domserializerimpl.java

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/*
 * Copyright 1999-2005 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.
 */

package com.sun.org.apache.xml.internal.serialize;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.lang.reflect.Method;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.StringTokenizer;
import java.util.Vector;

import com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl;
import com.sun.org.apache.xerces.internal.dom.DOMErrorImpl;
import com.sun.org.apache.xerces.internal.dom.DOMLocatorImpl;
import com.sun.org.apache.xerces.internal.dom.DOMMessageFormatter;
import com.sun.org.apache.xerces.internal.dom.DOMNormalizer;
import com.sun.org.apache.xerces.internal.dom.DOMStringListImpl;
import org.w3c.dom.DOMConfiguration;
import org.w3c.dom.DOMError;
import org.w3c.dom.DOMErrorHandler;
import org.w3c.dom.DOMStringList;
import com.sun.org.apache.xerces.internal.impl.Constants;
import com.sun.org.apache.xerces.internal.impl.XMLEntityManager;
import com.sun.org.apache.xerces.internal.util.NamespaceSupport;
import com.sun.org.apache.xerces.internal.util.SymbolTable;
import com.sun.org.apache.xerces.internal.util.XML11Char;
import com.sun.org.apache.xerces.internal.util.XMLChar;
import org.w3c.dom.Attr;
import org.w3c.dom.Comment;
import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentFragment;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.ProcessingInstruction;
import org.w3c.dom.ls.LSException;
import org.w3c.dom.ls.LSOutput;
import org.w3c.dom.ls.LSSerializer;
import org.w3c.dom.ls.LSSerializerFilter;


/**
 * EXPERIMENTAL: Implemenatation of DOM Level 3 org.w3c.ls.LSSerializer  by delegating serialization
 * calls to <CODE>XMLSerializer</CODE>.
 * LSSerializer provides an API for serializing (writing) a DOM document out in an
 * XML document. The XML data is written to an output stream.
 * During serialization of XML data, namespace fixup is done when possible as
 * defined in DOM Level 3 Core, Appendix B.
 *
 * @author Elena Litani, IBM
 * @author Gopal Sharma, Sun Microsystems
 * @author Arun Yadav, Sun Microsystems
 * @author Sunitha Reddy, Sun Microsystems
 * @version $Id: DOMSerializerImpl.java,v 1.5 2006/01/23 06:47:25 sunithareddy Exp $
 */
public class DOMSerializerImpl implements LSSerializer, DOMConfiguration {

    // TODO: When DOM Level 3 goes to REC replace method calls using
    // reflection for: getXmlEncoding, getInputEncoding and getXmlEncoding
    // with regular static calls on the Document object.
	
    // data
    // serializer
    private XMLSerializer serializer;

    // XML 1.1 serializer
    private XML11Serializer xml11Serializer;
    
    //Recognized parameters
    private DOMStringList fRecognizedParameters;
    
    /** REVISIT: Currently we handle 3 different configurations, would be nice just have one configuration
     * that has different recognized parameters depending if it is used in Core/LS. 
     */
    protected short features = 0;

    protected final static short NAMESPACES          = 0x1<<0;
    protected final static short WELLFORMED          = 0x1<<1;
    protected final static short ENTITIES            = 0x1<<2;
    protected final static short CDATA               = 0x1<<3;
    protected final static short SPLITCDATA          = 0x1<<4;
    protected final static short COMMENTS            = 0x1<<5;
    protected final static short DISCARDDEFAULT      = 0x1<<6;
    protected final static short INFOSET             = 0x1<<7;
    protected final static short XMLDECL             = 0x1<<8;
    protected final static short NSDECL              = 0x1<<9;
    protected final static short DOM_ELEMENT_CONTENT_WHITESPACE = 0x1<<10;
    protected final static short FORMAT_PRETTY_PRINT = 0x1<<11;

