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1   package org.apache.maven.plugin.changes.schema;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *    http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import java.io.File;
23  import java.io.FileReader;
24  import java.io.IOException;
25  import java.io.InputStream;
26  import java.util.Map;
27  
28  import javax.xml.transform.stream.StreamSource;
29  import javax.xml.validation.Schema;
30  import javax.xml.validation.SchemaFactory;
31  import javax.xml.validation.Validator;
32  
33  import org.codehaus.plexus.util.FastMap;
34  import org.xml.sax.SAXException;
35  
36  /**
37   *
38   * @author <a href="mailto:olamy@apache.org">olamy</a>
39   * @since 28 juil. 2008
40   * @version $Id: DefaultChangesSchemaValidator.html 816592 2012-05-08 12:40:21Z hboutemy $
41   *
42   * @plexus.component role="org.apache.maven.plugin.changes.schema.ChangesSchemaValidator" role-hint="default"
43   */
44  public class DefaultChangesSchemaValidator
45      implements ChangesSchemaValidator
46  {
47  
48      /** property schema */
49      public static final String W3C_XML_SCHEMA = "http://www.w3.org/2001/XMLSchema";
50  
51      public static final String CHANGES_SCHEMA_PATH = "META-INF/changes/xsd/";
52  
53      private Map compiledSchemas = new FastMap();
54  
55      public XmlValidationHandler validateXmlWithSchema( File file, String schemaVersion, boolean failOnValidationError )
56          throws SchemaValidatorException
57      {
58          try
59          {
60              String schemaPath = CHANGES_SCHEMA_PATH + "changes-" + schemaVersion + ".xsd";
61  
62              Schema schema = getSchema( schemaPath );
63  
64              Validator validator = schema.newValidator();
65  
66              XmlValidationHandler baseHandler = new XmlValidationHandler( failOnValidationError );
67  
68              validator.setErrorHandler( baseHandler );
69  
70              validator.validate( new StreamSource( new FileReader( file ) ) );
71  
72              return baseHandler;
73          }
74          catch ( IOException e )
75          {
76              throw new SchemaValidatorException( "IOException : " + e.getMessage(), e );
77          }
78          catch ( SAXException e )
79          {
80              throw new SchemaValidatorException( "SAXException : " + e.getMessage(), e );
81          }
82          catch ( Exception e )
83          {
84              throw new SchemaValidatorException( "Exception : " + e.getMessage(), e );
85          }
86      }
87  
88      public Schema getSchema( String schemaPath )
89          throws SAXException
90      {
91          if ( this.compiledSchemas.containsKey( schemaPath ) )
92          {
93              return (Schema) this.compiledSchemas.get( schemaPath );
94          }
95          Schema schema = this.compileJAXPSchema( schemaPath );
96  
97          this.compiledSchemas.put( schemaPath, schema );
98  
99          return schema;
100     }
101 
102     /**
103      * @param uriSchema
104      * @return Schema
105      * @throws Exception
106      */
107     private Schema compileJAXPSchema( String uriSchema )
108         throws SAXException, NullPointerException
109     {
110 
111         InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream( uriSchema );
112 
113         if ( is == null )
114         {
115             throw new NullPointerException( " impossible to load schema with path " + uriSchema );
116         }
117 
118         //newInstance de SchemaFactory not ThreadSafe
119         return SchemaFactory.newInstance( W3C_XML_SCHEMA ).newSchema( new StreamSource( is ) );
120 
121     }
122 
123     /**
124      * @see com.accor.commons.xmlschemas.SchemaValidator#loadSchema(java.lang.String)
125      */
126     public void loadSchema( String uriSchema )
127         throws SchemaValidatorException
128     {
129         try
130         {
131             this.getSchema( uriSchema );
132         }
133         catch ( SAXException e )
134         {
135             throw new SchemaValidatorException( "SAXException : " + e.getMessage(), e );
136         }
137 
138     }
139 
140 
141 }