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org.apache.commons.jexl.parser.ASTEmptyFunction |
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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 | ||
21 | import java.util.Collection; |
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22 | import java.util.Map; |
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23 | ||
24 | /** |
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25 | * function to see if reference doesn't exist in context |
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26 | * |
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27 | * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a> |
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28 | * @author <a href="mailto:tobrien@apache.org">Tim O'Brien</a> |
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29 | * @version $Id: ASTEmptyFunction.java,v 1.6 2004/08/23 13:30:36 dion Exp $ |
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30 | */ |
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31 | public class ASTEmptyFunction extends SimpleNode |
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32 | { |
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33 | public ASTEmptyFunction(int id) |
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34 | { |
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35 | 0 | super(id); |
36 | 0 | } |
37 | ||
38 | public ASTEmptyFunction(Parser p, int id) |
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39 | { |
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40 | 321 | super(p, id); |
41 | 321 | } |
42 | ||
43 | /** Accept the visitor. **/ |
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44 | public Object jjtAccept(ParserVisitor visitor, Object data) |
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45 | { |
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46 | 0 | return visitor.visit(this, data); |
47 | } |
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48 | ||
49 | public Object value(JexlContext jc) |
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50 | throws Exception |
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51 | { |
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52 | 306 | SimpleNode sn = (SimpleNode) jjtGetChild(0); |
53 | ||
54 | /* |
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55 | * I can't believe this |
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56 | */ |
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57 | ||
58 | 306 | Object o = sn.value(jc); |
59 | ||
60 | 306 | if (o == null) |
61 | 54 | return Boolean.TRUE; |
62 | ||
63 | 252 | if (o instanceof String && "".equals((String) o)) |
64 | 126 | return Boolean.TRUE; |
65 | ||
66 | 126 | if (o.getClass().isArray() && ((Object[])o).length == 0) |
67 | 15 | return Boolean.TRUE; |
68 | ||
69 | 111 | if (o instanceof Collection && ((Collection)o).isEmpty()) |
70 | 45 | return Boolean.TRUE; |
71 | ||
72 | /* |
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73 | * Map isn't a collection |
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74 | */ |
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75 | 66 | if (o instanceof Map && ((Map)o).isEmpty()) |
76 | 15 | return Boolean.TRUE; |
77 | ||
78 | 51 | return Boolean.FALSE; |
79 | } |
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80 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |