org.apache.openjpa.jdbc.schema
Class PrimaryKey

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

public class PrimaryKey
extends LocalConstraint

Represents a table primary key. It can also represent a partial key, aligning with the key information available from DatabaseMetaData.

Author:

Abe White

Constructor Summary

PrimaryKey()
Default constructor.

PrimaryKey(String name, Table table)
Constructor.

Method Summary

void	addColumn(Column col) Add a column to the constraint.
void	deref()
boolean	equalsPrimaryKey(PrimaryKey pk) 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	setLogical(boolean logical)

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

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

PrimaryKey

public PrimaryKey()

Default constructor.

PrimaryKey

public PrimaryKey(String name,
                  Table table)

Constructor.

Parameters:

name - the name of the primary key, if any

table - the table of the primary key

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

setLogical

public void setLogical(boolean logical)

addColumn

public void addColumn(Column col)

Description copied from class: LocalConstraint

Add a column to the constraint.

Overrides:

addColumn in class LocalConstraint

equalsPrimaryKey

public boolean equalsPrimaryKey(PrimaryKey pk)

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()