001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache license, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the license for the specific language governing permissions and
015 * limitations under the license.
016 */
017package org.apache.logging.log4j.core.util;
018
019import java.io.IOException;
020import java.io.OutputStream;
021
022/**
023 * A delegating OutputStream that does not close its delegate.
024 */
025public class CloseShieldOutputStream extends OutputStream {
026
027    private final OutputStream delegate;
028
029    public CloseShieldOutputStream(final OutputStream delegate) {
030        this.delegate = delegate;
031    }
032
033    /**
034     * Does nothing.
035     */
036    @Override
037    public void close() {
038        // do not close delegate
039    }
040
041    @Override
042    public void flush() throws IOException {
043        delegate.flush();
044    }
045
046    @Override
047    public void write(final byte[] b) throws IOException {
048        delegate.write(b);
049    }
050
051    @Override
052    public void write(final byte[] b, final int off, final int len) throws IOException {
053        delegate.write(b, off, len);
054    }
055
056    @Override
057    public void write(final int b) throws IOException {
058        delegate.write(b);
059    }
060}