bundles/org.eclipse.team.core/src/org/eclipse/team/internal/core/TeamPlugin.java

/*******************************************************************************
 * Copyright (c) 2000, 2005 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.team.internal.core;

import java.io.IOException;
import java.io.InputStream;
import java.util.*;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.*;
import org.eclipse.core.runtime.content.IContentDescription;
import org.eclipse.core.runtime.content.IContentTypeManager;
import org.eclipse.team.core.*;
import org.osgi.framework.BundleContext;

/**
 * <code>TeamPlugin</code> is the plug-in runtime class for the Team 
 * resource management plugin.
 * <p>
 * 
 * @see Team
 * @see RepositoryProvider
 * 
 * @since 2.0
 */
final public class TeamPlugin extends Plugin {

	// The id of the core team plug-in
	public static final String ID = "org.eclipse.team.core"; //$NON-NLS-1$

	// The id of the providers extension point
	public static final String PROVIDER_EXTENSION = "repository-provider-type"; //$NON-NLS-1$
	
	// The id of the file types extension point
	public static final String FILE_TYPES_EXTENSION = "fileTypes"; //$NON-NLS-1$
	
	// The id of the global ignore extension point
	public static final String IGNORE_EXTENSION = "ignore"; //$NON-NLS-1$
	// The id of the project set extension point
	public static final String PROJECT_SET_EXTENSION = "projectSets"; //$NON-NLS-1$
	// The id of the repository extension point
	public static final String REPOSITORY_EXTENSION = "repository"; //$NON-NLS-1$
	// The id of the default file modification vaidator extension point
	public static final String DEFAULT_FILE_MODIFICATION_VALIDATOR_EXTENSION = "defaultFileModificationValidator"; //$NON-NLS-1$


	// The one and only plug-in instance
	private static TeamPlugin plugin;	

	/** 
	 * Constructs a plug-in runtime class.
	 */
	public TeamPlugin() {
		super();
		plugin = this;
	}
	
	/**
	 * @see Plugin#start(BundleContext)
	 */
	public void start(BundleContext context) throws Exception {
		super.start(context);
		Team.startup();
	}
	
	/**
	 * @see Plugin#stop(BundleContext)
	 */
	public void stop(BundleContext context) throws Exception {
		try {
			Team.shutdown();
			ResourceVariantCache.shutdown();
		} finally {
			super.stop(context);
		}
	}
	
	/**
	 * Returns the Team plug-in.
	 *
	 * @return the single instance of this plug-in runtime class
	 */
	public static TeamPlugin getPlugin() {
		return plugin;
	}
	
	/**
	 * Log the given exception alloing with the provided message and severity indicator
	 */
	public static void log(int severity, String message, Throwable e) {
		plugin.getLog().log(new Status(severity, ID, 0, message, e));
	}
	
	/**
	 * Log the given CoreException in a manner that will include the stacktrace of
	 * the exception in the log.
	 */
	public static void log(CoreException e) {
		log(e.getStatus().getSeverity(), e.getMessage(), e);
	}
	
	/*
	 * Static helper methods for creating exceptions
	 */
	public static TeamException wrapException(Exception e) {
		return new TeamException(new Status(IStatus.ERROR, ID, 0, e.getMessage() != null ? e.getMessage() : "",	e)); //$NON-NLS-1$
	}
	
	public static TeamException wrapException(CoreException e) {
		IStatus status = e.getStatus();
		return new TeamException(new Status(status.getSeverity(), ID, status.getCode(), status.getMessage(), e));
	}
	
	public static String getCharset(String name, InputStream stream) throws IOException {
		IContentDescription description = getContentDescription(name, stream);
		return description == null ? null : description.getCharset();

	}
	public static IContentDescription getContentDescription(String name, InputStream stream) throws IOException  {
		// tries to obtain a description for this file contents
		IContentTypeManager contentTypeManager = Platform.getContentTypeManager();
		try {
			return contentTypeManager.getDescriptionFor(stream, name, IContentDescription.ALL);
		} finally {
			if (stream != null)
				try {
					stream.close();
				} catch (IOException e) {
					// Ignore exceptions on close
				}
		}
	}
	
	public static RepositoryProviderType getAliasType(String id) {
		IExtensionPoint extension = Platform.getExtensionRegistry().getExtensionPoint(TeamPlugin.ID, TeamPlugin.REPOSITORY_EXTENSION);
		if (extension != null) {
			IExtension[] extensions =  extension.getExtensions();
			for (int i = 0; i < extensions.length; i++) {
				IConfigurationElement [] configElements = extensions[i].getConfigurationElements();
				for (int j = 0; j < configElements.length; j++) {
				    String aliasId = configElements[j].getAttribute("canImportId"); //$NON-NLS-1$
				    if (aliasId != null && aliasId.equals(id)) {
						String extensionId = configElements[j].getAttribute("id"); //$NON-NLS-1$
						if (extensionId != null) {
							return RepositoryProviderType.getProviderType(extensionId);
						}
				    }
				}
			}
		}		
		return null;
	}
	
	public static IPath[] getMetaFilePaths(String id) {
		IExtensionPoint extension = Platform.getExtensionRegistry().getExtensionPoint(TeamPlugin.ID, TeamPlugin.REPOSITORY_EXTENSION);
		if (extension != null) {
			IExtension[] extensions =  extension.getExtensions();
			for (int i = 0; i < extensions.length; i++) {
				IConfigurationElement [] configElements = extensions[i].getConfigurationElements();
				for (int j = 0; j < configElements.length; j++) {
					String extensionId = configElements[j].getAttribute("id"); //$NON-NLS-1$
				    String metaFilePaths = configElements[j].getAttribute("metaFilePaths"); //$NON-NLS-1$
				    if (extensionId != null && extensionId.equals(id) && metaFilePaths != null) {
						return getPaths(metaFilePaths);
						
				    }
				}
			}
		}		
		return null;
	}

	private static IPath[] getPaths(String metaFilePaths) {
		List result = new ArrayList();
		StringTokenizer t = new StringTokenizer(metaFilePaths, ","); //$NON-NLS-1$
		while (t.hasMoreTokens()) {
			String next = t.nextToken();
			IPath path = new Path(null, next);
			result.add(path);
		}
		return (IPath[]) result.toArray(new IPath[result.size()]);
	}

}