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org.apache.commons.jexl.parser.ASTModNode |
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1 | /* |
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2 | * Copyright 2003-2006 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.JexlContext; |
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20 | import org.apache.commons.jexl.util.Coercion; |
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21 | ||
22 | /** |
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23 | * % (mod). |
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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 | * @version $Id: ASTModNode.java 398206 2006-04-29 16:51:38Z dion $ |
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27 | */ |
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28 | public class ASTModNode extends SimpleNode { |
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29 | /** |
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30 | * Create the node given an id. |
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31 | * |
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32 | * @param id node id. |
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33 | */ |
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34 | public ASTModNode(int id) { |
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35 | 0 | super(id); |
36 | 0 | } |
37 | ||
38 | /** |
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39 | * Create a node with the given parser and id. |
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40 | * |
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41 | * @param p a parser. |
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42 | * @param id node id. |
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43 | */ |
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44 | public ASTModNode(Parser p, int id) { |
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45 | 2 | super(p, id); |
46 | 2 | } |
47 | ||
48 | /** {@inheritDoc} */ |
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49 | public Object jjtAccept(ParserVisitor visitor, Object data) { |
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50 | 0 | return visitor.visit(this, data); |
51 | } |
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52 | ||
53 | /** {@inheritDoc} */ |
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54 | public Object value(JexlContext jc) throws Exception { |
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55 | 2 | Object left = ((SimpleNode) jjtGetChild(0)).value(jc); |
56 | 2 | Object right = ((SimpleNode) jjtGetChild(1)).value(jc); |
57 | ||
58 | /* |
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59 | * the spec says 'and', I think 'or' |
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60 | */ |
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61 | 2 | if (left == null && right == class="keyword">null) { |
62 | 0 | return new Byte((byte) 0); |
63 | } |
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64 | ||
65 | /* |
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66 | * if anything is float, double or string with ( "." | "E" | "e") coerce |
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67 | * all to doubles and do it |
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68 | */ |
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69 | 2 | if (left instanceof Float |
70 | || left instanceof Double |
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71 | || right instanceof Float |
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72 | || right instanceof Double |
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73 | || (left instanceof String |
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74 | && (((String) left).indexOf(".") != -1 |
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75 | || ((String) left).indexOf("e") != -1 |
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76 | || ((String) left).indexOf("E") != -1)) |
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77 | || (right instanceof String |
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78 | && (((String) right).indexOf(".") != -1 |
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79 | || ((String) right).indexOf("e") != -1 |
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80 | || ((String) right).indexOf("E") != -1))) { |
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81 | 1 | Double l = Coercion.coerceDouble(left); |
82 | 1 | Double r = Coercion.coerceDouble(right); |
83 | ||
84 | /* |
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85 | * catch div/0 |
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86 | */ |
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87 | 1 | if (r.doubleValue() == 0.0) { |
88 | 0 | return new Double(0.0); |
89 | } |
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90 | ||
91 | 1 | return new Double(l.doubleValue() % r.doubleValue()); |
92 | } |
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93 | ||
94 | /* |
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95 | * otherwise to longs with thee! |
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96 | */ |
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97 | ||
98 | 1 | Long l = Coercion.coerceLong(left); |
99 | 1 | Long r = Coercion.coerceLong(right); |
100 | ||
101 | /* |
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102 | * catch the div/0 |
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103 | */ |
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104 | 1 | if (r.longValue() == 0) { |
105 | 0 | return new Long(0); |
106 | } |
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107 | ||
108 | 1 | return new Long(l.longValue() % r.longValue()); |
109 | } |
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110 | ||
111 | } |
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