org.jboss.marshalling.LimitedByteOutput Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.jboss.marshalling;
import java.io.IOException;
import java.io.InterruptedIOException;
/**
* A limited byte output stream. Throws an exception if too many bytes are written.
*/
public class LimitedByteOutput extends ByteOutputStream {
private final long limit;
private long count;
/**
* Construct a new instance.
*
* @param byteOutput the byte output to write to
* @param limit the byte limit
*/
public LimitedByteOutput(final ByteOutput byteOutput, final long limit) {
super(byteOutput);
this.limit = limit;
}
/** {@inheritDoc} */
public void write(final int b) throws IOException {
final long count = this.count;
if (count < limit) {
super.write(b);
this.count = count + 1;
} else {
throw new IOException("Limit exceeded");
}
}
/** {@inheritDoc} */
public void write(final byte[] b, final int off, final int len) throws IOException {
final long count = this.count;
if (count + len > limit) {
throw new IOException("Limit exceeded");
}
try {
super.write(b, off, len);
} catch (InterruptedIOException e) {
this.count = count + e.bytesTransferred;
throw e;
}
this.count = count + len;
}
}