net.sf.joost.emitter.TextEmitter.java Source code

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Here is the source code for net.sf.joost.emitter.TextEmitter.java

Source

/*
 * $Id: TextEmitter.java,v 1.4 2007/11/25 14:18:02 obecker Exp $
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is: this file
 *
 * The Initial Developer of the Original Code is Oliver Becker.
 *
 * Portions created by  ______________________
 * are Copyright (C) ______ _______________________.
 * All Rights Reserved.
 *
 * Contributor(s): Anatolij Zubow
 */

package net.sf.joost.emitter;

import java.io.IOException;
import java.io.Writer;

import net.sf.joost.OptionalLog;

import org.apache.commons.logging.Log;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

/**
 * This class implements an emitter that uses the <code>text</code> output
 * method for byte or character streams.
 * @version $Revision: 1.4 $ $Date: 2007/11/25 14:18:02 $
 * @author Oliver Becker, Anatolij Zubow
 */
public class TextEmitter extends StreamEmitter {
    // Log initialization
    private static Log log = OptionalLog.getLog(TextEmitter.class);

    /** Constructor */
    public TextEmitter(Writer writer, String encoding) {
        super(writer, encoding);
    }

    /** 
     * Does nothing
     */
    public void startDocument() {
    }

    /**
     * Flushes the output writer 
     */
    public void endDocument() throws SAXException {
        try {
            writer.flush();
        } catch (IOException ex) {
            if (log != null)
                log.error(ex);
            throw new SAXException(ex);
        }
    }

    /**
     * Does nothing
     */
    public void startElement(String uri, String lName, String qName, Attributes attrs) {
    }

    /** 
     * Does nothing
     */
    public void endElement(String uri, String lName, String qName) {
    }

    /**
     * Outputs characters.
     */
    public void characters(char[] ch, int start, int length) throws SAXException {
        // Check that the characters can be represented in the current encoding
        for (int i = 0; i < length; i++)
            if (!charsetEncoder.canEncode(ch[start + i]))
                throw new SAXException("Cannot output character with code " + (int) ch[start + i]
                        + " in the encoding '" + encoding + "'");

        try {
            writer.write(ch, start, length);
            if (DEBUG)
                log.debug("'" + new String(ch, start, length) + "'");
        } catch (IOException ex) {
            if (log != null)
                log.error(ex);
            throw new SAXException(ex);
        }
    }
}