EDIT

/**

 * Copyright (C) 2007 EDIT

 * European Distributed Institute of Taxonomy

 * http://www.e-taxonomy.eu

 *

 * The contents of this file are subject to the Mozilla Public License Version 1.1

 * See LICENSE.TXT at the top of this package for the full license terms.

 */

package eu.etaxonomy.taxeditor.preference;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.net.URI;

import java.net.URISyntaxException;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Properties;

import java.util.Set;

import java.util.StringTokenizer;

import java.util.UUID;

import org.apache.commons.lang.StringUtils;

import org.eclipse.equinox.internal.p2.ui.model.MetadataRepositoryElement;

import org.eclipse.jface.preference.IPreferenceStore;

import org.eclipse.jface.window.Window;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.ui.PlatformUI;

import eu.etaxonomy.cdm.api.application.ICdmApplicationConfiguration;

import eu.etaxonomy.cdm.api.facade.DerivedUnitFacadeConfigurator;

import eu.etaxonomy.cdm.api.service.IFeatureTreeService;

import eu.etaxonomy.cdm.api.service.IPreferenceService;

import eu.etaxonomy.cdm.api.service.ITermService;

import eu.etaxonomy.cdm.api.service.config.FindTaxaAndNamesConfiguratorImpl;

import eu.etaxonomy.cdm.api.service.config.IFindTaxaAndNamesConfigurator;

import eu.etaxonomy.cdm.common.CdmUtils;

import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;

import eu.etaxonomy.cdm.model.common.ICdmBase;

import eu.etaxonomy.cdm.model.common.IDefinedTerm;

import eu.etaxonomy.cdm.model.common.ISimpleTerm;

import eu.etaxonomy.cdm.model.common.Language;

import eu.etaxonomy.cdm.model.common.MarkerType;

import eu.etaxonomy.cdm.model.common.TermBase;

import eu.etaxonomy.cdm.model.description.FeatureTree;

import eu.etaxonomy.cdm.model.metadata.CdmPreference;

import eu.etaxonomy.cdm.model.metadata.CdmPreference.PrefKey;

import eu.etaxonomy.cdm.model.metadata.PreferencePredicate;

import eu.etaxonomy.cdm.model.metadata.PreferenceSubject;

import eu.etaxonomy.cdm.model.name.NomenclaturalCode;

import eu.etaxonomy.cdm.strategy.match.DefaultMatchStrategy;

import eu.etaxonomy.cdm.strategy.match.IMatchStrategy;

import eu.etaxonomy.cdm.strategy.match.MatchException;

import eu.etaxonomy.cdm.strategy.match.MatchMode;

import eu.etaxonomy.taxeditor.model.AbstractUtility;

import eu.etaxonomy.taxeditor.model.MessagingUtils;

import eu.etaxonomy.taxeditor.model.NomenclaturalCodeHelper;

import eu.etaxonomy.taxeditor.store.CdmStore;

import eu.etaxonomy.taxeditor.store.internal.TaxeditorStorePlugin;

import eu.etaxonomy.taxeditor.ui.dialog.DefaultLanguageDialog;

/**

 * <p>

 * PreferencesUtil class.

 * </p>

 *

 * @author p.ciardelli

 * @author n.hoffmann

 * @created 05.12.2008

 * @version 1.0

 */

public class PreferencesUtil implements IPreferenceKeys {

	/**

	 *

	 */

	public static final String PREFERRED_TERMS_CHANGE = "preferred_terms";

	public static final String P2_REPOSITORIES_DELIM = ",";

	public static final String P2_REPOSITORY_FIELDS_DELIM = ";";

	/**

	 * <p>

	 * getPreferenceStore

	 * </p>

	 *

	 * @return a {@link org.eclipse.jface.preference.IPreferenceStore} object.

	 */

	public static IPreferenceStore getPreferenceStore() {

		return TaxeditorStorePlugin.getDefault().getPreferenceStore();

	}

	/**

	 * <p>

	 * setPreferredNomenclaturalCode

	 * </p>

	 *

	 * @param preferredCode

	 *            a {@link eu.etaxonomy.cdm.model.name.NomenclaturalCode}

	 *            object.

