bundles/org.eclipse.team.core/src/org/eclipse/team/core/Team.java - platform/eclipse.platform.team - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2017 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.team.core;

 import java.io.DataInputStream;
 import java.io.EOFException;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.NoSuchElementException;
 import java.util.SortedMap;
 import java.util.StringTokenizer;
 import java.util.TreeMap;

 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IResourceChangeEvent;
 import org.eclipse.core.resources.IStorage;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.core.runtime.IExtension;
 import org.eclipse.core.runtime.IExtensionPoint;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.Preferences;
 import org.eclipse.core.runtime.RegistryFactory;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.runtime.content.IContentType;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.team.core.importing.provisional.IBundleImporter;
 import org.eclipse.team.core.mapping.IStorageMerger;
 import org.eclipse.team.internal.core.FileContentManager;
 import org.eclipse.team.internal.core.Messages;
 import org.eclipse.team.internal.core.Policy;
 import org.eclipse.team.internal.core.StorageMergerRegistry;
 import org.eclipse.team.internal.core.WildcardStringMatcher;
 import org.eclipse.team.internal.core.TeamPlugin;
 import org.eclipse.team.internal.core.TeamResourceChangeListener;
 import org.eclipse.team.internal.core.importing.BundleImporterExtension;

 /**
  * The Team class provides a global point of reference for the global ignore set
  * and the text/binary registry.
  *
  * @since 2.0
  */
 public final class Team {

 	private static class StringMappingWrapper implements IFileTypeInfo {

 		private final IStringMapping fMapping;

 		public StringMappingWrapper(IStringMapping mapping) {
 			fMapping= mapping;
 		}

 		@Override
 		public String getExtension() {
 			return fMapping.getString();
 		}

 		@Override
 		public int getType() {
 			return fMapping.getType();
 		}

 	}

 	private static final String PREF_TEAM_IGNORES = "ignore_files"; //$NON-NLS-1$
 	private static final String PREF_TEAM_SEPARATOR = "\n"; //$NON-NLS-1$
 	public static final Status OK_STATUS = new Status(IStatus.OK, TeamPlugin.ID, IStatus.OK, Messages.ok, null);

 	// File type constants
 	public static final int UNKNOWN = 0;
 	public static final int TEXT = 1;
 	public static final int BINARY = 2;


 	// The ignore list that is read at startup from the persisted file
 	protected static SortedMap<String, Boolean> globalIgnore, pluginIgnore;
 	private static WildcardStringMatcher[] ignoreMatchers;

 	private final static FileContentManager fFileContentManager;

 	private static List<IBundleImporter> fBundleImporters;

 	static {
 		fFileContentManager= new FileContentManager();
 	}


 	/**
 	 * Return the type of the given IStorage. First, we check whether a mapping has
 	 * been defined for the name of the IStorage. If this is not the case, we check for
 	 * a mapping with the extension. If no mapping is defined, UNKNOWN is returned.
 	 *
 	 * Valid return values are:
 	 * Team.TEXT
 	 * Team.BINARY
 	 * Team.UNKNOWN
 	 *
 	 * @param storage  the IStorage
 	 * @return whether the given IStorage is TEXT, BINARY, or UNKNOWN
 	 *
 	 * @deprecated Use <code>getFileContentManager().getType(IStorage storage)</code> instead.
 	 */
 	@Deprecated
 	public static int getType(IStorage storage) {
 		return fFileContentManager.getType(storage);
 	}

 	/**
 	 * Returns whether the given file or folder with its content should be ignored.
 	 *
 	 * This method answers true if the file matches one of the global ignore
 	 * patterns, or if the file is marked as derived.
 	 *
 	 * @param resource the file or folder
 	 * @return whether the file should be ignored
 	 */
 	public static boolean isIgnoredHint(IResource resource) {
 		if (resource.isDerived()) return true;
 		return matchesEnabledIgnore(resource);
 	}

 	/**
 	 * Returns whether the given file should be ignored.
 	 * @param file file to check
 	 * @return <code>true</code> if this file should be ignored, and <code>false</code> otherwise
 	 * @deprecated use isIgnoredHint(IResource) instead
 	 */
 	@Deprecated
 	public static boolean isIgnoredHint(IFile file) {
 		if (file.isDerived()) return true;
 		return matchesEnabledIgnore(file);
 	}

 	private static boolean matchesEnabledIgnore(IResource resource) {
 		WildcardStringMatcher[] matchers = getStringMatchers();
 		for (WildcardStringMatcher matcher : matchers) {
 			String resourceName = resource.getName();
 			if (matcher.isPathPattern()) {
 				resourceName = resource.getFullPath().toString();
 			}
 			if (matcher.match(resourceName)) {
 				return true;
 			}
 		}
 		return false;
 	}

 	/**
 	 * Returns whether the given file should be ignored.
 	 * @param file file to check
 	 * @return <code>true</code> if this file should be ignored, and <code>false</code> otherwise
 	 * @deprecated use isIgnoredHint instead
 	 */
 	@Deprecated
 	public static boolean isIgnored(IFile file) {
 		return matchesEnabledIgnore(file);
 	}


 	/**
 	 * Return all known file types.
 	 *
 	 * @return all known file types
 	 * @deprecated Use <code>getFileContentManager().getExtensionMappings()</code> instead.
 	 */
 	@Deprecated
 	public static IFileTypeInfo[] getAllTypes() {
 		final IStringMapping [] mappings= fFileContentManager.getExtensionMappings();
 		final IFileTypeInfo [] infos= new IFileTypeInfo[mappings.length];
 		for (int i = 0; i < infos.length; i++) {
 			infos[i]= new StringMappingWrapper(mappings[i]);
 		}
 		return infos;
 	}