    // well-formness checking
    private DOMErrorHandler fErrorHandler = null;    
    private final DOMErrorImpl fError = new DOMErrorImpl();
    private final DOMLocatorImpl fLocator = new DOMLocatorImpl();
    private static final RuntimeException abort = new RuntimeException();

    /**
     * Constructs a new LSSerializer.
     * The constructor turns on the namespace support in <code>XMLSerializer</code> and
     * initializes the following fields: fNSBinder, fLocalNSBinder, fSymbolTable,
     * fEmptySymbol, fXmlSymbol, fXmlnsSymbol, fNamespaceCounter, fFeatures.
     */
    public DOMSerializerImpl() {
        // set default features
        features |= NAMESPACES;
        features |= ENTITIES;
        features |= COMMENTS;
        features |= CDATA;
        features |= SPLITCDATA;
        features |= WELLFORMED;
        features |= NSDECL;
        features |= DOM_ELEMENT_CONTENT_WHITESPACE;
        features |= DISCARDDEFAULT;
        features |= XMLDECL;
             
        serializer = new XMLSerializer();
        initSerializer(serializer);
    }



    //
    // LSSerializer methods
    //

    public DOMConfiguration getDomConfig(){
        return this;
    }

    /** DOM L3-EXPERIMENTAL:
     * Setter for boolean and object parameters
     */
    public void setParameter(String name, Object value) throws DOMException {
        if (value instanceof Boolean) {
            boolean state = ((Boolean) value).booleanValue();
            if (name.equalsIgnoreCase(Constants.DOM_INFOSET)){
                if (state){
                    features &= ~ENTITIES;
                    features &= ~CDATA;
                    features |= NAMESPACES;
                    features |= NSDECL;
                    features |= WELLFORMED;
                    features |= COMMENTS;                 
                }
                // false does not have any effect
            } else if (name.equalsIgnoreCase(Constants.DOM_XMLDECL)) {
                features =
                    (short) (state ? features | XMLDECL : features & ~XMLDECL);                
            } else if (name.equalsIgnoreCase(Constants.DOM_NAMESPACES)) {
                features =
                    (short) (state
                        ? features | NAMESPACES
                        : features & ~NAMESPACES);
                serializer.fNamespaces = state;
            } else if (name.equalsIgnoreCase(Constants.DOM_SPLIT_CDATA)) {
                features =
                    (short) (state
                        ? features | SPLITCDATA
                        : features & ~SPLITCDATA);
            } else if (name.equalsIgnoreCase(Constants.DOM_DISCARD_DEFAULT_CONTENT)) {
                features =
                    (short) (state
                        ? features | DISCARDDEFAULT
                        : features & ~DISCARDDEFAULT);
            } else if (name.equalsIgnoreCase(Constants.DOM_WELLFORMED)) {
                features =
                    (short) (state
                        ? features | WELLFORMED
                        : features & ~WELLFORMED);
            } else if (name.equalsIgnoreCase(Constants.DOM_ENTITIES)){
                features =
                    (short) (state
                        ? features | ENTITIES
                        : features & ~ENTITIES);
            }
            else if (name.equalsIgnoreCase(Constants.DOM_CDATA_SECTIONS)){
                features =
                    (short) (state
                        ? features | CDATA
                        : features & ~CDATA);
                        }
            else if (name.equalsIgnoreCase(Constants.DOM_COMMENTS)){
                features =
                     (short) (state
                         ? features | COMMENTS
                         : features & ~COMMENTS);
            }
            else if (name.equalsIgnoreCase(Constants.DOM_FORMAT_PRETTY_PRINT)){
                features =
                     (short) (state
                         ? features | FORMAT_PRETTY_PRINT
                         : features & ~FORMAT_PRETTY_PRINT);
            }
                else if (name.equalsIgnoreCase(Constants.DOM_CANONICAL_FORM)