	 */

	public static void setPreferredNomenclaturalCode(

			NomenclaturalCode preferredCode) {

		ICdmApplicationConfiguration controller;

		controller = CdmStore.getCurrentApplicationConfiguration();

		PrefKey key = CdmPreference.NewKey(PreferenceSubject.NewDatabaseInstance(), PreferencePredicate.NomenclaturalCode);

		CdmPreference preference = null;

		if (controller == null){

			return;

		}

		if (preferredCode == null){

			preference = controller.getPreferenceService().find(key);

			if (preference == null){

				return;

			} else{

				int index = StringUtils.lastIndexOf(preference.getValue(), ".");

				UUID uuid = UUID.fromString(preference.getValue().substring(index +1, preference.getValue().length()));

				preferredCode = NomenclaturalCode.getByUuid(uuid);

			}

		} else{

			preference = CdmPreference.NewInstance(PreferenceSubject.NewDatabaseInstance(), PreferencePredicate.NomenclaturalCode, preferredCode.getKey());

			controller.getPreferenceService().set(preference);

		}

		getPreferenceStore().setValue(PREFERRED_NOMENCLATURAL_CODE_KEY,

	    			getPreferenceKey(preferredCode));

	}

	public static NomenclaturalCode getPreferredNomenclaturalCode(){

		return getPreferredNomenclaturalCode(false);

	}

	/**

	 * <p>

	 * getPreferredNomenclaturalCode

	 * </p>

	 *

	 * @return a {@link eu.etaxonomy.cdm.model.name.NomenclaturalCode} object.

	 */

	public static NomenclaturalCode getPreferredNomenclaturalCode(boolean preConnected) {

		ICdmApplicationConfiguration controller;

		CdmPreference pref = null;

		if (!preConnected){

			try{

				controller = CdmStore.getCurrentApplicationConfiguration();

				PrefKey key = CdmPreference.NewKey(PreferenceSubject.NewDatabaseInstance(), PreferencePredicate.NomenclaturalCode);

			    pref = controller.getPreferenceService().find(key);

			}catch(Exception e){

				e.printStackTrace();

			}

		}

	    String preferredCode;

	    if(pref == null){

	    	preferredCode = getPreferenceStore().getString(

					PREFERRED_NOMENCLATURAL_CODE_KEY);

	    }else{

	    	preferredCode = pref.getValue();

	    }

		for (NomenclaturalCode code : NomenclaturalCodeHelper.getAllCodes()) {

//			String preferredCode = getPreferenceStore().getString(

//					PREFERRED_NOMENCLATURAL_CODE_KEY);

			if (getPreferenceKey(code).equals(preferredCode)) {

				return code;

			}

		}

		return null;

	}

	public static String getPreferredDefaultLangugae(){

	    String preferredLanguage = getPreferenceStore().getString(DEFAULT_LANGUAGE_EDITOR);

	    if(StringUtils.isNotEmpty(preferredLanguage) && StringUtils.isNotBlank(preferredLanguage)){

	        return preferredLanguage;

	    }

	    return null;

	}

	/**

	 * Get the match strategy for the given class that was stored in preferences

	 * or the default strategy if it was not stored in preferences

	 *

	 * @param clazz

	 *            a {@link java.lang.Class} object.

	 * @return a {@link eu.etaxonomy.cdm.strategy.match.IMatchStrategy} object.

	 */

	public static IMatchStrategy getMatchStrategy(Class clazz) {

		String className = clazz.getName();

		if (getPreferenceStore().getBoolean(MATCH_STRATEGY_PREFIX + className)) {

			IMatchStrategy matchStrategy = getDefaultMatchStrategy(clazz);

			for (String fieldName : matchStrategy.getMatchFieldPropertyNames()) {

				String matchModeName = getPreferenceStore().getString(

						getMatchStrategyFieldName(className, fieldName));

				MatchMode matchMode = MatchMode.valueOf(matchModeName);

				try {

					matchStrategy.setMatchMode(fieldName, matchMode);

				} catch (MatchException e) {

					MessagingUtils.error(PreferencesUtil.class, e);

					throw new RuntimeException(e);

				}

			}

			return matchStrategy;

		}

		return getDefaultMatchStrategy(clazz);

	}

	/**

	 * Stores a matchStrategy into the preference store.

	 *

	 * @param matchStrategy

	 *            a {@link eu.etaxonomy.cdm.strategy.match.IMatchStrategy}

	 *            object.

	 */

	public static void setMatchStrategy(IMatchStrategy matchStrategy) {

		String className = matchStrategy.getMatchClass().getName();

		getPreferenceStore().setValue(MATCH_STRATEGY_PREFIX + className, true);

		Set<String> matchFields = matchStrategy.getMatchFieldPropertyNames();

		for (String fieldName : matchFields) {

			getPreferenceStore().setValue(

					getMatchStrategyFieldName(className, fieldName),

					matchStrategy.getMatchMode(fieldName).name());

		}

	}

	/**

	 * Helper method to create the preference property for a match field.

	 *

	 * @param className

	 * @param fieldName

	 * @return

	 */

	private static String getMatchStrategyFieldName(String className,

			String fieldName) {

		return MATCH_STRATEGY_PREFIX + className + "." + fieldName;

	}

	/**

	 * Returns the default match strategy for a given class.

	 *

	 * @param clazz

	 *            a {@link java.lang.Class} object.

	 * @return a {@link eu.etaxonomy.cdm.strategy.match.IMatchStrategy} object.

	 */

	public static IMatchStrategy getDefaultMatchStrategy(Class clazz) {

		return DefaultMatchStrategy.NewInstance(clazz);

	}

	/**

	 * <p>

	 * getDateFormatPattern

	 * </p>

	 *

	 * @return a {@link java.lang.String} object.

	 */

	public static String getDateFormatPattern() {

		// TODO make this configurable in properties

		String pattern = "Y-M-d H:m";

		return pattern;

	}

	/**

	 * <p>

	 * addTermToPreferredTerms

	 * </p>

	 *

	 * @param term

	 *            a T object.

	 * @param <T>

	 *            a T object.

	 */

	public static <T extends TermBase> void addTermToPreferredTerms(T term) {

		// VocabularyEnum vocabulary =

		// VocabularyEnum.getVocabularyEnum(term.getClass());

		//

		// getPreferenceStore().setValue(getPreferenceKey(term),

		// VocabularyStore.getTermVocabulary(vocabulary).getTerms().contains(term));

		//

		// firePreferencesChanged(term.getClass());

	}

	/**

	 * Construct a unique key using the CdmBase object's uuid

	 *

	 * @param cdmBase

	 * @return

	 */

	private static String getPreferenceKey(ICdmBase cdmBase) {

		cdmBase = HibernateProxyHelper.deproxy(cdmBase);

		String key = cdmBase.getClass().getName().concat(".")

				.concat(cdmBase.getUuid().toString());

		if (key.contains("javassist")) {

			MessagingUtils.info("proxy");

		}

		return key;

	}

	/**

	 * Construct a unique key using the CdmBase object's uuid

	 *

	 * @param cdmBase

	 * @return

	 */

	public static String getPreferenceKey(ISimpleTerm simpleTerm) {

		simpleTerm = HibernateProxyHelper.deproxy(simpleTerm);

		String key = simpleTerm.getClass().getName().concat(".")

				.concat(simpleTerm.getUuid().toString());

		if (key.contains("javassist")) {

			MessagingUtils.warn(PreferencesUtil.class,

					"Trying to persist a preference based on a proxy class.");

		}

		return key;

	}

	/**

	 * Construct a unique key using the CdmBase object's uuid

	 *

	 * @param cdmBase

	 * @return

	 */

	public static String getPreferenceKey(IDefinedTerm definedTerm) {

		definedTerm = HibernateProxyHelper.deproxy(definedTerm);

		String key = definedTerm.getClass().getName().concat(".")

