jeevlet.representation.BlobRepresentation.java Source code

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Here is the source code for jeevlet.representation.BlobRepresentation.java

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//=============================================================================
//===   Copyright (C) 2010-2011 BRGM
//===
//===   This library is free software; you can redistribute it and/or
//===   modify it under the terms of the GNU Lesser General Public
//===   License as published by the Free Software Foundation; either
//===   version 2.1 of the License, or (at your option) any later version.
//===
//===   This library is distributed in the hope that it will be useful,
//===   but WITHOUT ANY WARRANTY; without even the implied warranty of
//===   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//===   Lesser General Public License for more details.
//===
//===   You should have received a copy of the GNU Lesser General Public
//===   License along with this library; if not, write to the Free Software
//===   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
//===
//===   Contact: Jeroen Ticheler - FAO - Viale delle Terme di Caracalla 2,
//===   Rome - Italy. email: GeoNetwork@fao.org
//==============================================================================

package jeevlet.representation;

import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.codec.binary.Base64;
import org.jdom.Element;
import org.restlet.data.MediaType;

public class BlobRepresentation extends JeevletRepresentation {

    private static final int BUF_SIZE = 8192;

    public BlobRepresentation(MediaType mediaType, long expectedSize) {
        super(mediaType, expectedSize);
    }

    public BlobRepresentation(MediaType mediaType) {
        super(mediaType);
    }

    public BlobRepresentation(Element element, MediaType mediaType, long expectedSize) {
        super(mediaType, expectedSize);
        this.response = element;
    }

    public BlobRepresentation(Element element, MediaType mediaType, boolean cache) {
        super(mediaType);
        // TODO expectedSize ?
        // TODO cache
        this.response = element;
    }

    @Override
    public void write(OutputStream arg0) throws IOException {
        if (response == null)
            return;

        String data = response.getText();

        // FIXME use apache commons codec instead of sun lib
        // byte blob[] = new BASE64Decoder().decodeBuffer(data);

        byte blob[] = Base64.decodeBase64(data.getBytes());

        ByteArrayInputStream input = new ByteArrayInputStream(blob);
        copy(input, arg0);
        arg0.flush();
        input.close();
    }

    //-----------------------------------------------------------------------------
    // copies an input stream to an output stream

    private static void copy(InputStream in, OutputStream output) throws IOException {
        BufferedInputStream input = new BufferedInputStream(in);
        try {
            byte buffer[] = new byte[BUF_SIZE];
            int nRead;
            do {
                nRead = input.read(buffer, 0, BUF_SIZE);
                output.write(buffer, 0, nRead);

            } while (nRead == BUF_SIZE);
            input.close();
        } catch (IOException e) {
            input.close();
            throw e;
        }
        output.flush();
    }

}