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 import java.util.Objects;
20 import java.util.regex.Pattern;
21 import java.util.regex.PatternSyntaxException;
22
23 import org.apache.commons.jexl3.JexlException;
24
25 public final class ASTRegexLiteral extends JexlNode implements JexlNode.Constant<Pattern> {
26
27 /**
28 */
29 private static final long serialVersionUID = 1L;
30
31 /** The actual literal value; the inherited 'value' member may host a cached getter. */
32
33 private Pattern literal;
34
35 ASTRegexLiteral(final int id) {
36 super(id);
37 }
38
39 /**
40 * Gets the literal value.
41 *
42 * @return The Pattern literal
43 */
44 @Override
45 public Pattern getLiteral() {
46 return this.literal;
47 }
48
49 @Override
50 protected boolean isConstant(final boolean literal) {
51 return true;
52 }
53
54 @Override
55 public Object jjtAccept(final ParserVisitor visitor, final Object data) {
56 return visitor.visit(this, data);
57 }
58
59 void setLiteral(final String literal) {
60 try {
61 // report a malformed pattern as a parse error rather than leaking PatternSyntaxException (JEXL-security f019)
62 this.literal = Pattern.compile(literal);
63 } catch (final PatternSyntaxException xpattern) {
64 throw new JexlException.Parsing(jexlInfo(),
65 "invalid regular expression at " + xpattern.getIndex() + ": " + xpattern.getDescription()).clean();
66 }
67 }
68
69 @Override
70 public String toString() {
71 return Objects.toString(literal, "");
72 }
73 }