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

All Implemented Interfaces:

Serializable

public class Unique
extends LocalConstraint

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

Author:

Abe White, Pinaki Poddar

See Also:

Serialized Form

Constructor Summary

Unique()

Unique(DBIdentifier name, Table table)

Unique(String name, Table table)
Deprecated.

Method Summary

void	addColumn(Column col) Adds the given column.
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()
void	setIdentifier(DBIdentifier name)
void	setName(String name) Deprecated.

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

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

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

getColumnIdentifier, getColumnName, getFullIdentifier, getFullName, getIdentifier, getName, getQualifiedPath, getSchemaIdentifier, getSchemaName, getTable, getTableIdentifier, getTableName, isDeferred, setColumnIdentifier, setColumnName, setDeferred, setSchemaIdentifier, setSchemaName, setTableIdentifier, setTableName, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Unique

public Unique()

Unique

public Unique(String name,
              Table table)

Deprecated.

Construct with given name.

Parameters:

name - the name of the constraint, if any

table - the table of the constraint

Unique

public Unique(DBIdentifier name,
              Table table)

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

addColumn

public void addColumn(Column col)

Adds the given column. The added column is set to non-nullable because a unique constraint on the database requires that its constituent columns are NOT NULL.

Overrides:

addColumn in class LocalConstraint

See Also:

Column.setNotNull(boolean)

setName

public void setName(String name)

Deprecated.

Set the name of the constraint. This method cannot be called if the constraint already belongs to a table.

Overrides:

setName in class Constraint

setIdentifier

public void setIdentifier(DBIdentifier name)

Overrides:

setIdentifier 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()