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/*******************************************************************************
* Copyright (c) 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.vendor;
import java.util.Collections;
import java.util.List;
import org.eclipse.datatools.modelbase.sql.schema.Catalog;
import org.eclipse.datatools.modelbase.sql.schema.Database;
import org.eclipse.datatools.modelbase.sql.schema.Schema;
/**
* Catalog strategy for DTP databases that build a "virtual" catalog (that has
* no name) because the underlying JDBC driver does not return any catalogs
* (e.g. Oracle).
* @see java.sql.DatabaseMetaData#getCatalogs()
*/
class FauxCatalogStrategy
implements CatalogStrategy
{
// singleton
private static final CatalogStrategy INSTANCE = new FauxCatalogStrategy();
/**
* Return the singleton.
*/
static CatalogStrategy instance() {
return INSTANCE;
}
/**
* Ensure single instance.
*/
private FauxCatalogStrategy() {
super();
}
public boolean supportsCatalogs(Database database) {
return false;
}
public List<Catalog> getCatalogs(Database database) {
return Collections.emptyList();
}
@SuppressWarnings("unchecked")
public List<Schema> getSchemas(Database database) {
return this.getFauxCatalog(database.getCatalogs()).getSchemas();
}
private Catalog getFauxCatalog(List<Catalog> catalogs) {
if (catalogs == null) {
throw new IllegalStateException();
}
if (catalogs.size() != 1) {
throw new IllegalStateException("not a single catalog: " + catalogs.size()); //$NON-NLS-1$
}
Catalog catalog = catalogs.get(0);
if (catalog.getName().length() != 0) {
throw new IllegalStateException("illegal name: " + catalog.getName()); //$NON-NLS-1$
}
return catalog;
}
}
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