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/*
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* Copyright (c) 2000, 2005, Oracle and/or its affiliates. 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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// AttributesImpl.java - default implementation of Attributes.
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// http://www.saxproject.org
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// Written by David Megginson
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// NO WARRANTY! This class is in the public domain.
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// $Id: AttributesImpl.java,v 1.2 2004/11/03 22:53:08 jsuttor Exp $
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package org.xml.sax.helpers;
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import org.xml.sax.Attributes;
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/**
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* Default implementation of the Attributes interface.
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*
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* <blockquote>
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* <em>This module, both source code and documentation, is in the
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* Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
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* See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
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* for further information.
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* </blockquote>
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*
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* <p>This class provides a default implementation of the SAX2
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* {@link org.xml.sax.Attributes Attributes} interface, with the
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* addition of manipulators so that the list can be modified or
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* reused.</p>
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*
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* <p>There are two typical uses of this class:</p>
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*
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* <ol>
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* <li>to take a persistent snapshot of an Attributes object
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* in a {@link org.xml.sax.ContentHandler#startElement startElement} event; or</li>
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* <li>to construct or modify an Attributes object in a SAX2 driver or filter.</li>
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* </ol>
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*
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* <p>This class replaces the now-deprecated SAX1 {@link
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* org.xml.sax.helpers.AttributeListImpl AttributeListImpl}
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* class; in addition to supporting the updated Attributes
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* interface rather than the deprecated {@link org.xml.sax.AttributeList
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* AttributeList} interface, it also includes a much more efficient
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* implementation using a single array rather than a set of Vectors.</p>
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*
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* @since 1.4, SAX 2.0
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* @author David Megginson
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*/
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public class AttributesImpl implements Attributes
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{
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////////////////////////////////////////////////////////////////////
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// Constructors.
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////////////////////////////////////////////////////////////////////
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/**
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* Construct a new, empty AttributesImpl object.
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*/
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public AttributesImpl ()
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{
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length = 0;
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data = null;
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}
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/**
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* Copy an existing Attributes object.
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*
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* <p>This constructor is especially useful inside a
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* {@link org.xml.sax.ContentHandler#startElement startElement} event.</p>
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*
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* @param atts The existing Attributes object.
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*/
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public AttributesImpl (Attributes atts)
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{
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setAttributes(atts);
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}
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////////////////////////////////////////////////////////////////////
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// Implementation of org.xml.sax.Attributes.
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////////////////////////////////////////////////////////////////////
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/**
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* Return the number of attributes in the list.
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*
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* @return The number of attributes in the list.
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* @see org.xml.sax.Attributes#getLength
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*/
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public int getLength ()
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{
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return length;
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}
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/**
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* Return an attribute's Namespace URI.
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*
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* @param index The attribute's index (zero-based).
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* @return The Namespace URI, the empty string if none is
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* available, or null if the index is out of range.
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* @see org.xml.sax.Attributes#getURI
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*/
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public String getURI (int index)
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{
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if (index >= 0 && index < length) {
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return data[index*5];
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} else {
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return null;
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}
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}
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/**
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* Return an attribute's local name.
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*
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* @param index The attribute's index (zero-based).
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* @return The attribute's local name, the empty string if
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* none is available, or null if the index if out of range.
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* @see org.xml.sax.Attributes#getLocalName
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*/
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public String getLocalName (int index)
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{
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if (index >= 0 && index < length) {
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return data[index*5+1];
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} else {
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return null;
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}
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}
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/**
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* Return an attribute's qualified (prefixed) name.
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*
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* @param index The attribute's index (zero-based).
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* @return The attribute's qualified name, the empty string if
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* none is available, or null if the index is out of bounds.
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* @see org.xml.sax.Attributes#getQName
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*/
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public String getQName (int index)
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{
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if (index >= 0 && index < length) {
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return data[index*5+2];
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} else {
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return null;
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}
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}
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/**
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* Return an attribute's type by index.
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*
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* @param index The attribute's index (zero-based).
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* @return The attribute's type, "CDATA" if the type is unknown, or null
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* if the index is out of bounds.
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* @see org.xml.sax.Attributes#getType(int)
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*/
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public String getType (int index)
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{
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if (index >= 0 && index < length) {
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return data[index*5+3];
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} else {
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return null;
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}
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}
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/**
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* Return an attribute's value by index.
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*
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* @param index The attribute's index (zero-based).
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* @return The attribute's value or null if the index is out of bounds.
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* @see org.xml.sax.Attributes#getValue(int)
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*/
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public String getValue (int index)
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{
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if (index >= 0 && index < length) {
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return data[index*5+4];
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} else {
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return null;
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}
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}
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/**
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* Look up an attribute's index by Namespace name.
