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 java.util.Collections;
020    import java.util.List;
021    import javax.xml.bind.annotation.XmlAccessType;
022    import javax.xml.bind.annotation.XmlAccessorType;
023    
024    import org.apache.camel.Expression;
025    import org.apache.camel.Predicate;
026    import org.apache.camel.model.language.ExpressionDefinition;
027    
028    /**
029     * An {@link org.apache.camel.model.ExpressionNode} which does <b>not</b> support any outputs.
030     * <p/>
031     * This node is to be extended by definitions which need to support an expression but the definition should not
032     * contain any outputs, such as {@link org.apache.camel.model.TransformDefinition}.
033     *
034     * @version 
035     */
036    @XmlAccessorType(XmlAccessType.FIELD)
037    public class NoOutputExpressionNode extends ExpressionNode {
038    
039        public NoOutputExpressionNode() {
040        }
041    
042        public NoOutputExpressionNode(ExpressionDefinition expression) {
043            super(expression);
044        }
045    
046        public NoOutputExpressionNode(Expression expression) {
047            super(expression);
048        }
049    
050        public NoOutputExpressionNode(Predicate predicate) {
051            super(predicate);
052        }
053    
054        @Override
055        public List<ProcessorDefinition<?>> getOutputs() {
056            return Collections.emptyList();
057        }
058    
059        @Override
060        public boolean isOutputSupported() {
061            return false;
062        }
063    
064        @Override
065        public void addOutput(ProcessorDefinition<?> output) {
066            // add it to the parent as we do not support outputs
067            getParent().addOutput(output);
068        }
069    
070    }