jpa/plugins/org.eclipse.jpt.db/src/org/eclipse/jpt/db/internal/DTPDatabaseWrapper.java - dali/webtools.dali - Git at Google

 /*******************************************************************************
  * Copyright (c) 2006, 2009 Oracle. 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:
  *     Oracle - initial API and implementation
  ******************************************************************************/
 package org.eclipse.jpt.db.internal;

 import com.ibm.icu.text.Collator;
 import java.util.Iterator;
 import java.util.List;

 import org.eclipse.datatools.connectivity.sqm.core.definition.DatabaseDefinition;
 import org.eclipse.datatools.connectivity.sqm.internal.core.RDBCorePlugin;
 import org.eclipse.jpt.db.Catalog;
 import org.eclipse.jpt.db.Database;
 import org.eclipse.jpt.db.DatabaseObject;
 import org.eclipse.jpt.db.internal.vendor.Vendor;
 import org.eclipse.jpt.db.internal.vendor.VendorRepository;
 import org.eclipse.jpt.utility.internal.CollectionTools;
 import org.eclipse.jpt.utility.internal.iterators.ArrayIterator;
 import org.eclipse.jpt.utility.internal.iterators.TransformationIterator;

 /**
  * Wrap a DTP Database.
  *
  * Catalogs vs. Schemata:
  * Typically, if a DTP database does not support "catalogs",
  * o.e.datatools.modelbase.sql.schema.Database#getCatalogs() will return a
  * single catalog without a name (actually, it's an empty string). This catalog
  * will contain all the database's schemata. We try to ignore this catalog and
  * return the schemata from the database directly.
  *
  * Catalog Note 1:
  * As of Jan 2009, the DTP MySQL driver is not consistent with this pattern.
  * A DTP MySQL database has *no* catalogs; it holds a single schema
  * directly, and that schema has the same name as the database. See bug 249013.
  *
  * Catalog Note 2:
  * As of Jan 2009, the PostgreSQL JDBC driver complicates this pattern a bit.
  * Even though PostgreSQL does not support "catalogs", its JDBC driver
  * returns a single catalog that has the same name as the database specified
  * in the JDBC connection URL. The DTP PostgreSQL driver simply replicates this
  * behavior. Unfortunately, this catalog can be unnamed; i.e. its name is an
  * empty string....
  *
  * (Yet Another) Note:
  * We use "name" when dealing with the unmodified name of a database object
  * as supplied by the database itself (i.e. it is not delimited and it is always
  * case-sensitive).
  * We use "identifier" when dealing with a string representation of a database
  * object name (i.e. it may be delimited and, depending on the vendor, it may
  * be case-insensitive).
  */
 final class DTPDatabaseWrapper
 	extends DTPSchemaContainerWrapper
 	implements Database
 {
 	// the wrapped DTP database
 	private final org.eclipse.datatools.modelbase.sql.schema.Database dtpDatabase;

 	// vendor-specific behavior
 	private final Vendor vendor;

 	// lazy-initialized, sorted
 	private DTPCatalogWrapper[] catalogs;


 	// ********** constructor **********

 	DTPDatabaseWrapper(DTPConnectionProfileWrapper connectionProfile, org.eclipse.datatools.modelbase.sql.schema.Database dtpDatabase) {
 		super(connectionProfile, dtpDatabase);
 		this.dtpDatabase = dtpDatabase;
 		this.vendor = VendorRepository.instance().getVendor(this.getVendorName());
 	}


 	// ********** DTPWrapper implementation **********

 	/* TODO
 	 * We might want to listen to the "virtual" catalog; but that's probably
 	 * not necessary since there is no easy way for the user to refresh it
 	 * (i.e. it is not displayed in the DTP UI).
 	 */
 	@Override
 	synchronized void catalogObjectChanged() {
 		super.catalogObjectChanged();
 		this.getConnectionProfile().databaseChanged(this);
 	}

 	@Override
 	public DTPDatabaseWrapper getDatabase() {
 		return this;
 	}


 	// ********** DTPSchemaContainerWrapper implementation **********

 	@Override
 	List<org.eclipse.datatools.modelbase.sql.schema.Schema> getDTPSchemata() {
 		return this.vendor.getSchemas(this.dtpDatabase);
 	}