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*
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* <p>In many cases, it will be more efficient to look up the name once and
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* use the index query methods rather than using the name query methods
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* repeatedly.</p>
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*
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* @param uri The attribute's Namespace URI, or the empty
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* string if none is available.
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* @param localName The attribute's local name.
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* @return The attribute's index, or -1 if none matches.
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* @see org.xml.sax.Attributes#getIndex(java.lang.String,java.lang.String)
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*/
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public int getIndex (String uri, String localName)
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{
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int max = length * 5;
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for (int i = 0; i < max; i += 5) {
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if (data[i].equals(uri) && data[i+1].equals(localName)) {
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return i / 5;
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}
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}
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return -1;
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}
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/**
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* Look up an attribute's index by qualified (prefixed) name.
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*
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* @param qName The qualified name.
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* @return The attribute's index, or -1 if none matches.
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* @see org.xml.sax.Attributes#getIndex(java.lang.String)
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*/
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public int getIndex (String qName)
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{
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int max = length * 5;
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for (int i = 0; i < max; i += 5) {
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if (data[i+2].equals(qName)) {
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return i / 5;
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}
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}
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return -1;
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}
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/**
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* Look up an attribute's type by Namespace-qualified name.
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*
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* @param uri The Namespace URI, or the empty string for a name
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* with no explicit Namespace URI.
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* @param localName The local name.
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* @return The attribute's type, or null if there is no
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* matching attribute.
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* @see org.xml.sax.Attributes#getType(java.lang.String,java.lang.String)
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*/
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public String getType (String uri, String localName)
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{
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int max = length * 5;
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for (int i = 0; i < max; i += 5) {
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if (data[i].equals(uri) && data[i+1].equals(localName)) {
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return data[i+3];
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}
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}
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return null;
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}
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/**
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* Look up an attribute's type by qualified (prefixed) name.
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*
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* @param qName The qualified name.
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* @return The attribute's type, or null if there is no
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* matching attribute.
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* @see org.xml.sax.Attributes#getType(java.lang.String)
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*/
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public String getType (String qName)
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{
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int max = length * 5;
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for (int i = 0; i < max; i += 5) {
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if (data[i+2].equals(qName)) {
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return data[i+3];
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}
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}
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return null;
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}
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/**
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* Look up an attribute's value by Namespace-qualified name.
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*
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* @param uri The Namespace URI, or the empty string for a name
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* with no explicit Namespace URI.
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* @param localName The local name.
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* @return The attribute's value, or null if there is no
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* matching attribute.
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* @see org.xml.sax.Attributes#getValue(java.lang.String,java.lang.String)
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*/
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public String getValue (String uri, String localName)
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{
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int max = length * 5;
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for (int i = 0; i < max; i += 5) {
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if (data[i].equals(uri) && data[i+1].equals(localName)) {
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return data[i+4];
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}
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}
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return null;
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}
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/**
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* Look up an attribute's value by qualified (prefixed) name.
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*
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* @param qName The qualified name.
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* @return The attribute's value, or null if there is no
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* matching attribute.
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* @see org.xml.sax.Attributes#getValue(java.lang.String)
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*/
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public String getValue (String qName)
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{
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int max = length * 5;
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for (int i = 0; i < max; i += 5) {
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if (data[i+2].equals(qName)) {
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return data[i+4];
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}
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}
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return null;
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}
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////////////////////////////////////////////////////////////////////
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// Manipulators.
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////////////////////////////////////////////////////////////////////
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/**
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* Clear the attribute list for reuse.
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*
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* <p>Note that little memory is freed by this call:
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* the current array is kept so it can be
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* reused.</p>
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*/
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public void clear ()
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{
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if (data != null) {
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for (int i = 0; i < (length * 5); i++)
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data [i] = null;
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}
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length = 0;
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}
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/**
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* Copy an entire Attributes object.
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*
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* <p>It may be more efficient to reuse an existing object
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* rather than constantly allocating new ones.</p>
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*
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* @param atts The attributes to copy.
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*/
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public void setAttributes (Attributes atts)
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{
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clear();
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length = atts.getLength();
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if (length > 0) {
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data = new String[length*5];
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for (int i = 0; i < length; i++) {
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data[i*5] = atts.getURI(i);
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data[i*5+1] = atts.getLocalName(i);
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data[i*5+2] = atts.getQName(i);
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data[i*5+3] = atts.getType(i);
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data[i*5+4] = atts.getValue(i);
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}
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}
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}
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/**
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* Add an attribute to the end of the list.
