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 }