				.concat(definedTerm.getUuid().toString());

		if (key.contains("javassist")) {

			MessagingUtils.warn(PreferencesUtil.class,

					"Trying to persist a preference based on a proxy class.");

		}

		return key;

	}

	/**

	 * Retrieves search preferences from the preference store

	 *

	 * @return an {@link ITaxonServiceConfigurator} to pass to search methods

	 */

	public static IFindTaxaAndNamesConfigurator getSearchConfigurator() {

		IFindTaxaAndNamesConfigurator configurator = initializeSearchConfigurator();

		configurator.setDoTaxa(getPreferenceStore().getBoolean(

				TAXON_SERVICE_CONFIGURATOR_TAXA));

		configurator.setDoSynonyms(getPreferenceStore().getBoolean(

				TAXON_SERVICE_CONFIGURATOR_SYNONYMS));

		configurator.setDoNamesWithoutTaxa(getPreferenceStore().getBoolean(

				TAXON_SERVICE_CONFIGURATOR_NAMES));

		configurator.setDoTaxaByCommonNames(getPreferenceStore().getBoolean(

				TAXON_SERVICE_CONFIGURATOR_COMMON_NAMES));

		//configurator.setMatchMode(eu.etaxonomy.cdm.persistence.query.MatchMode.valueOf(getPreferenceStore().getString(TAXON_SERVICE_CONFIGURATOR_MATCH_MODE)));

		return configurator;

	}

	/**

	 * create new preferences, setting all search options to true

	 *

	 * @return a

	 *         {@link eu.etaxonomy.cdm.api.service.config.ITaxonServiceConfigurator}

	 *         object.

	 */

	public static IFindTaxaAndNamesConfigurator initializeSearchConfigurator() {

		IFindTaxaAndNamesConfigurator configurator = new FindTaxaAndNamesConfiguratorImpl();

		configurator.setDoTaxa(true);

		configurator.setDoSynonyms(true);

		configurator.setDoNamesWithoutTaxa(true);

		configurator.setDoTaxaByCommonNames(true);

		configurator.setTaxonPropertyPath(Arrays.asList("$", "titleCache",

				"name", "name.$", "relationsFromThisTaxon.$"));

		configurator.setSynonymPropertyPath(Arrays.asList("$", "titleCache",

				"name", "name.$", "synonymRelations.relatedTo.*"));

		// DEFAULT VALUES

		// match mode is a simple like, actually all other match modes are kind

		// of bogus

		configurator

				.setMatchMode(eu.etaxonomy.cdm.persistence.query.MatchMode.ANYWHERE);

		// we set page number and size here as this should always be unlimited

		configurator.setPageNumber(0);

		// TODO currently limit results to 10000

		configurator.setPageSize(10000);

		return configurator;

	}

	/**

	 * Store search preferences

	 *

	 * @param configurator

	 *            a

	 *            {@link eu.etaxonomy.cdm.api.service.config.ITaxonServiceConfigurator}

	 *            object.

	 */

	public static void setSearchConfigurator(

			IFindTaxaAndNamesConfigurator configurator) {

		getPreferenceStore().setValue(TAXON_SERVICE_CONFIGURATOR_TAXA,

				configurator.isDoTaxa());

		getPreferenceStore().setValue(TAXON_SERVICE_CONFIGURATOR_SYNONYMS,

				configurator.isDoSynonyms());

		getPreferenceStore().setValue(TAXON_SERVICE_CONFIGURATOR_NAMES,

				configurator.isDoNamesWithoutTaxa());

		getPreferenceStore().setValue(TAXON_SERVICE_CONFIGURATOR_COMMON_NAMES,

				configurator.isDoTaxaByCommonNames());

	}

	/**

	 * <p>

	 * firePreferencesChanged

	 * </p>

	 *

	 * @param clazz

	 *            a {@link java.lang.Class} object.

	 */

	public static void firePreferencesChanged(Class clazz) {

		getPreferenceStore().firePropertyChangeEvent(PREFERRED_TERMS_CHANGE,

				null, clazz);

	}

	/**

	 * Set default values for preferences

	 */

	public static void setDefaults() {

		getPreferenceStore().setDefault(TAXON_SERVICE_CONFIGURATOR_TAXA, true);

		getPreferenceStore().setDefault(TAXON_SERVICE_CONFIGURATOR_SYNONYMS,

				true);

		getPreferenceStore().setDefault(EDIT_MAP_SERVICE_ACCES_POINT,

				"http://edit.africamuseum.be/edit_wp5/v1.2/rest_gen.php");

		//FIXME : changed default for SHOULD_CONNECT_AT_STARTUP to false (ticket 3828) until resolution

		getPreferenceStore().setDefault(SHOULD_CONNECT_AT_STARTUP, false);

		getPreferenceStore().setDefault(OPENURL_ACCESS_POINT,

				"http://www.biodiversitylibrary.org/openurl");

		getPreferenceStore().setDefault(OPENURL_IMAGE_MAX_WIDTH, "1000");

		getPreferenceStore().setDefault(OPENURL_IMAGE_MAX_HEIGHT, "1000");

		getPreferenceStore().setDefault(IPreferenceKeys.DISTRIBUTION_AREA_PREFRENCES_ACTIVE, false);

		getPreferenceStore().setDefault(CHECKLIST_ID_IN_VOCABULARY, true);

	}

	/**

	 * <p>

	 * checkNomenclaturalCode

	 * </p>

	 */

	public static void checkNomenclaturalCode() {

		// First time Editor is opened, no nomenclatural code has been set

		if (PreferencesUtil.getPreferredNomenclaturalCode(true) == null) {

			PreferencesUtil.setPreferredNomenclaturalCode(NomenclaturalCode.ICNAFP);

			/*

			StoreUtil.info("No nomencatural code set.");

			Shell shell = StoreUtil.getShell();

		 Query user re: preferred nom. code

			Dialog dialog = new InitNomenclaturalCodePrefDialog(shell);

			dialog.open();

			// Short message confirming user's choice

			NomenclaturalCode code = PreferencesUtil

					.getPreferredNomenclaturalCode();

			MessageDialog

					.openInformation(

							shell,

							"Nomenclatural code set",

							"The following has been set as your preferred nomenclatural code:\n\n\t"

									+ NomenclaturalCodeHelper

											.getDescription(code)

									+ "\n\nYou can change the nomenclatural code at any time in the \"Preferences\" menu.");*/

		}

	}

	public static void checkDefaultLanguage(){

	    if(PreferencesUtil.getPreferredDefaultLangugae() == null){

	       Shell shell = AbstractUtility.getShell();

	       int open = new DefaultLanguageDialog(shell).open();

	       if(open == Window.OK){

	           PlatformUI.getWorkbench().restart();

	       }

	    }else{

	        //TODO:In case of a reinstall, the config.ini will be overwritten

	        //     here you create config.ini with the stored key from preferences

	    }

	}

	/**

	 * <p>

	 * getMapServiceAccessPoint

	 * </p>

	 *

	 * @return a {@link java.lang.String} object.

	 */

	public static String getMapServiceAccessPoint() {

		return getPreferenceStore().getString(EDIT_MAP_SERVICE_ACCES_POINT);

	}

	/**

	 * <p>

	 * shouldConnectAtStartUp

	 * </p>

	 *

	 * @return a boolean.

	 */

	public static boolean shouldConnectAtStartUp() {

		//FIXME :  force SHOULD_CONNECT_AT_STARTUP to false (ticket 3828) until resolution

		//return getPreferenceStore().getBoolean(SHOULD_CONNECT_AT_STARTUP);

		return false;

	}

	/**

	 * <p>

	 * getDefaultFeatureTreeForTextualDescription

	 * </p>

	 *

	 * @return a {@link eu.etaxonomy.cdm.model.description.FeatureTree} object.

