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.component;
018    
019    import org.apache.camel.Exchange;
020    import org.apache.camel.component.validator.ValidatorComponent;
021    import org.apache.camel.impl.DefaultComponent;
022    import org.apache.commons.logging.Log;
023    import org.apache.commons.logging.LogFactory;
024    
025    import org.springframework.core.io.DefaultResourceLoader;
026    import org.springframework.core.io.Resource;
027    import org.springframework.core.io.ResourceLoader;
028    
029    /**
030     * @version $Revision: 630591 $
031     */
032    public abstract class ResourceBasedComponent extends DefaultComponent<Exchange> {
033        protected static final transient Log LOG = LogFactory.getLog(ValidatorComponent.class);
034        private ResourceLoader resourceLoader = new DefaultResourceLoader();
035    
036        public ResourceLoader getResourceLoader() {
037            return resourceLoader;
038        }
039    
040        public void setResourceLoader(ResourceLoader resourceLoader) {
041            this.resourceLoader = resourceLoader;
042        }
043    
044        protected Resource resolveMandatoryResource(String uri) {
045            Resource resource = getResourceLoader().getResource(uri);
046            if (resource == null) {
047                throw new IllegalArgumentException("Could not find resource for URI: " + uri + " using: " + getResourceLoader());
048            } else {
049                return resource;
050            }
051    
052        }
053    }