 	/**
 	 * Returns the list of global ignores.
 	 * @return all ignore infos representing globally ignored patterns
 	 */
 	public synchronized static IIgnoreInfo[] getAllIgnores() {
 		// The ignores are cached and when the preferences change the
 		// cache is cleared. This makes it faster to lookup without having
 		// to re-parse the preferences.
 		initializeIgnores();
 		IIgnoreInfo[] result = getIgnoreInfo(globalIgnore);
 		return result;
 	}

 	private static void initializeIgnores() {
 		if (globalIgnore == null) {
 			globalIgnore = new TreeMap<>();
 			pluginIgnore = new TreeMap<>();
 			ignoreMatchers = null;
 			try {
 				readIgnoreState();
 			} catch (TeamException e) {
 				TeamPlugin.log(IStatus.ERROR, Messages.Team_Error_loading_ignore_state_from_disk_1, e);
 			}
 			initializePluginIgnores(pluginIgnore, globalIgnore);
 		}
 	}

 	private static IIgnoreInfo[] getIgnoreInfo(Map gIgnore) {
 		IIgnoreInfo[] result = new IIgnoreInfo[gIgnore.size()];
 		Iterator e = gIgnore.entrySet().iterator();
 		int i = 0;
 		while (e.hasNext() ) {
 			Map.Entry entry = (Entry) e.next();
 			final String pattern = (String) entry.getKey();
 			final boolean enabled = ((Boolean)entry.getValue()).booleanValue();
 			result[i++] = new IIgnoreInfo() {
 				private String p = pattern;
 				private boolean e1 = enabled;
 				@Override
 				public String getPattern() {
 					return p;
 				}
 				@Override
 				public boolean getEnabled() {
 					return e1;
 				}
 			};
 		}
 		return result;
 	}

 	private synchronized static WildcardStringMatcher[] getStringMatchers() {
 		if (ignoreMatchers==null) {
 			IIgnoreInfo[] ignorePatterns = getAllIgnores();
 			ArrayList<WildcardStringMatcher> matchers = new ArrayList<>(ignorePatterns.length);
 			for (IIgnoreInfo ignorePattern : ignorePatterns) {
 				if (ignorePattern.getEnabled()) {
 					matchers.add(new WildcardStringMatcher(ignorePattern.getPattern()));
 				}
 			}
 			ignoreMatchers = new WildcardStringMatcher[matchers.size()];
 			ignoreMatchers = matchers.toArray(ignoreMatchers);
 		}
 		return ignoreMatchers;
 	}


 	/**
 	 * Set the file type for the give extensions. This
 	 * will replace the existing file types with this new list.
 	 *
 	 * Valid types are:
 	 * Team.TEXT
 	 * Team.BINARY
 	 * Team.UNKNOWN
 	 *
 	 * @param extensions  the file extensions
 	 * @param types  the file types
 	 *
 	 * @deprecated Use <code>getFileContentManager().setExtensionMappings()</code> instead.
 	 */
 	@Deprecated
 	public static void setAllTypes(String[] extensions, int[] types) {
 		fFileContentManager.addExtensionMappings(extensions, types);
 	}

 	/**
 	 * Add patterns to the list of global ignores.
 	 *
 	 * @param patterns Array of patterns to set
 	 * @param enabled Array of booleans indicating if given pattern is enabled
 	 */
 	public static void setAllIgnores(String[] patterns, boolean[] enabled) {
 		initializeIgnores();
 		globalIgnore = new TreeMap<>();
 		ignoreMatchers = null;
 		for (int i = 0; i < patterns.length; i++) {
 			globalIgnore.put(patterns[i], Boolean.valueOf(enabled[i]));
 		}
 		// Now set into preferences
 		StringBuilder buf = new StringBuilder();
 		for (Map.Entry entry : globalIgnore.entrySet()) {
 			String pattern = (String) entry.getKey();
 			Boolean value = (Boolean) entry.getValue();
 			boolean isCustom = (!pluginIgnore.containsKey(pattern)) ||
 					!pluginIgnore.get(pattern).equals(value);
 			if (isCustom) {
 				buf.append(pattern);
 				buf.append(PREF_TEAM_SEPARATOR);
 				boolean en = value.booleanValue();
 				buf.append(en);
 				buf.append(PREF_TEAM_SEPARATOR);
 			}
 		}
 		TeamPlugin.getPlugin().getPluginPreferences().setValue(PREF_TEAM_IGNORES, buf.toString());
 	}


