
// otherwise uses first match to intervening string
|
|
968 |
// does NOT recursively try all possibilities
|
|
969 |
int tempLength = (i != maxOffset) ? offsets[i+1] : pattern.length();
|
|
970 |
|
|
971 |
int next;
|
|
972 |
if (patternOffset >= tempLength) {
|
|
973 |
next = source.length();
|
|
974 |
}else{
|
|
975 |
next = source.indexOf( pattern.substring(patternOffset,tempLength), sourceOffset);
|
|
976 |
}
|
|
977 |
|
|
978 |
if (next < 0) {
|
|
979 |
pos.errorIndex = sourceOffset;
|
|
980 |
return null; // leave index as is to signal error
|
|
981 |
} else {
|
|
982 |
String strValue= source.substring(sourceOffset,next);
|
|
983 |
if (!strValue.equals("{"+argumentNumbers[i]+"}"))
|
|
984 |
resultArray[argumentNumbers[i]]
|
|
985 |
= source.substring(sourceOffset,next);
|
|
986 |
sourceOffset = next;
|
|
987 |
}
|
|
988 |
} else {
|
|
989 |
tempStatus.index = sourceOffset;
|
|
990 |
resultArray[argumentNumbers[i]]
|
|
991 |
= formats[i].parseObject(source,tempStatus);
|
|
992 |
if (tempStatus.index == sourceOffset) {
|
|
993 |
pos.errorIndex = sourceOffset;
|
|
994 |
return null; // leave index as is to signal error
|
|
995 |
}
|
|
996 |
sourceOffset = tempStatus.index; // update
|
|
997 |
}
|
|
998 |
}
|
|
999 |
int len = pattern.length() - patternOffset;
|
|
1000 |
if (len == 0 || pattern.regionMatches(patternOffset,
|
|
1001 |
source, sourceOffset, len)) {
|
|
1002 |
pos.index = sourceOffset + len;
|
|
1003 |
} else {
|
|
1004 |
pos.errorIndex = sourceOffset;
|
|
1005 |
return null; // leave index as is to signal error
|
|
1006 |
}
|
|
1007 |
return resultArray;
|
|
1008 |
}
|
|
1009 |
|
|
1010 |
/**
|
|
1011 |
* Parses text from the beginning of the given string to produce an object
|
|
1012 |
* array.
|
|
1013 |
* The method may not use the entire text of the given string.
|
|
1014 |
* <p>
|
|
1015 |
* See the {@link #parse(String, ParsePosition)} method for more information
|
|
1016 |
* on message parsing.
|
|
1017 |
*
|
|
1018 |
* @param source A <code>String</code> whose beginning should be parsed.
|
|
1019 |
* @return An <code>Object</code> array parsed from the string.
|
|
1020 |
* @exception ParseException if the beginning of the specified string
|
|
1021 |
* cannot be parsed.
|
|
1022 |
*/
|
|
1023 |
public Object[] parse(String source) throws ParseException {
|
|
1024 |
ParsePosition pos = new ParsePosition(0);
|
|
1025 |
Object[] result = parse(source, pos);
|
|
1026 |
if (pos.index == 0) // unchanged, returned object is null
|
|
1027 |
throw new ParseException("MessageFormat parse error!", pos.errorIndex);
|
|
1028 |
|
|
1029 |
return result;
|
|
1030 |
}
|
|
1031 |
|
|
1032 |
/**
|
|
1033 |
* Parses text from a string to produce an object array.
|
|
1034 |
* <p>
|
|
1035 |
* The method attempts to parse text starting at the index given by
|
|
1036 |
* <code>pos</code>.
|
|
1037 |
* If parsing succeeds, then the index of <code>pos</code> is updated
|
|
1038 |
* to the index after the last character used (parsing does not necessarily
|
|
1039 |
* use all characters up to the end of the string), and the parsed
|
|
1040 |
* object array is returned. The updated <code>pos</code> can be used to
|
|
1041 |
* indicate the starting point for the next call to this method.
|
|
1042 |
* If an error occurs, then the index of <code>pos</code> is not
|
|
1043 |
* changed, the error index of <code>pos</code> is set to the index of
|
|
1044 |
* the character where the error occurred, and null is returned.
|
|
1045 |
* <p>
|
|
1046 |
* See the {@link #parse(String, ParsePosition)} method for more information
|
|
1047 |
* on message parsing.
|
|
1048 |
*
|
|
1049 |
* @param source A <code>String</code>, part of which should be parsed.
|
|
1050 |
* @param pos A <code>ParsePosition</code> object with index and error
|
|
1051 |
* index information as described above.
|
|
1052 |
* @return An <code>Object</code> array parsed from the string. In case of
|
|
1053 |
* error, returns null.
|
|
1054 |
* @exception NullPointerException if <code>pos</code> is null.
|
|
1055 |
*/
|
|
1056 |
public Object parseObject(String source, ParsePosition pos) {
|
|
1057 |
return parse(source, pos);
|
|
1058 |
}
|
|
1059 |
|
|
1060 |
/**
|
|
1061 |
* Creates and returns a copy of this object.
|
|
1062 |
*
|
|
1063 |
* @return a clone of this instance.
|
|
1064 |
*/
|
|
1065 |
public Object clone() {
|
|
1066 |
MessageFormat other = (MessageFormat) super.clone();
|
|
1067 |
|
|
1068 |
// clone arrays. Can't do with utility because of bug in Cloneable
|
|
1069 |
other.formats = (Format[]) formats.clone(); // shallow clone
|
|
1070 |
for (int i = 0; i < formats.length; ++i) {
|
|
1071 |
if (formats[i] != null)
|
|
1072 |
other.formats[i] = (Format)formats[i].clone();
|
|
1073 |
}
|
|
1074 |
// for primitives or immutables, shallow clone is enough
|
|
1075 |
other.offsets = (int[]) offsets.clone();
|
|
1076 |
other.argumentNumbers = (int[]) argumentNumbers.clone();
|
|
1077 |
|
|
1078 |
return other;
|
|
1079 |
}
|
|
1080 |
|
|
1081 |
/**
|
|
1082 |
* Equality comparison between two message format objects
|
|
1083 |
*/
|
|
1084 |
public boolean equals(Object obj) {
|
|
1085 |
if (this == obj) // quick check
|
|
1086 |
return true;
|
|
1087 |
if (obj == null || getClass() != obj.getClass())
|
|
1088 |
return false;
|
|
1089 |
MessageFormat other = (MessageFormat) obj;
|
|
1090 |
return (maxOffset == other.maxOffset
|
|
1091 |
&& pattern.equals(other.pattern)
|
|
1092 |
&& ((locale != null && locale.equals(other.locale))
|
|
1093 |
|| (locale == null && other.locale == null))
|
|
1094 |
&& Arrays.equals(offsets,other.offsets)
|
|
1095 |
&& Arrays.equals(argumentNumbers,other.argumentNumbers)
|
|
1096 |
&& Arrays.equals(formats,other.formats));
|
|
1097 |
}
|
|
1098 |
|
|
1099 |
/**
|
|
1100 |
* Generates a hash code for the message format object.
|
|
1101 |
*/
|
|
1102 |
public int hashCode() {
|
|
1103 |
return pattern.hashCode(); // enough for reasonable distribution
|
|
1104 |
}
|
|
1105 |
|
|
1106 |
|
|
1107 |
/**
|
|
1108 |
* Defines constants that are used as attribute keys in the
|
|
1109 |
* <code>AttributedCharacterIterator</code> returned
|
|
1110 |
* from <code>MessageFormat.formatToCharacterIterator</code>.
|
|
1111 |
*
|
|
1112 |
* @since 1.4
|
|
1113 |
*/
|
|
1114 |
public static class Field extends Format.Field {
|
|
1115 |
|
|
1116 |
// Proclaim serial compatibility with 1.4 FCS
|
|
1117 |
private static final long serialVersionUID = 7899943957617360810L;
|
|
1118 |
|
|
1119 |
/**
|
|
1120 |
* Creates a Field with the specified name.
|
|
1121 |
*
|
|
1122 |
* @param name Name of the attribute
|
|
1123 |
*/
|
|
1124 |
protected Field(String name) {
|
|
1125 |
super(name);
|
|
1126 |
}
|
|
1127 |
|
|
1128 |
/**
|
|
1129 |
* Resolves instances being deserialized to the predefined constants.
|
|
1130 |
*
|
|
1131 |
* @throws InvalidObjectException if the constant could not be
|
|
1132 |
* resolved.
|
|
1133 |
* @return resolved MessageFormat.Field constant
|
|
1134 |
*/
|
|
1135 |
protected Object readResolve() throws InvalidObjectException {
|
|
1136 |
if (this.getClass() != MessageFormat.Field.class) {
|
|
1137 |
throw new InvalidObjectException("subclass didn't correctly implement readResolve");
|
|
1138 |
}
|
|
1139 |
|
|
1140 |
return ARGUMENT;
|
|
1141 |
}
|
|
1142 |
|
|
1143 |
//
|
|
1144 |
// The constants
|
|
1145 |
//
|
|
1146 |
|
|
1147 |
/**
|
|
1148 |
* Constant identifying a portion of a message that was generated
|
|
1149 |
* from an argument passed into <code>formatToCharacterIterator</code>.
|
|
1150 |
* The value associated with the key will be an <code>Integer</code>
|
|
1151 |
* indicating the index in the <code>arguments</code> array of the
|
|
1152 |
* argument from which the text was generated.
|
|
1153 |
*/
|
|
1154 |
public final static Field ARGUMENT =
|
|
1155 |
new Field("message argument field");
|
|
1156 |
}
|
|
1157 |
|
|
1158 |
// ===========================privates============================
|
|
1159 |
|
|
1160 |
/**
|
|
1161 |
* The locale to use for formatting numbers and dates.
|
|
1162 |
* @serial
|
|
1163 |
*/
|
|
1164 |
private Locale locale;
|
|
1165 |
|
|
1166 |
/**
|
|
1167 |
* The string that the formatted values are to be plugged into. In other words, this
|
|
1168 |
* is the pattern supplied on construction with all of the {} expressions taken out.
|
|
1169 |
* @serial
|
|
1170 |
*/
|
|
1171 |
private String pattern = "";
|
|
1172 |
|
|
1173 |
/** The initially expected number of subformats in the format */
|
|
1174 |
private static final int INITIAL_FORMATS = 10;
|
|
1175 |
|
|
1176 |
/**
|
|
1177 |
* An array of formatters, which are used to format the arguments.
|
|
1178 |
* @serial
|
|
1179 |
*/
|
|
1180 |
private Format[] formats = new Format[INITIAL_FORMATS];
|
|
1181 |
|
|
1182 |
/**
|
|
1183 |
* The positions where the results of formatting each argument are to be inserted
|
|
1184 |
* into the pattern.
|
|
1185 |
* @serial
|
|
1186 |
*/
|
|
1187 |
private int[] offsets = new int[INITIAL_FORMATS];
|
|
1188 |
|
|
1189 |
/**
|
|
1190 |
* The argument numbers corresponding to each formatter. (The formatters are stored
|
|
1191 |
* in the order they occur in the pattern, not in the order in which the arguments
|
|
1192 |
* are specified.)
|
|
1193 |
* @serial
|
|
1194 |
*/
|
|
1195 |
private int[] argumentNumbers = new int[INITIAL_FORMATS];
|
|
1196 |
|
|
1197 |
/**
|
|
1198 |
* One less than the number of entries in <code>offsets</code>. Can also be thought of
|
|
1199 |
* as the index of the highest-numbered element in <code>offsets</code> that is being used.
|
|
1200 |
* All of these arrays should have the same number of elements being used as <code>offsets</code>
|
|
1201 |
* does, and so this variable suffices to tell us how many entries are in all of them.
|
|
1202 |
* @serial
|
|
1203 |
*/
|
|
1204 |
private int maxOffset = -1;
|
|
1205 |
|
|
1206 |
/**
|
|
1207 |
* Internal routine used by format. If <code>characterIterators</code> is
|
|
1208 |
* non-null, AttributedCharacterIterator will be created from the
|
|
1209 |
* subformats as necessary. If <code>characterIterators</code> is null
|
|
1210 |
* and <code>fp</code> is non-null and identifies
|
|
1211 |
* <code>Field.MESSAGE_ARGUMENT</code>, the location of
|
|
1212 |
* the first replaced argument will be set in it.
