bundles/core/org.eclipse.apogy.core/src/org/eclipse/apogy/core/WorksiteContributorsRegistry.java

/*******************************************************************************
 * Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency
 * 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:
 *     Pierre Allard,
 *     Regent L'Archeveque,  
 *     Sebastien Gemme - initial API and implementation
 * 
 * SPDX-License-Identifier: EPL-1.0
 * 
 *******************************************************************************/
package org.eclipse.apogy.core;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.Platform;
import org.eclipse.emf.common.util.URI;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class WorksiteContributorsRegistry {
	private static final Logger Logger = LoggerFactory.getLogger(WorksiteContributorsRegistry.class);

	public static final String WORKSITE_CONTRIBUTORS_POINT_ID = "org.eclipse.apogy.core.worksiteProvider";
	public static final String WORKSITE_CONTRIBUTORS_NAME_ID = "Name";
	public static final String WORKSITE_CONTRIBUTORS_DESCRIPTION_ID = "Description";
	public static final String WORKSITE_CONTRIBUTORS_URI_ID = "URI";

	private List<WorksiteContributor> registeredWorksiteProviders = null;

	public WorksiteContributorsRegistry() {
	}

	public List<WorksiteContributor> getRegisteredWorksiteProviders() {
		if (this.registeredWorksiteProviders == null) {
			this.registeredWorksiteProviders = new ArrayList<WorksiteContributor>();

			IExtensionPoint extensionPoint = Platform.getExtensionRegistry()
					.getExtensionPoint(WORKSITE_CONTRIBUTORS_POINT_ID);

			IConfigurationElement[] contributors = extensionPoint.getConfigurationElements();

			for (int i = 0; i < contributors.length; i++) {
				IConfigurationElement contributor = contributors[i];

				try {
					String name = contributor.getAttribute(WORKSITE_CONTRIBUTORS_NAME_ID);
					String description = contributor.getAttribute(WORKSITE_CONTRIBUTORS_DESCRIPTION_ID);
					String uriString = contributor.getAttribute(WORKSITE_CONTRIBUTORS_URI_ID);

					URI uri = URI.createURI(
							"platform:/plugin/" + contributor.getNamespaceIdentifier() + "/" + uriString, true);

					WorksiteContributor sessionContributor = new WorksiteContributor(name, description, uri);
					this.registeredWorksiteProviders.add(sessionContributor);
				} catch (Exception e) {
					Logger.error(e.getMessage(), e);
				}
			}

			Logger.debug("Worksite Contributors :");
			for (WorksiteContributor worksiteContributor : this.registeredWorksiteProviders) {
				Logger.debug("\t Name        : " + worksiteContributor.name);
				Logger.debug("\t Description : " + worksiteContributor.description);
				Logger.debug("\t URI         : " + worksiteContributor.uri);
			}
			Logger.info("Found <" + this.registeredWorksiteProviders.size() + "> registered Worksite Providers.");
		}

		return this.registeredWorksiteProviders;
	}
}