 	/*
 	 * IGNORE
 	 *
 	 * Reads the ignores currently defined by extensions.
 	 */
 	private static void initializePluginIgnores(SortedMap<String, Boolean> pIgnore, SortedMap<String, Boolean> gIgnore) {
 		TeamPlugin plugin = TeamPlugin.getPlugin();
 		if (plugin != null) {
 			IExtensionPoint extension = Platform.getExtensionRegistry().getExtensionPoint(TeamPlugin.ID, TeamPlugin.IGNORE_EXTENSION);
 			if (extension != null) {
 				IExtension[] extensions =  extension.getExtensions();
 				for (IExtension ext : extensions) {
 					IConfigurationElement[] configElements = ext.getConfigurationElements();
 					for (IConfigurationElement configElement : configElements) {
 						String pattern = configElement.getAttribute("pattern"); //$NON-NLS-1$
 						if (pattern != null) {
 							String selected = configElement.getAttribute("enabled"); //$NON-NLS-1$
 							if (selected == null) {
 								// Check for selected because this used to be the field name
 								selected = configElement.getAttribute("selected"); //$NON-NLS-1$
 							}
 							boolean enabled = selected != null
 									&& selected.equalsIgnoreCase("true"); //$NON-NLS-1$
 							if (!pIgnore.containsKey(pattern)) {
 								pIgnore.put(pattern, Boolean.valueOf(enabled));
 							} else if (!Boolean.valueOf(enabled).equals(
 									pIgnore.get(pattern))) {
 								if(Policy.DEBUG){
 									TeamPlugin
 											.log(IStatus.WARNING,
 													NLS.bind(
 															Messages.Team_Conflict_occured_for_ignored_resources_pattern,
 															new Object[] {
 																	pattern,
 																	collectContributingExtentionsToDisplay(
 																			pattern,
 																			extensions) }),
 													null);
 								}
 								// if another plug-in already added this pattern
 								// change the value only to disabled
 								if (!enabled) {
 									pIgnore.put(pattern,
 											Boolean.FALSE);
 								}
 							}
 						}
 					}
 				}

 				Iterator<String> it = pIgnore.keySet().iterator();
 				while (it.hasNext()) {
 					String pattern = it.next();
 					if (!gIgnore.containsKey(pattern)) {
 						gIgnore.put(pattern, pIgnore.get(pattern));
 					}
 				}
 			}
 		}
 	}

 	private static String collectContributingExtentionsToDisplay(
 			String patternToFind, IExtension[] extensions) {
 		StringBuilder sb = new StringBuilder();
 		boolean isFirst = true;
 		for (IExtension extension : extensions) {
 			IConfigurationElement[] configElements = extension.getConfigurationElements();
 			for (IConfigurationElement configElement : configElements) {
 				if (patternToFind.equals(configElement.getAttribute("pattern"))) { //$NON-NLS-1$
 					if (!isFirst) {
 						sb.append(", "); //$NON-NLS-1$
 					}
 					isFirst = false;
 					sb.append(extension.getContributor().getName());
 				}
 			}
 		}
 		return sb.toString();
 	}

 	/*
 	 * IGNORE
 	 *
 	 * Reads global ignore preferences and populates globalIgnore
 	 */
 	private static void readIgnoreState() throws TeamException {
 		if (readBackwardCompatibleIgnoreState()) return;
 		Preferences pref = TeamPlugin.getPlugin().getPluginPreferences();
 		if (!pref.contains(PREF_TEAM_IGNORES)) return;
 		pref.addPropertyChangeListener(event -> {
 			// when a property is changed, invalidate our cache so that
 			// properties will be recalculated.
 			if(event.getProperty().equals(PREF_TEAM_IGNORES))
 				globalIgnore = null;
 		});
 		String prefIgnores = pref.getString(PREF_TEAM_IGNORES);
 		StringTokenizer tok = new StringTokenizer(prefIgnores, PREF_TEAM_SEPARATOR);
 		String pattern, enabled;
 		try {
 			while (true) {
 				pattern = tok.nextToken();
 				if (pattern.length()==0) return;
 				enabled = tok.nextToken();
 				globalIgnore.put(pattern, Boolean.valueOf(enabled));
 			}
 		} catch (NoSuchElementException e) {
 			return;
 		}
 	}

 	/*
 	 * For backward compatibility, we still look at if we have .globalIgnores
 	 */
 	private static boolean readBackwardCompatibleIgnoreState() throws TeamException {
 		String GLOBALIGNORE_FILE = ".globalIgnores"; //$NON-NLS-1$
 		IPath pluginStateLocation = TeamPlugin.getPlugin().getStateLocation().append(GLOBALIGNORE_FILE);
 		File f = pluginStateLocation.toFile();
 		if (!f.exists()) return false;
 		try {
 			try (DataInputStream dis = new DataInputStream(new FileInputStream(f))) {
 				int ignoreCount = 0;
 				try {
 					ignoreCount = dis.readInt();
 				} catch (EOFException e) {
 					// Ignore the exception, it will occur if there are no ignore
 					// patterns stored in the provider state file.
 					return false;
 				}
 				for (int i = 0; i < ignoreCount; i++) {
 					String pattern = dis.readUTF();
 					boolean enabled = dis.readBoolean();
 					globalIgnore.put(pattern, Boolean.valueOf(enabled));
 				}
 			}
 			f.delete();
 		} catch (FileNotFoundException e) {
 			// not a fatal error, there just happens not to be any state to read
 		} catch (IOException ex) {
 			throw new TeamException(new Status(IStatus.ERROR, TeamPlugin.ID, 0, Messages.Team_readError, ex));
 		}
 		return true;
 	}
 	/**
 	 * Initialize the registry, restoring its state.
 	 *
 	 * This method is called by the plug-in upon startup, clients should not call this method
 	 */
 	public static void startup() {
 		// Register a delta listener that will tell the provider about a project move and meta-file creation
 		ResourcesPlugin.getWorkspace().addResourceChangeListener(new TeamResourceChangeListener(), IResourceChangeEvent.POST_CHANGE);
 	}