|
|
1213 |
*
|
|
1214 |
* @exception IllegalArgumentException if an argument in the
|
|
1215 |
* <code>arguments</code> array is not of the type
|
|
1216 |
* expected by the format element(s) that use it.
|
|
1217 |
*/
|
|
1218 |
private StringBuffer subformat(Object[] arguments, StringBuffer result,
|
|
1219 |
FieldPosition fp, List characterIterators) {
|
|
1220 |
// note: this implementation assumes a fast substring & index.
|
|
1221 |
// if this is not true, would be better to append chars one by one.
|
|
1222 |
int lastOffset = 0;
|
|
1223 |
int last = result.length();
|
|
1224 |
for (int i = 0; i <= maxOffset; ++i) {
|
|
1225 |
result.append(pattern.substring(lastOffset, offsets[i]));
|
|
1226 |
lastOffset = offsets[i];
|
|
1227 |
int argumentNumber = argumentNumbers[i];
|
|
1228 |
if (arguments == null || argumentNumber >= arguments.length) {
|
|
1229 |
result.append("{" + argumentNumber + "}");
|
|
1230 |
continue;
|
|
1231 |
}
|
|
1232 |
// int argRecursion = ((recursionProtection >> (argumentNumber*2)) & 0x3);
|
|
1233 |
if (false) { // if (argRecursion == 3){
|
|
1234 |
// prevent loop!!!
|
|
1235 |
result.append('\uFFFD');
|
|
1236 |
} else {
|
|
1237 |
Object obj = arguments[argumentNumber];
|
|
1238 |
String arg = null;
|
|
1239 |
Format subFormatter = null;
|
|
1240 |
if (obj == null) {
|
|
1241 |
arg = "null";
|
|
1242 |
} else if (formats[i] != null) {
|
|
1243 |
subFormatter = formats[i];
|
|
1244 |
if (subFormatter instanceof ChoiceFormat) {
|
|
1245 |
arg = formats[i].format(obj);
|
|
1246 |
if (arg.indexOf('{') >= 0) {
|
|
1247 |
subFormatter = new MessageFormat(arg, locale);
|
|
1248 |
obj = arguments;
|
|
1249 |
arg = null;
|
|
1250 |
}
|
|
1251 |
}
|
|
1252 |
} else if (obj instanceof Number) {
|
|
1253 |
// format number if can
|
|
1254 |
subFormatter = NumberFormat.getInstance(locale);
|
|
1255 |
} else if (obj instanceof Date) {
|
|
1256 |
// format a Date if can
|
|
1257 |
subFormatter = DateFormat.getDateTimeInstance(
|
|
1258 |
DateFormat.SHORT, DateFormat.SHORT, locale);//fix
|
|
1259 |
} else if (obj instanceof String) {
|
|
1260 |
arg = (String) obj;
|
|
1261 |
|
|
1262 |
} else {
|
|
1263 |
arg = obj.toString();
|
|
1264 |
if (arg == null) arg = "null";
|
|
1265 |
}
|
|
1266 |
|
|
1267 |
// At this point we are in two states, either subFormatter
|
|
1268 |
// is non-null indicating we should format obj using it,
|
|
1269 |
// or arg is non-null and we should use it as the value.
|
|
1270 |
|
|
1271 |
if (characterIterators != null) {
|
|
1272 |
// If characterIterators is non-null, it indicates we need
|
|
1273 |
// to get the CharacterIterator from the child formatter.
