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.tika.mime;
18
19 /**
20 * Defines a Boolean Binary Operator.
21 *
22 *
23 */
24 interface Operator {
25
26 /** The OR Boolean operator */
27 final static Operator OR = new Or();
28
29 /** The AND Boolean operator */
30 final static Operator AND = new And();
31
32 /**
33 * Evaluates the specified bolean operands.
34 *
35 * @param o1
36 * is the first boolean operand.
37 * @param o2
38 * is the second boolean operand.
39 * @return the value of this boolean operator applied on the specified
40 * boolean operands.
41 */
42 boolean eval(boolean o1, boolean o2);
43
44 /**
45 * Defines the Boolean Binary Operator AND.
46 */
47 final static class And implements Operator {
48 public boolean eval(boolean o1, boolean o2) {
49 return o1 && o2;
50 }
51
52 public String toString() {
53 return "AND";
54 }
55 }
56
57 /**
58 * Defines the Boolean Binary Operator OR.
59 */
60 final static class Or implements Operator {
61 public boolean eval(boolean o1, boolean o2) {
62 return o1 || o2;
63 }
64
65 public String toString() {
66 return "OR";
67 }
68 }
69 }