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 java.util.Collections;
020import java.util.List;
021import javax.xml.bind.annotation.XmlAccessType;
022import javax.xml.bind.annotation.XmlAccessorType;
023
024import org.apache.camel.Expression;
025import org.apache.camel.Predicate;
026import 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)
037public 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    @Override
071    public ExpressionNode id(String id) {
072        // let parent handle assigning the id, as we do not support outputs
073        getParent().id(id);
074        return this;
075    }
076}
077