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 public final class ASTArrayLiteral extends JexlNode implements JexlNode.Literal<Object> {
020 /** The type literal value. */
021 Object array = null;
022 /** Whether this array is constant or not. */
023 boolean constant = false;
024
025 ASTArrayLiteral(int id) {
026 super(id);
027 }
028
029 ASTArrayLiteral(Parser p, int id) {
030 super(p, id);
031 }
032
033
034 /** {@inheritDoc} */
035 @Override
036 public void jjtClose() {
037 if (children == null || children.length == 0) {
038 array = new Object[0];
039 constant = true;
040 } else {
041 constant = isConstant();
042 }
043 }
044
045 /**
046 * Gets the literal value.
047 * @return the array literal
048 */
049 public Object getLiteral() {
050 return array;
051 }
052
053 /**
054 * Sets the literal value only if the descendants of this node compose a constant
055 * @param literal the literal array value
056 * @throws IllegalArgumentException if literal is not an array or null
057 */
058 public void setLiteral(Object literal) {
059 if (constant) {
060 if (literal != null && !literal.getClass().isArray()) {
061 throw new IllegalArgumentException(literal.getClass() + " is not an array");
062 }
063 this.array = literal;
064 }
065 }
066
067 /** {@inheritDoc} */
068 @Override
069 public Object jjtAccept(ParserVisitor visitor, Object data) {
070 return visitor.visit(this, data);
071 }
072 }