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xml-commons Resolver Source Code Files
xml-commons Resolver Source Code Files are provided in the source package file, xml-commons-resolver-1.2-fyi.zip.
You can download xml-commons-resolver-1.2-fyi.zip as described in the previous tutorial and go to the "src/" sub-folder to view Source Code files.
You can also browse xml-commons Resolver Source Code files below:
✍: FYIcenter
⏎ org/apache/xml/resolver/readers/SAXCatalogReader.java
// SAXCatalogReader.java - Read XML Catalog files /* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.xml.resolver.readers; import java.util.Hashtable; import java.io.IOException; import java.io.FileNotFoundException; import java.io.InputStream; import java.net.URL; import java.net.URLConnection; import java.net.MalformedURLException; import java.net.UnknownHostException; import javax.xml.parsers.ParserConfigurationException; import javax.xml.parsers.SAXParserFactory; import javax.xml.parsers.SAXParser; import org.xml.sax.AttributeList; import org.xml.sax.Attributes; import org.xml.sax.ContentHandler; import org.xml.sax.DocumentHandler; import org.xml.sax.EntityResolver; import org.xml.sax.InputSource; import org.xml.sax.Locator; import org.xml.sax.Parser; import org.xml.sax.SAXException; import org.apache.xml.resolver.Catalog; import org.apache.xml.resolver.CatalogManager; import org.apache.xml.resolver.CatalogException; import org.apache.xml.resolver.readers.CatalogReader; import org.apache.xml.resolver.helpers.Debug; /** * A SAX-based CatalogReader. * * <p>This class is used to read XML Catalogs using the SAX. This reader * has an advantage over the DOM-based reader in that it functions on * the stream of SAX events. It has the disadvantage * that it cannot look around in the tree.</p> * * <p>Since the choice of CatalogReaders (in the InputStream case) can only * be made on the basis of MIME type, the following problem occurs: only * one CatalogReader can exist for all XML mime types. In order to get * around this problem, the SAXCatalogReader relies on a set of external * CatalogParsers to actually build the catalog.</p> * * <p>The selection of CatalogParsers is made on the basis of the QName * of the root element of the document.</p> * * @see Catalog * @see CatalogReader * @see SAXCatalogReader * @see TextCatalogReader * @see DOMCatalogParser * * @author Norman Walsh * <a href="mailto:Norman.Walsh@Sun.COM">Norman.Walsh@Sun.COM</a> * * @version 1.0 */ public class SAXCatalogReader implements CatalogReader, ContentHandler, DocumentHandler { /** The SAX Parser Factory */ protected SAXParserFactory parserFactory = null; /** The SAX Parser Class */ protected String parserClass = null; /** * Mapping table from QNames to CatalogParser classes. * * <p>Each key in this hash table has the form "elementname" * or "{namespaceuri}elementname". The former is used if the * namespace URI is null.</p> */ protected Hashtable namespaceMap = new Hashtable(); /** The parser in use for the current catalog. */ private SAXCatalogParser saxParser = null; /** Set if something goes horribly wrong. It allows the class to * ignore the rest of the events that are received. */ private boolean abandonHope = false; /** If set, used for loading classes by reflection */ private ClassLoader loader = null; /** The Catalog that we're working for. */ private Catalog catalog; /** Set the XML SAX Parser Factory. */ public void setParserFactory(SAXParserFactory parserFactory) { this.parserFactory = parserFactory; } /** Set the XML SAX Parser Class */ public void setParserClass(String parserClass) { this.parserClass = parserClass; } /** Get the parser factory currently in use. */ public SAXParserFactory getParserFactory() { return parserFactory; } /** Get the parser class currently in use. */ public String getParserClass() { return parserClass; } /** * Set the class loader to use when loading class by reflection. If not set, * the the class loader used to load this class is used. */ public void setClassLoader(ClassLoader loader) { this.loader = loader; } /** The debug class to use for this reader. * * This is a bit of a hack. Anyway, whenever we read for a catalog, * we extract the debug object * from the catalog's manager so that we can use it to print messages. * * In production, we don't really expect any messages so it doesn't * really matter. But it's still a bit of a hack. */ protected Debug debug = CatalogManager.getStaticManager().debug; /** The constructor */ public SAXCatalogReader() { parserFactory = null; parserClass = null; } /** The constructor */ public SAXCatalogReader(SAXParserFactory parserFactory) { this.parserFactory = parserFactory; } /** The constructor */ public SAXCatalogReader(String parserClass) { this.parserClass = parserClass; } /** * Set the SAXCatalogParser class for the given namespace/root * element type. */ public void setCatalogParser(String namespaceURI, String rootElement, String parserClass) { namespaceURI = namespaceURI != null ? namespaceURI.trim() : ""; namespaceMap.put("{"+namespaceURI+"}"+rootElement, parserClass); } /** * Get the SAXCatalogParser class for the given namespace/root * element type. */ public String getCatalogParser(String namespaceURI, String rootElement) { namespaceURI = namespaceURI != null ? namespaceURI.trim() : ""; return (String) namespaceMap.get("{"+namespaceURI+"}"+rootElement); } /** * Parse an XML Catalog file. * * @param catalog The catalog to which this catalog file belongs * @param fileUrl The URL or filename of the catalog file to process * * @throws MalformedURLException Improper fileUrl * @throws IOException Error reading catalog file */ public void readCatalog(Catalog catalog, String fileUrl) throws MalformedURLException, IOException, CatalogException { URL url = null; try { url = new URL(fileUrl); } catch (MalformedURLException e) { url = new URL("file:///" + fileUrl); } debug = catalog.getCatalogManager().debug; try { URLConnection urlCon = url.openConnection(); readCatalog(catalog, urlCon.getInputStream()); } catch (FileNotFoundException e) { catalog.getCatalogManager().debug.message(1, "Failed to load catalog, file not found", url.toString()); } } /** * Parse an XML Catalog stream. * * @param catalog The catalog to which this catalog file belongs * @param is The input stream from which the catalog will be read * * @throws MalformedURLException Improper fileUrl * @throws IOException Error reading catalog file * @throws CatalogException A Catalog exception */ public void readCatalog(Catalog catalog, InputStream is) throws IOException, CatalogException { // Create an instance of the parser if (parserFactory == null && parserClass == null) { debug.message(1, "Cannot read SAX catalog without a parser"); throw new CatalogException(CatalogException.UNPARSEABLE); } debug = catalog.getCatalogManager().debug; EntityResolver bResolver = catalog.getCatalogManager().getBootstrapResolver(); this.catalog = catalog; try { if (parserFactory != null) { SAXParser parser = parserFactory.newSAXParser(); SAXParserHandler spHandler = new SAXParserHandler(); spHandler.setContentHandler(this); if (bResolver != null) { spHandler.setEntityResolver(bResolver); } parser.parse(new InputSource(is), spHandler); } else { Parser parser = (Parser) Class.forName(parserClass, true, loader != null ? loader : this.getClass().getClassLoader()).newInstance(); parser.setDocumentHandler(this); if (bResolver != null) { parser.setEntityResolver(bResolver); } parser.parse(new InputSource(is)); } } catch (ClassNotFoundException cnfe) { throw new CatalogException(CatalogException.UNPARSEABLE); } catch (IllegalAccessException iae) { throw new CatalogException(CatalogException.UNPARSEABLE); } catch (InstantiationException ie) { throw new CatalogException(CatalogException.UNPARSEABLE); } catch (ParserConfigurationException pce) { throw new CatalogException(CatalogException.UNKNOWN_FORMAT); } catch (SAXException se) { Exception e = se.getException(); // FIXME: there must be a better way UnknownHostException uhe = new UnknownHostException(); FileNotFoundException fnfe = new FileNotFoundException(); if (e != null) { if (e.getClass() == uhe.getClass()) { throw new CatalogException(CatalogException.PARSE_FAILED, e.toString()); } else if (e.getClass() == fnfe.getClass()) { throw new CatalogException(CatalogException.PARSE_FAILED, e.toString()); } } throw new CatalogException(se); } } // ---------------------------------------------------------------------- // Implement the SAX ContentHandler interface /** The SAX <code>setDocumentLocator</code> method. Does nothing. */ public void setDocumentLocator (Locator locator) { if (saxParser != null) { saxParser.setDocumentLocator(locator); } } /** The SAX <code>startDocument</code> method. Does nothing. */ public void startDocument () throws SAXException { saxParser = null; abandonHope = false; return; } /** The SAX <code>endDocument</code> method. Does nothing. */ public void endDocument ()throws SAXException { if (saxParser != null) { saxParser.endDocument(); } } /** * The SAX <code>startElement</code> method. * * <p>The catalog parser is selected based on the namespace of the * first element encountered in the catalog.