001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    package org.apache.shiro.jndi;
020    
021    import org.apache.shiro.util.Factory;
022    
023    import javax.naming.NamingException;
024    
025    /**
026     * A factory implementation intended to be used to look up objects in jndi.
027     * @param <T>
028     * @since 1.2
029     */
030    public class JndiObjectFactory<T> extends JndiLocator implements Factory<T> {
031    
032        private String resourceName;
033        private Class<? extends T> requiredType;
034    
035        public T getInstance() {
036            try {
037                if(requiredType != null) {
038                    return requiredType.cast(this.lookup(resourceName, requiredType));
039                } else {
040                    return (T) this.lookup(resourceName);
041                }
042            } catch (NamingException e) {
043                final String typeName = requiredType != null ? requiredType.getName() : "object";
044                throw new IllegalStateException("Unable to look up " + typeName + " with jndi name '" + resourceName + "'.", e);
045            }
046        }
047    
048        public String getResourceName() {
049            return resourceName;
050        }
051    
052        public void setResourceName(String resourceName) {
053            this.resourceName = resourceName;
054        }
055    
056        public Class<? extends T> getRequiredType() {
057            return requiredType;
058        }
059    
060        public void setRequiredType(Class<? extends T> requiredType) {
061            this.requiredType = requiredType;
062        }
063    }