Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
BinaryOperator |
|
| 1.0;1 |
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.el; | |
18 | ||
19 | import javax.servlet.jsp.el.ELException; | |
20 | ||
21 | /** | |
22 | * | |
23 | * <p>This is the superclass for all binary operators | |
24 | * | |
25 | * @author Nathan Abramson - Art Technology Group | |
26 | * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: bayard $ | |
27 | **/ | |
28 | ||
29 | public abstract class BinaryOperator | |
30 | { | |
31 | //------------------------------------- | |
32 | /** | |
33 | * | |
34 | * Constructor | |
35 | **/ | |
36 | public BinaryOperator () | |
37 | 2 | { |
38 | 2 | } |
39 | ||
40 | //------------------------------------- | |
41 | // Expression methods | |
42 | //------------------------------------- | |
43 | /** | |
44 | * | |
45 | * Returns the symbol representing the operator | |
46 | **/ | |
47 | public abstract String getOperatorSymbol (); | |
48 | ||
49 | //------------------------------------- | |
50 | /** | |
51 | * | |
52 | * Applies the operator to the given pair of values | |
53 | **/ | |
54 | public abstract Object apply (Object pLeft, | |
55 | Object pRight) | |
56 | throws ELException; | |
57 | ||
58 | //------------------------------------- | |
59 | /** | |
60 | * | |
61 | * Returns true if evaluation is necessary given the specified Left | |
62 | * value. The And/OrOperators make use of this | |
63 | **/ | |
64 | public boolean shouldEvaluate (Object pLeft) | |
65 | { | |
66 | 2 | return true; |
67 | } | |
68 | ||
69 | //------------------------------------- | |
70 | /** | |
71 | * | |
72 | * Returns true if the operator expects its arguments to be coerced | |
73 | * to Booleans. The And/Or operators set this to true. | |
74 | **/ | |
75 | public boolean shouldCoerceToBoolean () | |
76 | { | |
77 | 2 | return false; |
78 | } | |
79 | ||
80 | //------------------------------------- | |
81 | } |