| //------------------------------------------------------------------------------ |
| // Copyright (c) 2005, 2008 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 implementation |
| //------------------------------------------------------------------------------ |
| package org.eclipse.epf.authoring.ui.providers; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.IExtension; |
| import org.eclipse.core.runtime.IExtensionPoint; |
| import org.eclipse.core.runtime.IExtensionRegistry; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.epf.authoring.ui.AuthoringUIPlugin; |
| import org.osgi.framework.Bundle; |
| |
| /** |
| * Manages the <ColumnElement> elements defined via the |
| * "org.eclipse.epf.authoring.ui.descriptionPageColumnProvider" extension point. |
| * |
| * @author Shilpa Toraskar |
| * @since 1.5 |
| */ |
| public class DescriptionPageColumnProvider { |
| |
| /** |
| * The extension namespace. |
| */ |
| public static final String COLUMN_PROVIDERS_EXTENSION_NAMESPACE = "org.eclipse.epf.authoring.ui"; //$NON-NLS-1$ |
| |
| /** |
| * The extension name. |
| */ |
| public static final String COLUMN_PROVIDERS_EXTENSION_NAME = "descriptionPageColumnProvider"; //$NON-NLS-1$ |
| |
| /** |
| * The extension Attributes |
| */ |
| public static final String COLUMN_PROVIDER_EXTENSION_ATTR_ID = "id"; //$NON-NLS-1$ |
| |
| public static final String COLUMN_PROVIDER_EXTENSION_ATTR_WIDTH = "width"; //$NON-NLS-1$ |
| |
| public static final String COLUMN_PROVIDER_EXTENSION_ATTR_ALIGNMENT = "align"; //$NON-NLS-1$ |
| |
| public static final String COLUMN_PROVIDER_EXTENSION_ATTR_CLASS = "class"; //$NON-NLS-1$ |
| |
| private static final int COLUMN_DEFAULT_WIDTH = 20; //$NON-NLS-1$ |
| |
| // Contains the editor column providers loaded via the |
| // "org.eclipse.epf.authoring.ui.descriptionPageColumnProvider" extension point. |
| private ArrayList columnProviders = new ArrayList(); |
| |
| // The shared instance. |
| private static DescriptionPageColumnProvider instance = null; |
| |
| public static DescriptionPageColumnProvider getInstance() { |
| if (instance == null) { |
| synchronized (DescriptionPageColumnProvider.class) { |
| if (instance == null) { |
| instance = new DescriptionPageColumnProvider(); |
| } |
| } |
| } |
| return instance; |
| } |
| |
| |
| /** |
| * Creates a new instance. |
| */ |
| private DescriptionPageColumnProvider() { |
| |
| } |
| |
| /** |
| * Returns all the column providers |
| * |
| * @return all the column providers. |
| */ |
| public List getColumnProviders() { |
| // List columns = new ArrayList(); |
| // for (int i = 0; i < columnProviders.size(); i++) { |
| // ColumnElement element = (ColumnElement) columnProviders |
| // .get(i); |
| // Object contributorClass = null; |
| // try { |
| // contributorClass = element.getContributorClass(); |
| // } catch (Exception e) { |
| // } |
| // columns.add(contributorClass); |
| // } |
| // return columns; |
| return columnProviders; |
| } |
| |
| /** |
| * Loads the configuration providers specified via the |
| * "descriptionPageColumnProvider" extension point. |
| */ |
| public void loadProviders() { |
| IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry(); |
| IExtensionPoint extensionPoint = extensionRegistry.getExtensionPoint( |
| COLUMN_PROVIDERS_EXTENSION_NAMESPACE, |
| COLUMN_PROVIDERS_EXTENSION_NAME); |
| if (extensionPoint != null) { |
| IExtension[] extensions = extensionPoint.getExtensions(); |
| for (int i = 0; i < extensions.length; i++) { |
| IExtension extension = extensions[i]; |
| String pluginId = extension.getNamespaceIdentifier(); |
| Bundle bundle = Platform.getBundle(pluginId); |
| |
| IConfigurationElement[] configElements = extension.getConfigurationElements(); |
| for (int j = 0; j < configElements.length; j++) { |
| IConfigurationElement configElement = configElements[j]; |
| try { |
| String id = configElement |
| .getAttribute(COLUMN_PROVIDER_EXTENSION_ATTR_ID); |
| String widthStr = configElement |
| .getAttribute(COLUMN_PROVIDER_EXTENSION_ATTR_WIDTH); |
| int width = parseWidth(widthStr); |
| String alignment = configElement.getAttribute(COLUMN_PROVIDER_EXTENSION_ATTR_ALIGNMENT); |
| String contributorClass = configElement |
| .getAttribute(COLUMN_PROVIDER_EXTENSION_ATTR_CLASS); |
| ColumnElement element = new ColumnElement(bundle, |
| id, width, alignment, contributorClass); |
| columnProviders.add(element); |
| } catch (Exception e) { |
| AuthoringUIPlugin.getDefault().getLogger().logError( |
| "Failed to load Editor column Provider", e); //$NON-NLS-1$ |
| } |
| } |
| } |
| } |
| } |
| |
| |
| private static int parseWidth(String str) { |
| try { |
| return Integer.parseInt(str); |
| } |
| catch(NumberFormatException e) { |
| AuthoringUIPlugin.getDefault().getLogger().logError(e); |
| return COLUMN_DEFAULT_WIDTH; |
| } |
| } |
| } |