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.XmlAccessType;
020    import javax.xml.bind.annotation.XmlAccessorType;
021    import javax.xml.bind.annotation.XmlRootElement;
022    
023    import org.apache.camel.Expression;
024    import org.apache.camel.Processor;
025    import org.apache.camel.builder.ExpressionClause;
026    import org.apache.camel.model.language.ExpressionDefinition;
027    import org.apache.camel.processor.LoopProcessor;
028    import org.apache.camel.spi.RouteContext;
029    
030    /**
031     * Represents an XML <loop/> element
032     *
033     * @version $Revision: 750806 $
034     */
035    @XmlRootElement(name = "loop")
036    @XmlAccessorType(XmlAccessType.FIELD)
037    public class LoopDefinition extends ExpressionNode implements Block {
038        public LoopDefinition() {
039        }
040    
041        public LoopDefinition(Expression expression) {
042            super(expression);
043        }
044    
045        public LoopDefinition(ExpressionDefinition expression) {
046            super(expression);
047        }
048    
049        public void setExpression(Expression expr) {
050            if (expr != null) {
051                setExpression(new ExpressionDefinition(expr));
052            }
053        }
054        
055        
056        @Override
057        public String toString() {
058            return "Loop[" + getExpression() + " -> " + getOutputs() + "]";
059        }
060        
061        @Override
062        public String getShortName() {
063            return "loop";
064        }
065    
066        @Override
067        public Processor createProcessor(RouteContext routeContext) throws Exception {
068            return new LoopProcessor(
069                getExpression().createExpression(routeContext),
070                routeContext.createProcessor(this));
071        }
072        
073         // Fluent API
074        //-------------------------------------------------------------------------
075        /**
076         * Set the expression that LoopType will use
077         * @return the builder
078         */
079        public ExpressionClause<LoopDefinition> expression() {
080            return ExpressionClause.createAndSetExpression(this);
081        }
082    }