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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  
28  package org.apache.hc.core5.http.io.entity;
29  
30  import java.io.IOException;
31  import java.io.InputStream;
32  import java.io.OutputStream;
33  
34  import org.apache.hc.core5.http.HttpEntity;
35  import org.apache.hc.core5.util.Args;
36  
37  /**
38   * Abstract base class for immutable entities.
39   *
40   * @since 5.0
41   */
42  public abstract class AbstractImmutableHttpEntity implements HttpEntity, HttpContentProducer {
43  
44      static final int OUTPUT_BUFFER_SIZE = 4096;
45  
46      @Override
47      public void writeTo(final OutputStream outstream) throws IOException {
48          Args.notNull(outstream, "Output stream");
49          final InputStream instream = getContent();
50          if (instream != null) {
51              try {
52                  int l;
53                  final byte[] tmp = new byte[OUTPUT_BUFFER_SIZE];
54                  while ((l = instream.read(tmp)) != -1) {
55                      outstream.write(tmp, 0, l);
56                  }
57              } finally {
58                  instream.close();
59              }
60          }
61      }
62  
63      @Override
64      public String toString() {
65          final StringBuilder sb = new StringBuilder();
66          sb.append('[');
67          sb.append("Content-Type: ");
68          sb.append(getContentType());
69          sb.append(',');
70          sb.append("Content-Encoding: ");
71          sb.append(getContentEncoding());
72          sb.append(',');
73          final long len = getContentLength();
74          if (len >= 0) {
75              sb.append("Content-Length: ");
76              sb.append(len);
77              sb.append(',');
78          }
79          sb.append("Chunked: ");
80          sb.append(isChunked());
81          sb.append(']');
82          return sb.toString();
83      }
84  
85  }