org.hibernate.hql.internal.NameGenerator Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate.hql.internal;
import org.hibernate.MappingException;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.type.Type;
/**
* Provides utility methods for generating HQL / SQL names. Shared by both the 'classic' and 'new' query translators.
*
* @author josh
*/
public final class NameGenerator {
/**
* Private empty constructor (checkstyle says utility classes should not have default constructors).
*/
private NameGenerator() {
}
public static String[][] generateColumnNames(Type[] types, SessionFactoryImplementor f) throws MappingException {
String[][] columnNames = new String[types.length][];
for ( int i = 0; i < types.length; i++ ) {
int span = types[i].getColumnSpan( f );
columnNames[i] = new String[span];
for ( int j = 0; j < span; j++ ) {
columnNames[i][j] = NameGenerator.scalarName( i, j );
}
}
return columnNames;
}
public static String scalarName(int x, int y) {
return scalarName( "col_" + x, y );
}
public static String scalarName(String base, int num) {
return base + '_' + num + '_';
}
public static String[] scalarNames(String base, int count) {
final String[] names = new String[count];
for ( int j = 0; j < count; j++ ) {
names[j] = scalarName( base, j );
}
return names;
}
public static String[] scalarNames(int uniqueness, int count) {
return scalarNames( "col_" + uniqueness, count );
}
}