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

import java.io.InputStream;
import java.io.Reader;

import com.sun.org.apache.xerces.internal.xni.parser.XMLInputSource;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;

/**
 * An XMLInputSource analogue to javax.xml.transform.sax.SAXSource.
 * 
 * @version $Id: SAXInputSource.java,v 1.5 2010-11-01 04:40:14 joehw Exp $
 */
public final class SAXInputSource extends XMLInputSource {
    
    private XMLReader fXMLReader;
    private InputSource fInputSource;
    
    public SAXInputSource() {
        this(null);
    }
    
    public SAXInputSource(InputSource inputSource) {
        this(null, inputSource);
    }
    
    public SAXInputSource(XMLReader reader, InputSource inputSource) {
        super(inputSource != null ? inputSource.getPublicId() : null, 
                inputSource != null ? inputSource.getSystemId() : null, null);
        if (inputSource != null) {
            setByteStream(inputSource.getByteStream());
            setCharacterStream(inputSource.getCharacterStream());
            setEncoding(inputSource.getEncoding());
        }
        fInputSource = inputSource;
        fXMLReader = reader;
    }
    
    public void setXMLReader(XMLReader reader) {
        fXMLReader = reader;
    }
    
    public XMLReader getXMLReader() {
        return fXMLReader;
    }
    
    public void setInputSource(InputSource inputSource) {
        if (inputSource != null) {
            setPublicId(inputSource.getPublicId());
            setSystemId(inputSource.getSystemId());
            setByteStream(inputSource.getByteStream());
            setCharacterStream(inputSource.getCharacterStream());
            setEncoding(inputSource.getEncoding());
        }
        else {
            setPublicId(null);
            setSystemId(null);
            setByteStream(null);
            setCharacterStream(null);
            setEncoding(null);
        }
        fInputSource = inputSource;
    }
    
    public InputSource getInputSource() {
        return fInputSource;
    }
    
    /** 
     * Sets the public identifier. 
     *
     * @param publicId The new public identifier.
     */
    public void setPublicId(String publicId) {
        super.setPublicId(publicId);
        if (fInputSource == null) {
            fInputSource = new InputSource();
        }
        fInputSource.setPublicId(publicId);
    } // setPublicId(String)
    
    /** 
     * Sets the system identifier. 
     *
     * @param systemId The new system identifier.
     */
    public void setSystemId(String systemId) {
        super.setSystemId(systemId);
        if (fInputSource == null) {
            fInputSource = new InputSource();
        }
        fInputSource.setSystemId(systemId);
    } // setSystemId(String)
    
    /**
     * Sets the byte stream. If the byte stream is not already opened
     * when this object is instantiated, then the code that opens the
     * stream should also set the byte stream on this object. Also, if
     * the encoding is auto-detected, then the encoding should also be
     * set on this object.
     *
     * @param byteStream The new byte stream.
     */
    public void setByteStream(InputStream byteStream) {
        super.setByteStream(byteStream);
        if (fInputSource == null) {
            fInputSource = new InputSource();
        }
        fInputSource.setByteStream(byteStream);
    } // setByteStream(InputStream)
    
    /**
     * Sets the character stream. If the character stream is not already
     * opened when this object is instantiated, then the code that opens 
     * the stream should also set the character stream on this object. 
     * Also, the encoding of the byte stream used by the reader should 
     * also be set on this object, if known.
     *
     * @param charStream The new character stream.
     *
     * @see #setEncoding
     */
    public void setCharacterStream(Reader charStream) {
        super.setCharacterStream(charStream);
        if (fInputSource == null) {
            fInputSource = new InputSource();
        }
        fInputSource.setCharacterStream(charStream);
    } // setCharacterStream(Reader)
    
    /**
     * Sets the encoding of the stream.
     *
     * @param encoding The new encoding.
     */
    public void setEncoding(String encoding) {
        super.setEncoding(encoding);
        if (fInputSource == null) {
            fInputSource = new InputSource();
        }
        fInputSource.setEncoding(encoding);
    } // setEncoding(String)
    
} // SAXInputSource