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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.ArrayList;
import org.eclipse.datatools.modelbase.sql.schema.Database;
import org.eclipse.jpt.utility.internal.StringTools;
class MySQL
extends AbstractVendor
{
// singleton
private static final Vendor INSTANCE = new MySQL();
/**
* Return the singleton.
*/
static Vendor instance() {
return INSTANCE;
}
/**
* Ensure single instance.
*/
private MySQL() {
super();
}
@Override
public String getDTPVendorName() {
return "MySql"; //$NON-NLS-1$
}
/**
* The DTP model for MySQL has a database that contains no catalogs;
* but, instead, directly holds a single schema with the same name as
* the database. (This is hard-coded in MySqlCatalogDatabase.getSchemas().)
* Although you can qualify identifiers with a database name
* in MySQL, only the database specified at login seems to be available
* in the DTP model....
*
* NB: In MySQL DDL, SCHEMA is a synonym for DATABASE; but the JDBC
* method DatabaseMetaData.getSchemas() returns an empty list,
* while getCatalogs() returns a list of the available databases.
* You can also use the JDBC method Connection.setCatalog(String) to
* set the default database.
*/
@Override
CatalogStrategy getCatalogStrategy() {
return NoCatalogStrategy.instance();
}
/**
* MySQL is a bit unusual, so we force exact matches.
* (e.g. MySQL folds database and table names to lowercase on Windows
* by default; but that default can be changed by the
* 'lower_case_table_names' system variable. This is because databases are
* stored as directories and tables are stored as files in the underlying
* O/S; and the case-sensitivity of the names is determined by the behavior
* of filenames on the O/S. Then, to complicate things,
* none of the other identifiers, like index and column names, are folded;
* but they are case-insensitive, unless delimited. See
* http://dev.mysql.com/doc/refman/5.0/en/identifier-case-sensitivity.html.)
*/
@Override
FoldingStrategy getFoldingStrategy() {
return NonFoldingStrategy.instance();
}
@Override
void addDefaultSchemaNamesTo(Database database, String userName, ArrayList<String> names) {
names.add(database.getName());
}
/**
* MySQL is the only vendor that allows a digit.
* Although, the name cannnot be *all* digits.
*/
@Override
boolean characterIsRegularNameStart(char c) {
return Character.isDigit(c) || super.characterIsRegularNameStart(c);
}
@Override
char[] getExtendedRegularNameStartCharacters() {
return EXTENDED_REGULAR_NAME_START_CHARACTERS;
}
private static final char[] EXTENDED_REGULAR_NAME_START_CHARACTERS = new char[] { '_', '$' };
/**
* By default, MySQL delimits identifiers with backticks (`); but it
* can also be configured to use double-quotes.
*/
@Override
boolean identifierIsDelimited(String identifier) {
return StringTools.stringIsDelimited(identifier, BACKTICK)
|| super.identifierIsDelimited(identifier);
}
private static final char BACKTICK = '`';
}
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