 	/**
 	 * Shut down the registry, persisting its state.
 	 *
 	 * This method is called by the plug-in upon shutdown, clients should not call this method
 	 */
 	public static void shutdown() {
 		TeamPlugin.getPlugin().savePluginPreferences();
 	}
 	/**
 	 * @deprecated
 	 * 		Use {@link org.eclipse.team.core.RepositoryProviderType#getProjectSetCapability()}
 	 * 		to obtain an instance of {@link ProjectSetCapability} instead.
 	 */
 	@Deprecated
 	public static IProjectSetSerializer getProjectSetSerializer(String id) {
 		TeamPlugin plugin = TeamPlugin.getPlugin();
 		if (plugin != null) {
 			IExtensionPoint extension = RegistryFactory.getRegistry().getExtensionPoint(TeamPlugin.ID, TeamPlugin.PROJECT_SET_EXTENSION);
 			if (extension != null) {
 				IExtension[] extensions =  extension.getExtensions();
 				for (IExtension ext : extensions) {
 					IConfigurationElement[] configElements = ext.getConfigurationElements();
 					for (IConfigurationElement configElement : configElements) {
 						String extensionId = configElement.getAttribute("id"); //$NON-NLS-1$
 						if (extensionId != null && extensionId.equals(id)) {
 							try {
 								return (IProjectSetSerializer) configElement.createExecutableExtension("class"); //$NON-NLS-1$
 							} catch (CoreException e) {
 								TeamPlugin.log(e);
 								return null;
 							}
 						}
 					}
 				}
 			}
 		}
 		return null;
 	}


 	/**
 	 * Return the default ignore infos
 	 * (i.e. those that are specified in
 	 * plugin manifests).
 	 * @return the default ignore infos.
 	 * @since 3.0
 	 */
 	public static IIgnoreInfo[] getDefaultIgnores() {
 		SortedMap<String, Boolean> gIgnore = new TreeMap<>();
 		SortedMap<String, Boolean> pIgnore = new TreeMap<>();
 		initializePluginIgnores(pIgnore, gIgnore);
 		return getIgnoreInfo(gIgnore);
 	}

 	/**
 	 * TODO: change to file content manager
 	 * Return the default file type bindings
 	 * (i.e. those that are specified in
 	 * plugin manifests).
 	 * @return the default file type bindings
 	 * @since 3.0
 	 * @deprecated Use Team.getFileContentManager().getDefaultExtensionMappings() instead.
 	 */
 	@Deprecated
 	public static IFileTypeInfo[] getDefaultTypes() {
 		return asFileTypeInfo(getFileContentManager().getDefaultExtensionMappings());
 	}

 	private static IFileTypeInfo [] asFileTypeInfo(IStringMapping [] mappings) {
 		final IFileTypeInfo [] infos= new IFileTypeInfo[mappings.length];
 		for (int i = 0; i < infos.length; i++) {
 			infos[i]= new StringMappingWrapper(mappings[i]);
 		}
 		return infos;
 	}

 	/**
 	 * Get the file content manager which implements the API for manipulating the mappings between
 	 * file names, file extensions and content types.
 	 *
 	 * @return an instance of IFileContentManager
 	 *
 	 * @see IFileContentManager
 	 *
 	 * @since 3.1
 	 */
 	public static IFileContentManager getFileContentManager() {
 		return fFileContentManager;
 	}

 	/**
 	 * Creates a storage merger for the given content type.
 	 * If no storage merger is registered for the given content type <code>null</code> is returned.
 	 *
 	 * @param type the type for which to find a storage merger
 	 * @return a storage merger for the given type, or <code>null</code> if no
 	 *   storage merger has been registered
 	 *
 	 * @since 3.4
 	 */
 	public static IStorageMerger createMerger(IContentType type) {
 		return StorageMergerRegistry.getInstance().createStreamMerger(type);
 	}

 	/**
 	 * Creates a storage merger for the given file extension.
 	 * If no storage merger is registered for the file extension <code>null</code> is returned.
 	 *
 	 * @param extension the extension for which to find a storage merger
 	 * @return a stream merger for the given type, or <code>null</code> if no
 	 *   storage merger has been registered
 	 *
 	 * @since 3.4
 	 */
 	public static IStorageMerger createMerger(String extension) {
 		return StorageMergerRegistry.getInstance().createStreamMerger(extension);
 	}

 	/**
 	 * Creates a storage merger for the given content type.
 	 * If no storage merger is registered for the given content type <code>null</code> is returned.
 	 *
 	 * @param type the type for which to find a storage merger
 	 * @return a storage merger for the given type, or <code>null</code> if no
 	 *   storage merger has been registered
 	 * @deprecated Use {@link #createMerger(IContentType)} instead.
 	 * @since 3.2
 	 */
 	@Deprecated
 	public IStorageMerger createStorageMerger(IContentType type) {
 		return createMerger(type);
 	}

 	/**
 	 * Creates a storage merger for the given file extension.
 	 * If no storage merger is registered for the file extension <code>null</code> is returned.
 	 *
 	 * @param extension the extension for which to find a storage merger
 	 * @return a stream merger for the given type, or <code>null</code> if no
 	 *   storage merger has been registered
 	 * @deprecated Use {@link #createMerger(String)} instead.
 	 * @since 3.2
 	 */
 	@Deprecated
 	public IStorageMerger createStorageMerger(String extension) {
 		return createMerger(extension);
 	}

