1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.jexl3.parser;
18
19 /**
20 * Array access supporting (optional) safe notation.
21 */
22 public class ASTArrayAccess extends JexlLexicalNode {
23 private static final long serialVersionUID = 1L;
24
25 /** Which children are accessed using a safe notation.
26 * Note that this does not really work after the 64th child.
27 * However, an expression like 'a?[b]?[c]?...?[b0]' with 64 terms is very unlikely
28 * to occur in real life and a bad idea anyhow.
29 */
30 private long safe;
31
32 public ASTArrayAccess(final int id) {
33 super(id);
34 }
35
36 public ASTArrayAccess(final Parser p, final int id) {
37 super(id);
38 }
39
40 public boolean isSafeChild(final int c) {
41 return (safe & 1L << c) != 0;
42 }
43
44 @Override
45 public boolean isSafeLhs(final boolean safe) {
46 return isSafeChild(0) || super.isSafeLhs(safe);
47 }
48
49 @Override
50 public Object jjtAccept(final ParserVisitor visitor, final Object data) {
51 return visitor.visit(this, data);
52 }
53
54 void setSafe(final long s) {
55 this.safe = s;
56 }
57 }