org.jboss.marshalling.LimitedByteOutput Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * 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;
    }
}