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Java > Open Source Codes > org > apache > excalibur > configuration > validation > JarvConfigurationValidator


1 /*
2
3  ============================================================================
4                    The Apache Software License, Version 1.1
5  ============================================================================
6
7  Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
8
9  Redistribution and use in source and binary forms, with or without modifica-
10  tion, are permitted provided that the following conditions are met:
11
12  1. Redistributions of source code must retain the above copyright notice,
13     this list of conditions and the following disclaimer.
14
15  2. Redistributions in binary form must reproduce the above copyright notice,
16     this list of conditions and the following disclaimer in the documentation
17     and/or other materials provided with the distribution.
18
19  3. The end-user documentation included with the redistribution, if any, must
20     include the following acknowledgment: "This product includes software
21     developed by the Apache Software Foundation (http://www.apache.org/)."
22     Alternately, this acknowledgment may appear in the software itself, if
23     and wherever such third-party acknowledgments normally appear.
24
25  4. The names "Jakarta", "Avalon", "Excalibur" and "Apache Software Foundation"
26     must not be used to endorse or promote products derived from this software
27     without prior written permission. For written permission, please contact
28     apache@apache.org.
29
30  5. Products derived from this software may not be called "Apache", nor may
31     "Apache" appear in their name, without prior written permission of the
32     Apache Software Foundation.
33
34  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
35  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
36  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
37  APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
38  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
39  DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
40  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
41  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
43  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44
45  This software consists of voluntary contributions made by many individuals
46  on behalf of the Apache Software Foundation. For more information on the
47  Apache Software Foundation, please see <http://www.apache.org/>.
48
49 */

50
51 package org.apache.excalibur.configuration.validation;
52
53 import org.apache.avalon.framework.configuration.Configuration;
54 import org.apache.avalon.framework.configuration.ConfigurationException;
55 import org.apache.avalon.framework.configuration.DefaultConfiguration;
56 import org.apache.avalon.framework.configuration.DefaultConfigurationSerializer;
57 import org.iso_relax.verifier.Schema;
58 import org.iso_relax.verifier.Verifier;
59 import org.iso_relax.verifier.VerifierConfigurationException;
60 import org.iso_relax.verifier.VerifierHandler;
61 import org.xml.sax.ErrorHandler JavaDoc;
62 import org.xml.sax.SAXException JavaDoc;
63 import org.xml.sax.SAXParseException JavaDoc;
64
65 /**
66  *
67  * @author <a HREF="proyal@apache.org">peter royal</a>
68  */

69 public class JarvConfigurationValidator implements ConfigurationValidator
70 {
71     private final DefaultConfigurationSerializer m_serializer =
72         new DefaultConfigurationSerializer();
73
74     private final Schema m_schema;
75
76     public JarvConfigurationValidator( Schema schema )
77     {
78         m_schema = schema;
79     }
80
81     public ValidationResult isFeasiblyValid( Configuration configuration )
82         throws ConfigurationException
83     {
84         final ValidationResult result = new ValidationResult();
85
86         result.setResult( true );
87
88         return result;
89     }
90
91     public ValidationResult isValid( Configuration configuration )
92         throws ConfigurationException
93     {
94         final ValidationResult result = new ValidationResult();
95         final DefaultConfiguration branched =
96             new DefaultConfiguration( "root", configuration.getLocation() );
97         branched.addAll( configuration );
98         branched.makeReadOnly();
99
100         try
101         {
102             final Verifier verifier = m_schema.newVerifier();
103             final VerifierHandler handler = verifier.getVerifierHandler();
104
105             verifier.setErrorHandler( new ErrorHandler JavaDoc()
106             {
107                 public void warning( SAXParseException JavaDoc exception )
108                     throws SAXException JavaDoc
109                 {
110                     result.addWarning( exception.getMessage() );
111                 }
112
113                 public void error( SAXParseException JavaDoc exception )
114                     throws SAXException JavaDoc
115                 {
116                     result.addError( exception.getMessage() );
117                 }
118
119                 public void fatalError( final SAXParseException JavaDoc exception )
120                     throws SAXException JavaDoc
121                 {
122                     result.addError( exception.getMessage() );
123                 }
124             } );
125
126             m_serializer.serialize( handler, branched );
127
128             result.setResult( handler.isValid() );
129
130             return result;
131         }
132         catch( final VerifierConfigurationException e )
133         {
134             final String JavaDoc message = "Unable to verify configuration";
135             throw new ConfigurationException( message, e );
136         }
137         catch( final SAXException JavaDoc e )
138         {
139             final String JavaDoc message = "Unable to parse configuration";
140             throw new ConfigurationException( message, e );
141         }
142         catch( final IllegalStateException JavaDoc e )
143         {
144             final String JavaDoc message = "Unable to parse configuration";
145             throw new ConfigurationException( message, e );
146         }
147     }
148 }
149
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