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 javax.xml.bind.annotation.XmlRootElement;
020    
021    import org.apache.camel.Predicate;
022    import org.apache.camel.model.language.ExpressionDefinition;
023    import org.apache.camel.processor.FilterProcessor;
024    import org.apache.camel.spi.RouteContext;
025    
026    /**
027     * Represents an XML <when/> element
028     * 
029     * @version 
030     */
031    @XmlRootElement(name = "when")
032    public class WhenDefinition extends ExpressionNode {
033    
034        public WhenDefinition() {
035        }
036    
037        public WhenDefinition(Predicate predicate) {
038            super(predicate);
039        }
040    
041        public WhenDefinition(ExpressionDefinition expression) {
042            super(expression);
043        }
044    
045        @Override
046        public String toString() {
047            return "When[" + description() + " -> " + getOutputs() + "]";
048        }
049    
050        protected String description() {
051            StringBuilder sb = new StringBuilder();
052            if (getExpression() != null) {
053                String language = getExpression().getLanguage();
054                if (language != null) {
055                    sb.append(language).append("{");
056                }
057                sb.append(getExpression().getLabel());
058                if (language != null) {
059                    sb.append("}");
060                }
061            }
062            return sb.toString();
063        }
064    
065        @Override
066        public String getShortName() {
067            return "when";
068        }
069        
070        @Override
071        public String getLabel() {
072            return "when[" + description() + "]";
073        }
074    
075        @Override
076        public FilterProcessor createProcessor(RouteContext routeContext) throws Exception {
077            return createFilterProcessor(routeContext);
078        }
079    
080        @Override
081        public ProcessorDefinition<?> endParent() {
082            // when using when in the DSL we don't want to end back to this when, but instead
083            // the parent of this, so return the parent
084            return this.getParent();
085        }
086    }