 	@Override
 	DTPSchemaWrapper getSchema(org.eclipse.datatools.modelbase.sql.schema.Schema dtpSchema) {
 		return this.getSchema_(dtpSchema);
 	}

 	DTPSchemaWrapper getSchemaFromCatalogs(org.eclipse.datatools.modelbase.sql.schema.Schema dtpSchema) {
 		return this.getCatalog(dtpSchema.getCatalog()).getSchema_(dtpSchema);
 	}

 	/**
 	 * this is only called from a schema when the database is the schema
 	 * container, so we know we don't have any catalogs
 	 */
 	@Override
 	DTPTableWrapper getTable(org.eclipse.datatools.modelbase.sql.tables.Table dtpTable) {
 		return this.getTable_(dtpTable);
 	}

 	/**
 	 * this is only called from a catalog, so we know we have catalogs;
 	 * i.e. the search has to descend through catalogs, then to schemata
 	 */
 	DTPTableWrapper getTableFromCatalogs(org.eclipse.datatools.modelbase.sql.tables.Table dtpTable) {
 		return this.getCatalog(dtpTable.getSchema().getCatalog()).getTable_(dtpTable);
 	}

 	/**
 	 * this is only called from a schema when the database is the schema
 	 * container, so we know we don't have any catalogs
 	 */
 	@Override
 	DTPColumnWrapper getColumn(org.eclipse.datatools.modelbase.sql.tables.Column dtpColumn) {
 		return this.getColumn_(dtpColumn);
 	}

 	/**
 	 * this is only called from a catalog, so we know we have catalogs;
 	 * i.e. the search has to descend through catalogs, then to schemata
 	 */
 	DTPColumnWrapper getColumnFromCatalogs(org.eclipse.datatools.modelbase.sql.tables.Column dtpColumn) {
 		return this.getCatalog(dtpColumn.getTable().getSchema().getCatalog()).getColumn_(dtpColumn);
 	}


 	// ********** DatabaseObject implementation **********

 	public String getName() {
 		return this.dtpDatabase.getName();
 	}


 	// ********** Database implementation **********

 	public String getVendorName() {
 		return this.dtpDatabase.getVendor();
 	}

 	public String getVersion() {
 		return this.dtpDatabase.getVersion();
 	}

 	// override to make method public since it's in the Database interface
 	@Override
 	public <T extends DatabaseObject> T selectDatabaseObjectForIdentifier(T[] databaseObjects, String identifier) {
 		return super.selectDatabaseObjectForIdentifier(databaseObjects, identifier);
 	}

 	// ***** catalogs

 	public boolean supportsCatalogs() {
 		return this.vendor.supportsCatalogs(this.dtpDatabase);
 	}

 	public Iterator<Catalog> catalogs() {
 		return new ArrayIterator<Catalog>(this.getCatalogs());
 	}

 	private Iterator<DTPCatalogWrapper> catalogWrappers() {
 		return new ArrayIterator<DTPCatalogWrapper>(this.getCatalogs());
 	}

 	private synchronized DTPCatalogWrapper[] getCatalogs() {
 		if (this.catalogs == null) {
 			this.catalogs = this.buildCatalogs();
 		}
 		return this.catalogs;
 	}

 	private DTPCatalogWrapper[] buildCatalogs() {
 		List<org.eclipse.datatools.modelbase.sql.schema.Catalog> dtpCatalogs = this.getDTPCatalogs();
 		DTPCatalogWrapper[] result = new DTPCatalogWrapper[dtpCatalogs.size()];
 		for (int i = result.length; i-- > 0;) {
 			result[i] = new DTPCatalogWrapper(this, dtpCatalogs.get(i));
 		}
 		return CollectionTools.sort(result);
 	}

 	private List<org.eclipse.datatools.modelbase.sql.schema.Catalog> getDTPCatalogs() {
 		return this.vendor.getCatalogs(this.dtpDatabase);
 	}

 	public int catalogsSize() {
 		return this.getCatalogs().length;
 	}

 	/**
 	 * return the catalog for the specified DTP catalog
 	 */
 	DTPCatalogWrapper getCatalog(org.eclipse.datatools.modelbase.sql.schema.Catalog dtpCatalog) {
 		for (DTPCatalogWrapper catalog : this.getCatalogs()) {
 			if (catalog.wraps(dtpCatalog)) {
 				return catalog;
 			}
 		}
 		throw new IllegalArgumentException("invalid DTP catalog: " + dtpCatalog);  //$NON-NLS-1$
 	}