 	/**
 	 * Returns the available bundle importers.
 	 *
 	 * <p>
 	 * <strong>EXPERIMENTAL</strong>. This interface has been added as part of a
 	 * work in progress. There is no guarantee that this API will work or that
 	 * it will remain the same. Please do not use this API without consulting
 	 * with the Team team.
 	 * </p>
 	 *
 	 * @return IBundleImporter[] returns the available bundle importers
 	 * @since 3.6
 	 * @noreference This method is not intended to be referenced by clients.
 	 */
 	public synchronized static IBundleImporter[] getBundleImporters() {
 		if (fBundleImporters == null) {
 			fBundleImporters = new ArrayList<>();
 			IExtensionPoint point = Platform.getExtensionRegistry().getExtensionPoint(TeamPlugin.EXTENSION_POINT_BUNDLE_IMPORTERS);
 			if (point != null) {
 				IConfigurationElement[] infos = point.getConfigurationElements();
 				for (IConfigurationElement info : infos) {
 					fBundleImporters.add(new BundleImporterExtension(info));
 				}
 			}
 		}
 		return fBundleImporters.toArray(new IBundleImporter[fBundleImporters.size()]);
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2017 IBM Corporation and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.team.core;

	import java.io.DataInputStream;
	import java.io.EOFException;
	import java.io.File;
	import java.io.FileInputStream;
	import java.io.FileNotFoundException;
	import java.io.IOException;
	import java.util.ArrayList;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Map;
	import java.util.Map.Entry;
	import java.util.NoSuchElementException;
	import java.util.SortedMap;
	import java.util.StringTokenizer;
	import java.util.TreeMap;

	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.resources.IResourceChangeEvent;
	import org.eclipse.core.resources.IStorage;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IConfigurationElement;
	import org.eclipse.core.runtime.IExtension;
	import org.eclipse.core.runtime.IExtensionPoint;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.core.runtime.Preferences;
	import org.eclipse.core.runtime.RegistryFactory;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.core.runtime.content.IContentType;
	import org.eclipse.osgi.util.NLS;
	import org.eclipse.team.core.importing.provisional.IBundleImporter;
	import org.eclipse.team.core.mapping.IStorageMerger;
	import org.eclipse.team.internal.core.FileContentManager;
	import org.eclipse.team.internal.core.Messages;
	import org.eclipse.team.internal.core.Policy;
	import org.eclipse.team.internal.core.StorageMergerRegistry;
	import org.eclipse.team.internal.core.WildcardStringMatcher;
	import org.eclipse.team.internal.core.TeamPlugin;
	import org.eclipse.team.internal.core.TeamResourceChangeListener;
	import org.eclipse.team.internal.core.importing.BundleImporterExtension;

	/**
	* The Team class provides a global point of reference for the global ignore set
	* and the text/binary registry.
	*
	* @since 2.0
	*/
	public final class Team {

	private static class StringMappingWrapper implements IFileTypeInfo {

	private final IStringMapping fMapping;

	public StringMappingWrapper(IStringMapping mapping) {
	fMapping= mapping;
	}

	@Override
	public String getExtension() {
	return fMapping.getString();
	}

	@Override
	public int getType() {
	return fMapping.getType();
	}

	}

	private static final String PREF_TEAM_IGNORES = "ignore_files"; //$NON-NLS-1$
	private static final String PREF_TEAM_SEPARATOR = "\n"; //$NON-NLS-1$
	public static final Status OK_STATUS = new Status(IStatus.OK, TeamPlugin.ID, IStatus.OK, Messages.ok, null);

	// File type constants
	public static final int UNKNOWN = 0;
	public static final int TEXT = 1;
	public static final int BINARY = 2;


	// The ignore list that is read at startup from the persisted file
	protected static SortedMap<String, Boolean> globalIgnore, pluginIgnore;
	private static WildcardStringMatcher[] ignoreMatchers;

	private final static FileContentManager fFileContentManager;

	private static List<IBundleImporter> fBundleImporters;

	static {
	fFileContentManager= new FileContentManager();
	}


	/**
	* Return the type of the given IStorage. First, we check whether a mapping has
	* been defined for the name of the IStorage. If this is not the case, we check for
	* a mapping with the extension. If no mapping is defined, UNKNOWN is returned.
	*
	* Valid return values are:
	* Team.TEXT
	* Team.BINARY
	* Team.UNKNOWN
	*
	* @param storage the IStorage
	* @return whether the given IStorage is TEXT, BINARY, or UNKNOWN
	*
	* @deprecated Use <code>getFileContentManager().getType(IStorage storage)</code> instead.
	*/
	@Deprecated
	public static int getType(IStorage storage) {
	return fFileContentManager.getType(storage);
	}

	/**
	* Returns whether the given file or folder with its content should be ignored.
	*
	* This method answers true if the file matches one of the global ignore
	* patterns, or if the file is marked as derived.
	*
	* @param resource the file or folder
	* @return whether the file should be ignored
	*/
	public static boolean isIgnoredHint(IResource resource) {
	if (resource.isDerived()) return true;
	return matchesEnabledIgnore(resource);
	}

	/**
	* Returns whether the given file should be ignored.
	* @param file file to check
	* @return <code>true</code> if this file should be ignored, and <code>false</code> otherwise
	* @deprecated use isIgnoredHint(IResource) instead
	*/
	@Deprecated
	public static boolean isIgnoredHint(IFile file) {
	if (file.isDerived()) return true;
	return matchesEnabledIgnore(file);
	}

	private static boolean matchesEnabledIgnore(IResource resource) {
	WildcardStringMatcher[] matchers = getStringMatchers();
	for (WildcardStringMatcher matcher : matchers) {
	String resourceName = resource.getName();
	if (matcher.isPathPattern()) {
	resourceName = resource.getFullPath().toString();
	}
	if (matcher.match(resourceName)) {
	return true;
	}
	}
	return false;
	}

	/**
	* Returns whether the given file should be ignored.
	* @param file file to check
	* @return <code>true</code> if this file should be ignored, and <code>false</code> otherwise
	* @deprecated use isIgnoredHint instead
	*/
	@Deprecated
	public static boolean isIgnored(IFile file) {
	return matchesEnabledIgnore(file);
	}


	/**
	* Return all known file types.
	*
	* @return all known file types
	* @deprecated Use <code>getFileContentManager().getExtensionMappings()</code> instead.
	*/
	@Deprecated
	public static IFileTypeInfo[] getAllTypes() {
	final IStringMapping [] mappings= fFileContentManager.getExtensionMappings();
	final IFileTypeInfo [] infos= new IFileTypeInfo[mappings.length];
	for (int i = 0; i < infos.length; i++) {
	infos[i]= new StringMappingWrapper(mappings[i]);
	}
	return infos;
	}

	/**
	* Returns the list of global ignores.
	* @return all ignore infos representing globally ignored patterns
	*/
	public synchronized static IIgnoreInfo[] getAllIgnores() {
	// The ignores are cached and when the preferences change the
	// cache is cleared. This makes it faster to lookup without having
	// to re-parse the preferences.
	initializeIgnores();
	IIgnoreInfo[] result = getIgnoreInfo(globalIgnore);
	return result;
	}

	private static void initializeIgnores() {
	if (globalIgnore == null) {
	globalIgnore = new TreeMap<>();
	pluginIgnore = new TreeMap<>();
	ignoreMatchers = null;
	try {
	readIgnoreState();
	} catch (TeamException e) {
	TeamPlugin.log(IStatus.ERROR, Messages.Team_Error_loading_ignore_state_from_disk_1, e);
	}
	initializePluginIgnores(pluginIgnore, globalIgnore);
	}
	}

	private static IIgnoreInfo[] getIgnoreInfo(Map gIgnore) {
	IIgnoreInfo[] result = new IIgnoreInfo[gIgnore.size()];
	Iterator e = gIgnore.entrySet().iterator();
	int i = 0;
	while (e.hasNext() ) {
	Map.Entry entry = (Entry) e.next();
	final String pattern = (String) entry.getKey();
	final boolean enabled = ((Boolean)entry.getValue()).booleanValue();
	result[i++] = new IIgnoreInfo() {
	private String p = pattern;
	private boolean e1 = enabled;
	@Override
	public String getPattern() {
	return p;
	}
	@Override
	public boolean getEnabled() {
	return e1;
	}
	};
	}
	return result;
	}

	private synchronized static WildcardStringMatcher[] getStringMatchers() {
	if (ignoreMatchers==null) {
	IIgnoreInfo[] ignorePatterns = getAllIgnores();
	ArrayList<WildcardStringMatcher> matchers = new ArrayList<>(ignorePatterns.length);
	for (IIgnoreInfo ignorePattern : ignorePatterns) {
	if (ignorePattern.getEnabled()) {
	matchers.add(new WildcardStringMatcher(ignorePattern.getPattern()));
	}
	}
	ignoreMatchers = new WildcardStringMatcher[matchers.size()];
	ignoreMatchers = matchers.toArray(ignoreMatchers);
	}
	return ignoreMatchers;
	}


	/**
	* Set the file type for the give extensions. This
	* will replace the existing file types with this new list.
	*
	* Valid types are:
	* Team.TEXT
	* Team.BINARY
	* Team.UNKNOWN
	*
	* @param extensions the file extensions
	* @param types the file types
	*
	* @deprecated Use <code>getFileContentManager().setExtensionMappings()</code> instead.
	*/
	@Deprecated
	public static void setAllTypes(String[] extensions, int[] types) {
	fFileContentManager.addExtensionMappings(extensions, types);
	}

	/**
	* Add patterns to the list of global ignores.
	*
	* @param patterns Array of patterns to set
	* @param enabled Array of booleans indicating if given pattern is enabled
	*/
	public static void setAllIgnores(String[] patterns, boolean[] enabled) {
	initializeIgnores();
	globalIgnore = new TreeMap<>();
	ignoreMatchers = null;
	for (int i = 0; i < patterns.length; i++) {
	globalIgnore.put(patterns[i], Boolean.valueOf(enabled[i]));
	}
	// Now set into preferences
	StringBuilder buf = new StringBuilder();
	for (Map.Entry entry : globalIgnore.entrySet()) {
	String pattern = (String) entry.getKey();
	Boolean value = (Boolean) entry.getValue();
	boolean isCustom = (!pluginIgnore.containsKey(pattern)) \|\|
	!pluginIgnore.get(pattern).equals(value);
	if (isCustom) {
	buf.append(pattern);
	buf.append(PREF_TEAM_SEPARATOR);
	boolean en = value.booleanValue();
	buf.append(en);
	buf.append(PREF_TEAM_SEPARATOR);
	}
	}
	TeamPlugin.getPlugin().getPluginPreferences().setValue(PREF_TEAM_IGNORES, buf.toString());
	}