|
|
1274 |
if (last != result.length()) {
|
|
1275 |
characterIterators.add(
|
|
1276 |
createAttributedCharacterIterator(result.substring
|
|
1277 |
(last)));
|
|
1278 |
last = result.length();
|
|
1279 |
}
|
|
1280 |
if (subFormatter != null) {
|
|
1281 |
AttributedCharacterIterator subIterator =
|
|
1282 |
subFormatter.formatToCharacterIterator(obj);
|
|
1283 |
|
|
1284 |
append(result, subIterator);
|
|
1285 |
if (last != result.length()) {
|
|
1286 |
characterIterators.add(
|
|
1287 |
createAttributedCharacterIterator(
|
|
1288 |
subIterator, Field.ARGUMENT,
|
|
1289 |
new Integer(argumentNumber)));
|
|
1290 |
last = result.length();
|
|
1291 |
}
|
|
1292 |
arg = null;
|
|
1293 |
}
|
|
1294 |
if (arg != null && arg.length() > 0) {
|
|
1295 |
result.append(arg);
|
|
1296 |
characterIterators.add(
|
|
1297 |
createAttributedCharacterIterator(
|
|
1298 |
arg, Field.ARGUMENT,
|
|
1299 |
new Integer(argumentNumber)));
|
|
1300 |
last = result.length();
|
|
1301 |
}
|
|
1302 |
}
|
|
1303 |
else {
|
|
1304 |
if (subFormatter != null) {
|
|
1305 |
arg = subFormatter.format(obj);
|
|
1306 |
}
|
|
1307 |
last = result.length();
|
|
1308 |
result.append(arg);
|
|
1309 |
if (i == 0 && fp != null && Field.ARGUMENT.equals(
|
|
1310 |
fp.getFieldAttribute())) {
|
|
1311 |
fp.setBeginIndex(last);
|
|
1312 |
fp.setEndIndex(result.length());
|
|
1313 |
}
|
|
1314 |
last = result.length();
|
|
1315 |
}
|
|
1316 |
}
|
|
1317 |
}
|
|
1318 |
result.append(pattern.substring(lastOffset, pattern.length()));
|
|
1319 |
if (characterIterators != null && last != result.length()) {
|
|
1320 |
characterIterators.add(createAttributedCharacterIterator(
|
|
1321 |
result.substring(last)));
|
|
1322 |
}
|
|
1323 |
return result;
|
|
1324 |
}
|
|
1325 |
|
|
1326 |
/**
|
|
1327 |
* Convenience method to append all the characters in
|
|
1328 |
* <code>iterator</code> to the StringBuffer <code>result</code>.
|
|
1329 |
*/
|
|
1330 |
private void append(StringBuffer result, CharacterIterator iterator) {
|
|
1331 |
if (iterator.first() != CharacterIterator.DONE) {
|
|
1332 |
char aChar;
|
|
1333 |
|
|
1334 |
result.append(iterator.first());
|
|
1335 |
while ((aChar = iterator.next()) != CharacterIterator.DONE) {
|
|
1336 |
result.append(aChar);
|
|
1337 |
}
|
|
1338 |
}
|
|
1339 |
}
|
|
1340 |
|
|
1341 |
private static final String[] typeList =
|
|
1342 |
{"", "", "number", "", "date", "", "time", "", "choice"};
|
|
1343 |
private static final String[] modifierList =
|
|
1344 |
{"", "", "currency", "", "percent", "", "integer"};
|
|
1345 |
private static final String[] dateModifierList =
|
|
1346 |
{"", "", "short", "", "medium", "", "long", "", "full"};
|
|
1347 |
|
|
1348 |
private void makeFormat(int position, int offsetNumber,
|
|
1349 |
StringBuffer[] segments)
|
|
1350 |
{
|
|
1351 |
// get the argument number
|
|
1352 |
int argumentNumber;
|
|
1353 |
try {
|
|
1354 |
argumentNumber = Integer.parseInt(segments[1].toString()); // always unlocalized!
