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.language; 018 019 import javax.xml.bind.annotation.XmlAccessType; 020 import javax.xml.bind.annotation.XmlAccessorType; 021 import javax.xml.bind.annotation.XmlAttribute; 022 import javax.xml.bind.annotation.XmlID; 023 import javax.xml.bind.annotation.XmlTransient; 024 import javax.xml.bind.annotation.XmlType; 025 import javax.xml.bind.annotation.XmlValue; 026 import javax.xml.bind.annotation.adapters.CollapsedStringAdapter; 027 import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter; 028 029 import org.apache.camel.CamelContext; 030 import org.apache.camel.Exchange; 031 import org.apache.camel.Expression; 032 import org.apache.camel.Predicate; 033 import org.apache.camel.impl.RouteContext; 034 import org.apache.camel.spi.Language; 035 036 /** 037 * A useful base class for an expression 038 * 039 * @version $Revision: 1.1 $ 040 */ 041 @XmlType(name = "expressionType") 042 @XmlAccessorType(XmlAccessType.FIELD) 043 public class ExpressionType { 044 @XmlAttribute 045 @XmlJavaTypeAdapter(CollapsedStringAdapter.class) 046 @XmlID 047 private String id; 048 @XmlValue 049 private String expression; 050 @XmlTransient 051 private Predicate predicate; 052 @XmlTransient 053 private Expression expressionValue; 054 055 public ExpressionType() { 056 } 057 058 public ExpressionType(String expression) { 059 this.expression = expression; 060 } 061 062 public ExpressionType(Predicate predicate) { 063 this.predicate = predicate; 064 } 065 066 public ExpressionType(Expression expression) { 067 this.expressionValue = expression; 068 } 069 070 @Override 071 public String toString() { 072 return getLanguage() + "Expression[" + getExpression() + "]"; 073 } 074 075 public String getLanguage() { 076 return ""; 077 } 078 079 public Predicate<Exchange> createPredicate(RouteContext route) { 080 if (predicate == null) { 081 CamelContext camelContext = route.getCamelContext(); 082 Language language = camelContext.resolveLanguage(getLanguage()); 083 predicate = language.createPredicate(getExpression()); 084 } 085 return predicate; 086 } 087 088 public Expression createExpression(RouteContext routeContext) { 089 if (expressionValue == null) { 090 CamelContext camelContext = routeContext.getCamelContext(); 091 Language language = camelContext.resolveLanguage(getLanguage()); 092 expressionValue = language.createExpression(getExpression()); 093 } 094 return expressionValue; 095 } 096 097 public String getExpression() { 098 return expression; 099 } 100 101 public void setExpression(String expression) { 102 this.expression = expression; 103 } 104 105 /** 106 * Gets the value of the id property. 107 * 108 * @return possible object is 109 * {@link String } 110 */ 111 public String getId() { 112 return id; 113 } 114 115 /** 116 * Sets the value of the id property. 117 * 118 * @param value allowed object is 119 * {@link String } 120 */ 121 public void setId(String value) { 122 this.id = value; 123 } 124 }