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.model;
018
019 import java.util.ArrayList;
020 import java.util.List;
021
022 import javax.xml.bind.annotation.XmlAccessType;
023 import javax.xml.bind.annotation.XmlAccessorType;
024 import javax.xml.bind.annotation.XmlElementRef;
025
026 import org.apache.camel.Expression;
027 import org.apache.camel.Predicate;
028 import org.apache.camel.Processor;
029 import org.apache.camel.model.language.ExpressionDefinition;
030 import org.apache.camel.processor.FilterProcessor;
031 import org.apache.camel.spi.RouteContext;
032
033 /**
034 * A base class for nodes which contain an expression and a number of outputs
035 *
036 * @version $Revision: 750806 $
037 */
038 @XmlAccessorType(XmlAccessType.FIELD)
039 public class ExpressionNode extends ProcessorDefinition<ProcessorDefinition> {
040 @XmlElementRef
041 private ExpressionDefinition expression;
042 @XmlElementRef
043 private List<ProcessorDefinition> outputs = new ArrayList<ProcessorDefinition>();
044
045 public ExpressionNode() {
046 }
047
048 public ExpressionNode(ExpressionDefinition expression) {
049 this.expression = expression;
050 }
051
052 public ExpressionNode(Expression expression) {
053 if (expression != null) {
054 setExpression(new ExpressionDefinition(expression));
055 }
056 }
057
058 public ExpressionNode(Predicate predicate) {
059 if (predicate != null) {
060 setExpression(new ExpressionDefinition(predicate));
061 }
062 }
063
064 @Override
065 public String getShortName() {
066 return "exp";
067 }
068
069 public ExpressionDefinition getExpression() {
070 return expression;
071 }
072
073 public void setExpression(ExpressionDefinition expression) {
074 this.expression = expression;
075 }
076
077 public List<ProcessorDefinition> getOutputs() {
078 return outputs;
079 }
080
081 public void setOutputs(List<ProcessorDefinition> outputs) {
082 this.outputs = outputs;
083 }
084
085 @Override
086 public String getLabel() {
087 if (getExpression() == null) {
088 return "";
089 }
090 return getExpression().getLabel();
091 }
092
093 protected FilterProcessor createFilterProcessor(RouteContext routeContext) throws Exception {
094 Processor childProcessor = routeContext.createProcessor(this);
095 return new FilterProcessor(getExpression().createPredicate(routeContext), childProcessor);
096 }
097
098 @Override
099 protected void configureChild(ProcessorDefinition output) {
100 super.configureChild(output);
101 if (isInheritErrorHandler()) {
102 output.setErrorHandlerBuilder(getErrorHandlerBuilder());
103 }
104 }
105 }