/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on May 25, 2011
*/
package com.bigdata.io.compression;
import it.unimi.dsi.lang.MutableString;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Serializable;
import java.nio.charset.Charset;
import org.apache.log4j.Logger;
import com.bigdata.io.ByteCountInputStream;
import com.bigdata.io.ByteCountOutputStream;
/**
* No compression version.
*
* @see http://userguide.icu-project.org/conversion/compression
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id: BOCU1Compressor.java 4582 2011-05-31 19:12:53Z thompsonbry $
*/
public class NoCompressor implements IUnicodeCompressor, Serializable {
private static final long serialVersionUID = 1L;
private static final transient Logger log = Logger
.getLogger(NoCompressor.class);
// @todo factor out lookup? (static)
private final transient Charset cs = Charset.forName("UTF-8");
// public void encode(final CharSequence s, final IManagedByteArray out) {
//
// // Wrap caller's buffer as OutputStream
// final ManagedByteArrayOutputStream mbaos = new ManagedByteArrayOutputStream(
// out);
//
// encode(s, mbaos);
//
// }
public int encode(final CharSequence s, final OutputStream os) {
final ByteCountOutputStream bcos = new ByteCountOutputStream(os);
// Wrap with Writer using encoder.
final OutputStreamWriter w = new OutputStreamWriter(bcos, cs);
try {
if (s instanceof MutableString) {
// Efficient: tunnels to the backing char[].
final MutableString t = (MutableString) s;
w.write(t.array(), 0, t.length());
} else if (s instanceof String) {
w.write((String) s);
} else {
// TODO optimize for CharBuffer, StringBuilder
w.write(s.toString());
}
w.flush();
w.close();
return bcos.getNWritten();
} catch (IOException ex) {
throw new RuntimeException(ex);
}
}
// public void decode(final IByteArraySlice in, final Appendable sb) {
//
// final DataInputBuffer dib = new DataInputBuffer(in.array(), in.off(),
// in.len());
//
// decode(dib, sb);
//
// }
public int decode(final InputStream in, final Appendable sb) {
final ByteCountInputStream bcis = new ByteCountInputStream(in);
// Wrap with decoder.
final InputStreamReader r = new InputStreamReader(bcis, cs);
try {
// decode
int ch;
while ((ch = r.read()) != -1) {
sb.append((char) ch);
}
return bcis.getNRead();
} catch (IOException ex) {
throw new RuntimeException(ex);
} finally {
try {
r.close();
} catch (IOException e) {
log.error(e, e);
}
}
}
}