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 */ 017package org.apache.camel.model.language; 018 019import javax.xml.bind.annotation.XmlAccessType; 020import javax.xml.bind.annotation.XmlAccessorType; 021import javax.xml.bind.annotation.XmlAttribute; 022import javax.xml.bind.annotation.XmlRootElement; 023import javax.xml.bind.annotation.XmlTransient; 024 025import org.apache.camel.CamelContext; 026import org.apache.camel.Expression; 027import org.apache.camel.Predicate; 028import org.apache.camel.RuntimeCamelException; 029import org.apache.camel.builder.SimpleBuilder; 030import org.apache.camel.spi.Metadata; 031 032/** 033 * To use Camels built-in Simple language in Camel expressions or predicates. 034 */ 035@Metadata(firstVersion = "1.1.0", label = "language,core,java", title = "Simple") 036@XmlRootElement(name = "simple") 037@XmlAccessorType(XmlAccessType.FIELD) 038public class SimpleExpression extends ExpressionDefinition { 039 @XmlAttribute(name = "resultType") 040 private String resultTypeName; 041 @XmlTransient 042 private Class<?> resultType; 043 044 public SimpleExpression() { 045 } 046 047 public SimpleExpression(String expression) { 048 super(expression); 049 } 050 051 public SimpleExpression(Expression expression) { 052 super(expression); 053 } 054 055 @Override 056 public String getLanguage() { 057 return "simple"; 058 } 059 060 public Class<?> getResultType() { 061 return resultType; 062 } 063 064 /** 065 * Sets the class of the result type (type from output) 066 */ 067 public void setResultType(Class<?> resultType) { 068 this.resultType = resultType; 069 } 070 071 public String getResultTypeName() { 072 return resultTypeName; 073 } 074 075 /** 076 * Sets the class name of the result type (type from output) 077 */ 078 public void setResultTypeName(String resultTypeName) { 079 this.resultTypeName = resultTypeName; 080 } 081 082 @Override 083 public Expression createExpression(CamelContext camelContext) { 084 if (resultType == null && resultTypeName != null) { 085 try { 086 resultType = camelContext.getClassResolver().resolveMandatoryClass(resultTypeName); 087 } catch (ClassNotFoundException e) { 088 throw RuntimeCamelException.wrapRuntimeCamelException(e); 089 } 090 } 091 092 String exp = getExpression(); 093 // should be true by default 094 boolean isTrim = getTrim() == null || getTrim(); 095 if (exp != null && isTrim) { 096 exp = exp.trim(); 097 } 098 099 SimpleBuilder answer = new SimpleBuilder(exp); 100 answer.setResultType(resultType); 101 return answer; 102 } 103 104 @Override 105 public Predicate createPredicate(CamelContext camelContext) { 106 // SimpleBuilder is also a Predicate 107 return (Predicate)createExpression(camelContext); 108 } 109}