| /******************************************************************************* |
| * Copyright (c) 2004, 2007 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.ui.internal.intro.impl.model.loader; |
| |
| import org.eclipse.ui.internal.intro.impl.model.ExtensionMap; |
| import org.eclipse.ui.internal.intro.impl.model.IntroModelRoot; |
| import org.eclipse.ui.internal.intro.impl.util.Log; |
| |
| /** |
| * Manages all Intro plugin extension points. Currently, there are two: |
| * org.eclipse.ui.intro.config & org.eclipse.ui.intro.configExtension. <br> |
| * The model is lazily loaded on per need basis. This happens when a page is |
| * asked for its children, or when the model is trying to resolve includes or |
| * extensions. <br> |
| */ |
| |
| public class ExtensionPointManager extends BaseExtensionPointManager { |
| |
| // singleton instance. Can be retrieved from here or from the Intro Plugin. |
| private static ExtensionPointManager inst = new ExtensionPointManager(); |
| |
| // The root model class that represents a full/combined OOBBE config. This |
| // model is loaded based on an introId when the customizableIntroPart tries |
| // to load a model based on introId. This is different when includes and |
| // extension aer resolved because in tnose cases models are being loaded |
| // given an id and not an introId. |
| private IntroModelRoot currentModel; |
| |
| // the id of the intro part contribution who's model (config) we are trying |
| // to load. The customizableIntroPart loads this id and loads the model that |
| // is bound to this intro id (ie: has this id as an introId). |
| private String introId; |
| |
| /* |
| * Prevent creation. |
| */ |
| private ExtensionPointManager() { |
| super(); |
| } |
| |
| /** |
| * @return Returns the inst. |
| */ |
| public static ExtensionPointManager getInst() { |
| return inst; |
| } |
| |
| /** |
| * Load the intro model given the current intro id. |
| */ |
| private void loadCurrentModel() { |
| currentModel = loadModel(ATT_CONFIG_INTRO_ID, this.introId); |
| } |
| |
| /** |
| * @return Returns the Intro Model root. Note: Prefereed way of getting to |
| * the intro model root is throught the intro plugin. |
| */ |
| public IntroModelRoot getCurrentModel() { |
| if (currentModel == null) |
| // we never loaded this model before, or we tried before and we |
| // failed. Load it. Get the correct config element based on |
| // config introId, and log any extra contributions. |
| loadCurrentModel(); |
| return currentModel; |
| } |
| |
| /** |
| * Load an intro model given a config id. |
| * |
| * @param configId |
| * @return |
| */ |
| public IntroModelRoot getModel(String configId) { |
| IntroModelRoot model = getCachedModel(configId); |
| if (model == null) { |
| // we never loaded this model before, or we tried before and we |
| // failed. Load it. Get the correct config element based on |
| // config id, and log any extra contributions. |
| model = loadModel(ATT_ID, configId); |
| } |
| return model; |
| } |
| |
| /** |
| * @param introPartId |
| * The introPartId to set. |
| */ |
| public void setIntroId(String introId) { |
| this.introId = introId; |
| // we do not have to clean model here. remove cached model, if it |
| // exists. |
| this.currentModel = null; |
| } |
| |
| public void clear() { |
| currentModel = null; |
| sharedConfigExtensionsManager = null; |
| introModels.clear(); |
| ExtensionMap.getInstance().clear(); |
| if (Log.logInfo) |
| Log.info("Cleared Intro model"); //$NON-NLS-1$ |
| } |
| |
| |
| } |