| /******************************************************************************* |
| * Copyright (c) 2006, 2007 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 java.util.Collections; |
| import java.util.Set; |
| import org.eclipse.jpt.utility.internal.ClassTools; |
| |
| /** |
| * NullDatabase |
| */ |
| public final class NullDatabase extends Database { |
| |
| private static NullDatabase INSTANCE; |
| |
| /** |
| * singleton support |
| */ |
| static synchronized Database instance() { |
| if( INSTANCE == null) { |
| INSTANCE = new NullDatabase(); |
| } |
| return INSTANCE; |
| } |
| |
| private NullDatabase() { |
| super(); |
| } |
| |
| // ********** behavior ********** |
| |
| @Override |
| void catalogChanged( Catalog catalog, int eventType) { |
| // do nothing |
| } |
| |
| @Override |
| void schemaChanged( Schema schema, int eventType) { |
| // do nothing |
| } |
| |
| @Override |
| void tableChanged( Table table, Schema schema,int eventType) { |
| // do nothing |
| } |
| |
| @Override |
| void refresh() { |
| // do nothing |
| } |
| |
| @Override |
| protected void dispose() { |
| // do nothing |
| } |
| |
| @Override |
| protected boolean connectionIsOnline() { |
| return false; |
| } |
| |
| // ********** queries ********** |
| |
| @Override |
| public String getName() { |
| return ClassTools.shortClassNameForObject( this); |
| } |
| |
| @Override |
| public String getVendor() { |
| return this.getName(); |
| } |
| |
| @Override |
| public String getVersion() { |
| return ""; |
| } |
| |
| // ***** catalogs |
| |
| @Override |
| public boolean supportsCatalogs() { |
| return false; |
| } |
| |
| @Override |
| public String getDefaultCatalogName() { |
| return ""; |
| } |
| |
| @Override |
| Set<Catalog> getCatalogs() { |
| return Collections.emptySet(); |
| } |
| |
| // ***** schemata |
| |
| @Override |
| Set<Schema> getSchemata() { |
| return Collections.emptySet(); |
| } |
| } |