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