CDataEncoderDelegate.java

/* Copyright (c) 2001 - 2013 OpenPlans - www.openplans.org. All rights reserved.
 * This code is licensed under the GPL 2.0 license, available at the root
 * application directory.
 */

package org.geoserver.wps;

import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.io.Reader;

import org.geoserver.wps.ppio.CDataPPIO;
import org.geotools.xml.EncoderDelegate;
import org.xml.sax.ContentHandler;
import org.xml.sax.ext.LexicalHandler;

/**
 * Encodes objects as text sections within CDATA markers
 * 
 * @author Andrea Aime - OpenGeo
 */
public class CDataEncoderDelegate implements EncoderDelegate {

    CDataPPIO ppio;

    Object object;

    public CDataEncoderDelegate(CDataPPIO ppio, Object object) {
        this.ppio = ppio;
        this.object = object;
    }

    public void encode(ContentHandler output) throws Exception {
        ((LexicalHandler) output).startCDATA();
        PipedInputStream pins = new PipedInputStream();
        PipedOutputStream pos = new PipedOutputStream(pins);
        ppio.encode(object, pos);
        Reader r = new InputStreamReader(pins);
        char[] buffer = new char[1024];
        int read;
        while ((read = r.read(buffer)) > 0) {
            output.characters(buffer, 0, read);
        }
        pos.close();
        r.close();
        ((LexicalHandler) output).endCDATA();
    }

    public void encode(OutputStream os) throws Exception {
        ppio.encode(object, os);
    }

}