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