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;
021
022import javax.xml.bind.annotation.XmlAccessType;
023import javax.xml.bind.annotation.XmlAccessorType;
024
025import org.apache.camel.Expression;
026import org.apache.camel.Predicate;
027import org.apache.camel.model.language.ExpressionDefinition;
028
029/**
030 * An {@link org.apache.camel.model.ExpressionNode} which does <b>not</b> support any outputs.
031 * <p/>
032 * This node is to be extended by definitions which need to support an expression but the definition should not
033 * contain any outputs, such as {@link org.apache.camel.model.TransformDefinition}.
034 *
035 * @version 
036 */
037@XmlAccessorType(XmlAccessType.FIELD)
038public abstract class NoOutputExpressionNode extends ExpressionNode {
039
040    public NoOutputExpressionNode() {
041    }
042
043    public NoOutputExpressionNode(ExpressionDefinition expression) {
044        super(expression);
045    }
046
047    public NoOutputExpressionNode(Expression expression) {
048        super(expression);
049    }
050
051    public NoOutputExpressionNode(Predicate predicate) {
052        super(predicate);
053    }
054
055    @Override
056    public List<ProcessorDefinition<?>> getOutputs() {
057        return Collections.emptyList();
058    }
059
060    @Override
061    public boolean isOutputSupported() {
062        return false;
063    }
064
065    @Override
066    public void addOutput(ProcessorDefinition<?> output) {
067        // add it to the parent as we do not support outputs
068        getParent().addOutput(output);
069    }
070
071    @Override
072    public ExpressionNode id(String id) {
073        // let parent handle assigning the id, as we do not support outputs
074        getParent().id(id);
075        return this;
076    }
077}
078