cxmlcontenthandler.java

用Java写的面相对象的数据库管理系统

/*
 *  $Id: CXMLContentHandler.java,v 1.5 2000/11/08 16:31:17 conny Exp $
 *
 *  This code was part of the prove of concept of a binary representation of XML
 *  called CXML send to the Cocoon users list by Stefano Mazzocchi.
 */

package org.ozoneDB.xml.util;

import java.io.OutputStream;
import java.io.IOException;
import java.io.Serializable;

import org.xml.sax.SAXException;
import org.xml.sax.ContentHandler;
import org.xml.sax.Attributes;
import org.xml.sax.Locator;


/**
 */
class CXMLContentHandler implements ContentHandler, Serializable {
    
    public final static boolean debug = false;
    
    public final static int START_DOCUMENT = 0;
    public final static int END_DOCUMENT = 1;
    public final static int START_PREFIX_MAPPING = 2;
    public final static int END_PREFIX_MAPPING = 3;
    public final static int START_ELEMENT = 4;
    public final static int END_ELEMENT = 5;
    public final static int CHARACTERS = 6;
    public final static int IGNORABLE_WHITESPACE = 7;
    public final static int PROCESSING_INSTRUCTION = 8;
    
    private final CompiledXMLOutputStream out;
    
    
    public CXMLContentHandler( OutputStream stream ) throws IOException{
        out = new CompiledXMLOutputStream( stream );
    }
    
    
    public void startDocument() throws SAXException {
        if (debug) {
            System.out.println(this.getClass().getName() + ": startDocument()");
        }
        try {
            out.writeEvent( START_DOCUMENT );
        } catch (Exception e) {
            throw new SAXException( e );
        } 
    } 
    
    
    public void endDocument() throws SAXException {
        if (debug) {
            System.out.println(this.getClass().getName() + ": endRuntime()");
        }
        try {
            out.writeEvent( END_DOCUMENT );
        } catch (Exception e) {
            throw new SAXException( e );
        } 
    } 
    
    
    public void startPrefixMapping( java.lang.String prefix, java.lang.String uri ) throws SAXException {
        if (debug) {
            System.out.println(this.getClass().getName() + ": startPrefixMapping(...)");
        }
        try {
            out.writeEvent( START_PREFIX_MAPPING );
            out.writeString( prefix );
            out.writeString( uri );
        } catch (Exception e) {
            throw new SAXException( e );
        } 
    } 
    
    
    public void endPrefixMapping( java.lang.String prefix ) throws SAXException {
        if (debug) {
            System.out.println(this.getClass().getName() + ": endPrefixMapping(...)");
        }
        try {
            out.writeEvent( END_PREFIX_MAPPING );
            out.writeString( prefix );
        } catch (Exception e) {
            throw new SAXException( e );
        } 
    } 
    
    
    public void startElement( java.lang.String namespaceURI, java.lang.String localName, java.lang.String qName,
            Attributes atts ) throws SAXException {
        if (debug) {
            System.out.println(this.getClass().getName() + ": startElement(...)");
        }
        try {
            int length = atts.getLength();
            out.writeEvent( START_ELEMENT );
            out.writeAttributes( length );
            for (int i = 0; i < length; i++) {
                out.writeString( atts.getURI( i ) );
                out.writeString( atts.getLocalName( i ) );
                out.writeString( atts.getQName( i ) );
                out.writeString( atts.getType( i ) );
                out.writeString( atts.getValue( i ) );
            } 
            out.writeString( namespaceURI );
            out.writeString( localName );
            out.writeString( qName );
        } catch (Exception e) {
            throw new SAXException( e );
        } 
    } 
    
    
    public void endElement( java.lang.String namespaceURI, java.lang.String localName, java.lang.String qName ) 
            throws SAXException {
        if (debug) {
            System.out.println(this.getClass().getName() + ": endElement(...)");
        }
        try {
            out.writeEvent( END_ELEMENT );
            out.writeString( namespaceURI );
            out.writeString( localName );
            out.writeString( qName );
        } catch (Exception e) {
            throw new SAXException( e );
        } 
    } 
    
    
    public void characters( char[] ch, int start, int length ) throws SAXException {
        if (debug) {
            System.out.println(this.getClass().getName() + ": characters(...)");
        }
        try {
            out.writeEvent( CHARACTERS );
            out.writeChars( ch, start, length );
        } catch (Exception e) {
            throw new SAXException( e );
        } 
    } 
    
    
    public void ignorableWhitespace( char[] ch, int start, int length ) throws SAXException {
        if (debug) {
            System.out.println(this.getClass().getName() + ": ignorableWhitespace(...)");
        }
        try {
            out.writeEvent( IGNORABLE_WHITESPACE );
            out.writeChars( ch, start, length );
        } catch (Exception e) {
            throw new SAXException( e );
        } 
    } 
    
    
    public void processingInstruction( java.lang.String target, java.lang.String data ) throws SAXException {
        if (debug) {
            System.out.println(this.getClass().getName() + ": processingInstruction(...)");
        }
        try {
            out.writeEvent( PROCESSING_INSTRUCTION );
            out.writeString( target );
            out.writeString( data );
        } catch (Exception e) {
            throw new SAXException( e );
        } 
    } 
    
    
    public void setDocumentLocator( Locator locator ) {
    // ignore.
    } 
    
    
    public void skippedEntity( java.lang.String name ) throws SAXException {
        if (debug) {
            System.out.println(this.getClass().getName() + ": skippedEntity(...)[ignored]");
        }
    // ignore.
    } 
}