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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* JBoss, Home of Professional Open Source
* Copyright 2012 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* 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,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.hibernate.dialect.unique;
import java.util.Iterator;
import org.hibernate.dialect.Dialect;
import org.hibernate.metamodel.relational.Column;
import org.hibernate.metamodel.relational.Table;
import org.hibernate.metamodel.relational.UniqueKey;
/**
* The default UniqueDelegate implementation for most dialects. Uses
* separate create/alter statements to apply uniqueness to a column.
*
* @author Brett Meyer
*/
public class DefaultUniqueDelegate implements UniqueDelegate {
protected final Dialect dialect;
public DefaultUniqueDelegate( Dialect dialect ) {
this.dialect = dialect;
}
@Override
public String applyUniqueToColumn( org.hibernate.mapping.Column column ) {
return "";
}
@Override
public String applyUniqueToColumn( Column column ) {
return "";
}
@Override
public String applyUniquesToTable( org.hibernate.mapping.Table table ) {
return "";
}
@Override
public String applyUniquesToTable( Table table ) {
return "";
}
@Override
public String applyUniquesOnAlter( org.hibernate.mapping.UniqueKey uniqueKey,
String defaultCatalog, String defaultSchema ) {
// Do this here, rather than allowing UniqueKey/Constraint to do it.
// We need full, simplified control over whether or not it happens.
return new StringBuilder( "alter table " )
.append( uniqueKey.getTable().getQualifiedName(
dialect, defaultCatalog, defaultSchema ) )
.append( " add constraint " )
.append( uniqueKey.getName() )
.append( uniqueConstraintSql( uniqueKey ) )
.toString();
}
@Override
public String applyUniquesOnAlter( UniqueKey uniqueKey ) {
// Do this here, rather than allowing UniqueKey/Constraint to do it.
// We need full, simplified control over whether or not it happens.
return new StringBuilder( "alter table " )
.append( uniqueKey.getTable().getQualifiedName( dialect ) )
.append( " add constraint " )
.append( uniqueKey.getName() )
.append( uniqueConstraintSql( uniqueKey ) )
.toString();
}
@Override
public String dropUniquesOnAlter( org.hibernate.mapping.UniqueKey uniqueKey,
String defaultCatalog, String defaultSchema ) {
// Do this here, rather than allowing UniqueKey/Constraint to do it.
// We need full, simplified control over whether or not it happens.
return new StringBuilder( "alter table " )
.append( uniqueKey.getTable().getQualifiedName(
dialect, defaultCatalog, defaultSchema ) )
.append( " drop constraint " )
.append( dialect.quote( uniqueKey.getName() ) )
.toString();
}
@Override
public String dropUniquesOnAlter( UniqueKey uniqueKey ) {
// Do this here, rather than allowing UniqueKey/Constraint to do it.
// We need full, simplified control over whether or not it happens.
return new StringBuilder( "alter table " )
.append( uniqueKey.getTable().getQualifiedName( dialect ) )
.append( " drop constraint " )
.append( dialect.quote( uniqueKey.getName() ) )
.toString();
}
@Override
public String uniqueConstraintSql( org.hibernate.mapping.UniqueKey uniqueKey ) {
StringBuilder sb = new StringBuilder();
sb.append( " unique (" );
Iterator columnIterator = uniqueKey.getColumnIterator();
while ( columnIterator.hasNext() ) {
org.hibernate.mapping.Column column
= (org.hibernate.mapping.Column) columnIterator.next();
sb.append( column.getQuotedName( dialect ) );
if ( columnIterator.hasNext() ) {
sb.append( ", " );
}
}
return sb.append( ')' ).toString();
}
@Override
public String uniqueConstraintSql( UniqueKey uniqueKey ) {
StringBuilder sb = new StringBuilder();
sb.append( " unique (" );
Iterator columnIterator = uniqueKey.getColumns().iterator();
while ( columnIterator.hasNext() ) {
org.hibernate.mapping.Column column
= (org.hibernate.mapping.Column) columnIterator.next();
sb.append( column.getQuotedName( dialect ) );
if ( columnIterator.hasNext() ) {
sb.append( ", " );
}
}
return sb.append( ')' ).toString();
}
}