View Javadoc

1   /*
2    * $Id$
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  package org.apache.struts2.compiler;
22  
23  import javax.tools.JavaFileObject;
24  import javax.tools.SimpleJavaFileObject;
25  import java.io.*;
26  import java.net.URI;
27  import java.net.URISyntaxException;
28  
29  /***
30   * Captures the output of the java compiler in memory
31   */
32  public class MemoryJavaFileObject extends SimpleJavaFileObject {
33  
34      private ByteArrayOutputStream out;
35  
36      public MemoryJavaFileObject(String name, JavaFileObject.Kind kind) {
37          super(toURI(name), kind);
38      }
39  
40      public InputStream openInputStream() throws IOException,
41              IllegalStateException, UnsupportedOperationException {
42          return new ByteArrayInputStream(out.toByteArray());
43      }
44  
45      public OutputStream openOutputStream() throws IOException,
46              IllegalStateException, UnsupportedOperationException {
47          return out = new ByteArrayOutputStream();
48      }
49  
50      private static URI toURI(String name) {
51          try {
52              return new URI(name);
53          } catch (URISyntaxException e) {
54              throw new RuntimeException(e);
55          }
56      }
57  
58      public byte[] toByteArray() {
59          return out.toByteArray();
60      }
61  }