Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
TypeConverterWrapper |
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| 2.25;2.25 |
1 | // Copyright 2004, 2005 The Apache Software Foundation |
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2 | // |
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3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 | // you may not use this file except in compliance with the License. |
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5 | // You may obtain a copy of the License at |
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6 | // |
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7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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8 | // |
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9 | // Unless required by applicable law or agreed to in writing, software |
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10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 | // See the License for the specific language governing permissions and |
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13 | // limitations under the License. |
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14 | ||
15 | package org.apache.tapestry.coerce; |
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16 | ||
17 | import java.util.Iterator; |
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18 | import java.util.List; |
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19 | ||
20 | import org.apache.hivemind.lib.util.StrategyRegistry; |
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21 | import org.apache.hivemind.lib.util.StrategyRegistryImpl; |
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22 | ||
23 | /** |
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24 | * A service implementation that works around an |
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25 | * {@link org.apache.hivemind.lib.util.StrategyRegistry}. The registry is contructed from a |
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26 | * configuration that follows the <code>tapestry.coerce.Converters</code> schema (a List of |
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27 | * {@link org.apache.tapestry.coerce.TypeConverterContribution}plus an additional converter for |
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28 | * nulls. |
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29 | * |
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30 | * @author Howard M. Lewis Ship |
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31 | * @since 4.0 |
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32 | */ |
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33 | 4 | public final class TypeConverterWrapper implements TypeConverter |
34 | { |
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35 | 4 | private StrategyRegistry _registry = new StrategyRegistryImpl(); |
36 | ||
37 | private List _contributions; |
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38 | ||
39 | private TypeConverter _nullConverter; |
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40 | ||
41 | public void initializeService() |
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42 | { |
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43 | 2 | Iterator i = _contributions.iterator(); |
44 | ||
45 | 8 | while (i.hasNext()) |
46 | { |
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47 | 6 | TypeConverterContribution c = (TypeConverterContribution) i.next(); |
48 | ||
49 | 6 | _registry.register(c.getSubjectClass(), c.getConverter()); |
50 | 6 | } |
51 | 2 | } |
52 | ||
53 | public Object convertValue(Object value) |
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54 | { |
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55 | 6 | if (value == null) |
56 | { |
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57 | 2 | if (_nullConverter == null) |
58 | 1 | return null; |
59 | ||
60 | 1 | return _nullConverter.convertValue(null); |
61 | } |
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62 | ||
63 | 4 | TypeConverter delegate = (TypeConverter) _registry.getStrategy(value.getClass()); |
64 | ||
65 | 4 | return delegate.convertValue(value); |
66 | } |
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67 | ||
68 | /** |
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69 | * Sets the List of {@link org.apache.tapestry.coerce.TypeConverterContribution}s. |
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70 | */ |
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71 | ||
72 | public void setContributions(List contributions) |
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73 | { |
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74 | 2 | _contributions = contributions; |
75 | 2 | } |
76 | ||
77 | /** |
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78 | * Sets the converter used to convert null. |
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79 | */ |
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80 | ||
81 | public void setNullConverter(TypeConverter nullConverter) |
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82 | { |
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83 | 2 | _nullConverter = nullConverter; |
84 | 2 | } |
85 | } |