saxparserimpl.java

来自「JAVA的一些源码 JAVA2 STANDARD EDITION DEVELO」· Java 代码 · 共 432 行 · 第 1/2 页

/*
 *
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2000-2004 The Apache Software Foundation.  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
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written 
 *    permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 1999, Sun Microsystems, Inc., 
 * http://www.sun.com.  For more information on the Apache Software 
 * Foundation, please see <http://www.apache.org/>.
 */

package com.sun.org.apache.xerces.internal.jaxp;

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Hashtable;

import javax.xml.parsers.SAXParserFactory;
import javax.xml.validation.Schema;

import com.sun.org.apache.xerces.internal.impl.Constants;
import com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser;
import com.sun.org.apache.xerces.internal.parsers.JAXPConfiguration;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.XMLReader;
import com.sun.org.apache.xerces.internal.util.SecurityManager;
import com.sun.org.apache.xerces.internal.util.SAXMessageFormatter;
import com.sun.org.apache.xerces.internal.xni.XNIException;
import com.sun.org.apache.xerces.internal.xni.parser.XMLParserConfiguration;

/**
 * This is the implementation specific class for the
 * <code>javax.xml.parsers.SAXParser</code>.
 * 
 * @author Rajiv Mordani
 * @author Edwin Goei
 * 
 * @version $Id: SAXParserImpl.java,v 1.23 2004/02/24 23:15:58 mrglavas Exp $
 */
public class SAXParserImpl extends javax.xml.parsers.SAXParser
    implements JAXPConstants {

        // Should XMLParserConfiguration have reset, ? we have reset at component level
    private final JAXPConfiguration parserConfiguration;
	private final AbstractSAXParser xmlReader;
    private String schemaLanguage = null;     // null means DTD
    private final Schema grammar;
    private final SecurityManager secureProcessing;
    private boolean isXIncludeAware;
   	private boolean enableSecureProcessing = true; 

    //we have to keep the reference to features and SAXParserFactory so that 
    //we can set the SAXParser to the same state when it 
    //was createed from the factory.
    private Hashtable features;
    private SAXParserFactory spf;
    
    private Hashtable parserFeatures = new Hashtable();
    
    public boolean isXIncludeAware() {
        return isXIncludeAware;
    }
    

    /**
     * Create a SAX parser with the associated features
     * @param features Hashtable of SAX features, may be null
     */
    SAXParserImpl(SAXParserFactory spfactory, Hashtable factoryfeatures)
        throws SAXException
    {
        this.spf = spfactory ;
        this.features = factoryfeatures;
        // inherit 
		secureProcessing = new SecurityManager();
        this.grammar = spf.getSchema();        
        parserConfiguration = new JAXPConfiguration(grammar);
        xmlReader = new com.sun.org.apache.xerces.internal.parsers.SAXParser(parserConfiguration);
        
        //initialize the feature as per factory settings..
        init();
    }

    /** Reset this instance back to factory settings */
    void resetSettings() throws SAXNotSupportedException, SAXNotRecognizedException {
        Enumeration keys  = parserFeatures.keys();        
        
        while(keys.hasMoreElements()){
            String propertyId = (String)keys.nextElement();
            Object value = parserFeatures.get(propertyId);
            if(value instanceof Boolean){
                //System.out.println("Remvoing feature = " + propertyId + " with value = " + parserConfiguration.getFeatureDefaultValue(propertyId));
                //this means it is a feature, we have to get default value from the configuration
                xmlReader.setFeature(propertyId, parserConfiguration.getFeatureDefaultValue(propertyId));
            }
            else{//it's a property
                //System.out.println("Remvoing property = " + propertyId);
                //null value should delete the property from underlying implementation.
                xmlReader.setProperty(propertyId, null);
            }
        }
        //clear the hashtable once we have removed all the properties.
        parserFeatures.clear();
        
    }
    
    //initialize the features as per factory settings.
    void init() throws SAXNotSupportedException, SAXNotRecognizedException {
                
        schemaLanguage = null ;
        this.isXIncludeAware = spf.isXIncludeAware();
		if(features != null ){
       		Object tmpValue = features.get(Constants.FEATURE_SECURE_PROCESSING);
			if( tmpValue != null ) 
				enableSecureProcessing = ((Boolean)tmpValue).booleanValue();
		}
		
		if(enableSecureProcessing){
        	try {
            	setProperty(Constants.XERCES_PROPERTY_PREFIX + Constants.SECURITY_MANAGER_PROPERTY, secureProcessing);
            } catch (SAXNotRecognizedException sex) {
                sex.printStackTrace();
            } catch (SAXNotSupportedException se) {
                se.printStackTrace();
            }
        }
        
		xmlReader.setFeature(
                Constants.XERCES_FEATURE_PREFIX + Constants.XINCLUDE_AWARE,
                isXIncludeAware);
        
        // If validating, provide a default ErrorHandler that prints
        // validation errors with a warning telling the user to set an
        // ErrorHandler.
        if (spf.isValidating()) {
            xmlReader.setErrorHandler(new DefaultValidationErrorHandler());
        }

        xmlReader.setFeature(Constants.SAX_FEATURE_PREFIX +
                             Constants.VALIDATION_FEATURE, spf.isValidating());

        // JAXP "namespaceAware" == SAX Namespaces feature
        // Note: there is a compatibility problem here with default values:
        // JAXP default is false while SAX 2 default is true!
        xmlReader.setFeature(Constants.SAX_FEATURE_PREFIX +
                             Constants.NAMESPACES_FEATURE,
                             spf.isNamespaceAware());

        // SAX "namespaces" and "namespace-prefixes" features should not
        // both be false.  We make them opposite for backward compatibility
        // since JAXP 1.0 apps may want to receive xmlns* attributes.
        xmlReader.setFeature(Constants.SAX_FEATURE_PREFIX +
                             Constants.NAMESPACE_PREFIXES_FEATURE,
                             !spf.isNamespaceAware());
        setFeatures(features);
        
    }//init()
    
    /**
     * Set any features of our XMLReader based on any features set on the
     * SAXParserFactory.
     *
     * XXX Does not handle possible conflicts between SAX feature names and
     * JAXP specific feature names, eg. SAXParserFactory.isValidating()
     */
    private void setFeatures(Hashtable features)
        throws SAXNotSupportedException, SAXNotRecognizedException
    {