	 */

	public static FeatureTree getDefaultFeatureTreeForTextualDescription() {

		String uuidString = getPreferenceStore().getString(

				FEATURE_TREE_DEFAULT_TEXT);

		return CdmUtils.isEmpty(uuidString) ? null : CdmStore.getService(

				IFeatureTreeService.class).load(UUID.fromString(uuidString));

	}

	/**

	 * <p>

	 * getDefaultFeatureTreeForStructuredDescription

	 * </p>

	 *

	 * @return a {@link eu.etaxonomy.cdm.model.description.FeatureTree} object.

	 */

	public static FeatureTree getDefaultFeatureTreeForStructuredDescription() {

		String uuidString = getPreferenceStore().getString(

				FEATURE_TREE_DEFAULT_STRUCTURE);

		return CdmUtils.isEmpty(uuidString) ? null : CdmStore.getService(

				IFeatureTreeService.class).load(UUID.fromString(uuidString));

	}

	/**

	 * <p>

	 * setSortRanksHierarchichally

	 * </p>

	 *

	 * @param selection

	 *            a boolean.

	 */

	public static void setSortRanksHierarchichally(boolean selection) {

		getPreferenceStore().setValue(SORT_RANKS_HIERARCHICHALLY, selection);

	}

	/**

	 * <p>

	 * getSortRanksHierarchichally

	 * </p>

	 *

	 * @return a boolean.

	 */

	public static boolean getSortRanksHierarchichally() {

		return getPreferenceStore().getBoolean(SORT_RANKS_HIERARCHICHALLY);

	}

	public static boolean isMultilanguageTextEditingCapability() {

		return getPreferenceStore().getBoolean(

				MULTILANGUAGE_TEXT_EDITING_CAPABILITY);

	}

	public static Language getGlobalLanguage() {

		String languageUuidString = getPreferenceStore().getString(

				GLOBAL_LANGUAGE_UUID);

		if(!CdmStore.isActive()) {

            MessagingUtils.noDataSourceWarningDialog(languageUuidString);

            return null;

        }

		if (CdmUtils.isBlank(languageUuidString)) {

			return Language.getDefaultLanguage();

		}

		UUID languageUuid = UUID.fromString(languageUuidString);

		return (Language) CdmStore.getService(ITermService.class).load(

				languageUuid);

	}

	public static void setGlobalLanguage(Language language) {

	    if(language != null) {

	        getPreferenceStore().setValue(GLOBAL_LANGUAGE_UUID,language.getUuid().toString());

	        CdmStore.setDefaultLanguage(language);

	    }

	}

	/**

	 * @return

	 */

	public static Map<MarkerType, Boolean> getEditMarkerTypePreferences() {

		List<MarkerType> markerTypes = CdmStore.getTermManager()

				.getPreferredTerms(MarkerType.class);

		Map<MarkerType, Boolean> result = new HashMap<MarkerType, Boolean>();

		for (MarkerType markerType : markerTypes) {

			String name = getMarkerTypeEditingPreferenceKey(markerType);

			Boolean value = getPreferenceStore().getBoolean(name);

			result.put(markerType, value);

		}

		return result;

	}

	/**

	 * @param markerTypeEditingMap

	 */

	public static void setEditMarkerTypePreferences(

			Map<MarkerType, Boolean> markerTypeEditingMap) {

		for (MarkerType markerType : markerTypeEditingMap.keySet()) {

			String name = getMarkerTypeEditingPreferenceKey(markerType);

			getPreferenceStore().setValue(name,

					markerTypeEditingMap.get(markerType));

		}

	}

	private static String getMarkerTypeEditingPreferenceKey(

			MarkerType markerType) {

		markerType = HibernateProxyHelper.deproxy(markerType);

		return markerType.getClass().getName() + EDIT_MARKER_TYPE_PREFIX;

	}

	/**

	 * <p>

	 * setEditMarkerTypePreference

	 * </p>

	 *

	 * @param input

	 *            a {@link org.eclipse.ui.IEditorInput} object.

	 * @param markerType

	 *            a {@link eu.etaxonomy.cdm.model.common.MarkerType} object.

	 * @param edit

	 *            a boolean.

