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| org.apache.commons.jexl.util.BooleanPropertyExecutor | 
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| 1 |  /* | |
| 2 |   * Copyright 2000-2001,2004 The Apache Software Foundation. | |
| 3 |   * | |
| 4 |   * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 |   * you may not use this file except in compliance with the License. | |
| 6 |   * You may obtain a copy of the License at | |
| 7 |   * | |
| 8 |   *      http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 |   * | |
| 10 |   * Unless required by applicable law or agreed to in writing, software | |
| 11 |   * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 |   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 |   * See the License for the specific language governing permissions and | |
| 14 |   * limitations under the License. | |
| 15 |   */ | |
| 16 | ||
| 17 |  package org.apache.commons.jexl.util; | |
| 18 | ||
| 19 |  import org.apache.commons.logging.Log; | |
| 20 |  /** | |
| 21 |   *  Handles discovery and valuation of a | |
| 22 |   *  boolean object property, of the | |
| 23 |   *  form public boolean is<Property> when executed. | |
| 24 |   * | |
| 25 |   *  We do this separately as to preserve the current | |
| 26 |   *  quasi-broken semantics of get <as is property> | |
| 27 |   *  get<flip 1st char> get("property") and now followed | |
| 28 |   *  by is<Property>. | |
| 29 |   * | |
| 30 |   *  @since 1.0 | |
| 31 |   *  @author <a href="geirm@apache.org">Geir Magnusson Jr.</a> | |
| 32 |   *  @version $Id: BooleanPropertyExecutor.java 398171 2006-04-29 14:57:29Z dion $ | |
| 33 |   */ | |
| 34 | public class BooleanPropertyExecutor extends PropertyExecutor { | |
| 35 | ||
| 36 |      /** | |
| 37 |       * Constructor. | |
| 38 |       * | |
| 39 |       * @param rlog The instance log. | |
| 40 |       * @param is The JEXL introspector. | |
| 41 |       * @param clazz The class being analyzed. | |
| 42 |       * @param property The boolean property. | |
| 43 |       */ | |
| 44 |      public BooleanPropertyExecutor(Log rlog, | |
| 45 | org.apache.commons.jexl.util.introspection.Introspector is, | |
| 46 |          Class clazz, String property) { | |
| 47 | 3 |              super(rlog, is, clazz, property); | 
| 48 | 3 | } | 
| 49 | ||
| 50 |      /** | |
| 51 |       * Locate the getter method for this boolean property. | |
| 52 |       * | |
| 53 |       * @param clazz The class being analyzed. | |
| 54 |       * @param property Name of boolean property. | |
| 55 |       */ | |
| 56 | protected void discover(Class clazz, String property) { | |
| 57 |          try { | |
| 58 |              char c; | |
| 59 | StringBuffer sb; | |
| 60 | ||
| 61 | 3 |              Object[] params = {}; | 
| 62 | ||
| 63 |              /* | |
| 64 |               *  now look for a boolean isFoo | |
| 65 |               */ | |
| 66 | ||
| 67 | 3 | sb = new StringBuffer("is"); | 
| 68 | 3 | sb.append(property); | 
| 69 | ||
| 70 | 3 | c = sb.charAt(2); | 
| 71 | ||
| 72 | 3 |              if (Character.isLowerCase(c)) { | 
| 73 | 3 | sb.setCharAt(2, Character.toUpperCase(c)); | 
| 74 | } | |
| 75 | ||
| 76 | 3 | methodUsed = sb.toString(); | 
| 77 | 3 | method = introspector.getMethod(clazz, methodUsed, params); | 
| 78 | ||
| 79 | 3 | if (method != null) { | 
| 80 |                  /* | |
| 81 |                   *  now, this has to return a boolean | |
| 82 |                   */ | |
| 83 | ||
| 84 | 2 |                  if (method.getReturnType() == Boolean.TYPE) { | 
| 85 | 2 |                      return; | 
| 86 | } | |
| 87 | ||
| 88 | 0 |                  method = null; | 
| 89 | } | |
| 90 | 1 |          } catch (Exception e) { | 
| 91 | 0 |              rlog.error("PROGRAMMER ERROR : BooleanPropertyExector() : " + e); | 
| 92 | } | |
| 93 | 1 | } | 
| 94 | } | 
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