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org.apache.commons.jexl.parser.ASTMulNode |
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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.JexlContext; |
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20 | import org.apache.commons.jexl.util.Coercion; |
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21 | ||
22 | /** |
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23 | * Multiplication |
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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: ASTMulNode.java,v 1.4 2004/02/28 13:45:20 yoavs Exp $ |
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27 | */ |
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28 | public class ASTMulNode extends SimpleNode |
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29 | { |
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30 | public ASTMulNode(int id) |
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31 | { |
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32 | 0 | super(id); |
33 | 0 | } |
34 | ||
35 | public ASTMulNode(Parser p, int id) |
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36 | { |
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37 | 75 | super(p, id); |
38 | 75 | } |
39 | ||
40 | ||
41 | /** Accept the visitor. **/ |
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42 | public Object jjtAccept(ParserVisitor visitor, Object data) |
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43 | { |
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44 | 0 | return visitor.visit(this, data); |
45 | } |
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46 | ||
47 | public Object value(JexlContext context) |
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48 | throws Exception |
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49 | { |
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50 | 75 | Object left = ((SimpleNode) jjtGetChild(0)).value(context); |
51 | 75 | Object right = ((SimpleNode) jjtGetChild(1)).value(context); |
52 | ||
53 | /* |
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54 | * the spec says 'and', I think 'or' |
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55 | */ |
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56 | 75 | if (left == null && right == class="keyword">null) |
57 | 0 | return new Integer(0); |
58 | ||
59 | /* |
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60 | * if anything is float, double or string with ( "." | "E" | "e") |
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61 | * coerce all to doubles and do it |
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62 | */ |
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63 | 75 | if ( left instanceof Float || left instanceof Double |
64 | 5 | || right instanceof Float || right instanceof Double |
65 | 4 | || ( left instanceof String |
66 | && ( ((String) left).indexOf(".") != -1 || |
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67 | ((String) left).indexOf("e") != -1 || |
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68 | ((String) left).indexOf("E") != -1 ) |
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69 | ) |
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70 | 4 | || ( right instanceof String |
71 | 1 | && ( ((String) right).indexOf(".") != -1 || |
72 | ((String) right).indexOf("e") != -1 || |
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73 | ((String) right).indexOf("E") != -1 ) |
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74 | ) |
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75 | ) |
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76 | { |
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77 | 30 | Double l = Coercion.coerceDouble(left); |
78 | 30 | Double r = Coercion.coerceDouble(right); |
79 | ||
80 | 30 | return new Double( l.doubleValue() * r.doubleValue() ); |
81 | } |
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82 | ||
83 | /* |
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84 | * otherwise to longs with thee! |
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85 | */ |
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86 | ||
87 | 45 | Long l = Coercion.coerceLong(left); |
88 | 45 | Long r = Coercion.coerceLong(right); |
89 | ||
90 | 45 | return new Long(l.longValue() * r.longValue()); |
91 | } |
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92 | ||
93 | } |
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94 |
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