	/*
	* IGNORE
	*
	* Reads the ignores currently defined by extensions.
	*/
	private static void initializePluginIgnores(SortedMap<String, Boolean> pIgnore, SortedMap<String, Boolean> gIgnore) {
	TeamPlugin plugin = TeamPlugin.getPlugin();
	if (plugin != null) {
	IExtensionPoint extension = Platform.getExtensionRegistry().getExtensionPoint(TeamPlugin.ID, TeamPlugin.IGNORE_EXTENSION);
	if (extension != null) {
	IExtension[] extensions = extension.getExtensions();
	for (IExtension ext : extensions) {
	IConfigurationElement[] configElements = ext.getConfigurationElements();
	for (IConfigurationElement configElement : configElements) {
	String pattern = configElement.getAttribute("pattern"); //$NON-NLS-1$
	if (pattern != null) {
	String selected = configElement.getAttribute("enabled"); //$NON-NLS-1$
	if (selected == null) {
	// Check for selected because this used to be the field name
	selected = configElement.getAttribute("selected"); //$NON-NLS-1$
	}
	boolean enabled = selected != null
	&& selected.equalsIgnoreCase("true"); //$NON-NLS-1$
	if (!pIgnore.containsKey(pattern)) {
	pIgnore.put(pattern, Boolean.valueOf(enabled));
	} else if (!Boolean.valueOf(enabled).equals(
	pIgnore.get(pattern))) {
	if(Policy.DEBUG){
	TeamPlugin
	.log(IStatus.WARNING,
	NLS.bind(
	Messages.Team_Conflict_occured_for_ignored_resources_pattern,
	new Object[] {
	pattern,
	collectContributingExtentionsToDisplay(
	pattern,
	extensions) }),
	null);
	}
	// if another plug-in already added this pattern
	// change the value only to disabled
	if (!enabled) {
	pIgnore.put(pattern,
	Boolean.FALSE);
	}
	}
	}
	}
	}

	Iterator<String> it = pIgnore.keySet().iterator();
	while (it.hasNext()) {
	String pattern = it.next();
	if (!gIgnore.containsKey(pattern)) {
	gIgnore.put(pattern, pIgnore.get(pattern));
	}
	}
	}
	}
	}

	private static String collectContributingExtentionsToDisplay(
	String patternToFind, IExtension[] extensions) {
	StringBuilder sb = new StringBuilder();
	boolean isFirst = true;
	for (IExtension extension : extensions) {
	IConfigurationElement[] configElements = extension.getConfigurationElements();
	for (IConfigurationElement configElement : configElements) {
	if (patternToFind.equals(configElement.getAttribute("pattern"))) { //$NON-NLS-1$
	if (!isFirst) {
	sb.append(", "); //$NON-NLS-1$
	}
	isFirst = false;
	sb.append(extension.getContributor().getName());
	}
	}
	}
	return sb.toString();
	}

	/*
	* IGNORE
	*
	* Reads global ignore preferences and populates globalIgnore
	*/
	private static void readIgnoreState() throws TeamException {
	if (readBackwardCompatibleIgnoreState()) return;
	Preferences pref = TeamPlugin.getPlugin().getPluginPreferences();
	if (!pref.contains(PREF_TEAM_IGNORES)) return;
	pref.addPropertyChangeListener(event -> {
	// when a property is changed, invalidate our cache so that
	// properties will be recalculated.
	if(event.getProperty().equals(PREF_TEAM_IGNORES))
	globalIgnore = null;
	});
	String prefIgnores = pref.getString(PREF_TEAM_IGNORES);
	StringTokenizer tok = new StringTokenizer(prefIgnores, PREF_TEAM_SEPARATOR);
	String pattern, enabled;
	try {
	while (true) {
	pattern = tok.nextToken();
	if (pattern.length()==0) return;
	enabled = tok.nextToken();
	globalIgnore.put(pattern, Boolean.valueOf(enabled));
	}
	} catch (NoSuchElementException e) {
	return;
	}
	}

	/*
	* For backward compatibility, we still look at if we have .globalIgnores
	*/
	private static boolean readBackwardCompatibleIgnoreState() throws TeamException {
	String GLOBALIGNORE_FILE = ".globalIgnores"; //$NON-NLS-1$
	IPath pluginStateLocation = TeamPlugin.getPlugin().getStateLocation().append(GLOBALIGNORE_FILE);
	File f = pluginStateLocation.toFile();
	if (!f.exists()) return false;
	try {
	try (DataInputStream dis = new DataInputStream(new FileInputStream(f))) {
	int ignoreCount = 0;
	try {
	ignoreCount = dis.readInt();
	} catch (EOFException e) {
	// Ignore the exception, it will occur if there are no ignore
	// patterns stored in the provider state file.
	return false;
	}
	for (int i = 0; i < ignoreCount; i++) {
	String pattern = dis.readUTF();
	boolean enabled = dis.readBoolean();
	globalIgnore.put(pattern, Boolean.valueOf(enabled));
	}
	}
	f.delete();
	} catch (FileNotFoundException e) {
	// not a fatal error, there just happens not to be any state to read
	} catch (IOException ex) {
	throw new TeamException(new Status(IStatus.ERROR, TeamPlugin.ID, 0, Messages.Team_readError, ex));
	}
	return true;
	}
	/**
	* Initialize the registry, restoring its state.
	*
	* This method is called by the plug-in upon startup, clients should not call this method
	*/
	public static void startup() {
	// Register a delta listener that will tell the provider about a project move and meta-file creation
	ResourcesPlugin.getWorkspace().addResourceChangeListener(new TeamResourceChangeListener(), IResourceChangeEvent.POST_CHANGE);
	}