|
|
1355 |
} catch (NumberFormatException e) {
|
|
1356 |
throw new IllegalArgumentException("can't parse argument number: " + segments[1]);
|
|
1357 |
}
|
|
1358 |
if (argumentNumber < 0) {
|
|
1359 |
throw new IllegalArgumentException("negative argument number: " + argumentNumber);
|
|
1360 |
}
|
|
1361 |
|
|
1362 |
// resize format information arrays if necessary
|
|
1363 |
if (offsetNumber >= formats.length) {
|
|
1364 |
int newLength = formats.length * 2;
|
|
1365 |
Format[] newFormats = new Format[newLength];
|
|
1366 |
int[] newOffsets = new int[newLength];
|
|
1367 |
int[] newArgumentNumbers = new int[newLength];
|
|
1368 |
System.arraycopy(formats, 0, newFormats, 0, maxOffset + 1);
|
|
1369 |
System.arraycopy(offsets, 0, newOffsets, 0, maxOffset + 1);
|
|
1370 |
System.arraycopy(argumentNumbers, 0, newArgumentNumbers, 0, maxOffset + 1);
|
|
1371 |
formats = newFormats;
|
|
1372 |
offsets = newOffsets;
|
|
1373 |
argumentNumbers = newArgumentNumbers;
|
|
1374 |
}
|
|
1375 |
int oldMaxOffset = maxOffset;
|
|
1376 |
maxOffset = offsetNumber;
|
|
1377 |
offsets[offsetNumber] = segments[0].length();
|
|
1378 |
argumentNumbers[offsetNumber] = argumentNumber;
|
|
1379 |
|
|
1380 |
// now get the format
|
|
1381 |
Format newFormat = null;
|
|
1382 |
switch (findKeyword(segments[2].toString(), typeList)) {
|
|
1383 |
case 0:
|
|
1384 |
break;
|
|
1385 |
case 1: case 2:// number
|
|
1386 |
switch (findKeyword(segments[3].toString(), modifierList)) {
|
|
1387 |
case 0: // default;
|
|
1388 |
newFormat = NumberFormat.getInstance(locale);
|
|
1389 |
break;
|
|
1390 |
case 1: case 2:// currency
|
|
1391 |
newFormat = NumberFormat.getCurrencyInstance(locale);
|
|
1392 |
break;
|
|
1393 |
case 3: case 4:// percent
|
|
1394 |
newFormat = NumberFormat.getPercentInstance(locale);
|
|
1395 |
break;
|
|
1396 |
case 5: case 6:// integer
|
|
1397 |
newFormat = NumberFormat.getIntegerInstance(locale);
|
|
1398 |
break;
|
|
1399 |
default: // pattern
|
|
1400 |
newFormat = new DecimalFormat(segments[3].toString(), DecimalFormatSymbols.getInstance(locale));
|
|
1401 |
break;
|
|
1402 |
}
|
|
1403 |
break;
|
|
1404 |
case 3: case 4: // date
|
|
1405 |
switch (findKeyword(segments[3].toString(), dateModifierList)) {
|
|
1406 |
case 0: // default
|
|
1407 |
newFormat = DateFormat.getDateInstance(DateFormat.DEFAULT, locale);
|
|
1408 |
break;
|
|
1409 |
case 1: case 2: // short
|
|
1410 |
newFormat = DateFormat.getDateInstance(DateFormat.SHORT, locale);
|
|
1411 |
break;
|
|
1412 |
case 3: case 4: // medium
|
|
1413 |
newFormat = DateFormat.getDateInstance(DateFormat.DEFAULT, locale);
|
|
1414 |
break;
|
|
1415 |
case 5: case 6: // long
|
|
1416 |
newFormat = DateFormat.getDateInstance(DateFormat.LONG, locale);
|
|
1417 |
break;
|
|
1418 |
case 7: case 8: // full
|
|
1419 |
newFormat = DateFormat.getDateInstance(DateFormat.FULL, locale);
|
|
1420 |
break;
|
|
1421 |
default:
|
|
1422 |
newFormat = new SimpleDateFormat(segments[3].toString(), locale);
|
|
1423 |
break;
|
|
1424 |
}
|
|
1425 |
break;
|
|
1426 |
case 5: case 6:// time
|
|
1427 |
switch (findKeyword(segments[3].toString(), dateModifierList)) {
|
|
1428 |
case 0: // default
|
|
1429 |
newFormat = DateFormat.getTimeInstance(DateFormat.DEFAULT, locale);
