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 org.apache.camel.Expression;
020import org.apache.camel.builder.ExpressionBuilder;
021import org.apache.camel.language.simple.types.SimpleToken;
022
023/**
024 * Starts a block enclosed by double quotes
025 */
026public class DoubleQuoteStart extends BaseSimpleNode implements BlockStart {
027
028    private final CompositeNodes block;
029
030    public DoubleQuoteStart(SimpleToken token) {
031        super(token);
032        this.block = new CompositeNodes(token);
033    }
034
035    @Override
036    public String toString() {
037        // output a nice toString so it makes debugging easier as we can see the entire block
038        return "\"" + block + "\"";
039    }
040
041    @Override
042    public Expression createExpression(String expression) {
043        Expression answer = null;
044        if (block != null) {
045            answer = block.createExpression(expression);
046        }
047        if (answer == null) {
048            // there quoted literal is empty
049            answer = ExpressionBuilder.constantExpression("");
050        }
051        return answer;
052    }
053
054    @Override
055    public boolean acceptAndAddNode(SimpleNode node) {
056        block.addChild(node);
057        return true;
058    }
059
060}