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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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// XMLReaderAdapter.java - adapt an SAX2 XMLReader to a SAX1 Parser
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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: XMLReaderAdapter.java,v 1.3 2004/11/03 22:53:09 jsuttor Exp $
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package org.xml.sax.helpers;
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import java.io.IOException;
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import java.util.Locale;
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import org.xml.sax.Parser; // deprecated
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import org.xml.sax.Locator;
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import org.xml.sax.InputSource;
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import org.xml.sax.AttributeList; // deprecated
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import org.xml.sax.EntityResolver;
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import org.xml.sax.DTDHandler;
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import org.xml.sax.DocumentHandler; // deprecated
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import org.xml.sax.ErrorHandler;
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import org.xml.sax.SAXException;
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import org.xml.sax.XMLReader;
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import org.xml.sax.Attributes;
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import org.xml.sax.ContentHandler;
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import org.xml.sax.SAXNotSupportedException;
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/**
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* Adapt a SAX2 XMLReader as a SAX1 Parser.
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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 wraps a SAX2 {@link org.xml.sax.XMLReader XMLReader}
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* and makes it act as a SAX1 {@link org.xml.sax.Parser Parser}. The XMLReader
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* must support a true value for the
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* http://xml.org/sax/features/namespace-prefixes property or parsing will fail
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* with a {@link org.xml.sax.SAXException SAXException}; if the XMLReader
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* supports a false value for the http://xml.org/sax/features/namespaces
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* property, that will also be used to improve efficiency.</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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* @see org.xml.sax.Parser
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* @see org.xml.sax.XMLReader
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*/
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public class XMLReaderAdapter implements Parser, ContentHandler
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{
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////////////////////////////////////////////////////////////////////
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// Constructor.
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////////////////////////////////////////////////////////////////////
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/**
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* Create a new adapter.
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*
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* <p>Use the "org.xml.sax.driver" property to locate the SAX2
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* driver to embed.</p>
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*
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* @exception org.xml.sax.SAXException If the embedded driver
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* cannot be instantiated or if the
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* org.xml.sax.driver property is not specified.
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*/
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public XMLReaderAdapter ()
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throws SAXException
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{
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setup(XMLReaderFactory.createXMLReader());
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}
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/**
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* Create a new adapter.
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*
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* <p>Create a new adapter, wrapped around a SAX2 XMLReader.
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* The adapter will make the XMLReader act like a SAX1
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* Parser.</p>
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*
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* @param xmlReader The SAX2 XMLReader to wrap.
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* @exception java.lang.NullPointerException If the argument is null.
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*/
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public XMLReaderAdapter (XMLReader xmlReader)
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{
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setup(xmlReader);
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}
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/**
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* Internal setup.
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*
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* @param xmlReader The embedded XMLReader.
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*/
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private void setup (XMLReader xmlReader)
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{
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if (xmlReader == null) {
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throw new NullPointerException("XMLReader must not be null");
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}
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this.xmlReader = xmlReader;
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qAtts = new AttributesAdapter();
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}
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////////////////////////////////////////////////////////////////////
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// Implementation of org.xml.sax.Parser.
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////////////////////////////////////////////////////////////////////
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/**
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* Set the locale for error reporting.
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*
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* <p>This is not supported in SAX2, and will always throw
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* an exception.</p>
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*
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* @param locale the locale for error reporting.
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* @see org.xml.sax.Parser#setLocale
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* @exception org.xml.sax.SAXException Thrown unless overridden.
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*/
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public void setLocale (Locale locale)
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throws SAXException
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{
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throw new SAXNotSupportedException("setLocale not supported");
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}
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/**
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* Register the entity resolver.
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*
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* @param resolver The new resolver.
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* @see org.xml.sax.Parser#setEntityResolver
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*/
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public void setEntityResolver (EntityResolver resolver)
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{
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xmlReader.setEntityResolver(resolver);
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}
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/**
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* Register the DTD event handler.
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*
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* @param handler The new DTD event handler.
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* @see org.xml.sax.Parser#setDTDHandler
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*/
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public void setDTDHandler (DTDHandler handler)
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{
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xmlReader.setDTDHandler(handler);
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}
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/**
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* Register the SAX1 document event handler.
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*
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* <p>Note that the SAX1 document handler has no Namespace
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* support.</p>
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*
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* @param handler The new SAX1 document event handler.
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* @see org.xml.sax.Parser#setDocumentHandler
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*/
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public void setDocumentHandler (DocumentHandler handler)
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{
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documentHandler = handler;
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}
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/**
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* Register the error event handler.
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*
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* @param handler The new error event handler.
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* @see org.xml.sax.Parser#setErrorHandler
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*/
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public void setErrorHandler (ErrorHandler handler)
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{
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xmlReader.setErrorHandler(handler);
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}
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/**
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* Parse the document.
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*
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* <p>This method will throw an exception if the embedded
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* XMLReader does not support the
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* http://xml.org/sax/features/namespace-prefixes property.</p>
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*
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* @param systemId The absolute URL of the document.
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* @exception java.io.IOException If there is a problem reading
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* the raw content of the document.
