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.language.simple.ast; 018 019import java.util.ArrayList; 020import java.util.List; 021 022import org.apache.camel.Expression; 023import org.apache.camel.builder.ExpressionBuilder; 024import org.apache.camel.language.simple.types.SimpleToken; 025 026/** 027 * A node which contains other {@link SimpleNode nodes}. 028 */ 029public class CompositeNodes extends BaseSimpleNode { 030 031 private final List<SimpleNode> children = new ArrayList<SimpleNode>(); 032 033 public CompositeNodes(SimpleToken token) { 034 super(token); 035 } 036 037 @Override 038 public String toString() { 039 StringBuilder sb = new StringBuilder(); 040 for (SimpleNode child : children) { 041 sb.append(child.toString()); 042 } 043 return sb.toString(); 044 } 045 046 public void addChild(SimpleNode child) { 047 children.add(child); 048 } 049 050 public List<SimpleNode> getChildren() { 051 return children; 052 } 053 054 @Override 055 public Expression createExpression(String expression) { 056 if (children.isEmpty()) { 057 return null; 058 } else if (children.size() == 1) { 059 return children.get(0).createExpression(expression); 060 } else { 061 List<Expression> answer = new ArrayList<Expression>(); 062 for (SimpleNode child : children) { 063 answer.add(child.createExpression(expression)); 064 } 065 return ExpressionBuilder.concatExpression(answer); 066 } 067 } 068 069}