/* $HeadURL:: $
* $Id$
*
* Copyright (c) 2009-2010 DuraSpace
* http://duraspace.org
*
* In collaboration with Topaz Inc.
* http://www.topazproject.org
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.akubraproject.rmi.client;
import java.io.IOException;
import java.io.InputStream;
import org.akubraproject.rmi.remote.PartialBuffer;
import org.akubraproject.rmi.remote.RemoteInputStream;
/**
* InputStream wrapper that forwards all reads to a RemoteInputStream.
*
* @author Pradeep Krishnan
*/
class ClientInputStream extends InputStream {
private final RemoteInputStream remote;
/**
* Creates a new ClientInputStream object.
*
* @param remote the rmi stub for the server side of this stream
*/
public ClientInputStream(RemoteInputStream remote) {
this.remote = remote;
}
@Override
public int read() throws IOException {
return remote.read();
}
@Override
public int read(byte[] buf, int off, int len) throws IOException {
if ((off < 0) || (off > buf.length))
throw new IllegalArgumentException("offset " + off + " is out of bounds");
if ((len < 0) || ((off + len) > buf.length))
throw new IllegalArgumentException("length " + len + " is out of bounds");
if (len == 0)
return 0;
PartialBuffer pb = remote.read(len);
if (pb == null)
return -1;
if (pb.getLength() > len)
throw new IOException("Server mis-behavior. Asked to read " + len + " got back "
+ pb.getLength());
System.arraycopy(pb.getBuffer(), pb.getOffset(), buf, off, pb.getLength());
return pb.getLength();
}
@Override
public long skip(long n) throws IOException {
return remote.skip(n);
}
@Override
public void close() throws IOException {
remote.close();
}
}