	/**
	* Shut down the registry, persisting its state.
	*
	* This method is called by the plug-in upon shutdown, clients should not call this method
	*/
	public static void shutdown() {
	TeamPlugin.getPlugin().savePluginPreferences();
	}
	/**
	* @deprecated
	* Use {@link org.eclipse.team.core.RepositoryProviderType#getProjectSetCapability()}
	* to obtain an instance of {@link ProjectSetCapability} instead.
	*/
	@Deprecated
	public static IProjectSetSerializer getProjectSetSerializer(String id) {
	TeamPlugin plugin = TeamPlugin.getPlugin();
	if (plugin != null) {
	IExtensionPoint extension = RegistryFactory.getRegistry().getExtensionPoint(TeamPlugin.ID, TeamPlugin.PROJECT_SET_EXTENSION);
	if (extension != null) {
	IExtension[] extensions = extension.getExtensions();
	for (IExtension ext : extensions) {
	IConfigurationElement[] configElements = ext.getConfigurationElements();
	for (IConfigurationElement configElement : configElements) {
	String extensionId = configElement.getAttribute("id"); //$NON-NLS-1$
	if (extensionId != null && extensionId.equals(id)) {
	try {
	return (IProjectSetSerializer) configElement.createExecutableExtension("class"); //$NON-NLS-1$
	} catch (CoreException e) {
	TeamPlugin.log(e);
	return null;
	}
	}
	}
	}
	}
	}
	return null;
	}


	/**
	* Return the default ignore infos
	* (i.e. those that are specified in
	* plugin manifests).
	* @return the default ignore infos.
	* @since 3.0
	*/
	public static IIgnoreInfo[] getDefaultIgnores() {
	SortedMap<String, Boolean> gIgnore = new TreeMap<>();
	SortedMap<String, Boolean> pIgnore = new TreeMap<>();
	initializePluginIgnores(pIgnore, gIgnore);
	return getIgnoreInfo(gIgnore);
	}

	/**
	* TODO: change to file content manager
	* Return the default file type bindings
	* (i.e. those that are specified in
	* plugin manifests).
	* @return the default file type bindings
	* @since 3.0
	* @deprecated Use Team.getFileContentManager().getDefaultExtensionMappings() instead.
	*/
	@Deprecated
	public static IFileTypeInfo[] getDefaultTypes() {
	return asFileTypeInfo(getFileContentManager().getDefaultExtensionMappings());
	}

	private static IFileTypeInfo [] asFileTypeInfo(IStringMapping [] mappings) {
	final IFileTypeInfo [] infos= new IFileTypeInfo[mappings.length];
	for (int i = 0; i < infos.length; i++) {
	infos[i]= new StringMappingWrapper(mappings[i]);
	}
	return infos;
	}

	/**
	* Get the file content manager which implements the API for manipulating the mappings between
	* file names, file extensions and content types.
	*
	* @return an instance of IFileContentManager
	*
	* @see IFileContentManager
	*
	* @since 3.1
	*/
	public static IFileContentManager getFileContentManager() {
	return fFileContentManager;
	}

	/**
	* Creates a storage merger for the given content type.
	* If no storage merger is registered for the given content type <code>null</code> is returned.
	*
	* @param type the type for which to find a storage merger
	* @return a storage merger for the given type, or <code>null</code> if no
	* storage merger has been registered
	*
	* @since 3.4
	*/
	public static IStorageMerger createMerger(IContentType type) {
	return StorageMergerRegistry.getInstance().createStreamMerger(type);
	}

	/**
	* Creates a storage merger for the given file extension.
	* If no storage merger is registered for the file extension <code>null</code> is returned.
	*
	* @param extension the extension for which to find a storage merger
	* @return a stream merger for the given type, or <code>null</code> if no
	* storage merger has been registered
	*
	* @since 3.4
	*/
	public static IStorageMerger createMerger(String extension) {
	return StorageMergerRegistry.getInstance().createStreamMerger(extension);
	}

	/**
	* Creates a storage merger for the given content type.
	* If no storage merger is registered for the given content type <code>null</code> is returned.
	*
	* @param type the type for which to find a storage merger
	* @return a storage merger for the given type, or <code>null</code> if no
	* storage merger has been registered
	* @deprecated Use {@link #createMerger(IContentType)} instead.
	* @since 3.2
	*/
	@Deprecated
	public IStorageMerger createStorageMerger(IContentType type) {
	return createMerger(type);
	}

	/**
	* Creates a storage merger for the given file extension.
	* If no storage merger is registered for the file extension <code>null</code> is returned.
	*
	* @param extension the extension for which to find a storage merger
	* @return a stream merger for the given type, or <code>null</code> if no
	* storage merger has been registered
	* @deprecated Use {@link #createMerger(String)} instead.
	* @since 3.2
	*/
	@Deprecated
	public IStorageMerger createStorageMerger(String extension) {
	return createMerger(extension);
	}

	/**
	* Returns the available bundle importers.
	*
	* <p>
	* <strong>EXPERIMENTAL</strong>. This interface has been added as part of a
	* work in progress. There is no guarantee that this API will work or that
	* it will remain the same. Please do not use this API without consulting
	* with the Team team.
	* </p>
	*
	* @return IBundleImporter[] returns the available bundle importers
	* @since 3.6
	* @noreference This method is not intended to be referenced by clients.
	*/
	public synchronized static IBundleImporter[] getBundleImporters() {
	if (fBundleImporters == null) {
	fBundleImporters = new ArrayList<>();
	IExtensionPoint point = Platform.getExtensionRegistry().getExtensionPoint(TeamPlugin.EXTENSION_POINT_BUNDLE_IMPORTERS);
	if (point != null) {
	IConfigurationElement[] infos = point.getConfigurationElements();
	for (IConfigurationElement info : infos) {
	fBundleImporters.add(new BundleImporterExtension(info));
	}
	}
	}
	return fBundleImporters.toArray(new IBundleImporter[fBundleImporters.size()]);
	}
	}