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* @exception org.xml.sax.SAXException If there is a problem
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* processing the document.
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* @see #parse(org.xml.sax.InputSource)
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* @see org.xml.sax.Parser#parse(java.lang.String)
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*/
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public void parse (String systemId)
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throws IOException, SAXException
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{
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parse(new InputSource(systemId));
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}
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/**
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* Parse the document.
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*
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* <p>This method will throw an exception if the embedded
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* XMLReader does not support the
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* http://xml.org/sax/features/namespace-prefixes property.</p>
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*
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* @param input An input source for the document.
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* @exception java.io.IOException If there is a problem reading
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* the raw content of the document.
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* @exception org.xml.sax.SAXException If there is a problem
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* processing the document.
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* @see #parse(java.lang.String)
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* @see org.xml.sax.Parser#parse(org.xml.sax.InputSource)
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*/
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public void parse (InputSource input)
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throws IOException, SAXException
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{
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setupXMLReader();
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xmlReader.parse(input);
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}
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/**
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* Set up the XML reader.
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*/
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private void setupXMLReader ()
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throws SAXException
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{
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xmlReader.setFeature("http://xml.org/sax/features/namespace-prefixes", true);
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try {
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xmlReader.setFeature("http://xml.org/sax/features/namespaces",
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false);
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} catch (SAXException e) {
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// NO OP: it's just extra information, and we can ignore it
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}
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xmlReader.setContentHandler(this);
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}
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////////////////////////////////////////////////////////////////////
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// Implementation of org.xml.sax.ContentHandler.
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////////////////////////////////////////////////////////////////////
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/**
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* Set a document locator.
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*
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* @param locator The document locator.
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* @see org.xml.sax.ContentHandler#setDocumentLocator
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*/
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public void setDocumentLocator (Locator locator)
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{
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if (documentHandler != null)
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documentHandler.setDocumentLocator(locator);
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}
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/**
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* Start document event.
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*
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* @exception org.xml.sax.SAXException The client may raise a
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* processing exception.
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* @see org.xml.sax.ContentHandler#startDocument
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*/
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public void startDocument ()
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throws SAXException
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{
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if (documentHandler != null)
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documentHandler.startDocument();
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}
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/**
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* End document event.
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*
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* @exception org.xml.sax.SAXException The client may raise a
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* processing exception.
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* @see org.xml.sax.ContentHandler#endDocument
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*/
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public void endDocument ()
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throws SAXException
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{
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if (documentHandler != null)
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documentHandler.endDocument();
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}
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/**
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* Adapt a SAX2 start prefix mapping event.
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*
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* @param prefix The prefix being mapped.
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* @param uri The Namespace URI being mapped to.
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* @see org.xml.sax.ContentHandler#startPrefixMapping
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*/
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public void startPrefixMapping (String prefix, String uri)
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{
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}
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/**
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* Adapt a SAX2 end prefix mapping event.
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*
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* @param prefix The prefix being mapped.
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* @see org.xml.sax.ContentHandler#endPrefixMapping
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*/
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public void endPrefixMapping (String prefix)
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{
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}
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/**
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* Adapt a SAX2 start element event.
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*
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* @param uri The Namespace URI.
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* @param localName The Namespace local name.
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* @param qName The qualified (prefixed) name.
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* @param atts The SAX2 attributes.
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* @exception org.xml.sax.SAXException The client may raise a
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* processing exception.
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* @see org.xml.sax.ContentHandler#endDocument
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*/
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public void startElement (String uri, String localName,
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String qName, Attributes atts)
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throws SAXException
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{
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if (documentHandler != null) {
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qAtts.setAttributes(atts);
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documentHandler.startElement(qName, qAtts);
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}
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}
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/**
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* Adapt a SAX2 end element event.
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*
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* @param uri The Namespace URI.
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* @param localName The Namespace local name.
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* @param qName The qualified (prefixed) name.
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* @exception org.xml.sax.SAXException The client may raise a
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* processing exception.
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* @see org.xml.sax.ContentHandler#endElement
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*/
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public void endElement (String uri, String localName,
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String qName)
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throws SAXException
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{
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if (documentHandler != null)
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documentHandler.endElement(qName);
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}
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/**
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* Adapt a SAX2 characters event.
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*
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* @param ch An array of characters.
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* @param start The starting position in the array.
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* @param length The number of characters to use.
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* @exception org.xml.sax.SAXException The client may raise a
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* processing exception.
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* @see org.xml.sax.ContentHandler#characters
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*/
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public void characters (char ch[], int start, int length)
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throws SAXException
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{
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if (documentHandler != null)
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documentHandler.characters(ch, start, length);
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}
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/**
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* Adapt a SAX2 ignorable whitespace event.
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*
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* @param ch An array of characters.
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* @param start The starting position in the array.
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* @param length The number of characters to use.
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* @exception org.xml.sax.SAXException The client may raise a
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* processing exception.
