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Java > Open Source Codes > org > apache > hivemind > service > impl > ServiceObjectProvider


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.hivemind.service.impl;
16
17 import org.apache.hivemind.HiveMind;
18 import org.apache.hivemind.Location;
19 import org.apache.hivemind.internal.Module;
20 import org.apache.hivemind.service.ObjectProvider;
21
22 /**
23  * An {@link org.apache.hivemind.service.ObjectProvider} that provides access to services. Returns
24  * null if the input is null. Deployed with the prefix "service".
25  *
26  * @author Howard Lewis Ship
27  */
28 public class ServiceObjectProvider implements ObjectProvider
29 {
30     /**
31      * Interprets the locator as a service id, and passes it to
32      * {@link Module#getService(String, Class)}.
33      */
34     public Object JavaDoc provideObject(Module contributingModule, Class JavaDoc propertyType, String JavaDoc locator,
35             Location location)
36     {
37         if (HiveMind.isBlank(locator))
38             return null;
39
40         return contributingModule.getService(locator, Object JavaDoc.class);
41     }
42
43 }
44
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