Source Code Cross Referenced for WelcomeEditorInputFactory.java in  » IDE-Eclipse » ui-ide » org » eclipse » ui » internal » ide » dialogs » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Eclipse » ui ide » org.eclipse.ui.internal.ide.dialogs 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*******************************************************************************
02:         * Copyright (c) 2000, 2006 IBM Corporation and others.
03:         * All rights reserved. This program and the accompanying materials
04:         * are made available under the terms of the Eclipse Public License v1.0
05:         * which accompanies this distribution, and is available at
06:         * http://www.eclipse.org/legal/epl-v10.html
07:         *
08:         * Contributors:
09:         *     IBM Corporation - initial API and implementation
10:         *******************************************************************************/package org.eclipse.ui.internal.ide.dialogs;
11:
12:        import org.eclipse.core.runtime.IAdaptable;
13:        import org.eclipse.ui.IElementFactory;
14:        import org.eclipse.ui.IMemento;
15:        import org.eclipse.ui.internal.ide.AboutInfo;
16:
17:        /**
18:         * A simple factory for the welcome editor
19:         */
20:        public class WelcomeEditorInputFactory implements  IElementFactory {
21:            /**
22:             * WelcomeEditorInputFactory constructor comment.
23:             */
24:            public WelcomeEditorInputFactory() {
25:                super ();
26:            }
27:
28:            /**
29:             * Re-creates and returns an object from the state captured within the given 
30:             * memento. 
31:             * <p>
32:             * Under normal circumstances, the resulting object can be expected to be
33:             * persistable; that is,
34:             * <pre>
35:             * result.getAdapter(org.eclipse.ui.IPersistableElement.class)
36:             * </pre>
37:             * should not return <code>null</code>.
38:             * </p>
39:             *
40:             * @param memento a memento containing the state for the object
41:             * @return an object, or <code>null</code> if the element could not be created
42:             */
43:            public IAdaptable createElement(IMemento memento) {
44:                // Get the feature id.
45:                String versionedFeatureId = memento
46:                        .getString(WelcomeEditorInput.FEATURE_ID);
47:                if (versionedFeatureId == null) {
48:                    return null;
49:                }
50:                int colonPos = versionedFeatureId.indexOf(':');
51:                if (colonPos == -1) {
52:                    // assume the memento is stale or mangled
53:                    return null;
54:                }
55:                String featureId = versionedFeatureId.substring(0, colonPos);
56:                String versionId = versionedFeatureId.substring(colonPos + 1);
57:                // @issue using feature id for plug-in id
58:                AboutInfo info = AboutInfo
59:                        .readFeatureInfo(featureId, versionId);
60:                if (info == null) {
61:                    return null;
62:                }
63:                return new WelcomeEditorInput(info);
64:            }
65:        }
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