log4j-core/src/main/java/org/apache/logging/log4j/core/util/CloseShieldOutputStream.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.logging.log4j.core.util;

import java.io.IOException;
import java.io.OutputStream;

/**
 * A delegating OutputStream that does not close its delegate.
 */
public class CloseShieldOutputStream extends OutputStream {

    private final OutputStream delegate;

    public CloseShieldOutputStream(final OutputStream delegate) {
        this.delegate = delegate;
    }

    /**
     * Does nothing.
     */
    @Override
    public void close() {
        // do not close delegate
    }

    @Override
    public void flush() throws IOException {
        delegate.flush();
    }

    @Override
    public void write(final byte[] b) throws IOException {
        delegate.write(b);
    }

    @Override
    public void write(final byte[] b, final int off, final int len) throws IOException {
        delegate.write(b, off, len);
    }

    @Override
    public void write(final int b) throws IOException {
        delegate.write(b);
    }
}