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Java > Open Source Codes > nextapp > echo2 > webcontainer > image > ImageTools


1 /*
2  * This file is part of the Echo Web Application Framework (hereinafter "Echo").
3  * Copyright (C) 2002-2005 NextApp, Inc.
4  *
5  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6  *
7  * The contents of this file are subject to the Mozilla Public License Version
8  * 1.1 (the "License"); you may not use this file except in compliance with
9  * the License. You may obtain a copy of the License at
10  * http://www.mozilla.org/MPL/
11  *
12  * Software distributed under the License is distributed on an "AS IS" basis,
13  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14  * for the specific language governing rights and limitations under the
15  * License.
16  *
17  * Alternatively, the contents of this file may be used under the terms of
18  * either the GNU General Public License Version 2 or later (the "GPL"), or
19  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
20  * in which case the provisions of the GPL or the LGPL are applicable instead
21  * of those above. If you wish to allow use of your version of this file only
22  * under the terms of either the GPL or the LGPL, and not to allow others to
23  * use your version of this file under the terms of the MPL, indicate your
24  * decision by deleting the provisions above and replace them with the notice
25  * and other provisions required by the GPL or the LGPL. If you do not delete
26  * the provisions above, a recipient may use your version of this file under
27  * the terms of any one of the MPL, the GPL or the LGPL.
28  */
29
30 package nextapp.echo2.webcontainer.image;
31
32 import nextapp.echo2.app.AwtImageReference;
33 import nextapp.echo2.app.Component;
34 import nextapp.echo2.app.HttpImageReference;
35 import nextapp.echo2.app.ImageReference;
36 import nextapp.echo2.app.StreamImageReference;
37 import nextapp.echo2.webcontainer.RenderContext;
38
39 /**
40  * Main application interface to application container image rendering API.
41  */
42 public class ImageTools {
43     
44     /**
45      * Retrieves the URI to render an image for a component.
46      *
47      * @param rc the relevant <code>RenderContext</code>
48      * @param irs the <code>ImageRenderSupport</code>-implementing
49      * <code>ComponentSynchronizePeer</code>.
50      * @param component the component for which the image is being rendered
51      * @param imageId the component-specific id of the image
52      * @return the URI
53      */
54     public static String JavaDoc getUri(RenderContext rc, ImageRenderSupport irs, Component component, String JavaDoc imageId) {
55         ImageReference imageReference = irs.getImage(component, imageId);
56         if (imageReference instanceof StreamImageReference) {
57             rc.getContainerInstance().getIdTable().register(imageReference);
58             return StreamImageService.INSTANCE.createUri(rc.getContainerInstance(), imageReference.getRenderId());
59         } else if (imageReference instanceof HttpImageReference) {
60             return ((HttpImageReference) imageReference).getUri();
61         } else if (imageReference instanceof AwtImageReference) {
62             rc.getContainerInstance().getIdTable().register(imageReference);
63             return AwtImageService.INSTANCE.createUri(rc.getContainerInstance(), imageReference.getRenderId());
64         } else {
65             throw new IllegalArgumentException JavaDoc("Unsupported image type.");
66         }
67     }
68 }
69
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