org.apache.openjpa.jdbc.schema
Class Unique

java.lang.Object
  org.apache.openjpa.jdbc.schema.Constraint
      org.apache.openjpa.jdbc.schema.LocalConstraint
          org.apache.openjpa.jdbc.schema.Unique

public class Unique
extends LocalConstraint

Represents a unique constraint. It can also represent a partial constraint.

Author:

Abe White

Constructor Summary

Unique()
Default constructor.

Unique(String name, Table table)
Constructor.

Method Summary

void	deref()
boolean	equalsUnique(Unique unq) Return true if the structure of this primary key matches that of the given one (same table, same columns).
int	getRefCount()
boolean	isLogical() Return whether this constraint is a logical constraint only; i.e.
void	ref()

Methods inherited from class org.apache.openjpa.jdbc.schema.LocalConstraint

addColumn, columnsMatch, containsColumn, derefColumns, equalsLocalConstraint, getColumns, refColumns, removeColumn, setColumns

Methods inherited from class org.apache.openjpa.jdbc.schema.Constraint

getColumnName, getFullName, getName, getSchemaName, getTable, getTableName, isDeferred, setColumnName, setDeferred, setName, setSchemaName, setTableName, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Unique

public Unique()

Default constructor.

Unique

public Unique(String name,
              Table table)

Constructor.

Parameters:

name - the name of the constraint, if any

table - the table of the constraint

Method Detail

isLogical

public boolean isLogical()

Description copied from class: Constraint

Return whether this constraint is a logical constraint only; i.e. if it does not exist in the database.

Specified by:

isLogical in class Constraint

equalsUnique

public boolean equalsUnique(Unique unq)

Return true if the structure of this primary key matches that of the given one (same table, same columns).

getRefCount

public int getRefCount()

ref

public void ref()

deref

public void deref()