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1   package rydeen.io;
2   
3   import java.io.IOException;
4   import java.io.InputStream;
5   import java.io.OutputStream;
6   
7   import rydeen.Destination;
8   import rydeen.ProcessTarget;
9   
10  /**
11   * 抽象Destinationクラスです．
12   * {@link #output <code>output</code>}メソッドのデフォルト実装が行われています．
13   *
14   * @author Haruaki Tamada
15   */
16  public abstract class AbstractDestination implements Destination{
17  
18      @Override
19      public abstract OutputStream getOutput(String className) throws IOException;
20  
21      @Override
22      public abstract OutputStream getOutput(ProcessTarget target) throws IOException;
23  
24      @Override
25      public void output(ProcessTarget target) throws IOException{
26          InputStream in = null;
27          OutputStream out = null;
28          try{
29              in = target.getSource();
30              out = getOutput(target);
31              byte[] data = new byte[256];
32              int read = 0;
33  
34              while((read = in.read(data)) != 0){
35                  out.write(data, 0, read);
36              }
37          } finally{
38              if(in != null){
39                  in.close();
40              }
41              if(out != null){
42                  out.close();
43              }
44          }
45      }
46  
47      @Override
48      public abstract void close() throws IOException;
49  
50      /**
51       * 常にfalseを返します．
52       */
53      @Override
54      public boolean isClosed(){
55          return false;
56      }
57  }