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Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
DispatchingObjectStore.java | 100% | 87.5% | 100% | 90.9% |
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1 | /* | |
2 | * Copyright (c) 1998, 2005 Gargoyle Software Inc. All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions are met: | |
6 | * | |
7 | * 1. Redistributions of source code must retain the above copyright notice, | |
8 | * this list of conditions and the following disclaimer. | |
9 | * 2. Redistributions in binary form must reproduce the above copyright notice, | |
10 | * this list of conditions and the following disclaimer in the documentation | |
11 | * and/or other materials provided with the distribution. | |
12 | * 3. The end-user documentation included with the redistribution, if any, must | |
13 | * include the following acknowledgment: | |
14 | * | |
15 | * "This product includes software developed by Gargoyle Software Inc. | |
16 | * (http://www.GargoyleSoftware.com/)." | |
17 | * | |
18 | * Alternately, this acknowledgment may appear in the software itself, if | |
19 | * and wherever such third-party acknowledgments normally appear. | |
20 | * 4. The name "Gargoyle Software" must not be used to endorse or promote | |
21 | * products derived from this software without prior written permission. | |
22 | * For written permission, please contact info@GargoyleSoftware.com. | |
23 | * 5. Products derived from this software may not be called "GSBase", nor may | |
24 | * "GSBase" appear in their name, without prior written permission of | |
25 | * Gargoyle Software Inc. | |
26 | * | |
27 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, | |
28 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
29 | * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GARGOYLE | |
30 | * SOFTWARE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
31 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
32 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, | |
33 | * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
34 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
35 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, | |
36 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
37 | */ | |
38 | package com.gargoylesoftware.base.objectstore; | |
39 | ||
40 | import java.util.Collections; | |
41 | import java.util.Map; | |
42 | ||
43 | /** | |
44 | * An object store that just dispatches commands to other object stores | |
45 | * | |
46 | * @version $Revision: 1.6 $ | |
47 | * @author <a href="mailto:mbowler@GargoyleSoftware.com">Mike Bowler</a> | |
48 | */ | |
49 | public class DispatchingObjectStore extends ObjectStore { | |
50 | ||
51 | private final Map dispatchMap_; | |
52 | private final Map resourceFactoryMap_; | |
53 | ||
54 | ||
55 | /** | |
56 | * Create an instance. If you use this constructor then you must | |
57 | * override findStoreClass() since the dispatchMap has not been populated | |
58 | * | |
59 | * @param nameToResourceFactoryMap keys are names, values are the | |
60 | * resource factory objects that are represented by the name. This map | |
61 | * will be passed into any newly created ObjectStore's via the method | |
62 | * setResourceFactoryMap() | |
63 | */ | |
64 | 1 | protected DispatchingObjectStore(final Map nameToResourceFactoryMap) { |
65 | 1 | dispatchMap_ = Collections.EMPTY_MAP; |
66 | 1 | resourceFactoryMap_ = nameToResourceFactoryMap; |
67 | } | |
68 | ||
69 | /** | |
70 | * Create an instance | |
71 | * @param commandToStoreMap A map containing command to store mappings. Keys | |
72 | * and values must be class objects. | |
73 | * @param nameToResourceFactoryMap keys are names, values are the | |
74 | * resource factory objects that are represented by the name. This map | |
75 | * will be passed into any newly created ObjectStore's via the method | |
76 | * setResourceFactoryMap() | |
77 | */ | |
78 | 3 | public DispatchingObjectStore( final Map commandToStoreMap, |
79 | final Map nameToResourceFactoryMap ) { | |
80 | 3 | assertNotNull("commandToStoreMap", commandToStoreMap); |
81 | 2 | assertNotNull("nameToResourceFactoryMap", nameToResourceFactoryMap); |
82 | ||
83 | 2 | dispatchMap_ = commandToStoreMap; |
84 | 2 | resourceFactoryMap_ = nameToResourceFactoryMap; |
85 | } | |
86 | ||
87 | ||
88 | /** | |
89 | * Perform the dispatching. | |
90 | * | |
91 | * @param command The command to dispatch | |
92 | * @return The result of the command after the other store has processed it | |
93 | */ | |
94 | 3 | protected Object executeImpl( |
95 | final ObjectStoreCommand command ) { | |
96 | ||
97 | 3 | return findStore(command).execute(command); |
98 | } | |
99 | ||
100 | ||
101 | /** | |
102 | * Find the ObjectStore for the specified command | |
103 | * | |
104 | * @param command The command for which we are finding the store | |
105 | * @return The object store | |
106 | * @throws ObjectStoreCommandNotSupportedException If we cannot find a | |
107 | * store for the specified command | |
108 | * @throws ObjectStoreException if an error occurs when finding or | |
109 | * creating an object store | |
110 | */ | |
111 | 2 | protected ObjectStore findStore( |
112 | final ObjectStoreCommand command ) | |
113 | throws | |
114 | ObjectStoreCommandNotSupportedException, | |
115 | ObjectStoreException { | |
116 | ||
117 | 2 | final Class storeClass = (Class)dispatchMap_.get(command.getClass()); |
118 | 2 | if( storeClass == null ) { |
119 | 1 | throw new ObjectStoreCommandNotSupportedException(command); |
120 | } | |
121 | ||
122 | 1 | try { |
123 | 1 | final ObjectStore store = (ObjectStore)storeClass.newInstance(); |
124 | 1 | store.setResourceFactoryMap(resourceFactoryMap_); |
125 | 1 | return store; |
126 | } | |
127 | catch( IllegalAccessException e ) { | |
128 | 0 | throw new ObjectStoreException(e); |
129 | } | |
130 | catch( final InstantiationException e ) { | |
131 | 0 | throw new ObjectStoreException(e); |
132 | } | |
133 | } | |
134 | } |
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