org.apache.torque.engine.database.model
Class Unique

java.lang.Object
  org.apache.torque.engine.database.model.Index
      org.apache.torque.engine.database.model.Unique

public class Unique
extends Index

Information about unique columns of a table. This class assumes that in the underlying RDBMS, unique constraints and unique indices are roughly equivalent. For example, adding a unique constraint to a column also creates an index on that column (this is known to be true for MySQL and Oracle).

Version:

$Id: Unique.java,v 1.1 2007-10-21 07:57:27 abyrne Exp $

Author:

Jason van Zyl, Daniel Rall

Constructor Summary

Unique()

Method Summary

boolean	isUnique() Returns true.
String	toString() String representation of the index.

Methods inherited from class org.apache.torque.engine.database.model.Index

addColumn, addOption, getColumnList, getColumnNames, getColumns, getName, getOption, getOptions, getTable, getTableName, loadFromXML, setName, setTable

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Unique

public Unique()

Method Detail

isUnique

public final boolean isUnique()

Returns true.

Overrides:

isUnique in class Index

Returns:

true

toString

public String toString()

String representation of the index. This is an xml representation.

Overrides:

toString in class Index

Returns:

string representation in xml