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IAsset.java | - | - | - | - |
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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.tapestry; | |
16 | ||
17 | import java.io.InputStream; | |
18 | ||
19 | import org.apache.hivemind.Locatable; | |
20 | import org.apache.hivemind.Resource; | |
21 | ||
22 | /** | |
23 | * Representation of a asset (GIF, JPEG, etc.) that may be owned by a {@link IComponent}. | |
24 | * <p> | |
25 | * Assets may be completely external (i.e., on some other web site), contained by the | |
26 | * {@link javax.servlet.ServletContext}, or stored somewhere in the classpath. | |
27 | * <p> | |
28 | * In the latter two cases, the resource may be localized. | |
29 | * | |
30 | * @author Howard Lewis Ship | |
31 | */ | |
32 | ||
33 | public interface IAsset extends Locatable | |
34 | { | |
35 | /** | |
36 | * Returns a URL for the asset, ready to be inserted into the output HTML. If the asset can be | |
37 | * localized, the localized version (matching the {@link java.util.Locale}of the current | |
38 | * {@link IPage page}) is returned. | |
39 | * | |
40 | * @throws ApplicationRuntimeException | |
41 | * if the asset does not exist. | |
42 | */ | |
43 | ||
44 | public String buildURL(IRequestCycle cycle); | |
45 | ||
46 | /** | |
47 | * Accesses the localized version of the resource (if possible) and returns it as an input | |
48 | * stream. A version of the resource localized to the current {@link IPage page}is returned. | |
49 | * | |
50 | * @throws ApplicationRuntimeException | |
51 | * if the asset does not exist, or can't be read. | |
52 | */ | |
53 | ||
54 | public InputStream getResourceAsStream(IRequestCycle cycle); | |
55 | ||
56 | /** | |
57 | * Returns the underlying location of the asset. | |
58 | */ | |
59 | ||
60 | public Resource getResourceLocation(); | |
61 | } |
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