Classes in this File | Line Coverage | Branch Coverage | Complexity | |||||||
EngineServiceOuterProxy |
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| 1.0;1 |
1 | // Copyright 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.services.impl; |
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16 | ||
17 | import java.io.IOException; |
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18 | import java.io.Serializable; |
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19 | ||
20 | import org.apache.hivemind.util.Defense; |
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21 | import org.apache.tapestry.IRequestCycle; |
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22 | import org.apache.tapestry.engine.IEngineService; |
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23 | import org.apache.tapestry.engine.ILink; |
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24 | ||
25 | /** |
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26 | * Outer proxy for engine services. The inner proxy resolves the engine service name to a engine |
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27 | * service implementation and installed it into the outer proxy as a delegate. Although HiveMind |
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28 | * does provide a similar system of inner and outer delegates, Tapestry's engine-service: |
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29 | * {@link org.apache.tapestry.services.impl.EngineServiceObjectProvider} object provider can |
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30 | * cause exceptions (recurive service build) when attempting to link two services together. This |
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31 | * extra layer of proxying resolves that issue. |
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32 | * |
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33 | * @author Howard M. Lewis Ship |
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34 | * @since 4.0 |
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35 | */ |
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36 | public class EngineServiceOuterProxy implements IEngineService, Serializable |
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37 | { |
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38 | ||
39 | /** |
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40 | * generated. |
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41 | */ |
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42 | private static final long serialVersionUID = 2050789495671401625L; |
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43 | ||
44 | private final String _serviceName; |
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45 | ||
46 | private IEngineService _delegate; |
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47 | ||
48 | public EngineServiceOuterProxy(String serviceName) |
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49 | 14 | { |
50 | 14 | Defense.notNull(serviceName, "serviceName"); |
51 | ||
52 | 14 | _serviceName = serviceName; |
53 | 14 | } |
54 | ||
55 | void installDelegate(IEngineService delegate) |
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56 | { |
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57 | 18 | _delegate = delegate; |
58 | 18 | } |
59 | ||
60 | IEngineService getDelegate() |
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61 | { |
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62 | 4 | return _delegate; |
63 | } |
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64 | ||
65 | public ILink getLink(boolean post, Object parameter) |
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66 | { |
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67 | 4 | return _delegate.getLink(post, parameter); |
68 | } |
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69 | ||
70 | public void service(IRequestCycle cycle) throws IOException |
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71 | { |
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72 | 7 | _delegate.service(cycle); |
73 | 6 | } |
74 | ||
75 | public String getName() |
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76 | { |
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77 | 1 | return _serviceName; |
78 | } |
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79 | ||
80 | public String toString() |
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81 | { |
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82 | 1 | return ImplMessages.engineServiceOuterProxyToString(_serviceName); |
83 | } |
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84 | ||
85 | } |