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* @see org.xml.sax.ContentHandler#ignorableWhitespace
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*/
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public void ignorableWhitespace (char ch[], int start, int length)
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throws SAXException
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{
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if (documentHandler != null)
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documentHandler.ignorableWhitespace(ch, start, length);
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}
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/**
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* Adapt a SAX2 processing instruction event.
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*
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* @param target The processing instruction target.
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* @param data The remainder of the processing instruction
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* @exception org.xml.sax.SAXException The client may raise a
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* processing exception.
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* @see org.xml.sax.ContentHandler#processingInstruction
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*/
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public void processingInstruction (String target, String data)
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throws SAXException
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{
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if (documentHandler != null)
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documentHandler.processingInstruction(target, data);
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}
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/**
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* Adapt a SAX2 skipped entity event.
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*
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* @param name The name of the skipped entity.
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* @see org.xml.sax.ContentHandler#skippedEntity
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* @exception org.xml.sax.SAXException Throwable by subclasses.
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*/
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public void skippedEntity (String name)
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throws SAXException
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{
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}
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448 |
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449 |
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450 |
////////////////////////////////////////////////////////////////////
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451 |
// Internal state.
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452 |
////////////////////////////////////////////////////////////////////
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453 |
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|
454 |
XMLReader xmlReader;
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455 |
DocumentHandler documentHandler;
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|
456 |
AttributesAdapter qAtts;
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|
457 |
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458 |
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459 |
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460 |
////////////////////////////////////////////////////////////////////
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461 |
// Internal class.
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|
462 |
////////////////////////////////////////////////////////////////////
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463 |
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464 |
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465 |
/**
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|
466 |
* Internal class to wrap a SAX2 Attributes object for SAX1.
|
|
467 |
*/
|
|
468 |
final class AttributesAdapter implements AttributeList
|
|
469 |
{
|
|
470 |
AttributesAdapter ()
|
|
471 |
{
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|
472 |
}
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|
473 |
|
|
474 |
|
|
475 |
/**
|
|
476 |
* Set the embedded Attributes object.
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|
477 |
*
|
|
478 |
* @param The embedded SAX2 Attributes.
|
|
479 |
*/
|
|
480 |
void setAttributes (Attributes attributes)
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|
481 |
{
|
|
482 |
this.attributes = attributes;
|
|
483 |
}
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|
484 |
|
|
485 |
|
|
486 |
/**
|
|
487 |
* Return the number of attributes.
|
|
488 |
*
|
|
489 |
* @return The length of the attribute list.
|
|
490 |
* @see org.xml.sax.AttributeList#getLength
|
|
491 |
*/
|
|
492 |
public int getLength ()
|
|
493 |
{
|
|
494 |
return attributes.getLength();
|
|
495 |
}
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|
496 |
|
|
497 |
|
|
498 |
/**
|
|
499 |
* Return the qualified (prefixed) name of an attribute by position.
|
|
500 |
*
|
|
501 |
* @return The qualified name.
|
|
502 |
* @see org.xml.sax.AttributeList#getName
|
|
503 |
*/
|
|
504 |
public String getName (int i)
|
|
505 |
{
|
|
506 |
return attributes.getQName(i);
|
|
507 |
}
|
|
508 |
|
|
509 |
|
|
510 |
/**
|
|
511 |
* Return the type of an attribute by position.
|
|
512 |
*
|
|
513 |
* @return The type.
|
|
514 |
* @see org.xml.sax.AttributeList#getType(int)
|
|
515 |
*/
|
|
516 |
public String getType (int i)
|
|
517 |
{
|
|
518 |
return attributes.getType(i);
|
|
519 |
}
|
|
520 |
|
|
521 |
|
|
522 |
/**
|
|
523 |
* Return the value of an attribute by position.
|
|
524 |
*
|
|
525 |
* @return The value.
|
|
526 |
* @see org.xml.sax.AttributeList#getValue(int)
|
|
527 |
*/
|
|
528 |
public String getValue (int i)
|
|
529 |
{
|
|
530 |
return attributes.getValue(i);
|
|
531 |
}
|
|
532 |
|
|
533 |
|
|
534 |
/**
|
|
535 |
* Return the type of an attribute by qualified (prefixed) name.
|
|
536 |
*
|
|
537 |
* @return The type.
|
|
538 |
* @see org.xml.sax.AttributeList#getType(java.lang.String)
|
|
539 |
*/
|
|
540 |
public String getType (String qName)
|
|
541 |
{
|
|
542 |
return attributes.getType(qName);
|
|
543 |
}
|
|
544 |
|
|
545 |
|
|
546 |
/**
|
|
547 |
* Return the value of an attribute by qualified (prefixed) name.
|
|
548 |
*
|
|
549 |
* @return The value.
|
|
550 |
* @see org.xml.sax.AttributeList#getValue(java.lang.String)
|
|
551 |
*/
|
|
552 |
public String getValue (String qName)
|
|
553 |
{
|
|
554 |
return attributes.getValue(qName);
|
|
555 |
}
|
|
556 |
|
|
557 |
private Attributes attributes;
|
|
558 |
}
|
|
559 |
|
|
560 |
}
|
|
561 |
|
|
562 |
// end of XMLReaderAdapter.java
|