org.hibernate.internal.util.io.StreamCopier Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2011, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.internal.util.io;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import org.hibernate.HibernateException;
/**
* Utilities for copying I/O streams.
*
* @author Steve Ebersole
*/
public final class StreamCopier {
private StreamCopier() {
}
public static final int BUFFER_SIZE = 1024 * 4;
public static final byte[] BUFFER = new byte[ BUFFER_SIZE ];
public static long copy(InputStream from, OutputStream into) {
try {
long totalRead = 0;
while ( true ) {
synchronized ( BUFFER ) {
int amountRead = from.read( BUFFER );
if ( amountRead == -1 ) {
break;
}
into.write( BUFFER, 0, amountRead );
totalRead += amountRead;
if ( amountRead < BUFFER_SIZE ) {
// should mean there is no more data in the stream, no need for next read
break;
}
}
}
return totalRead;
}
catch (IOException e ) {
throw new HibernateException( "Unable to copy stream content", e );
}
}
}