                    || name.equalsIgnoreCase(Constants.DOM_VALIDATE_IF_SCHEMA)
                    || name.equalsIgnoreCase(Constants.DOM_VALIDATE)
                    || name.equalsIgnoreCase(Constants.DOM_CHECK_CHAR_NORMALIZATION)
                    || name.equalsIgnoreCase(Constants.DOM_DATATYPE_NORMALIZATION)) {
                //  || name.equalsIgnoreCase(Constants.DOM_NORMALIZE_CHARACTERS)) {
                // true is not supported
                if (state) {
                    String msg =
                        DOMMessageFormatter.formatMessage(
                            DOMMessageFormatter.DOM_DOMAIN,
                            "FEATURE_NOT_SUPPORTED",
                            new Object[] { name });
                    throw new DOMException(DOMException.NOT_SUPPORTED_ERR, msg);
                }
            }else if (
			name.equalsIgnoreCase(Constants.DOM_NAMESPACE_DECLARATIONS)) {
				//namespace-declaration has effect only if namespaces is true
				features =
					(short) (state
						? features | NSDECL
						: features & ~NSDECL);
				serializer.fNamespacePrefixes = state;							
            } else if (name.equalsIgnoreCase(Constants.DOM_ELEMENT_CONTENT_WHITESPACE)
                    || name.equalsIgnoreCase(Constants.DOM_IGNORE_UNKNOWN_CHARACTER_DENORMALIZATIONS)) {
                // false is not supported
                if (!state) {
                    String msg =
                        DOMMessageFormatter.formatMessage(
                            DOMMessageFormatter.DOM_DOMAIN,
                            "FEATURE_NOT_SUPPORTED",
                            new Object[] { name });
                    throw new DOMException(DOMException.NOT_SUPPORTED_ERR, msg);
                }
            } else {
                String msg =
                    DOMMessageFormatter.formatMessage(
                        DOMMessageFormatter.DOM_DOMAIN,
                        "FEATURE_NOT_FOUND",
                        new Object[] { name });
                throw new DOMException(DOMException.NOT_SUPPORTED_ERR, msg);
            }
        } else if (name.equalsIgnoreCase(Constants.DOM_ERROR_HANDLER)) {
            if (value == null || value instanceof DOMErrorHandler) {
                fErrorHandler = (DOMErrorHandler)value;
            } else {
                String msg =
                    DOMMessageFormatter.formatMessage(
                        DOMMessageFormatter.DOM_DOMAIN,
                        "TYPE_MISMATCH_ERR",
                        new Object[] { name });
                throw new DOMException(DOMException.TYPE_MISMATCH_ERR, msg);
            }
        } else if (
            name.equalsIgnoreCase(Constants.DOM_RESOURCE_RESOLVER)
                || name.equalsIgnoreCase(Constants.DOM_SCHEMA_LOCATION)
                || name.equalsIgnoreCase(Constants.DOM_SCHEMA_TYPE)
                || name.equalsIgnoreCase(Constants.DOM_NORMALIZE_CHARACTERS) 
                && value != null) {
            String msg =
                DOMMessageFormatter.formatMessage(
                    DOMMessageFormatter.DOM_DOMAIN,
                    "FEATURE_NOT_SUPPORTED",
                    new Object[] { name });
            throw new DOMException(DOMException.NOT_SUPPORTED_ERR, msg);
        } else {
            String msg =
                DOMMessageFormatter.formatMessage(
                    DOMMessageFormatter.DOM_DOMAIN,
                    "FEATURE_NOT_FOUND",
                    new Object[] { name });
            throw new DOMException(DOMException.NOT_FOUND_ERR, msg);
        }
    }

    /** DOM L3-EXPERIMENTAL:
     * Check if parameter can be set
     */
    public boolean canSetParameter(String name, Object state) {
        
        if (state == null) {
            return true;
        }
        
        if (state instanceof Boolean) {
            boolean value = ((Boolean) state).booleanValue();
            
            if (name.equalsIgnoreCase(Constants.DOM_NAMESPACES)
                || name.equalsIgnoreCase(Constants.DOM_SPLIT_CDATA)
                || name.equalsIgnoreCase(Constants.DOM_DISCARD_DEFAULT_CONTENT)