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org.apache.commons.jexl.parser.ASTSubtractNode |
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1 | /* |
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2 | * Copyright 2002-2006 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.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 398325 2006-04-30 12:34:29Z dion $ |
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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 | * Create the node given an id. |
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32 | * |
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33 | * @param id node id. |
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34 | */ |
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35 | public ASTSubtractNode(int id) { |
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36 | 0 | super(id); |
37 | 0 | } |
38 | ||
39 | /** |
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40 | * Create a node with the given parser and id. |
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41 | * |
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42 | * @param p a parser. |
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43 | * @param id node id. |
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44 | */ |
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45 | public ASTSubtractNode(Parser p, int id) { |
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46 | 7 | super(p, id); |
47 | 7 | } |
48 | ||
49 | /** {@inheritDoc} */ |
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50 | public Object value(JexlContext context) throws Exception { |
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51 | 7 | Object left = ((SimpleNode) jjtGetChild(0)).value(context); |
52 | 7 | Object right = ((SimpleNode) jjtGetChild(1)).value(context); |
53 | ||
54 | /* |
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55 | * the spec says 'and', I think 'or' |
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56 | */ |
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57 | 7 | if (left == null && right == class="keyword">null) { |
58 | 0 | return new Byte((byte) 0); |
59 | } |
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60 | ||
61 | /* |
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62 | * if anything is float, double or string with ( "." | "E" | "e") coerce |
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63 | * all to doubles and do it |
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64 | */ |
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65 | 7 | if (left instanceof Float |
66 | || left instanceof Double |
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67 | || right instanceof Float |
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68 | || right instanceof Double |
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69 | || (left instanceof String |
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70 | && (((String) left).indexOf(".") != -1 |
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71 | || ((String) left).indexOf("e") != -1 |
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72 | || ((String) left).indexOf("E") != -1)) |
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73 | || (right instanceof String |
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74 | && (((String) right).indexOf(".") != -1 |
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75 | || ((String) right).indexOf("e") != -1 |
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76 | || ((String) right).indexOf("E") != -1))) { |
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77 | 0 | Double l = Coercion.coerceDouble(left); |
78 | 0 | Double r = Coercion.coerceDouble(right); |
79 | ||
80 | 0 | 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 | 7 | Long l = Coercion.coerceLong(left); |
88 | 7 | Long r = Coercion.coerceLong(right); |
89 | ||
90 | 7 | return new Long(l.longValue() - r.longValue()); |
91 | ||
92 | } |
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93 | ||
94 | /** {@inheritDoc} */ |
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95 | public Object jjtAccept(ParserVisitor visitor, Object data) { |
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96 | 0 | return visitor.visit(this, data); |
97 | } |
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98 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |