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 * http://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.internal;
18
19 import org.apache.commons.jexl3.JexlFeatures;
20
21 import java.util.Objects;
22
23 /**
24 * Maintains the set of allowed features associated with a script/expression source.
25 * <p>This is meant for caching scripts using their 'source' as key but still distinguishing
26 * scripts with different features and prevent false sharing.
27 */
28 public final class Source {
29 /** The hash code, pre-computed for fast op. */
30 private final int hashCode;
31 /** The set of features. */
32 private final JexlFeatures features;
33 /** The actual source script/expression. */
34 private final String str;
35
36 /**
37 * Default constructor.
38 * @param theFeatures the features
39 * @param theStr the script source
40 */
41 Source(final JexlFeatures theFeatures, final String theStr) { // CSOFF: MagicNumber
42 this.features = theFeatures;
43 this.str = theStr;
44 int hash = 3;
45 hash = 37 * hash + features.hashCode();
46 hash = 37 * hash + str.hashCode() ;
47 this.hashCode = hash;
48 }
49
50 /**
51 * @return the length of the script source
52 */
53 int length() {
54 return str.length();
55 }
56
57 @Override
58 public int hashCode() {
59 return hashCode;
60 }
61
62 @Override
63 public boolean equals(final Object obj) {
64 if (this == obj) {
65 return true;
66 }
67 if (obj == null) {
68 return false;
69 }
70 if (getClass() != obj.getClass()) {
71 return false;
72 }
73 final Source other = (Source) obj;
74 if (!Objects.equals(this.features, other.features)) {
75 return false;
76 }
77 if (!Objects.equals(this.str, other.str)) {
78 return false;
79 }
80 return true;
81 }
82
83 @Override
84 public String toString() {
85 return str;
86 }
87
88 /**
89 * @return the features associated with the source
90 */
91 public JexlFeatures getFeatures() {
92 return features;
93 }
94
95 }