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1   package org.apache.commons.digester3.annotations.handlers;
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.lang.reflect.AnnotatedElement;
23  import java.lang.reflect.Constructor;
24  
25  import org.apache.commons.digester3.annotations.AnnotationHandler;
26  import org.apache.commons.digester3.annotations.rules.ObjectCreate;
27  import org.apache.commons.digester3.binder.ObjectCreateBuilder;
28  import org.apache.commons.digester3.binder.RulesBinder;
29  
30  /**
31   * {@link ObjectCreateHandler} handler.
32   *
33   * @since 3.0
34   */
35  public final class ObjectCreateHandler
36      implements AnnotationHandler<ObjectCreate, AnnotatedElement>
37  {
38  
39      /**
40       * {@inheritDoc}
41       */
42      public void handle( ObjectCreate annotation, AnnotatedElement element, RulesBinder rulesBinder )
43      {
44          Class<?> type = null;
45          if ( element instanceof Class<?> )
46          {
47              type = (Class<?>) element;
48          }
49          else if ( element instanceof Constructor<?> )
50          {
51              type = ( (Constructor<?>) element ).getDeclaringClass();
52          }
53          else
54          {
55              rulesBinder.addError( "Misplaced @ObjectCreate annotation to %s, Class and Constructor only supported",
56                                    element );
57              return;
58          }
59  
60          ObjectCreateBuilder builder = rulesBinder
61                  .forPattern( annotation.pattern() )
62                  .withNamespaceURI( annotation.namespaceURI() )
63                  .createObject()
64                  .ofType( type )
65                  .ofTypeSpecifiedByAttribute( annotation.attributeName() != null ? annotation.attributeName() : null );
66  
67          if ( element instanceof Constructor<?> )
68          {
69              Constructor<?> method = (Constructor<?>) element;
70              builder.usingConstructor( method.getParameterTypes() );
71          }
72      }
73  
74  }