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| org.apache.commons.jexl.resolver.FlatResolver | 
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| 1 |  /* | |
| 2 |   * Copyright 2002-2006 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 |  package org.apache.commons.jexl.resolver; | |
| 17 | ||
| 18 |  import org.apache.commons.jexl.JexlExprResolver; | |
| 19 |  import org.apache.commons.jexl.JexlContext; | |
| 20 | ||
| 21 |  /** | |
| 22 |   *  Simple resolver to try the expression as-is from the context. | |
| 23 |   * | |
| 24 |   *  For example, you could resolve ant-ish properties (foo.bar.woogie) | |
| 25 |   *  using this... | |
| 26 |   * | |
| 27 |   *  hint, hint... | |
| 28 |   * | |
| 29 |   *  @since 1.0 | |
| 30 |   *  @author <a href="mailto:geirm@adeptra.com">Geir Magnusson Jr.</a> | |
| 31 |   *  @version $Id: FlatResolver.java 397542 2006-04-27 13:43:47Z dion $ | |
| 32 |   */ | |
| 33 | public class FlatResolver implements JexlExprResolver { | |
| 34 |      /** | |
| 35 |       *  Flag to return NO_VALUE on null from context. | |
| 36 |       *  this allows jexl to try to evaluate | |
| 37 |       */ | |
| 38 | 4 | protected boolean noValOnNull = true; | 
| 39 | ||
| 40 |      /** | |
| 41 |       * Default CTOR. | |
| 42 |       */ | |
| 43 | 3 |      public FlatResolver() { | 
| 44 | 3 | } | 
| 45 | ||
| 46 |      /** | |
| 47 |       *  CTOR that lets you override the default behavior of | |
| 48 |       *  noValOnNull, which is true. (jexl gets a shot after if null) | |
| 49 |       * | |
| 50 |       *  @param valOnNull Whether NO_VALUE will be returned instead of null. | |
| 51 |       */ | |
| 52 | 1 | public FlatResolver(boolean valOnNull) { | 
| 53 | 1 | noValOnNull = valOnNull; | 
| 54 | 1 | } | 
| 55 | ||
| 56 |      /** | |
| 57 |       *  Try to resolve expression as-is. | |
| 58 |       * | |
| 59 |       *  @param context The context for resolution. | |
| 60 |       *  @param expression The flat expression. | |
| 61 |       *  @return The resolved value. | |
| 62 |       */ | |
| 63 |      public Object evaluate(JexlContext context, String expression) { | |
| 64 | 3 | Object val = context.getVars().get(expression); | 
| 65 | ||
| 66 | 3 | if (val == null && noValOnNull) { | 
| 67 | 1 |              return JexlExprResolver.NO_VALUE; | 
| 68 | } | |
| 69 | ||
| 70 | 2 |          return val; | 
| 71 | } | |
| 72 | } | 
| This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |