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org.apache.commons.jexl.parser.ASTIfStatement |
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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.JexlContext; |
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20 | import org.apache.commons.jexl.util.Coercion; |
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21 | ||
22 | /** |
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23 | * if ( expression ) statement [else statement]. |
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24 | * |
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25 | * @author Dion Gillard |
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26 | * @since 1.1 |
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27 | */ |
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28 | public class ASTIfStatement extends SimpleNode { |
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29 | /** child index of the else statement to execute. */ |
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30 | private static final int ELSE_STATEMENT_INDEX = 2; |
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31 | /** |
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32 | * Create the node given an id. |
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33 | * |
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34 | * @param id node id. |
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35 | */ |
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36 | public ASTIfStatement(int id) { |
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37 | 0 | super(id); |
38 | 0 | } |
39 | ||
40 | /** |
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41 | * Create a node with the given parser and id. |
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42 | * |
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43 | * @param p a parser. |
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44 | * @param id node id. |
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45 | */ |
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46 | public ASTIfStatement(Parser p, int id) { |
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47 | 24 | super(p, id); |
48 | 24 | } |
49 | ||
50 | /** {@inheritDoc} */ |
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51 | public Object jjtAccept(ParserVisitor visitor, Object data) { |
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52 | 0 | return visitor.visit(this, data); |
53 | } |
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54 | ||
55 | /** {@inheritDoc} */ |
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56 | public Object value(JexlContext jc) throws Exception { |
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57 | 20 | Object result = null; |
58 | /* first child is the expression */ |
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59 | 20 | Object expression = ((SimpleNode) jjtGetChild(0)).value(jc); |
60 | 20 | if (Coercion.coerceBoolean(expression).booleanValue()) { |
61 | // true statement |
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62 | 16 | result = ((SimpleNode) jjtGetChild(1)).value(jc); |
63 | } else { |
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64 | // if there is a false, execute it |
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65 | 4 | if (jjtGetNumChildren() == ELSE_STATEMENT_INDEX + 1) { |
66 | 3 | result = ((SimpleNode) jjtGetChild(2)).value(jc); |
67 | } |
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68 | } |
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69 | ||
70 | 20 | return result; |
71 | } |
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72 | ||
73 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |