transformerfactoryimpl.java

java1.6众多例子参考

/*
 * Copyright 2001-2004 The Apache Software Foundation.
 *
 * Licensed 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.
 */
/*
 * $Id: TransformerFactoryImpl.java,v 1.8 2007/04/09 21:30:41 joehw Exp $
 */

package com.sun.org.apache.xalan.internal.xsltc.trax;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Properties;
import java.util.Vector;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

import javax.xml.XMLConstants;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.ParserConfigurationException;

import javax.xml.transform.ErrorListener;
import javax.xml.transform.Source;
import javax.xml.transform.Templates;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.URIResolver;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TemplatesHandler;
import javax.xml.transform.sax.TransformerHandler;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

import com.sun.org.apache.xml.internal.utils.StylesheetPIHandler;
import com.sun.org.apache.xml.internal.utils.StopParseException;

import com.sun.org.apache.xalan.internal.xsltc.compiler.Constants;
import com.sun.org.apache.xalan.internal.xsltc.compiler.SourceLoader;
import com.sun.org.apache.xalan.internal.xsltc.compiler.XSLTC;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
import com.sun.org.apache.xalan.internal.xsltc.dom.XSLTCDTMManager;


import org.xml.sax.InputSource;
import org.xml.sax.XMLFilter;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;

/**
 * Implementation of a JAXP1.1 TransformerFactory for Translets.
 * @author G. Todd Miller 
 * @author Morten Jorgensen
 * @author Santiago Pericas-Geertsen
 */
public class TransformerFactoryImpl
    extends SAXTransformerFactory implements SourceLoader, ErrorListener 
{
    // Public constants for attributes supported by the XSLTC TransformerFactory.
    public final static String TRANSLET_NAME = "translet-name";
    public final static String DESTINATION_DIRECTORY = "destination-directory";
    public final static String PACKAGE_NAME = "package-name";
    public final static String JAR_NAME = "jar-name";
    public final static String GENERATE_TRANSLET = "generate-translet";
    public final static String AUTO_TRANSLET = "auto-translet";
    public final static String USE_CLASSPATH = "use-classpath";
    public final static String DEBUG = "debug";
    public final static String ENABLE_INLINING = "enable-inlining";
    public final static String INDENT_NUMBER = "indent-number";
        
    /**
     * This error listener is used only for this factory and is not passed to
     * the Templates or Transformer objects that we create.
     */
    private ErrorListener _errorListener = this; 

    /**
     * This URIResolver is passed to all created Templates and Transformers
     */
    private URIResolver _uriResolver = null;

    /** 
     * As Gregor Samsa awoke one morning from uneasy dreams he found himself
     * transformed in his bed into a gigantic insect. He was lying on his hard,
     * as it were armour plated, back, and if he lifted his head a little he
     * could see his big, brown belly divided into stiff, arched segments, on
     * top of which the bed quilt could hardly keep in position and was about
     * to slide off completely. His numerous legs, which were pitifully thin
     * compared to the rest of his bulk, waved helplessly before his eyes.
     * "What has happened to me?", he thought. It was no dream....
     */
    protected final static String DEFAULT_TRANSLET_NAME = "GregorSamsa";
    
    /**
     * The class name of the translet
     */
    private String _transletName = DEFAULT_TRANSLET_NAME;
    
    /**
     * The destination directory for the translet
     */
    private String _destinationDirectory = null;
    
    /**
     * The package name prefix for all generated translet classes
     */
    private String _packageName = null;
    
    /**
     * The jar file name which the translet classes are packaged into
     */
    private String _jarFileName = null;

    /**
     * This Hashtable is used to store parameters for locating
     * <?xml-stylesheet ...?> processing instructions in XML docs.
     */
    private Hashtable _piParams = null;

    /**
     * The above hashtable stores objects of this class.
     */
    private static class PIParamWrapper {
	public String _media = null;
	public String _title = null;
	public String _charset = null;
	
	public PIParamWrapper(String media, String title, String charset) {
	    _media = media;
	    _title = title;
	    _charset = charset;
	}
    }

    /**
     * Set to <code>true</code> when debugging is enabled.
     */
    private boolean _debug = false;

    /**
     * Set to <code>true</code> when templates are inlined.
     */
    private boolean _enableInlining = false;
    
    /**
     * Set to <code>true</code> when we want to generate 
     * translet classes from the stylesheet.
     */
    private boolean _generateTranslet = false;
    
    /**
     * If this is set to <code>true</code>, we attempt to use translet classes
     * for transformation if possible without compiling the stylesheet. The
     * translet class is only used if its timestamp is newer than the timestamp
     * of the stylesheet.
     */
    private boolean _autoTranslet = false;
    
    /**
     * If this is set to <code>true</code>, we attempt to load the translet
     * from the CLASSPATH.
     */
    private boolean _useClasspath = false;

    /**
     * Number of indent spaces when indentation is turned on.
     */
    private int _indentNumber = -1;

