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org.apache.commons.jexl.parser.ASTSubtractNode |
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1 | /* |
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2 | * Copyright 2002,2004 The Apache Software Foundation. |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | ||
17 | package org.apache.commons.jexl.parser; |
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18 | ||
19 | import org.apache.commons.jexl.util.Coercion; |
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20 | import org.apache.commons.jexl.JexlContext; |
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21 | ||
22 | /** |
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23 | * Subtraction |
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24 | * |
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25 | * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a> |
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26 | * @author <a href="mailto:mhw@kremvax.net">Mark H. Wilkinson</a> |
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27 | * @version $Id: ASTSubtractNode.java,v 1.5 2004/02/28 13:45:20 yoavs Exp $ |
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28 | */ |
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29 | public class ASTSubtractNode extends SimpleNode |
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30 | { |
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31 | public ASTSubtractNode(int id) |
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32 | { |
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33 | 0 | super(id); |
34 | 0 | } |
35 | ||
36 | public ASTSubtractNode(Parser p, int id) |
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37 | { |
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38 | 105 | super(p, id); |
39 | 105 | } |
40 | ||
41 | public Object value(JexlContext context) |
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42 | throws Exception |
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43 | { |
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44 | 105 | Object left = ((SimpleNode) jjtGetChild(0)).value(context); |
45 | 105 | Object right = ((SimpleNode) jjtGetChild(1)).value(context); |
46 | ||
47 | /* |
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48 | * the spec says 'and', I think 'or' |
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49 | */ |
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50 | 105 | if (left == null && right == class="keyword">null) |
51 | 0 | return new Integer(0); |
52 | ||
53 | /* |
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54 | * if anything is float, double or string with ( "." | "E" | "e") |
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55 | * coerce all to doubles and do it |
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56 | */ |
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57 | 105 | if ( left instanceof Float || left instanceof Double |
58 | 7 | || right instanceof Float || right instanceof Double |
59 | 7 | || ( left instanceof String |
60 | && ( ((String) left).indexOf(".") != -1 || |
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61 | ((String) left).indexOf("e") != -1 || |
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62 | ((String) left).indexOf("E") != -1 ) |
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63 | ) |
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64 | 7 | || ( right instanceof String |
65 | && ( ((String) right).indexOf(".") != -1 || |
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66 | ((String) right).indexOf("e") != -1 || |
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67 | ((String) right).indexOf("E") != -1 ) |
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68 | ) |
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69 | ) |
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70 | { |
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71 | 0 | Double l = Coercion.coerceDouble(left); |
72 | 0 | Double r = Coercion.coerceDouble(right); |
73 | ||
74 | 0 | return new Double(l.doubleValue() - r.doubleValue()); |
75 | } |
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76 | ||
77 | /* |
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78 | * otherwise to longs with thee! |
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79 | */ |
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80 | ||
81 | 105 | Long l = Coercion.coerceLong(left); |
82 | 105 | Long r = Coercion.coerceLong(right); |
83 | ||
84 | /* |
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85 | * TODO - this is actually wrong - JSTL says to return a Long |
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86 | * but we have problems where you have something like |
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87 | * |
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88 | * foo.bar( a - b ) |
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89 | * |
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90 | * where bar wants an int... |
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91 | * |
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92 | */ |
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93 | 105 | long v = l.class="keyword">longValue() - r.class="keyword">longValue(); |
94 | ||
95 | 105 | if ( left instanceof Integer && right instanceof Integer ) |
96 | { |
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97 | 90 | return new Integer((int) v); |
98 | } |
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99 | else |
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100 | { |
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101 | 15 | return new Long(v); |
102 | } |
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103 | } |
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104 | /** Accept the visitor. **/ |
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105 | public Object jjtAccept(ParserVisitor visitor, Object data) |
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106 | { |
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107 | 0 | return visitor.visit(this, data); |
108 | } |
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109 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |