package org.xmldb.xupdate.lexus;
/*
* The XML:DB Initiative Software License, Version 1.0
*
*
* Copyright (c) 2000-2003 The XML:DB Initiative. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* XML:DB Initiative (http://www.xmldb.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The name "XML:DB Initiative" must not be used to endorse or
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*
* 5. Products derived from this software may not be called "XML:DB",
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* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the XML:DB Initiative. For more information
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import org.w3c.dom.Node;
import org.w3c.dom.traversal.NodeFilter;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.ParserAdapter;
import org.xmldb.common.xml.queries.XUpdateQuery;
import org.xmldb.xupdate.lexus.commands.CommandConstants;
import org.xmldb.xupdate.lexus.commands.CommandObject;
import org.xmldb.xupdate.lexus.commands.DefaultCommand;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.StringReader;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Vector;
/**
* <b>Note:</b>
* If the DOM implementation you use does not support DOM-Level 2, some
* features will not work properly. XUpdate uses the method
* <code>getNamespaceURI</code> of the <code>org.w3c.dom.Node</code>
* interface. This method returns <code>null</code> if the current Node
* has no namespace. Your DOM implementation should implement this method
* and alway return null, then XUpdate should work better. Nevertheless
* you cannot use some features. Inserting elements and attributes just
* works, if you omit the optional attribute called namespace. For more
* detail about XUpdate look at the
* <a href="http://www.xmldb.org/xupdate/xupdate-wd.html">XUpdate Working Draft</a>.
* @version $Revision: 1.10 $ $Date: 2003/06/11 13:22:04 $
* @author <a href="http://www.smb-tec.com">SMB</a>
* @author <a href="mailto:tdean@gr.com">Timothy M. Dean</a>
*/
public class XUpdateQueryImpl implements XUpdateQuery {
org.apache.log4j.Category log = org.apache.log4j.Category.getInstance(XUpdateQueryImpl.class);
/* The XUpdate namespace-uri. */
public static final String NAMESPACE_URI = "http://www.xmldb.org/xupdate";
/* Another representation of the query. It is faster than many String comparisons.*/
private Vector[] query = null;
/* Representation of commands and instructions as IDs. */
private CommandConstants commandConstants = null;
/* */
protected Node namespace = null;
/* */
protected HashMap namespaces = null;
/**
*
*/
public XUpdateQueryImpl() {
commandConstants = new CommandConstants();
}
/**
*
*/
public void setQString(String queryString) throws SAXException {
XUpdateQueryParser xuParser = new XUpdateQueryParser(commandConstants);
try {
SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
ParserAdapter saxParser = new ParserAdapter(parser.getParser());
saxParser.setContentHandler(xuParser);
saxParser.parse(new InputSource(new StringReader(queryString)));
} catch (Exception e) {
throw new SAXException(e.getMessage());
}
namespaces = xuParser.getNamespaceMappings();
query = xuParser.getCachedQuery();
if (query[0].size() == 0) {
throw new SAXException("query contains no XUpdateOperation !");
}
}
/**
*
*/
public void setNamespace(Node node) {
namespace = node;
}
/**
*
*/
public void setNodeFilter(NodeFilter filter) {
filter = filter;
}
/**
*
*/
public void execute(Node contextNode) throws Exception {
//log.error(".execute(): Starting XUpdate ...");
CommandObject currentCommand = new DefaultCommand(contextNode);
Enumeration commands = query[0].elements();
Enumeration attributes = query[1].elements();
Enumeration characters = query[2].elements();
while (commands.hasMoreElements()) {
//log.error(".execute(): Commands ...");
int id = ((Integer) commands.nextElement()).intValue();
if (id > 0) {
//log.error(".execute(): switch(id) ...");
switch (id) {
case CommandConstants.ATTRIBUTES:
currentCommand.submitAttributes((Hashtable) attributes.nextElement());
break;
case CommandConstants.CHARACTERS:
currentCommand.submitCharacters((String) characters.nextElement());
break;
default:
if (!currentCommand.submitInstruction(id)) {
commandConstants.setContextNode(contextNode);
currentCommand = commandConstants.commandForID(id);
if (currentCommand == null) {
throw new Exception("operation can not have any XUpdate-instruction !");
}
currentCommand.reset();
}
}
} else {
//log.error(".execute(): else ...");
if (!currentCommand.executeInstruction()) {
contextNode = currentCommand.execute();
currentCommand = new DefaultCommand(contextNode);
}
}
}
//log.error(".execute(): Ending XUpdate ...");
}
/**
* Main-method. You can manually test your update operations.
*/
public static void main(String args[]) throws Exception {
if (args.length == 0) {
System.err.println("usage: java org.xmldb.xupdate.lexus.XUpdateQueryImpl update document");
System.err.println(" update - filename of the file which contains XUpdate operations");
System.err.println(" document - filename of the file which contains the content to update");
System.exit(0);
}
// parse the update file
File file = new File(args[0]);
BufferedReader br = new BufferedReader(new FileReader(file));
char[] characters = new char[new Long(file.length()).intValue()];
br.read(characters, 0, new Long(file.length()).intValue());
String queryStr = new String(characters);
// parse the document file
Node myDocument = null;
DocumentBuilderFactory parserFactory = DocumentBuilderFactory.newInstance();
parserFactory.setValidating(false);
parserFactory.setNamespaceAware(true);
parserFactory.setIgnoringElementContentWhitespace(true);
DocumentBuilder builder = parserFactory.newDocumentBuilder();
myDocument = builder.parse(args[1]);
System.setProperty("org.xmldb.common.xml.queries.XPathQueryFactory",
"org.xmldb.common.xml.queries.xalan2.XPathQueryFactoryImpl");
// update the document and print time used for the updates
XUpdateQuery xq = new XUpdateQueryImpl();
System.err.println("Starting updates...");
long timeStart = System.currentTimeMillis();
xq.setQString(queryStr);
xq.execute(myDocument);
long timeEnd = System.currentTimeMillis();
System.err.println("Updates done in " + (timeEnd - timeStart) + " ms ...");
// <michi>
java.io.StringWriter writer = new java.io.StringWriter();
org.apache.xml.serialize.OutputFormat OutFormat = new org.apache.xml.serialize.OutputFormat("xml", "UTF-8", true);
org.apache.xml.serialize.XMLSerializer serializer = new org.apache.xml.serialize.XMLSerializer(writer, OutFormat);
serializer.asDOMSerializer().serialize((org.w3c.dom.Document) myDocument);
System.err.println("Result: \n"+writer.toString());
// </michi>
}
}