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.builder.SimpleBuilder;
029import org.apache.camel.util.ObjectHelper;
030
031/**
032 * For expressions and predicates using the
033 * <a href="http://camel.apache.org/simple.html">simple language</a>
034 *
035 * @version 
036 */
037@XmlRootElement(name = "simple")
038@XmlAccessorType(XmlAccessType.FIELD)
039public class SimpleExpression extends ExpressionDefinition {
040    @XmlAttribute(name = "resultType")
041    private String resultTypeName;
042    @XmlTransient
043    private Class<?> resultType;
044
045    public SimpleExpression() {
046    }
047
048    public SimpleExpression(String expression) {
049        super(expression);
050    }
051
052    public SimpleExpression(Expression expression) {
053        super(expression);
054    }
055
056    public String getLanguage() {
057        return "simple";
058    }
059
060    public Class<?> getResultType() {
061        return resultType;
062    }
063
064    public void setResultType(Class<?> resultType) {
065        this.resultType = resultType;
066    }
067
068    public String getResultTypeName() {
069        return resultTypeName;
070    }
071
072    public void setResultTypeName(String resultTypeName) {
073        this.resultTypeName = resultTypeName;
074    }
075
076    @Override
077    public Expression createExpression(CamelContext camelContext) {
078        if (resultType == null && resultTypeName != null) {
079            try {
080                resultType = camelContext.getClassResolver().resolveMandatoryClass(resultTypeName);
081            } catch (ClassNotFoundException e) {
082                throw ObjectHelper.wrapRuntimeCamelException(e);
083            }
084        }
085
086        String exp = getExpression();
087        if (isTrim() && exp != null) {
088            exp = exp.trim();
089        }
090
091        SimpleBuilder answer = new SimpleBuilder(exp);
092        answer.setResultType(resultType);
093        return answer;
094    }
095
096    @Override
097    public Predicate createPredicate(CamelContext camelContext) {
098        // SimpleBuilder is also a Predicate
099        return (Predicate) createExpression(camelContext);
100    }
101}