/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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 Lesser General Public License for more details.
*
* Copyright (c) 2006 - 2013 Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.repository.zip;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.CRC32;
import java.util.zip.DeflaterOutputStream;
/**
* A fully buffered stream.
*
* @author Thomas Morgner
*/
public class ZipEntryOutputStream extends OutputStream {
private ByteArrayOutputStream outputStream;
private DeflaterOutputStream deflaterOutputStream;
private boolean closed;
private ZipContentItem item;
private CRC32 crc32;
private long size;
public ZipEntryOutputStream( final ZipContentItem item ) {
if ( item == null ) {
throw new NullPointerException();
}
this.item = item;
this.outputStream = new ByteArrayOutputStream();
this.deflaterOutputStream = new DeflaterOutputStream( outputStream );
this.crc32 = new CRC32();
this.size = 0;
}
public void write( final int b )
throws IOException {
if ( closed ) {
throw new IOException( "Already closed" );
}
deflaterOutputStream.write( b );
crc32.update( b );
size += 1;
}
public void write( final byte[] b, final int off, final int len )
throws IOException {
if ( closed ) {
throw new IOException( "Already closed" );
}
deflaterOutputStream.write( b, off, len );
crc32.update( b, off, len );
size += len;
}
public void close()
throws IOException {
if ( closed ) {
// A duplicate close is just a NO-OP as with all other output streams.
return;
}
deflaterOutputStream.close();
item.setRawData( outputStream.toByteArray(), size, crc32.getValue() );
closed = true;
outputStream = null;
deflaterOutputStream = null;
}
public void write( final byte[] b )
throws IOException {
if ( closed ) {
throw new IOException( "Already closed" );
}
deflaterOutputStream.write( b );
crc32.update( b );
size += b.length;
}
public void flush()
throws IOException {
if ( closed ) {
throw new IOException( "Already closed" );
}
deflaterOutputStream.flush();
}
public long getSize() {
return size;
}
public long getCrc() {
return crc32.getValue();
}
}