	 */

	public static void setEditMarkerTypePreference(MarkerType markerType,

			boolean edit) {

		getPreferenceStore().setValue(

				getMarkerTypeEditingPreferenceKey(markerType), edit);

	}

	/**

	 * @return

	 */

	public static DerivedUnitFacadeConfigurator getDerivedUnitConfigurator() {

		DerivedUnitFacadeConfigurator configurator = DerivedUnitFacadeConfigurator

				.NewInstance();

		configurator.setMoveDerivedUnitMediaToGallery(true);

		configurator.setMoveFieldObjectMediaToGallery(true);

		return configurator;

	}

	/**

	 * This method will write language properties to the config.ini located in the configuration folder

	 * of the Taxonomic Ediitor. <b>This method is only used to set the default language for Taxonomic Editor.</b>

	 *

	 * @param setLanguage 0 is for german and 1 for english.

	 * @throws IOException

	 */

    public void writePropertyToConfigFile(int setLanguage) throws IOException {

        File file = org.eclipse.core.runtime.preferences.ConfigurationScope.INSTANCE.getLocation().toFile();

        //give warning to user if the directory has no write access

        if(file == null){

            throw new IOException();

        }

        Properties properties = load(file.getAbsolutePath()+"/config.ini");

        switch(setLanguage){

        case 0:

            properties.setProperty("osgi.nl", "de");

            PreferencesUtil.getPreferenceStore().setValue(IPreferenceKeys.DEFAULT_LANGUAGE_EDITOR, "de");

            break;

        case 1:

            properties.setProperty("osgi.nl", "en");

            PreferencesUtil.getPreferenceStore().setValue(IPreferenceKeys.DEFAULT_LANGUAGE_EDITOR, "en");

            break;

        default:

            break;

        }

        save(file+"/config.ini", properties);

    }

    /**

     * This method loads a property from a given file and returns it.

     *

     * @param filename

     * @return

     * @throws IOException

     */

    private Properties load(String filename) throws IOException {

        FileInputStream in = new FileInputStream(filename);

        Properties prop = new Properties();

        prop.load(in);

        in.close();

        return prop;

    }

    /**

     * This method saves a property to the specified file.

     *

     * @param filename

     * @param properties

     * @throws IOException

     */

    private void save(String filename, Properties properties) throws IOException{

        FileOutputStream fos =  new FileOutputStream(filename);

        properties.store(fos, "");

        fos.close();

    }

    /**

     * Saves a list of P2 Metadata Repositories as string with specified delimiters

     *

     * @param p2Repos

     */

    public static void setP2Repositories(List<MetadataRepositoryElement> p2Repos) {

        StringBuilder sb = new StringBuilder();

        for(MetadataRepositoryElement p2Repo : p2Repos) {

            sb.append(P2_REPOSITORIES_DELIM);

            if(p2Repo.getName() == null || p2Repo.getName().isEmpty()) {

                sb.append("-");

            } else {

                sb.append(p2Repo.getName());

            }

            sb.append(P2_REPOSITORY_FIELDS_DELIM);

            sb.append(p2Repo.getLocation().toString());

            sb.append(P2_REPOSITORY_FIELDS_DELIM);

            sb.append(String.valueOf(p2Repo.isEnabled()));

        }

        getPreferenceStore().setValue(P2_REPOSITORY_LIST, sb.toString());

    }

    /**

     * Retrieves a list of previously saved P2 repositories

     *

     * @return

     */

    public static List<MetadataRepositoryElement> getP2Repositories() {

        List<MetadataRepositoryElement> p2Repos = new ArrayList<MetadataRepositoryElement>();

        String p2ReposPref =  getPreferenceStore().getString(P2_REPOSITORY_LIST);

        if(p2ReposPref != null && !p2ReposPref.isEmpty()) {

            StringTokenizer p2ReposPrefST = new StringTokenizer(p2ReposPref,P2_REPOSITORIES_DELIM);

            while(p2ReposPrefST.hasMoreTokens()) {

                String p2RepoStr = p2ReposPrefST.nextToken();

                StringTokenizer p2ReposStrST = new StringTokenizer(p2RepoStr,P2_REPOSITORY_FIELDS_DELIM);

                if(p2ReposStrST.countTokens()==3) {

                    String nickname = p2ReposStrST.nextToken();

