View Javadoc

1   /*
2    * Copyright 2001-2004 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.apache.geronimo.ews.ws4j2ee.toWs;
18  
19  import org.apache.commons.logging.Log;
20  import org.apache.commons.logging.LogFactory;
21  import org.apache.geronimo.ews.ws4j2ee.context.J2EEWebServiceContext;
22  
23  import java.io.File;
24  import java.io.FileWriter;
25  import java.io.IOException;
26  import java.io.PrintWriter;
27  
28  /***
29   * <p>This is a conveniance class to wite the Writers</p>
30   *
31   * @author Srinath Perera(hemapani@opensource.lk)
32   */
33  
34  public abstract class AbstractWriter implements Writer {
35      /***
36       * <p>this parameter act as a mediator, It contains all the information
37       * this will be passed to the each writer. This will make sure
38       * even if the information that should passed around it will keep
39       * method signatures intact.</p>
40       */
41      protected static Log log =
42              LogFactory.getLog(AbstractWriter.class.getName());
43      protected J2EEWebServiceContext j2eewscontext;
44      /* this is used to write the file */
45      protected PrintWriter out;
46      private String fileName;
47      private boolean verbose;
48  
49      public AbstractWriter(J2EEWebServiceContext j2eewscontext, String filename)
50              throws GenerationFault {
51          this.j2eewscontext = j2eewscontext;
52          this.fileName = filename;
53          verbose = j2eewscontext.getMiscInfo().isVerbose();
54      }
55  
56      protected abstract void writeCode() throws GenerationFault;
57  
58      protected final void prepare() throws GenerationFault {
59          try {
60              File file = new File(this.fileName);
61              if (verbose) {
62                  log.info("genarating ... " + file.getAbsolutePath());
63              }
64              if (!isOverWrite() && file.exists()) {
65                  out = null;
66                  if (verbose) {
67                      log.info("the file already exists .. tool will not overwrite it ");
68                  }
69              } else {
70                  File parent = file.getParentFile();
71                  if (parent != null)
72                      parent.mkdirs();
73                  file.createNewFile();
74                  out = new PrintWriter(new FileWriter(file, false));
75              }
76          } catch (IOException e) {
77              log.error(e);
78              throw GenerationFault.createGenerationFault(e);
79          }
80      }
81  
82      protected final void cleanUp() throws GenerationFault {
83          if (out != null)
84              out.close();
85      }
86  
87      protected boolean isOverWrite() {
88          return true;
89      }
90  
91      public final void write() throws GenerationFault {
92          try {
93              prepare();
94              writeCode();
95          } finally {
96              cleanUp();
97          }
98      }
99  }