org.hibernate.mapping.Constraint Java Examples

/**
 * Processes the columns of the table and creates Unique Constraints for columns
 * annotated with @Column(unique = true).
 */
private static void initializeUniqueConstraints(Table table) {
  Iterator<Column> colIterator = table.getColumnIterator();
  while (colIterator.hasNext()) {
    Column col = colIterator.next();
    if (col.isUnique()) {
      String name = Constraint.generateName("UK_", table, col);
      UniqueKey uk = table.getOrCreateUniqueKey(name);
      uk.addColumn(col);
    }
  }
}
 

@Override
public String[] getSqlCreateStrings(Constraint constraint, Metadata metadata) {
	return new String[] {
			dialect.getUniqueDelegate().getAlterTableToAddUniqueKeyCommand(
					(UniqueKey) constraint,
					metadata
			)
	};
}
 

@Override
public String[] getSqlDropStrings(Constraint constraint, Metadata metadata) {
	return new String[] {
			dialect.getUniqueDelegate().getAlterTableToDropUniqueKeyCommand(
					(UniqueKey) constraint,
					metadata
			)
	};
}
 

protected void applyUniqueKeys(
		Table table,
		TableInformation tableInfo,
		Dialect dialect,
		Metadata metadata,
		Formatter formatter,
		ExecutionOptions options,
		GenerationTarget... targets) {
	if ( uniqueConstraintStrategy == null ) {
		uniqueConstraintStrategy = determineUniqueConstraintSchemaUpdateStrategy( metadata );
	}

	if ( uniqueConstraintStrategy != UniqueConstraintSchemaUpdateStrategy.SKIP ) {
		final Exporter<Constraint> exporter = dialect.getUniqueKeyExporter();

		final Iterator ukItr = table.getUniqueKeyIterator();
		while ( ukItr.hasNext() ) {
			final UniqueKey uniqueKey = (UniqueKey) ukItr.next();
			// Skip if index already exists. Most of the time, this
			// won't work since most Dialects use Constraints. However,
			// keep it for the few that do use Indexes.
			IndexInformation indexInfo = null;
			if ( tableInfo != null && StringHelper.isNotEmpty( uniqueKey.getName() ) ) {
				indexInfo = tableInfo.getIndex( Identifier.toIdentifier( uniqueKey.getName() ) );
			}
			if ( indexInfo == null ) {
				if ( uniqueConstraintStrategy == UniqueConstraintSchemaUpdateStrategy.DROP_RECREATE_QUIETLY ) {
					applySqlStrings(
							true,
							exporter.getSqlDropStrings( uniqueKey, metadata ),
							formatter,
							options,
							targets
					);
				}

				applySqlStrings(
						true,
						exporter.getSqlCreateStrings( uniqueKey, metadata ),
						formatter,
						options,
						targets
				);
			}
		}
	}
}
 

public Exporter<Constraint> getUniqueKeyExporter() {
	return uniqueKeyExporter;
}
 

@Override
public Exporter<Constraint> getUniqueKeyExporter() {
    return getInstance().getUniqueKeyExporter();
}