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org.apache.commons.configuration.web.ServletFilterConfiguration |
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1 | /* |
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2 | * Copyright 2004 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.configuration.web; |
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18 | ||
19 | import java.util.Iterator; |
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20 | import java.util.List; |
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21 | import javax.servlet.FilterConfig; |
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22 | ||
23 | import org.apache.commons.collections.iterators.EnumerationIterator; |
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24 | import org.apache.commons.configuration.AbstractConfiguration; |
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25 | import org.apache.commons.configuration.PropertyConverter; |
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26 | ||
27 | /** |
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28 | * A configuration wrapper around a {@link FilterConfig}. This configuration is |
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29 | * read only, adding or removing a property will throw an |
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30 | * UnsupportedOperationException. |
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31 | * |
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32 | * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a> |
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33 | * @version $Revision: 155408 $, $Date: 2005-02-26 13:56:39 +0100 (Sa, 26 Feb 2005) $ |
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34 | * @since 1.1 |
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35 | */ |
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36 | public class ServletFilterConfiguration extends AbstractConfiguration |
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37 | { |
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38 | protected FilterConfig config; |
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39 | ||
40 | /** |
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41 | * Create a ServletFilterConfiguration using the filter initialization parameters. |
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42 | 72 | */ |
43 | 72 | public ServletFilterConfiguration(FilterConfig config) |
44 | 184 | { |
45 | 112 | this.config = config; |
46 | 112 | } |
47 | ||
48 | 45 | public Object getProperty(String key) |
49 | { |
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50 | 98 | Object value = config.getInitParameter(key); |
51 | 98 | List list = PropertyConverter.split((String) value, getDelimiter()); |
52 | ||
53 | 98 | return list.size() > 1 ? list : value; |
54 | } |
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55 | ||
56 | /** |
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57 | * <p><strong>This operation is not supported and will throw an |
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58 | * UnsupportedOperationException.</strong></p> |
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59 | 9 | * |
60 | * @throws UnsupportedOperationException |
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61 | */ |
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62 | protected void addPropertyDirect(String key, Object obj) |
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63 | { |
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64 | 32 | throw new UnsupportedOperationException("Read only configuration"); |
65 | } |
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66 | ||
67 | public boolean isEmpty() |
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68 | { |
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69 | 46 | return !getKeys().hasNext(); |
70 | } |
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71 | ||
72 | public boolean containsKey(String key) |
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73 | { |
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74 | 28 | return getProperty(key) != null; |
75 | } |
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76 | ||
77 | /** |
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78 | * <p><strong>This operation is not supported and will throw an |
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79 | * UnsupportedOperationException.</strong></p> |
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80 | 9 | * |
81 | * @throws UnsupportedOperationException |
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82 | */ |
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83 | public void clearProperty(String key) |
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84 | { |
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85 | 50 | throw new UnsupportedOperationException("Read only configuration"); |
86 | } |
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87 | ||
88 | public Iterator getKeys() |
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89 | { |
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90 | 42 | return new EnumerationIterator(config.getInitParameterNames()); |
91 | } |
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92 | } |
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