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org.apache.commons.jexl.parser.ASTIdentifier |
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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 | ||
21 | /** |
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22 | * Simple identifier - $foo or $foo.bar (both parts are identifiers). |
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23 | * |
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24 | * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a> |
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25 | * @version $Id: ASTIdentifier.java 398199 2006-04-29 16:30:05Z dion $ |
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26 | */ |
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27 | public class ASTIdentifier extends SimpleNode { |
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28 | /** the name of the variable. */ |
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29 | protected String val; |
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30 | ||
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 ASTIdentifier(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 ASTIdentifier(Parser p, int id) { |
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47 | 437 | super(p, id); |
48 | 437 | } |
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 | 448 | return jc.getVars().get(val); |
58 | } |
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59 | ||
60 | /** |
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61 | * returns the value of itself applied to the object. We assume that an |
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62 | * identifier can be gotten via a get(String). |
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63 | * e.g. if we have bean.property, 'property' has been parsed as an identifier, |
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64 | * and we need to resolve the expression by calling the property getter. |
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65 | * |
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66 | * @param obj the object to evaluate against. |
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67 | * @param jc the {@link JexlContext}. |
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68 | * @throws Exception on any error. |
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69 | * @return the resulting value. |
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70 | * @see ASTArrayAccess#evaluateExpr(Object, Object) |
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71 | */ |
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72 | public Object execute(Object obj, JexlContext jc) throws Exception { |
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73 | 38 | return ASTArrayAccess.evaluateExpr(obj, val); |
74 | } |
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75 | ||
76 | /** |
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77 | * Gets the name of the variable. |
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78 | * @return the variable name. |
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79 | */ |
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80 | public String getIdentifierString() { |
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81 | 204 | return val; |
82 | } |
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83 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |