001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.impl;
018    
019    import java.util.HashMap;
020    import java.util.Map;
021    
022    import org.apache.camel.NoSuchBeanException;
023    import org.apache.camel.spi.Registry;
024    
025    /**
026     * A {@link Map}-based registry.
027     */
028    public class SimpleRegistry extends HashMap<String, Object> implements Registry {
029    
030        private static final long serialVersionUID = -3739035212761568984L;
031    
032        public Object lookup(String name) {
033            return get(name);
034        }
035    
036        public <T> T lookup(String name, Class<T> type) {
037            Object answer = lookup(name);
038    
039            // just to be safe
040            if (answer == null) {
041                return null;
042            }
043    
044            try {
045                return type.cast(answer);
046            } catch (Throwable e) {
047                String msg = "Found bean: " + name + " in SimpleRegistry: " + this
048                        + " of type: " + answer.getClass().getName() + " expected type was: " + type;
049                throw new NoSuchBeanException(name, msg, e);
050            }
051        }
052    
053        public <T> Map<String, T> lookupByType(Class<T> type) {
054            Map<String, T> result = new HashMap<String, T>();
055            for (Map.Entry<String, Object> entry : entrySet()) {
056                if (type.isInstance(entry.getValue())) {
057                    result.put(entry.getKey(), type.cast(entry.getValue()));
058                }
059            }
060            return result;
061        }
062        
063    }