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*
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* <p>For the sake of speed, this method does no checking
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* to see if the attribute is already in the list: that is
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* the responsibility of the application.</p>
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*
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* @param uri The Namespace URI, or the empty string if
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* none is available or Namespace processing is not
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* being performed.
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* @param localName The local name, or the empty string if
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* Namespace processing is not being performed.
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* @param qName The qualified (prefixed) name, or the empty string
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* if qualified names are not available.
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* @param type The attribute type as a string.
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* @param value The attribute value.
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*/
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public void addAttribute (String uri, String localName, String qName,
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String type, String value)
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{
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ensureCapacity(length+1);
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data[length*5] = uri;
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data[length*5+1] = localName;
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data[length*5+2] = qName;
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data[length*5+3] = type;
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data[length*5+4] = value;
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length++;
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}
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/**
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* Set an attribute in the list.
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*
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* <p>For the sake of speed, this method does no checking
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* for name conflicts or well-formedness: such checks are the
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* responsibility of the application.</p>
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*
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* @param index The index of the attribute (zero-based).
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* @param uri The Namespace URI, or the empty string if
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* none is available or Namespace processing is not
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* being performed.
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* @param localName The local name, or the empty string if
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* Namespace processing is not being performed.
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* @param qName The qualified name, or the empty string
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* if qualified names are not available.
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* @param type The attribute type as a string.
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* @param value The attribute value.
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* @exception java.lang.ArrayIndexOutOfBoundsException When the
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434 |
* supplied index does not point to an attribute
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* in the list.
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*/
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437 |
public void setAttribute (int index, String uri, String localName,
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|
438 |
String qName, String type, String value)
|
|
439 |
{
|
|
440 |
if (index >= 0 && index < length) {
|
|
441 |
data[index*5] = uri;
|
|
442 |
data[index*5+1] = localName;
|
|
443 |
data[index*5+2] = qName;
|
|
444 |
data[index*5+3] = type;
|
|
445 |
data[index*5+4] = value;
|
|
446 |
} else {
|
|
447 |
badIndex(index);
|
|
448 |
}
|
|
449 |
}
|
|
450 |
|
|
451 |
|
|
452 |
/**
|
|
453 |
* Remove an attribute from the list.
|
|
454 |
*
|
|
455 |
* @param index The index of the attribute (zero-based).
|
|
456 |
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
|
457 |
* supplied index does not point to an attribute
|
|
458 |
* in the list.
|
|
459 |
*/
|
|
460 |
public void removeAttribute (int index)
|
|
461 |
{
|
|
462 |
if (index >= 0 && index < length) {
|
|
463 |
if (index < length - 1) {
|
|
464 |
System.arraycopy(data, (index+1)*5, data, index*5,
|
|
465 |
(length-index-1)*5);
|
|
466 |
}
|
|
467 |
index = (length - 1) * 5;
|
|
468 |
data [index++] = null;
|
|
469 |
data [index++] = null;
|
|
470 |
data [index++] = null;
|
|
471 |
data [index++] = null;
|
|
472 |
data [index] = null;
|
|
473 |
length--;
|
|
474 |
} else {
|
|
475 |
badIndex(index);
|
|
476 |
}
|
|
477 |
}
|
|
478 |
|
|
479 |
|
|
480 |
/**
|
|
481 |
* Set the Namespace URI of a specific attribute.
|
|
482 |
*
|
|
483 |
* @param index The index of the attribute (zero-based).
|
|
484 |
* @param uri The attribute's Namespace URI, or the empty
|
|
485 |
* string for none.
|
|
486 |
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
|
487 |
* supplied index does not point to an attribute
|
|
488 |
* in the list.
|
|
489 |
*/
|
|
490 |
public void setURI (int index, String uri)
|
|
491 |
{
|
|
492 |
if (index >= 0 && index < length) {
|
|
493 |
data[index*5] = uri;
|
|
494 |
} else {
|
|
495 |
badIndex(index);
|
|
496 |
}
|
|
497 |
}
|
|
498 |
|
|
499 |
|
|
500 |
/**
|
|
501 |
* Set the local name of a specific attribute.
|
|
502 |
*
|
|
503 |
* @param index The index of the attribute (zero-based).
|
|
504 |
* @param localName The attribute's local name, or the empty
|
|
505 |
* string for none.
|
|
506 |
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
|
507 |
* supplied index does not point to an attribute
|
|
508 |
* in the list.
|
|
509 |
*/
|
|
510 |
public void setLocalName (int index, String localName)
|
|
511 |
{
|
|
512 |
if (index >= 0 && index < length) {
|
|
513 |
data[index*5+1] = localName;
|
|
514 |
} else {
|
|
515 |
badIndex(index);
|
|
516 |
}
|
|
517 |
}
|
|
518 |
|
|
519 |
|
|
520 |
/**
|
|
521 |
* Set the qualified name of a specific attribute.