</p> */ public void startElement (String name, AttributeList atts) throws SAXException { if (abandonHope) { return; } if (saxParser == null) { String prefix = ""; if (name.indexOf(':') > 0) { prefix = name.substring(0, name.indexOf(':')); } String localName = name; if (localName.indexOf(':') > 0) { localName = localName.substring(localName.indexOf(':')+1); } String namespaceURI = null; if (prefix.equals("")) { namespaceURI = atts.getValue("xmlns"); } else { namespaceURI = atts.getValue("xmlns:" + prefix); } String saxParserClass = getCatalogParser(namespaceURI, localName); if (saxParserClass == null) { abandonHope = true; if (namespaceURI == null) { debug.message(2, "No Catalog parser for " + name); } else { debug.message(2, "No Catalog parser for " + "{" + namespaceURI + "}" + name); } return; } try { saxParser = (SAXCatalogParser) Class.forName(saxParserClass, true, loader != null ? loader : this.getClass().getClassLoader()).newInstance(); saxParser.setCatalog(catalog); saxParser.startDocument(); saxParser.startElement(name, atts); } catch (ClassNotFoundException cnfe) { saxParser = null; abandonHope = true; debug.message(2, cnfe.toString()); } catch (InstantiationException ie) { saxParser = null; abandonHope = true; debug.message(2, ie.toString()); } catch (IllegalAccessException iae) { saxParser = null; abandonHope = true; debug.message(2, iae.toString()); } catch (ClassCastException cce ) { saxParser = null; abandonHope = true; debug.message(2, cce.toString()); } } else { saxParser.startElement(name, atts); } } /** * The SAX2 <code>startElement</code> method. * * <p>The catalog parser is selected based on the namespace of the * first element encountered in the catalog.</p> */ public void startElement (String namespaceURI, String localName, String qName, Attributes atts) throws SAXException { if (abandonHope) { return; } if (saxParser == null) { String saxParserClass = getCatalogParser(namespaceURI, localName); if (saxParserClass == null) { abandonHope = true; if (namespaceURI == null) { debug.message(2, "No Catalog parser for " + localName); } else { debug.message(2, "No Catalog parser for " + "{" + namespaceURI + "}" + localName); } return; } try { saxParser = (SAXCatalogParser) Class.forName(saxParserClass, true, loader != null ? loader : this.getClass().getClassLoader()).newInstance(); saxParser.setCatalog(catalog); saxParser.startDocument(); saxParser.startElement(namespaceURI, localName, qName, atts); } catch (ClassNotFoundException cnfe) { saxParser = null; abandonHope = true; debug.message(2, cnfe.toString()); } catch (InstantiationException ie) { saxParser = null; abandonHope = true; debug.message(2, ie.toString()); } catch (IllegalAccessException iae) { saxParser = null; abandonHope = true; debug.message(2, iae.toString()); } catch (ClassCastException cce ) { saxParser = null; abandonHope = true; debug.message(2, cce.toString()); } } else { saxParser.startElement(namespaceURI, localName, qName, atts); } } /** The SAX <code>endElement</code> method. Does nothing. */ public void endElement (String name) throws SAXException { if (saxParser != null) { saxParser.endElement(name); } } /** The SAX2 <code>endElement</code> method. Does nothing. */ public void endElement (String namespaceURI, String localName, String qName) throws SAXException { if (saxParser != null) { saxParser.endElement(namespaceURI, localName, qName); } } /** The SAX <code>characters</code> method. Does nothing. */ public void characters (char ch[], int start, int length) throws SAXException { if (saxParser != null) { saxParser.characters(ch, start, length); } } /** The SAX <code>ignorableWhitespace</code> method. Does nothing. */ public void ignorableWhitespace (char ch[], int start, int length) throws SAXException { if (saxParser != null) { saxParser.ignorableWhitespace(ch, start, length); } } /** The SAX <code>processingInstruction</code> method. Does nothing. */ public void processingInstruction (String target, String data) throws SAXException { if (saxParser != null) { saxParser.processingInstruction(target, data); } } /** The SAX <code>startPrefixMapping</code> method. Does nothing. */ public void startPrefixMapping (String prefix, String uri) throws SAXException { if (saxParser != null) { saxParser.startPrefixMapping (prefix, uri); } } /** The SAX <code>endPrefixMapping</code> method. Does nothing. */ public void endPrefixMapping (String prefix) throws SAXException { if (saxParser != null) { saxParser.endPrefixMapping (prefix); } } /** The SAX <code>skippedentity</code> method. Does nothing. */ public void skippedEntity (String name) throws SAXException { if (saxParser != null) { saxParser.skippedEntity(name); } } }
⏎ org/apache/xml/resolver/readers/SAXCatalogReader.java
Or download all of them as a single archive file:
File name: xml-commons-resolver-1.2-fyi.zip File size: 101319 bytes Release date: 2006-11-20 Download
⇒ FAQ for Apache Xerces XML Parser
⇐ What Is in xml-commons-resolver-1.2.zip
2016-06-15, 24432👍, 1💬
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