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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements. See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache license, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License. You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the license for the specific language governing permissions and
15   * limitations under the license.
16   */
17  package org.apache.logging.log4j.core.util;
18  
19  import java.io.IOException;
20  import java.io.OutputStream;
21  
22  /**
23   * A delegating OutputStream that does not close its delegate.
24   */
25  public class CloseShieldOutputStream extends OutputStream {
26  
27      private final OutputStream delegate;
28  
29      public CloseShieldOutputStream(final OutputStream delegate) {
30          this.delegate = delegate;
31      }
32  
33      @Override
34      public void close() {
35          // do not close delegate
36      }
37  
38      @Override
39      public void flush() throws IOException {
40          delegate.flush();
41      }
42  
43      @Override
44      public void write(final byte[] b) throws IOException {
45          delegate.write(b);
46      }
47  
48      @Override
49      public void write(final byte[] b, final int off, final int len) throws IOException {
50          delegate.write(b, off, len);
51      }
52  
53      @Override
54      public void write(final int b) throws IOException {
55          delegate.write(b);
56      }
57  }