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Hibernate's core ORM functionality
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
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 );
}
}
}