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.Component; 020 import org.apache.camel.Exchange; 021 import org.apache.camel.Processor; 022 import org.apache.camel.component.validator.ValidatorComponent; 023 import org.apache.camel.impl.ProcessorEndpoint; 024 import org.apache.commons.logging.Log; 025 import org.apache.commons.logging.LogFactory; 026 import org.springframework.core.io.DefaultResourceLoader; 027 import org.springframework.core.io.Resource; 028 import org.springframework.core.io.ResourceLoader; 029 030 /** 031 * A useful base class for endpoints which depend on a resource 032 * such as things like Velocity or XQuery based components 033 * 034 * @version $Revision: 630591 $ 035 */ 036 public abstract class ResourceBasedEndpoint extends ProcessorEndpoint { 037 protected static final transient Log LOG = LogFactory.getLog(ValidatorComponent.class); 038 private ResourceLoader resourceLoader = new DefaultResourceLoader(); 039 private final String resourceUri; 040 private Resource resource; 041 042 public ResourceBasedEndpoint(String endpointUri, Component component, String resourceUri, Processor processor) { 043 super(endpointUri, component, processor); 044 this.resourceUri = resourceUri; 045 } 046 public Resource getResource() { 047 if (resource == null) { 048 resource = getResourceLoader().getResource(resourceUri); 049 if (resource == null) { 050 throw new IllegalArgumentException("Could not find resource for URI: " + resourceUri + " using: " + getResourceLoader()); 051 } 052 } 053 return resource; 054 } 055 056 public ResourceLoader getResourceLoader() { 057 return resourceLoader; 058 } 059 060 public void setResourceLoader(ResourceLoader resourceLoader) { 061 this.resourceLoader = resourceLoader; 062 } 063 }