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Java > Open Source Codes > org > directwebremoting > guice > InternalCreator


1 /*
2  * Copyright 2007 Tim Peierls
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.directwebremoting.guice;
17
18 import com.google.inject.Key;
19 import com.google.inject.Injector;
20
21 import java.util.Map JavaDoc;
22
23 import org.directwebremoting.extend.Creator;
24
25 /**
26  * Specialized creator implementation that uses an injector to
27  * look up its instances. This class is used by {@link InternalCreatorManager}.
28  * @author Tim Peierls [tim at peierls dot net]
29  */
30 class InternalCreator implements Creator
31 {
32     InternalCreator(Injector injector, Key key, String JavaDoc scriptName)
33     {
34         this.injector = injector;
35         this.key = key;
36         this.scriptName = scriptName;
37     }
38
39     public void setProperties(Map JavaDoc params) throws IllegalArgumentException JavaDoc
40     {
41         // Do nothing, we ignore properties (since we inject everything we create).
42 }
43
44     public Class JavaDoc getType()
45     {
46         return (Class JavaDoc) key.getTypeLiteral().getType();
47     }
48     
49     public Object JavaDoc getInstance() throws InstantiationException JavaDoc
50     {
51         return injector.getInstance(key);
52     }
53
54     public String JavaDoc getScope()
55     {
56         return Creator.PAGE; // i.e., tell DWR always to create
57 }
58
59     public boolean isCacheable()
60     {
61         return true;
62     }
63
64     public String JavaDoc getJavascript()
65     {
66         return scriptName;
67     }
68     
69     private final Injector injector;
70     private final Key key;
71     private final String JavaDoc scriptName;
72 }
73
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