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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.shiro.jndi;
20  
21  import org.apache.shiro.util.Factory;
22  
23  import javax.naming.NamingException;
24  
25  /**
26   * A factory implementation intended to be used to look up objects in jndi.
27   * @param <T>
28   * @since 1.2
29   */
30  public class JndiObjectFactory<T> extends JndiLocator implements Factory<T> {
31  
32      private String resourceName;
33      private Class<? extends T> requiredType;
34  
35      public T getInstance() {
36          try {
37              if(requiredType != null) {
38                  return requiredType.cast(this.lookup(resourceName, requiredType));
39              } else {
40                  return (T) this.lookup(resourceName);
41              }
42          } catch (NamingException e) {
43              final String typeName = requiredType != null ? requiredType.getName() : "object";
44              throw new IllegalStateException("Unable to look up " + typeName + " with jndi name '" + resourceName + "'.", e);
45          }
46      }
47  
48      public String getResourceName() {
49          return resourceName;
50      }
51  
52      public void setResourceName(String resourceName) {
53          this.resourceName = resourceName;
54      }
55  
56      public Class<? extends T> getRequiredType() {
57          return requiredType;
58      }
59  
60      public void setRequiredType(Class<? extends T> requiredType) {
61          this.requiredType = requiredType;
62      }
63  }