|
|
522 |
*
|
|
523 |
* @param index The index of the attribute (zero-based).
|
|
524 |
* @param qName The attribute's qualified name, or the empty
|
|
525 |
* string for none.
|
|
526 |
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
|
527 |
* supplied index does not point to an attribute
|
|
528 |
* in the list.
|
|
529 |
*/
|
|
530 |
public void setQName (int index, String qName)
|
|
531 |
{
|
|
532 |
if (index >= 0 && index < length) {
|
|
533 |
data[index*5+2] = qName;
|
|
534 |
} else {
|
|
535 |
badIndex(index);
|
|
536 |
}
|
|
537 |
}
|
|
538 |
|
|
539 |
|
|
540 |
/**
|
|
541 |
* Set the type of a specific attribute.
|
|
542 |
*
|
|
543 |
* @param index The index of the attribute (zero-based).
|
|
544 |
* @param type The attribute's type.
|
|
545 |
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
|
546 |
* supplied index does not point to an attribute
|
|
547 |
* in the list.
|
|
548 |
*/
|
|
549 |
public void setType (int index, String type)
|
|
550 |
{
|
|
551 |
if (index >= 0 && index < length) {
|
|
552 |
data[index*5+3] = type;
|
|
553 |
} else {
|
|
554 |
badIndex(index);
|
|
555 |
}
|
|
556 |
}
|
|
557 |
|
|
558 |
|
|
559 |
/**
|
|
560 |
* Set the value of a specific attribute.
|
|
561 |
*
|
|
562 |
* @param index The index of the attribute (zero-based).
|
|
563 |
* @param value The attribute's value.
|
|
564 |
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
|
565 |
* supplied index does not point to an attribute
|
|
566 |
* in the list.
|
|
567 |
*/
|
|
568 |
public void setValue (int index, String value)
|
|
569 |
{
|
|
570 |
if (index >= 0 && index < length) {
|
|
571 |
data[index*5+4] = value;
|
|
572 |
} else {
|
|
573 |
badIndex(index);
|
|
574 |
}
|
|
575 |
}
|
|
576 |
|
|
577 |
|
|
578 |
|
|
579 |
////////////////////////////////////////////////////////////////////
|
|
580 |
// Internal methods.
|
|
581 |
////////////////////////////////////////////////////////////////////
|
|
582 |
|
|
583 |
|
|
584 |
/**
|
|
585 |
* Ensure the internal array's capacity.
|
|
586 |
*
|
|
587 |
* @param n The minimum number of attributes that the array must
|
|
588 |
* be able to hold.
|
|
589 |
*/
|
|
590 |
private void ensureCapacity (int n) {
|
|
591 |
if (n <= 0) {
|
|
592 |
return;
|
|
593 |
}
|
|
594 |
int max;
|
|
595 |
if (data == null || data.length == 0) {
|
|
596 |
max = 25;
|
|
597 |
}
|
|
598 |
else if (data.length >= n * 5) {
|
|
599 |
return;
|
|
600 |
}
|
|
601 |
else {
|
|
602 |
max = data.length;
|
|
603 |
}
|
|
604 |
while (max < n * 5) {
|
|
605 |
max *= 2;
|
|
606 |
}
|
|
607 |
|
|
608 |
String newData[] = new String[max];
|
|
609 |
if (length > 0) {
|
|
610 |
System.arraycopy(data, 0, newData, 0, length*5);
|
|
611 |
}
|
|
612 |
data = newData;
|
|
613 |
}
|
|
614 |
|
|
615 |
|
|
616 |
/**
|
|
617 |
* Report a bad array index in a manipulator.
|
|
618 |
*
|
|
619 |
* @param index The index to report.
|
|
620 |
* @exception java.lang.ArrayIndexOutOfBoundsException Always.
|
|
621 |
*/
|
|
622 |
private void badIndex (int index)
|
|
623 |
throws ArrayIndexOutOfBoundsException
|
|
624 |
{
|
|
625 |
String msg =
|
|
626 |
"Attempt to modify attribute at illegal index: " + index;
|
|
627 |
throw new ArrayIndexOutOfBoundsException(msg);
|
|
628 |
}
|
|
629 |
|
|
630 |
|
|
631 |
|
|
632 |
////////////////////////////////////////////////////////////////////
|
|
633 |
// Internal state.
|
|
634 |
////////////////////////////////////////////////////////////////////
|
|
635 |
|
|
636 |
int length;
|
|
637 |
String data [];
|
|
638 |
|
|
639 |
}
|
|
640 |
|
|
641 |
// end of AttributesImpl.java
|