                    URI uri = null;

                    try {

                        uri = new URI(p2ReposStrST.nextToken());

                    } catch (URISyntaxException e) {

                        continue;

                    }

                    boolean enabled = Boolean.parseBoolean(p2ReposStrST.nextToken());

                    MetadataRepositoryElement mre = new MetadataRepositoryElement(null, uri, true);

                    mre.setNickname(nickname);

                    mre.setEnabled(enabled);

                    p2Repos.add(mre);

                }

            }

        }

        return p2Repos;

    }

    /**

     * enables/disables nested composite. <br>

     *

     * @param ctrl - Composite to be en-/disabeld

     * @param enabled - boolean

     */

    public static void recursiveSetEnabled(Control ctrl, boolean enabled) {

        if (ctrl instanceof Composite) {

            Composite comp = (Composite) ctrl;

            for (Control c : comp.getChildren()) {

                recursiveSetEnabled(c, enabled);

            }

        } else {

            ctrl.setEnabled(enabled);

        }

    }

    /**

	 * <p>

	 * getSortRanksNaturally

	 * </p>

	 *

	 * @return a boolean.

	 */

	public static boolean getSortNodesNaturally() {

		return getPreferenceStore().getBoolean(SORT_NODES_NATURALLY);

	}

	/**

	 * <p>

	 * setSortRanksNaturally

	 * </p>

	 *

	 * @param selection

	 *            a boolean.

	 */

	public static void setSortNodesNaturally(boolean selection) {

		getPreferenceStore().setValue(SORT_NODES_NATURALLY, selection);

	}

	/**

	 * <p>

	 * getSortRanksNaturally

	 * </p>

	 *

	 * @return a boolean.

	 */

	public static boolean getSortNodesStrictlyAlphabetically() {

		return getPreferenceStore().getBoolean(SORT_NODES_ALPHABETICALLY);

	}

	/**

	 * <p>

	 * setSortRanksNaturally

	 * </p>

	 *

	 * @param selection

	 *            a boolean.

	 */

	public static void setSortNodesStrictlyAlphabetically(boolean selection) {

		getPreferenceStore().setValue(SORT_NODES_ALPHABETICALLY, selection);

	}

	/**

	 * <p>

	 * setStoreNavigatorState

	 * </p>

	 *

	 * @param selection

	 *            a boolean.

	 */

	public static boolean isStoreNavigatorState() {

		return getPreferenceStore().getBoolean(RESTORE_NAVIGATOR_STATE);

	}

	/**

	 * <p>

	 * setStoreNavigatorState

	 * </p>

	 *

	 * @param selection

	 *            a boolean.

	 */

	public static void setStoreNavigatorState(boolean selection) {

		getPreferenceStore().setValue(RESTORE_NAVIGATOR_STATE, selection);

	}

    /**

     * @return

     */

    public static boolean isShowUpWidgetIsDisposedMessages() {

       return getPreferenceStore().getBoolean(IS_SHOW_UP_WIDGET_IS_DISPOSED);

    }

    public static void setShowUpWidgetIsDisposedMessages(boolean selection) {

        getPreferenceStore().setValue(IS_SHOW_UP_WIDGET_IS_DISPOSED, selection);

    }

    /**

     * @return

     */

    public static boolean isShowIdInVocabularyInChecklistEditor() {

       return getPreferenceStore().getBoolean(IPreferenceKeys.CHECKLIST_ID_IN_VOCABULARY);

    }

    public static void setShowIdInVocabularyInChecklistEditor(boolean selection) {

        getPreferenceStore().setValue(CHECKLIST_ID_IN_VOCABULARY, selection);

    }

    /**

     * @return

     */

    public static boolean isShowRankInChecklistEditor() {

        return getPreferenceStore().getBoolean(IPreferenceKeys.CHECKLIST_SHOW_RANK);

    }

    public static void setShowRankInChecklistEditor(boolean selection) {

        getPreferenceStore().setValue(CHECKLIST_SHOW_RANK, selection);

    }

}