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    }