 	public DTPCatalogWrapper getCatalogNamed(String name) {
 		return this.selectDatabaseObjectNamed(this.getCatalogs(), name);
 	}

 	public Iterator<String> sortedCatalogIdentifiers() {
 		// the catalogs are already sorted
 		return new TransformationIterator<DTPCatalogWrapper, String>(this.catalogWrappers()) {
 			@Override
 			protected String transform(DTPCatalogWrapper next) {
 				 return next.getIdentifier();
 			}
 		};
 	}

 	public DTPCatalogWrapper getCatalogForIdentifier(String identifier) {
 		return this.selectDatabaseObjectForIdentifier(this.getCatalogs(), identifier);
 	}

 	public synchronized DTPCatalogWrapper getDefaultCatalog() {
 		return this.getCatalogForIdentifiers(this.getDefaultCatalogIdentifiers());
 	}

 	private List<String> getDefaultCatalogIdentifiers() {
 		return this.vendor.getDefaultCatalogIdentifiers(this.dtpDatabase, this.getConnectionProfile().getUserName());
 	}

 	/**
 	 * Return the first catalog found.
 	 */
 	private DTPCatalogWrapper getCatalogForIdentifiers(List<String> identifiers) {
 		for (String identifier : identifiers) {
 			DTPCatalogWrapper catalog = this.getCatalogForIdentifier(identifier);
 			if (catalog != null) {
 				return catalog;
 			}
 		}
 		return null;
 	}

 	// ***** schemata

 	List<String> getDefaultSchemaIdentifiers() {
 		return this.vendor.getDefaultSchemaIdentifiers(this.dtpDatabase, this.getConnectionProfile().getUserName());
 	}


 	// ********** names vs. identifiers **********

 	/**
 	 * Convert the specified name to an identifier. Return null if the resulting
 	 * identifier matches the specified default name.
 	 */
 	String convertNameToIdentifier(String name, String defaultName) {
 		return this.vendor.convertNameToIdentifier(name, defaultName);
 	}

 	/**
 	 * Convert the specified name to an identifier.
 	 */
 	public String convertNameToIdentifier(String name) {
 		return this.vendor.convertNameToIdentifier(name);
 	}

 	/**
 	 * Return the database object identified by the specified identifier. If
 	 * the identifier is "delimited" (typically with double-quotes), it will be
 	 * used without any folding. If the name is "normal" (i.e. not delimited),
 	 * it will be folded to the appropriate case (typically uppercase).
 	 *
 	 * Since the database has the appropriate state to compare identifiers and
 	 * names, the connection profile delegates to here when using the default
 	 * "database finder".
 	 */
 	<T extends DatabaseObject> T selectDatabaseObjectForIdentifier_(T[] databaseObjects, String identifier) {
 		return this.selectDatabaseObjectNamed(databaseObjects, this.convertIdentifierToName(identifier));
 	}

 	/**
 	 * Convert the specified identifier to a name.
 	 */
 	String convertIdentifierToName(String identifier) {
 		return this.vendor.convertIdentifierToName(identifier);
 	}


 	// ********** Comparable implementation **********

 	public int compareTo(Database database) {
 		return Collator.getInstance().compare(this.getName(), database.getName());
 	}


 	// ********** internal methods **********

 	DatabaseDefinition getDTPDefinition() {
 		return RDBCorePlugin.getDefault().getDatabaseDefinitionRegistry().getDefinition(this.dtpDatabase);
 	}


 	// ********** listening **********

 	@Override
 	synchronized void startListening() {
 		if (this.catalogs != null) {
 			this.startCatalogs();
 		}
 		super.startListening();
 	}

 	private void startCatalogs() {
 		for (DTPCatalogWrapper catalog : this.catalogs) {
 			catalog.startListening();
 		}
 	}

 	@Override
 	synchronized void stopListening() {
 		if (this.catalogs != null) {
 			this.stopCatalogs();
 		}
 		super.stopListening();
 	}

 	private void stopCatalogs() {
 		for (DTPCatalogWrapper catalog : this.catalogs) {
 			catalog.stopListening();
 		}
 	}


