karaf-2.2.x/diagnostic/core/src/main/java/org/apache/karaf/diagnostic/core/common/ClosingEntryOutputStreamWrapper.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.karaf.diagnostic.core.common;

import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.ZipOutputStream;

/**
 * Output stream which closes entry instead closing whole stream.
 */
public class ClosingEntryOutputStreamWrapper extends OutputStream {

    /**
     * Wrapped ZIP output stream. 
     */
    private ZipOutputStream outputStream;

    /**
     * Creates new OutputStream.
     * 
     * @param outputStream Wrapped output stream.
     */
    public ClosingEntryOutputStreamWrapper(ZipOutputStream outputStream) {
        this.outputStream = outputStream;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void write(int b) throws IOException {
        outputStream.write(b);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void write(byte[] b) throws IOException {
        outputStream.write(b);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void write(byte[] b, int off, int len)
        throws IOException {
        outputStream.write(b, off, len);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void close() throws IOException {
        // close entry instead of closing zip stream.
        outputStream.closeEntry();
    }

}