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1   /*
2    * Copyright 2008 University Corporation for Advanced Internet Development, Inc.
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 edu.internet2.middleware.ant.util;
18  
19  import java.io.BufferedReader;
20  import java.io.File;
21  import java.io.FileReader;
22  import java.io.IOException;
23  
24  import org.apache.tools.ant.BuildException;
25  import org.apache.tools.ant.Task;
26  
27  /**
28   * Ant task that makes the contents of a file available as a property.
29   * 
30   * This ant task requires two attributes:
31   * <ul>
32   * <li><strong>input</strong> - the path to the input file</li>
33   * <li><strong>addProperty</strong> - name of the property that will receive the file contents as a string</li>
34   * <ul>
35   */
36  public class StringFromFile extends Task {
37  
38      /** The input file. */
39      private File input;
40  
41      /** Property name to which the file contents are added. */
42      private String addProperty;
43  
44      /** {@inheritDoc} */
45      public void execute() throws BuildException {
46          try {
47              StringBuilder fileData = new StringBuilder(1000);
48              BufferedReader reader = new BufferedReader(new FileReader(input));
49              char[] buf = new char[1024];
50              int numRead = 0;
51              while ((numRead = reader.read(buf)) != -1) {
52                  fileData.append(buf, 0, numRead);
53              }
54              reader.close();
55              getProject().setProperty(addProperty, fileData.toString());
56          } catch (IOException e) {
57              throw new BuildException("Unable to read file " + input.getAbsolutePath(), e);
58          }
59      }
60  
61      /**
62       * Sets the file from which the data will be read.
63       * 
64       * @param input file from which the data will be read
65       */
66      public void setInput(File input) {
67          this.input = input;
68      }
69  
70      /**
71       * Sets the property name to which the file contents are added.
72       * 
73       * @param addProperty property name to which the file contents are added.
74       */
75      public void setAddProperty(String addProperty) {
76          this.addProperty = addProperty;
77      }
78  }