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| org.apache.commons.jexl.parser.ASTNotNode | 
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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.parser; | |
| 17 | ||
| 18 |  import org.apache.commons.jexl.JexlContext; | |
| 19 |  import org.apache.commons.jexl.util.Coercion; | |
| 20 | ||
| 21 |  /** | |
| 22 |   * Not : 'not' or '!'. | |
| 23 |   *  | |
| 24 |   * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a> | |
| 25 |   * @version $Id: ASTNotNode.java 398270 2006-04-30 03:02:58Z dion $ | |
| 26 |   */ | |
| 27 | ||
| 28 | public class ASTNotNode extends SimpleNode { | |
| 29 |      /** | |
| 30 |       * Create the node given an id. | |
| 31 |       *  | |
| 32 |       * @param id node id. | |
| 33 |       */ | |
| 34 | public ASTNotNode(int id) { | |
| 35 | 0 |          super(id); | 
| 36 | 0 |      } | 
| 37 | ||
| 38 |      /** | |
| 39 |       * Create a node with the given parser and id. | |
| 40 |       *  | |
| 41 |       * @param p a parser. | |
| 42 |       * @param id node id. | |
| 43 |       */ | |
| 44 | public ASTNotNode(Parser p, int id) { | |
| 45 | 13 |          super(p, id); | 
| 46 | 13 | } | 
| 47 | ||
| 48 |      /** {@inheritDoc} */ | |
| 49 |      public Object jjtAccept(ParserVisitor visitor, Object data) { | |
| 50 | 0 |          return visitor.visit(this, data); | 
| 51 | } | |
| 52 | ||
| 53 |      /** {@inheritDoc} */ | |
| 54 |      public Object value(JexlContext jc) throws Exception { | |
| 55 | 13 | Object val = ((SimpleNode) jjtGetChild(0)).value(jc); | 
| 56 | ||
| 57 |          /* | |
| 58 |           * coercion rules | |
| 59 |           */ | |
| 60 | ||
| 61 | 13 | Boolean b = Coercion.coerceBoolean(val); | 
| 62 | ||
| 63 | 13 | if (b != null) { | 
| 64 | 13 |              return b.booleanValue() ? Boolean.FALSE : Boolean.TRUE; | 
| 65 | } | |
| 66 | ||
| 67 | 0 |          throw new Exception("expression not boolean valued"); | 
| 68 | } | |
| 69 | ||
| 70 | } | 
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