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;
018
019import javax.xml.bind.annotation.XmlAccessType;
020import javax.xml.bind.annotation.XmlAccessorType;
021import javax.xml.bind.annotation.XmlElementRef;
022import javax.xml.bind.annotation.XmlRootElement;
023import javax.xml.bind.annotation.XmlTransient;
024
025import org.apache.camel.Expression;
026import org.apache.camel.Predicate;
027import org.apache.camel.model.language.ExpressionDefinition;
028import org.apache.camel.spi.RouteContext;
029
030/**
031 * Represents an expression sub element
032 */
033@XmlRootElement(name = "expression") // must be named expression
034@XmlAccessorType(XmlAccessType.FIELD)
035public class ExpressionSubElementDefinition {
036    @XmlElementRef
037    private ExpressionDefinition expressionType;
038    @XmlTransient
039    private Expression expression;
040    @XmlTransient
041    private Predicate predicate;
042
043    public ExpressionSubElementDefinition() {
044    }
045
046    public ExpressionSubElementDefinition(Expression expression) {
047        this.expression = expression;
048    }
049
050    public ExpressionSubElementDefinition(Predicate predicate) {
051        this.predicate = predicate;
052    }   
053    
054    public ExpressionDefinition getExpressionType() {
055        return expressionType;
056    }
057
058    public void setExpressionType(ExpressionDefinition expressionType) {
059        this.expressionType = expressionType;
060    }
061
062    public Expression getExpression() {
063        return expression;
064    }   
065    
066    public void setExpression(Expression expression) {
067        this.expression = expression;
068    }
069
070    public void setPredicate(Predicate predicate) {
071        this.predicate = predicate;
072    }
073
074    public Predicate getPredicate() {
075        return predicate;
076    }    
077    
078    public Expression createExpression(RouteContext routeContext) {
079        ExpressionDefinition expressionType = getExpressionType();
080        if (expressionType != null && expression == null) {
081            expression = expressionType.createExpression(routeContext);
082        }
083        return expression;
084    }
085    
086    public Predicate createPredicate(RouteContext routeContext) {
087        ExpressionDefinition expressionType = getExpressionType();
088        if (expressionType != null && getPredicate() == null) {
089            setPredicate(expressionType.createPredicate(routeContext));
090        }
091        return getPredicate();
092    }
093
094    @Override
095    public String toString() {
096        if (expression != null) {
097            return expression.toString();
098        } else if (expressionType != null) {
099            return expressionType.toString();
100        } else if (predicate != null) {
101            return predicate.toString();
102        }
103        return super.toString();
104    }
105}
106