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.builder;
018
019 import java.util.List;
020
021 import org.apache.camel.Processor;
022 import org.apache.camel.model.OnExceptionDefinition;
023 import org.apache.camel.spi.RouteContext;
024 import org.apache.camel.util.ObjectHelper;
025
026 /**
027 * Represents a proxy to an error handler builder which is resolved by named reference
028 *
029 * @version $Revision: 751357 $
030 */
031 public class ErrorHandlerBuilderRef extends ErrorHandlerBuilderSupport {
032 private final String ref;
033 private ErrorHandlerBuilder handler;
034
035 public ErrorHandlerBuilderRef(String ref) {
036 this.ref = ref;
037 }
038
039 public ErrorHandlerBuilder copy() {
040 return new ErrorHandlerBuilderRef(ref);
041 }
042
043 @Override
044 public void addErrorHandlers(OnExceptionDefinition exception) {
045 if (handler != null) {
046 handler.addErrorHandlers(exception);
047 }
048 super.addErrorHandlers(exception);
049 }
050
051 public Processor createErrorHandler(RouteContext routeContext, Processor processor) throws Exception {
052 if (handler == null) {
053 handler = routeContext.lookup(ref, ErrorHandlerBuilder.class);
054 ObjectHelper.notNull(handler, "error handler '" + ref + "'");
055 List<OnExceptionDefinition> list = getExceptions();
056 for (OnExceptionDefinition exceptionType : list) {
057 handler.addErrorHandlers(exceptionType);
058 }
059 }
060 return handler.createErrorHandler(routeContext, processor);
061 }
062 }