toxmlstream.java

来自「JAVA 所有包」· Java 代码 · 共 627 行 · 第 1/2 页

/*
 * 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: ToXMLStream.java,v 1.2.4.2 2005/09/15 12:01:25 suresh_emailid Exp $
 */
 package com.sun.org.apache.xml.internal.serializer;

import java.io.IOException;

import javax.xml.transform.ErrorListener;
import javax.xml.transform.Result;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;

import com.sun.org.apache.xml.internal.serializer.utils.MsgKey;
import com.sun.org.apache.xml.internal.serializer.utils.Utils;
import org.xml.sax.SAXException;

/**
 * This class converts SAX or SAX-like calls to a 
 * serialized xml document.  The xsl:output method is "xml".
 * 
 * This class is used explicitly in code generated by XSLTC, 
 * so it is "public", but it should 
 * be viewed as internal or package private, this is not an API.
 * 
 * @xsl.usage internal
 */
public final class ToXMLStream extends ToStream
{

    /**
     * remembers if we need to write out "]]>" to close the CDATA
     */
    boolean m_cdataTagOpen = false;


    /**
     * Map that tells which XML characters should have special treatment, and it
     *  provides character to entity name lookup.
     */
    private static CharInfo m_xmlcharInfo =
//      new CharInfo(CharInfo.XML_ENTITIES_RESOURCE);
        CharInfo.getCharInfo(CharInfo.XML_ENTITIES_RESOURCE, Method.XML);

    /**
     * Default constructor.
     */
    public ToXMLStream()
    {
        m_charInfo = m_xmlcharInfo;

        initCDATA();
        // initialize namespaces
        m_prefixMap = new NamespaceMappings();

    }

    /**
     * Copy properties from another SerializerToXML.
     *
     * @param xmlListener non-null reference to a SerializerToXML object.
     */
    public void CopyFrom(ToXMLStream xmlListener)
    {

        m_writer = xmlListener.m_writer;


        // m_outputStream = xmlListener.m_outputStream;
        String encoding = xmlListener.getEncoding();
        setEncoding(encoding);

        setOmitXMLDeclaration(xmlListener.getOmitXMLDeclaration());

        m_ispreserve = xmlListener.m_ispreserve;
        m_preserves = xmlListener.m_preserves;
        m_isprevtext = xmlListener.m_isprevtext;
        m_doIndent = xmlListener.m_doIndent;
        setIndentAmount(xmlListener.getIndentAmount());
        m_startNewLine = xmlListener.m_startNewLine;
        m_needToOutputDocTypeDecl = xmlListener.m_needToOutputDocTypeDecl;
        setDoctypeSystem(xmlListener.getDoctypeSystem());
        setDoctypePublic(xmlListener.getDoctypePublic());        
        setStandalone(xmlListener.getStandalone());
        setMediaType(xmlListener.getMediaType());
        m_maxCharacter = xmlListener.m_maxCharacter;
        m_encodingInfo = xmlListener.m_encodingInfo;
        m_spaceBeforeClose = xmlListener.m_spaceBeforeClose;
        m_cdataStartCalled = xmlListener.m_cdataStartCalled;

    }

    /**
     * Receive notification of the beginning of a document.
     *
     * @throws org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     *
     * @throws org.xml.sax.SAXException
     */
    public void startDocumentInternal() throws org.xml.sax.SAXException
    {

        if (m_needToCallStartDocument)
        { 
            super.startDocumentInternal();
            m_needToCallStartDocument = false;

            if (m_inEntityRef)
                return;

            m_needToOutputDocTypeDecl = true;
            m_startNewLine = false;
            /* The call to getXMLVersion() might emit an error message
             * and we should emit this message regardless of if we are 
             * writing out an XML header or not.
             */ 
            if (getOmitXMLDeclaration() == false)
            {
                String encoding = Encodings.getMimeEncoding(getEncoding());
                String version = getVersion();
                if (version == null)
                    version = "1.0";
                String standalone;

                if (m_standaloneWasSpecified)
                {
                    standalone = " standalone=\"" + getStandalone() + "\"";
                }
                else
                {
                    standalone = "";
                }

                try
                {
                    final java.io.Writer writer = m_writer;
                    writer.write("<?xml version=\"");
                    writer.write(version);
                    writer.write("\" encoding=\"");
                    writer.write(encoding);
                    writer.write('\"');
                    writer.write(standalone);
                    writer.write("?>");
                    if (m_doIndent)
                        writer.write(m_lineSep, 0, m_lineSepLen);
                } 
                catch(IOException e)
                {
                    throw new SAXException(e);
                }

            }
        }
    }

    /**
     * Receive notification of the end of a document.
     *
     * @throws org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     *
     * @throws org.xml.sax.SAXException
     */
    public void endDocument() throws org.xml.sax.SAXException
    {
        flushPending();
        if (m_doIndent && !m_isprevtext)
        {
            try
            {
            outputLineSep();
            }
            catch(IOException e)
            {
                throw new SAXException(e);
            }
        }

        flushWriter();
        
        if (m_tracer != null)
            super.fireEndDoc();
    }

    /**
     * Starts a whitespace preserving section. All characters printed
     * within a preserving section are printed without indentation and
     * without consolidating multiple spaces. This is equivalent to
     * the <tt>xml:space=&quot;preserve&quot;</tt> attribute. Only XML
     * and HTML serializers need to support this method.
     * <p>
     * The contents of the whitespace preserving section will be delivered
     * through the regular <tt>characters</tt> event.
     *
     * @throws org.xml.sax.SAXException
     */
    public void startPreserving() throws org.xml.sax.SAXException
    {

        // Not sure this is really what we want.  -sb
        m_preserves.push(true);

        m_ispreserve = true;
    }

    /**
     * Ends a whitespace preserving section.
     *
     * @see #startPreserving
     *
     * @throws org.xml.sax.SAXException
     */
    public void endPreserving() throws org.xml.sax.SAXException
    {

        // Not sure this is really what we want.  -sb
        m_ispreserve = m_preserves.isEmpty() ? false : m_preserves.pop();
    }

    /**
     * Receive notification of a processing instruction.
     *
     * @param target The processing instruction target.
     * @param data The processing instruction data, or null if
     *        none was supplied.
     * @throws org.xml.sax.SAXException Any SAX exception, possibly
     *            wrapping another exception.
     *
     * @throws org.xml.sax.SAXException
     */
    public void processingInstruction(String target, String data)
        throws org.xml.sax.SAXException
    {
        if (m_inEntityRef)
            return;
        
        flushPending();   

        if (target.equals(Result.PI_DISABLE_OUTPUT_ESCAPING))
        {
            startNonEscaping();
        }
        else if (target.equals(Result.PI_ENABLE_OUTPUT_ESCAPING))
        {
            endNonEscaping();
        }
        else
        {
            try
            {
                if (m_elemContext.m_startTagOpen)
                {
                    closeStartTag();
                    m_elemContext.m_startTagOpen = false;
                }
                else if (m_needToCallStartDocument)
                    startDocumentInternal();                

                if (shouldIndent())
                    indent();

                final java.io.Writer writer = m_writer;
                writer.write("<?");
                writer.write(target);

                if (data.length() > 0
                    && !Character.isSpaceChar(data.charAt(0)))
                    writer.write(' ');

                int indexOfQLT = data.indexOf("?>");

                if (indexOfQLT >= 0)
                {

                    // See XSLT spec on error recovery of "?>" in PIs.
                    if (indexOfQLT > 0)
                    {
                        writer.write(data.substring(0, indexOfQLT));
                    }

                    writer.write("? >"); // add space between.

                    if ((indexOfQLT + 2) < data.length())
                    {
                        writer.write(data.substring(indexOfQLT + 2));
                    }
                }
                else
                {
                    writer.write(data);
                }

                writer.write('?');
                writer.write('>');

                // Always output a newline char if not inside of an
                // element. The whitespace is not significant in that
                // case.
                if (m_elemContext.m_currentElemDepth <= 0)