001    /**
002     *
003     * Licensed to the Apache Software Foundation (ASF) under one or more
004     * contributor license agreements.  See the NOTICE file distributed with
005     * this work for additional information regarding copyright ownership.
006     * The ASF licenses this file to You under the Apache License, Version 2.0
007     * (the "License"); you may not use this file except in compliance with
008     * 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, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    package org.apache.camel.spring.xml;
019    
020    import org.apache.camel.util.ObjectHelper;
021    
022    /**
023     * A {@link BeanDefinitionParser} which lazy loads the type on which it creates to allow the schema to be loosly coupled
024     * with the camel jars.
025     *
026     * @version $Revision: 1.1 $
027     */
028    public class LazyLoadingBeanDefinitionParser extends BeanDefinitionParser {
029        private String className;
030        private String moduleName;
031    
032        public LazyLoadingBeanDefinitionParser(String className, String moduleName) {
033            this.className = className;
034            this.moduleName = moduleName;
035        }
036    
037        @Override
038        protected Class loadType() {
039            Class<?> answer = ObjectHelper.loadClass(className, getClass().getClassLoader());
040            if (answer == null) {
041                throw new IllegalArgumentException("Class: " + className + " could not be found. You need to add Camel module: " + moduleName + " to your classpath");
042            }
043            return answer;
044        }
045    }