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.spring.handler;
018    
019    import org.apache.camel.util.ObjectHelper;
020    
021    /**
022     * A {@link BeanDefinitionParser} which lazy loads the type on which it creates to allow the schema to be loosly coupled
023     * with the camel jars.
024     *
025     * @version $Revision: 630591 $
026     */
027    public class LazyLoadingBeanDefinitionParser extends BeanDefinitionParser {
028        private String className;
029        private String moduleName;
030    
031        public LazyLoadingBeanDefinitionParser(String className, String moduleName) {
032            this.className = className;
033            this.moduleName = moduleName;
034        }
035    
036        @Override
037        protected Class loadType() {
038            Class<?> answer = ObjectHelper.loadClass(className, getClass().getClassLoader());
039            if (answer == null) {
040                throw new IllegalArgumentException("Class: " + className + " could not be found. You need to add Camel module: " + moduleName + " to your classpath");
041            }
042            return answer;
043        }
044    }