 	// ********** clear **********

 	@Override
 	synchronized void clear() {
 		if (this.catalogs != null) {
 			this.clearCatalogs();
 		}
 		super.clear();
 	}

 	private void clearCatalogs() {
 		this.stopCatalogs();
 		for (DTPCatalogWrapper catalog : this.catalogs) {
 			catalog.clear();
 		}
 		this.catalogs = null;
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2006, 2009 Oracle. 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:
	* Oracle - initial API and implementation
	******************************************************************************/
	package org.eclipse.jpt.db.internal;

	import com.ibm.icu.text.Collator;
	import java.util.Iterator;
	import java.util.List;

	import org.eclipse.datatools.connectivity.sqm.core.definition.DatabaseDefinition;
	import org.eclipse.datatools.connectivity.sqm.internal.core.RDBCorePlugin;
	import org.eclipse.jpt.db.Catalog;
	import org.eclipse.jpt.db.Database;
	import org.eclipse.jpt.db.DatabaseObject;
	import org.eclipse.jpt.db.internal.vendor.Vendor;
	import org.eclipse.jpt.db.internal.vendor.VendorRepository;
	import org.eclipse.jpt.utility.internal.CollectionTools;
	import org.eclipse.jpt.utility.internal.iterators.ArrayIterator;
	import org.eclipse.jpt.utility.internal.iterators.TransformationIterator;

	/**
	* Wrap a DTP Database.
	*
	* Catalogs vs. Schemata:
	* Typically, if a DTP database does not support "catalogs",
	* o.e.datatools.modelbase.sql.schema.Database#getCatalogs() will return a
	* single catalog without a name (actually, it's an empty string). This catalog
	* will contain all the database's schemata. We try to ignore this catalog and
	* return the schemata from the database directly.
	*
	* Catalog Note 1:
	* As of Jan 2009, the DTP MySQL driver is not consistent with this pattern.
	* A DTP MySQL database has no catalogs; it holds a single schema
	* directly, and that schema has the same name as the database. See bug 249013.
	*
	* Catalog Note 2:
	* As of Jan 2009, the PostgreSQL JDBC driver complicates this pattern a bit.
	* Even though PostgreSQL does not support "catalogs", its JDBC driver
	* returns a single catalog that has the same name as the database specified
	* in the JDBC connection URL. The DTP PostgreSQL driver simply replicates this
	* behavior. Unfortunately, this catalog can be unnamed; i.e. its name is an
	* empty string....
	*
	* (Yet Another) Note:
	* We use "name" when dealing with the unmodified name of a database object
	* as supplied by the database itself (i.e. it is not delimited and it is always
	* case-sensitive).
	* We use "identifier" when dealing with a string representation of a database
	* object name (i.e. it may be delimited and, depending on the vendor, it may
	* be case-insensitive).
	*/
	final class DTPDatabaseWrapper
	extends DTPSchemaContainerWrapper
	implements Database
	{
	// the wrapped DTP database
	private final org.eclipse.datatools.modelbase.sql.schema.Database dtpDatabase;

	// vendor-specific behavior
	private final Vendor vendor;

	// lazy-initialized, sorted
	private DTPCatalogWrapper[] catalogs;


	// ******** constructor ********

	DTPDatabaseWrapper(DTPConnectionProfileWrapper connectionProfile, org.eclipse.datatools.modelbase.sql.schema.Database dtpDatabase) {
	super(connectionProfile, dtpDatabase);
	this.dtpDatabase = dtpDatabase;
	this.vendor = VendorRepository.instance().getVendor(this.getVendorName());
	}


	// ******** DTPWrapper implementation ********

	/* TODO
	* We might want to listen to the "virtual" catalog; but that's probably
	* not necessary since there is no easy way for the user to refresh it
	* (i.e. it is not displayed in the DTP UI).
	*/
	@Override
	synchronized void catalogObjectChanged() {
	super.catalogObjectChanged();
	this.getConnectionProfile().databaseChanged(this);
	}

	@Override
	public DTPDatabaseWrapper getDatabase() {
	return this;
	}


	// ******** DTPSchemaContainerWrapper implementation ********

	@Override
	List<org.eclipse.datatools.modelbase.sql.schema.Schema> getDTPSchemata() {
	return this.vendor.getSchemas(this.dtpDatabase);
	}

	@Override
	DTPSchemaWrapper getSchema(org.eclipse.datatools.modelbase.sql.schema.Schema dtpSchema) {
	return this.getSchema_(dtpSchema);
	}

	DTPSchemaWrapper getSchemaFromCatalogs(org.eclipse.datatools.modelbase.sql.schema.Schema dtpSchema) {
	return this.getCatalog(dtpSchema.getCatalog()).getSchema_(dtpSchema);
	}

	/**
	* this is only called from a schema when the database is the schema
	* container, so we know we don't have any catalogs
	*/
	@Override
	DTPTableWrapper getTable(org.eclipse.datatools.modelbase.sql.tables.Table dtpTable) {
	return this.getTable_(dtpTable);
	}

	/**
	* this is only called from a catalog, so we know we have catalogs;
	* i.e. the search has to descend through catalogs, then to schemata
	*/
	DTPTableWrapper getTableFromCatalogs(org.eclipse.datatools.modelbase.sql.tables.Table dtpTable) {
	return this.getCatalog(dtpTable.getSchema().getCatalog()).getTable_(dtpTable);
	}

	/**
	* this is only called from a schema when the database is the schema
	* container, so we know we don't have any catalogs
	*/
	@Override
	DTPColumnWrapper getColumn(org.eclipse.datatools.modelbase.sql.tables.Column dtpColumn) {
	return this.getColumn_(dtpColumn);
	}

	/**
	* this is only called from a catalog, so we know we have catalogs;
	* i.e. the search has to descend through catalogs, then to schemata
	*/
	DTPColumnWrapper getColumnFromCatalogs(org.eclipse.datatools.modelbase.sql.tables.Column dtpColumn) {
	return this.getCatalog(dtpColumn.getTable().getSchema().getCatalog()).getColumn_(dtpColumn);
	}


	// ******** DatabaseObject implementation ********

	public String getName() {
	return this.dtpDatabase.getName();
	}


	// ******** Database implementation ********

	public String getVendorName() {
	return this.dtpDatabase.getVendor();
	}

	public String getVersion() {
	return this.dtpDatabase.getVersion();
	}

	// override to make method public since it's in the Database interface
	@Override
	public <T extends DatabaseObject> T selectDatabaseObjectForIdentifier(T[] databaseObjects, String identifier) {
	return super.selectDatabaseObjectForIdentifier(databaseObjects, identifier);
	}

	// ***** catalogs

	public boolean supportsCatalogs() {
	return this.vendor.supportsCatalogs(this.dtpDatabase);
	}

	public Iterator<Catalog> catalogs() {
	return new ArrayIterator<Catalog>(this.getCatalogs());
	}

	private Iterator<DTPCatalogWrapper> catalogWrappers() {
	return new ArrayIterator<DTPCatalogWrapper>(this.getCatalogs());
	}

	private synchronized DTPCatalogWrapper[] getCatalogs() {
	if (this.catalogs == null) {
	this.catalogs = this.buildCatalogs();
	}
	return this.catalogs;
	}

	private DTPCatalogWrapper[] buildCatalogs() {
	List<org.eclipse.datatools.modelbase.sql.schema.Catalog> dtpCatalogs = this.getDTPCatalogs();
	DTPCatalogWrapper[] result = new DTPCatalogWrapper[dtpCatalogs.size()];
	for (int i = result.length; i-- > 0;) {
	result[i] = new DTPCatalogWrapper(this, dtpCatalogs.get(i));
	}
	return CollectionTools.sort(result);
	}

	private List<org.eclipse.datatools.modelbase.sql.schema.Catalog> getDTPCatalogs() {
	return this.vendor.getCatalogs(this.dtpDatabase);
	}

	public int catalogsSize() {
	return this.getCatalogs().length;
	}

	/**
	* return the catalog for the specified DTP catalog
	*/
	DTPCatalogWrapper getCatalog(org.eclipse.datatools.modelbase.sql.schema.Catalog dtpCatalog) {
	for (DTPCatalogWrapper catalog : this.getCatalogs()) {
	if (catalog.wraps(dtpCatalog)) {
	return catalog;
	}
	}
	throw new IllegalArgumentException("invalid DTP catalog: " + dtpCatalog); //$NON-NLS-1$
	}

	public DTPCatalogWrapper getCatalogNamed(String name) {
	return this.selectDatabaseObjectNamed(this.getCatalogs(), name);
	}

	public Iterator<String> sortedCatalogIdentifiers() {
	// the catalogs are already sorted
	return new TransformationIterator<DTPCatalogWrapper, String>(this.catalogWrappers()) {
	@Override
	protected String transform(DTPCatalogWrapper next) {
	return next.getIdentifier();
	}
	};
	}

	public DTPCatalogWrapper getCatalogForIdentifier(String identifier) {
	return this.selectDatabaseObjectForIdentifier(this.getCatalogs(), identifier);
	}

	public synchronized DTPCatalogWrapper getDefaultCatalog() {
	return this.getCatalogForIdentifiers(this.getDefaultCatalogIdentifiers());
	}

	private List<String> getDefaultCatalogIdentifiers() {
	return this.vendor.getDefaultCatalogIdentifiers(this.dtpDatabase, this.getConnectionProfile().getUserName());
	}

	/**
	* Return the first catalog found.
	*/
	private DTPCatalogWrapper getCatalogForIdentifiers(List<String> identifiers) {
	for (String identifier : identifiers) {
	DTPCatalogWrapper catalog = this.getCatalogForIdentifier(identifier);
	if (catalog != null) {
	return catalog;
	}
	}
	return null;
	}

	// ***** schemata

	List<String> getDefaultSchemaIdentifiers() {
	return this.vendor.getDefaultSchemaIdentifiers(this.dtpDatabase, this.getConnectionProfile().getUserName());
	}


	// ******** names vs. identifiers ********

	/**
	* Convert the specified name to an identifier. Return null if the resulting
	* identifier matches the specified default name.
	*/
	String convertNameToIdentifier(String name, String defaultName) {
	return this.vendor.convertNameToIdentifier(name, defaultName);
	}

	/**
	* Convert the specified name to an identifier.
	*/
	public String convertNameToIdentifier(String name) {
	return this.vendor.convertNameToIdentifier(name);
	}

	/**
	* Return the database object identified by the specified identifier. If
	* the identifier is "delimited" (typically with double-quotes), it will be
	* used without any folding. If the name is "normal" (i.e. not delimited),
	* it will be folded to the appropriate case (typically uppercase).
	*
	* Since the database has the appropriate state to compare identifiers and
	* names, the connection profile delegates to here when using the default
	* "database finder".
	*/
	<T extends DatabaseObject> T selectDatabaseObjectForIdentifier_(T[] databaseObjects, String identifier) {
	return this.selectDatabaseObjectNamed(databaseObjects, this.convertIdentifierToName(identifier));
	}

	/**
	* Convert the specified identifier to a name.
	*/
	String convertIdentifierToName(String identifier) {
	return this.vendor.convertIdentifierToName(identifier);
	}


	// ******** Comparable implementation ********

	public int compareTo(Database database) {
	return Collator.getInstance().compare(this.getName(), database.getName());
	}


	// ******** internal methods ********

	DatabaseDefinition getDTPDefinition() {
	return RDBCorePlugin.getDefault().getDatabaseDefinitionRegistry().getDefinition(this.dtpDatabase);
	}


	// ******** listening ********

	@Override
	synchronized void startListening() {
	if (this.catalogs != null) {
	this.startCatalogs();
	}
	super.startListening();
	}

	private void startCatalogs() {
	for (DTPCatalogWrapper catalog : this.catalogs) {
	catalog.startListening();
	}
	}

	@Override
	synchronized void stopListening() {
	if (this.catalogs != null) {
	this.stopCatalogs();
	}
	super.stopListening();
	}

	private void stopCatalogs() {
	for (DTPCatalogWrapper catalog : this.catalogs) {
	catalog.stopListening();
	}
	}


	// ******** clear ********

	@Override
	synchronized void clear() {
	if (this.catalogs != null) {
	this.clearCatalogs();
	}
	super.clear();
	}

	private void clearCatalogs() {
	this.stopCatalogs();
	for (DTPCatalogWrapper catalog : this.catalogs) {
	catalog.clear();
	}
	this.catalogs = null;
	}

	}