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//$Id: UniqueKey.java 5724 2005-02-14 10:59:36Z maxcsaucdk $
package org.hibernate.mapping;
import java.util.Iterator;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.Mapping;
import org.hibernate.util.StringHelper;
/**
* A relational unique key constraint
* @author Gavin King
*/
public class UniqueKey extends Constraint {
public String sqlConstraintString(Dialect dialect) {
StringBuffer buf = new StringBuffer("unique (");
Iterator iter = getColumnIterator();
while ( iter.hasNext() ) {
buf.append( ( (Column) iter.next() ).getQuotedName(dialect) );
if ( iter.hasNext() ) buf.append(", ");
}
return buf.append(')').toString();
}
public String sqlConstraintString(Dialect dialect, String constraintName, String defaultCatalog, String defaultSchema) {
StringBuffer buf = new StringBuffer(
dialect.getAddPrimaryKeyConstraintString(constraintName)
).append('(');
Iterator iter = getColumnIterator();
while ( iter.hasNext() ) {
buf.append( ( (Column) iter.next() ).getQuotedName(dialect) );
if ( iter.hasNext() ) buf.append(", ");
}
return StringHelper.replace( buf.append(')').toString(), "primary key", "unique" ); //TODO: improve this hack!
}
public String sqlCreateString(Dialect dialect, Mapping p, String defaultCatalog, String defaultSchema) {
if ( dialect.supportsUniqueConstraintInCreateAlterTable() ) {
return super.sqlCreateString(dialect, p, defaultCatalog, defaultSchema);
}
else {
return Index.buildSqlCreateIndexString(dialect, getName(), getTable(), getColumnIterator(), true, defaultCatalog, defaultSchema);
}
}
public String sqlDropString(Dialect dialect, String defaultCatalog, String defaultSchema) {
if( dialect.supportsUniqueConstraintInCreateAlterTable() ) {
return super.sqlDropString(dialect, defaultCatalog, defaultSchema);
}
else {
return Index.buildSqlDropIndexString(dialect, getTable(), getName(), defaultCatalog, defaultSchema);
}
}
}
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