    /**
     * The provider of the XSLTC DTM Manager service.  This is fixed for any
     * instance of this class.  In order to change service providers, a new
     * XSLTC <code>TransformerFactory</code> must be instantiated.
     * @see XSLTCDTMManager#getDTMManagerClass()
     */
    private Class m_DTMManagerClass;

    /**
     * <p>State of secure processing feature.</p>
     */
    private boolean _isSecureProcessing = false;

    /**
     * javax.xml.transform.sax.TransformerFactory implementation.
     */
    public TransformerFactoryImpl() {
        m_DTMManagerClass = XSLTCDTMManager.getDTMManagerClass();
    }

    /**
     * javax.xml.transform.sax.TransformerFactory implementation.
     * Set the error event listener for the TransformerFactory, which is used
     * for the processing of transformation instructions, and not for the
     * transformation itself.
     *
     * @param listener The error listener to use with the TransformerFactory
     * @throws IllegalArgumentException
     */
    public void setErrorListener(ErrorListener listener) 
	throws IllegalArgumentException 
    {
	if (listener == null) {
	    ErrorMsg err = new ErrorMsg(ErrorMsg.ERROR_LISTENER_NULL_ERR,
					"TransformerFactory");
            throw new IllegalArgumentException(err.toString());
	}
	_errorListener = listener;
    }

    /**
     * javax.xml.transform.sax.TransformerFactory implementation.
     * Get the error event handler for the TransformerFactory.
     *
     * @return The error listener used with the TransformerFactory
     */
    public ErrorListener getErrorListener() { 
	return _errorListener;
    }

    /**
     * javax.xml.transform.sax.TransformerFactory implementation.
     * Returns the value set for a TransformerFactory attribute
     *
     * @param name The attribute name
     * @return An object representing the attribute value
     * @throws IllegalArgumentException
     */
    public Object getAttribute(String name) 
	throws IllegalArgumentException 
    { 
	// Return value for attribute 'translet-name'
	if (name.equals(TRANSLET_NAME)) {
	    return _transletName;
	}
	else if (name.equals(GENERATE_TRANSLET)) {
	    return new Boolean(_generateTranslet);
	}
	else if (name.equals(AUTO_TRANSLET)) {
	    return new Boolean(_autoTranslet);
	}

	// Throw an exception for all other attributes
	ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_INVALID_ATTR_ERR, name);
	throw new IllegalArgumentException(err.toString());
    }

    /**
     * javax.xml.transform.sax.TransformerFactory implementation.
     * Sets the value for a TransformerFactory attribute.
     *
     * @param name The attribute name
     * @param value An object representing the attribute value
     * @throws IllegalArgumentException
     */
    public void setAttribute(String name, Object value) 
	throws IllegalArgumentException 
    { 
	// Set the default translet name (ie. class name), which will be used
	// for translets that cannot be given a name from their system-id.
	if (name.equals(TRANSLET_NAME) && value instanceof String) {
	    _transletName = (String) value;	      
	    return;
	}
	else if (name.equals(DESTINATION_DIRECTORY) && value instanceof String) {
	    _destinationDirectory = (String) value;
	    return;
	}
	else if (name.equals(PACKAGE_NAME) && value instanceof String) {
	    _packageName = (String) value;
	    return;
	}
	else if (name.equals(JAR_NAME) && value instanceof String) {
	    _jarFileName = (String) value;
	    return;
	}
	else if (name.equals(GENERATE_TRANSLET)) {
	    if (value instanceof Boolean) {
		_generateTranslet = ((Boolean) value).booleanValue();
		return;
	    }
	    else if (value instanceof String) {
		_generateTranslet = ((String) value).equalsIgnoreCase("true");
		return;
	    }
	}
	else if (name.equals(AUTO_TRANSLET)) {
	    if (value instanceof Boolean) {
		_autoTranslet = ((Boolean) value).booleanValue();
		return;
	    }
	    else if (value instanceof String) {
		_autoTranslet = ((String) value).equalsIgnoreCase("true");
		return;
	    }
	}
	else if (name.equals(USE_CLASSPATH)) {
	    if (value instanceof Boolean) {
		_useClasspath = ((Boolean) value).booleanValue();
		return;
	    }
	    else if (value instanceof String) {
		_useClasspath = ((String) value).equalsIgnoreCase("true");
		return;
	    }	    
	}
	else if (name.equals(DEBUG)) {
	    if (value instanceof Boolean) {
		_debug = ((Boolean) value).booleanValue();
		return;
	    }
	    else if (value instanceof String) {
		_debug = ((String) value).equalsIgnoreCase("true");
		return;
	    }
	}
	else if (name.equals(ENABLE_INLINING)) {
	    if (value instanceof Boolean) {
		_enableInlining = ((Boolean) value).booleanValue();
		return;
	    }
	    else if (value instanceof String) {
		_enableInlining = ((String) value).equalsIgnoreCase("true");
		return;
	    }
	}
	else if (name.equals(INDENT_NUMBER)) {
	    if (value instanceof String) {
		try {
		    _indentNumber = Integer.parseInt((String) value);