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Java > Open Source Codes > org > apache > catalina > ant > ValidatorTask


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17
18
19 package org.apache.catalina.ant;
20
21
22 import java.io.BufferedInputStream JavaDoc;
23 import java.io.File JavaDoc;
24 import java.io.FileInputStream JavaDoc;
25 import java.io.InputStream JavaDoc;
26
27 import org.apache.catalina.startup.Constants;
28 import org.apache.catalina.startup.DigesterFactory;
29 import org.apache.tomcat.util.digester.Digester;
30 import org.apache.tools.ant.BuildException;
31 import org.xml.sax.InputSource JavaDoc;
32
33
34 /**
35  * Task for validating a web application deployment descriptor, using XML
36  * schema validation.
37  *
38  * @author Remy Maucherat
39  * @version $Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $
40  * @since 5.0
41  */
42
43 public class ValidatorTask extends BaseRedirectorHelperTask {
44
45
46     // ----------------------------------------------------- Instance Variables
47
48
49     // ------------------------------------------------------------- Properties
50
51
52     /**
53      * The path to the webapp directory.
54      */
55     protected String JavaDoc path = null;
56
57     public String JavaDoc getPath() {
58         return (this.path);
59     }
60
61     public void setPath(String JavaDoc path) {
62         this.path = path;
63     }
64
65
66     // --------------------------------------------------------- Public Methods
67
68
69     /**
70      * Execute the specified command. This logic only performs the common
71      * attribute validation required by all subclasses; it does not perform
72      * any functional logic directly.
73      *
74      * @exception BuildException if a validation error occurs
75      */
76     public void execute() throws BuildException {
77
78         if (path == null) {
79             throw new BuildException("Must specify 'path'");
80         }
81
82         File JavaDoc file = new File JavaDoc(path, Constants.ApplicationWebXml);
83         if ((!file.exists()) || (!file.canRead())) {
84             throw new BuildException("Cannot find web.xml");
85         }
86
87         // Commons-logging likes having the context classloader set
88 ClassLoader JavaDoc oldCL = Thread.currentThread().getContextClassLoader();
89         Thread.currentThread().setContextClassLoader
90             (ValidatorTask.class.getClassLoader());
91
92         Digester digester = DigesterFactory.newDigester(true, true, null);
93         try {
94             file = file.getCanonicalFile();
95             InputStream JavaDoc stream =
96                 new BufferedInputStream JavaDoc(new FileInputStream JavaDoc(file));
97             InputSource JavaDoc is = new InputSource JavaDoc(file.toURL().toExternalForm());
98             is.setByteStream(stream);
99             digester.parse(is);
100             handleOutput("web.xml validated");
101         } catch (Throwable JavaDoc t) {
102             if (isFailOnError()) {
103                 throw new BuildException("Validation failure", t);
104             } else {
105                 handleErrorOutput("Validation failure: " + t);
106             }
107         } finally {
108             Thread.currentThread().setContextClassLoader(oldCL);
109             closeRedirector();
110         }
111
112     }
113
114
115 }
116
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