|
|
1430 |
break;
|
|
1431 |
case 1: case 2: // short
|
|
1432 |
newFormat = DateFormat.getTimeInstance(DateFormat.SHORT, locale);
|
|
1433 |
break;
|
|
1434 |
case 3: case 4: // medium
|
|
1435 |
newFormat = DateFormat.getTimeInstance(DateFormat.DEFAULT, locale);
|
|
1436 |
break;
|
|
1437 |
case 5: case 6: // long
|
|
1438 |
newFormat = DateFormat.getTimeInstance(DateFormat.LONG, locale);
|
|
1439 |
break;
|
|
1440 |
case 7: case 8: // full
|
|
1441 |
newFormat = DateFormat.getTimeInstance(DateFormat.FULL, locale);
|
|
1442 |
break;
|
|
1443 |
default:
|
|
1444 |
newFormat = new SimpleDateFormat(segments[3].toString(), locale);
|
|
1445 |
break;
|
|
1446 |
}
|
|
1447 |
break;
|
|
1448 |
case 7: case 8:// choice
|
|
1449 |
try {
|
|
1450 |
newFormat = new ChoiceFormat(segments[3].toString());
|
|
1451 |
} catch (Exception e) {
|
|
1452 |
maxOffset = oldMaxOffset;
|
|
1453 |
throw new IllegalArgumentException(
|
|
1454 |
"Choice Pattern incorrect");
|
|
1455 |
}
|
|
1456 |
break;
|
|
1457 |
default:
|
|
1458 |
maxOffset = oldMaxOffset;
|
|
1459 |
throw new IllegalArgumentException("unknown format type: " +
|
|
1460 |
segments[2].toString());
|
|
1461 |
}
|
|
1462 |
formats[offsetNumber] = newFormat;
|
|
1463 |
segments[1].setLength(0); // throw away other segments
|
|
1464 |
segments[2].setLength(0);
|
|
1465 |
segments[3].setLength(0);
|
|
1466 |
}
|
|
1467 |
|
|
1468 |
private static final int findKeyword(String s, String[] list) {
|
|
1469 |
s = s.trim().toLowerCase();
|
|
1470 |
for (int i = 0; i < list.length; ++i) {
|
|
1471 |
if (s.equals(list[i]))
|
|
1472 |
return i;
|
|
1473 |
}
|
|
1474 |
return -1;
|
|
1475 |
}
|
|
1476 |
|
|
1477 |
private static final void copyAndFixQuotes(
|
|
1478 |
String source, int start, int end, StringBuffer target) {
|
|
1479 |
for (int i = start; i < end; ++i) {
|
|
1480 |
char ch = source.charAt(i);
|
|
1481 |
if (ch == '{') {
|
|
1482 |
target.append("'{'");
|
|
1483 |
} else if (ch == '}') {
|
|
1484 |
target.append("'}'");
|
|
1485 |
} else if (ch == '\'') {
|
|
1486 |
target.append("''");
|
|
1487 |
} else {
|
|
1488 |
target.append(ch);
|
|
1489 |
}
|
|
1490 |
}
|
|
1491 |
}
|
|
1492 |
|
|
1493 |
/**
|
|
1494 |
* After reading an object from the input stream, do a simple verification
|
|
1495 |
* to maintain class invariants.
|
|
1496 |
* @throws InvalidObjectException if the objects read from the stream is invalid.
|
|
1497 |
*/
|
|
1498 |
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
|
|
1499 |
in.defaultReadObject();
|
|
1500 |
boolean isValid = maxOffset >= -1
|
|
1501 |
&& formats.length > maxOffset
|
|
1502 |
&& offsets.length > maxOffset
|
|
1503 |
&& argumentNumbers.length > maxOffset;
|
|
1504 |
if (isValid) {
|
|
1505 |
int lastOffset = pattern.length() + 1;
|
|
1506 |
for (int i = maxOffset; i >= 0; --i) {
|
|
1507 |
if ((offsets[i] < 0) || (offsets[i] > lastOffset)) {
|
|
1508 |
isValid = false;
|
|
1509 |
break;
|
|
1510 |
} else {
|
|
1511 |
lastOffset = offsets[i];
|
|
1512 |
}
|
|
1513 |
}
|
|
1514 |
}
|
|
1515 |
if (!isValid) {
|
|
1516 |
throw new InvalidObjectException("Could not reconstruct MessageFormat from corrupt stream.");
|
|
1517 |
}
|
|
1518 |
}
|
|
1519 |
}
|