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 */ 017 package org.apache.commons.jexl2.parser; 018 019 import org.apache.commons.jexl2.JexlInfo; 020 021 /** 022 * Base class for parser nodes - holds an 'image' of the token for later use. 023 * 024 * @since 2.0 025 */ 026 public abstract class JexlNode extends SimpleNode implements JexlInfo { 027 /** A marker interface for literals. 028 * @param <T> the literal type 029 */ 030 public interface Literal<T> { 031 T getLiteral(); 032 } 033 034 /** token value. */ 035 public String image; 036 037 public JexlNode(int id) { 038 super(id); 039 } 040 041 public JexlNode(Parser p, int id) { 042 super(p, id); 043 } 044 045 public JexlInfo getInfo() { 046 JexlNode node = this; 047 while (node != null) { 048 if (node.value instanceof JexlInfo) { 049 return (JexlInfo) node.value; 050 } 051 node = node.jjtGetParent(); 052 } 053 return null; 054 } 055 056 /** {@inheritDoc} */ 057 public String debugString() { 058 JexlInfo info = getInfo(); 059 return info != null? info.debugString() : ""; 060 } 061 }