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org.apache.commons.jexl.parser.ASTEQNode |
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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 | package org.apache.commons.jexl.parser; |
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17 | ||
18 | import org.apache.commons.jexl.JexlContext; |
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19 | import org.apache.commons.jexl.util.Coercion; |
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20 | ||
21 | /** |
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22 | * Represents equality between values. |
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23 | * |
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24 | * If the values are of the same class, .equals() is used. |
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25 | * |
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26 | * If either value is a {@link Float} or {@link Double} (but both are not the same class), |
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27 | * the values are coerced to {@link Double}s before comparing. |
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28 | * |
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29 | * If either value is a {@link Number} or {@link Character} (but both are not the same class), |
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30 | * the values are coerced to {@link Long}s before comparing. |
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31 | * |
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32 | * If either value is a {@link Boolean} (but both are not the same class), |
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33 | * the values are coerced to {@link Boolean}s before comparing. |
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34 | * |
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35 | * If either value is a {@link String} (but both are not the same class), |
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36 | * toString() is called on both before comparing. |
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37 | * |
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38 | * Otherwise left.equals(right) is returned. |
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39 | * |
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40 | * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a> |
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41 | * @version $Id: ASTEQNode.java 398190 2006-04-29 16:04:10Z dion $ |
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42 | */ |
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43 | public class ASTEQNode extends SimpleNode { |
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44 | /** |
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45 | * Create the node given an id. |
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46 | * |
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47 | * @param id node id. |
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48 | */ |
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49 | public ASTEQNode(int id) { |
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50 | 0 | super(id); |
51 | 0 | } |
52 | ||
53 | /** |
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54 | * Create a node with the given parser and id. |
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55 | * |
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56 | * @param p a parser. |
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57 | * @param id node id. |
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58 | */ |
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59 | public ASTEQNode(Parser p, int id) { |
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60 | 55 | super(p, id); |
61 | 55 | } |
62 | ||
63 | /** {@inheritDoc} */ |
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64 | public Object jjtAccept(ParserVisitor visitor, Object data) { |
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65 | 0 | return visitor.visit(this, data); |
66 | } |
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67 | ||
68 | /** {@inheritDoc} */ |
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69 | public Object value(JexlContext pc) throws Exception { |
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70 | 53 | Object left = ((SimpleNode) jjtGetChild(0)).value(pc); |
71 | 53 | Object right = ((SimpleNode) jjtGetChild(1)).value(pc); |
72 | ||
73 | 53 | if (left == null && right == class="keyword">null) { |
74 | /* |
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75 | * if both are null L == R |
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76 | */ |
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77 | 1 | return Boolean.TRUE; |
78 | 52 | } else if (left == null || right == class="keyword">null) { |
79 | /* |
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80 | * we know both aren't null, therefore L != R |
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81 | */ |
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82 | 4 | return Boolean.FALSE; |
83 | 48 | } else if (left.getClass().equals(right.getClass())) { |
84 | 38 | return left.equals(right) ? Boolean.TRUE : Boolean.FALSE; |
85 | 10 | } else if (left instanceof Float || left instanceof Double |
86 | || right instanceof Float || right instanceof Double) { |
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87 | 4 | Double l = Coercion.coerceDouble(left); |
88 | 4 | Double r = Coercion.coerceDouble(right); |
89 | ||
90 | 4 | return l.equals(r) ? Boolean.TRUE : Boolean.FALSE; |
91 | 6 | } else if (left instanceof Number || right instanceof Number |
92 | || left instanceof Character || right instanceof Character) { |
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93 | 2 | return Coercion.coerceLong(left).equals(Coercion.coerceLong(right)) ? Boolean.TRUE |
94 | : Boolean.FALSE; |
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95 | 4 | } else if (left instanceof Boolean || right instanceof Boolean) { |
96 | 2 | return Coercion.coerceBoolean(left).equals( |
97 | Coercion.coerceBoolean(right)) ? Boolean.TRUE |
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98 | : Boolean.FALSE; |
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99 | 2 | } else if (left instanceof java.lang.String || right instanceof String) { |
100 | 1 | return left.toString().equals(right.toString()) ? Boolean.TRUE |
101 | : Boolean.FALSE; |
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102 | } |
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103 | ||
104 | 1 | return left.equals(right) ? Boolean.TRUE : Boolean.FALSE; |
105 | } |
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106 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |