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| org.apache.commons.jexl.JexlHelper | 
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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 | ||
| 17 |  package org.apache.commons.jexl; | |
| 18 | ||
| 19 |  import org.apache.commons.jexl.context.HashMapContext; | |
| 20 | ||
| 21 |  /** | |
| 22 |   *  Helper to create a context.  In the current implementation of JEXL, there | |
| 23 |   *  is one implementation of JexlContext - {@link HashMapContext}, and there | |
| 24 |   *  is no reason not to directly instantiate {@link HashMapContext} in your | |
| 25 |   *  own application. | |
| 26 |   * | |
| 27 |   *  @since 1.0 | |
| 28 |   *  @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a> | |
| 29 |   *  @version $Id: JexlHelper.java 397092 2006-04-26 05:11:28Z dion $ | |
| 30 |   */ | |
| 31 | 9 | public class JexlHelper { | 
| 32 |      /** singleton instance. */ | |
| 33 | 9 | protected static JexlHelper helper = new JexlHelper(); | 
| 34 | ||
| 35 |      /** @return the single instance. */ | |
| 36 | protected static JexlHelper getInstance() { | |
| 37 | 98 |          return helper; | 
| 38 | } | |
| 39 | ||
| 40 |      /** | |
| 41 |       * Returns a new {@link JexlContext}. | |
| 42 |       * @return a new JexlContext | |
| 43 |       */ | |
| 44 | public static JexlContext createContext() { | |
| 45 | 98 |          return getInstance().newContext(); | 
| 46 | } | |
| 47 | ||
| 48 |      /** | |
| 49 |       * Creates and returns a new {@link JexlContext}.   | |
| 50 |       * The current implementation creates a new instance of  | |
| 51 |       * {@link HashMapContext}. | |
| 52 |       * @return a new JexlContext | |
| 53 |       */ | |
| 54 |      protected JexlContext newContext() { | |
| 55 | 98 | return new HashMapContext(); | 
| 56 | } | |
| 57 | } | 
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