org.apache.openjpa.jdbc.schema
Class LocalConstraint

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

Direct Known Subclasses:

Index, PrimaryKey, Unique

public abstract class LocalConstraint
extends Constraint

Constraint over local table columns, as opposed to a foreign key which spans tables. Column APIs can represent a full constraint or a partial constraint, aligning with DatabaseMetaData.

Author:

Abe White

Constructor Summary

LocalConstraint()
Default constructor.

LocalConstraint(String name, Table table)
Constructor.

Method Summary

void	addColumn(Column col) Add a column to the constraint.
boolean	columnsMatch(Column[] ocols) Return true if the given columns match the columns of this constraint.
boolean	containsColumn(Column col) Return true if the pk includes the given column.
void	deref()
void	derefColumns() Deref all columns in this constraint.
protected boolean	equalsLocalConstraint(LocalConstraint lc) Return true if the columns of this constraint matches that of the given one.
Column[]	getColumns() Return all the columns the constraint spans.
int	getRefCount()
void	ref()
void	refColumns() Ref all columns in this constraint.
boolean	removeColumn(Column col) Remove a column from the constraint.
void	setColumns(Column[] cols) Set the columns the constraint spans.

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

getColumnName, getFullName, getName, getSchemaName, getTable, getTableName, isDeferred, isLogical, 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

LocalConstraint

public LocalConstraint()

Default constructor.

LocalConstraint

public LocalConstraint(String name,
                       Table table)

Constructor.

Parameters:

name - the name of the constraint, if any

table - the table of the constraint

Method Detail

getColumns

public Column[] getColumns()

Return all the columns the constraint spans.

setColumns

public void setColumns(Column[] cols)

Set the columns the constraint spans.

addColumn

public void addColumn(Column col)

Add a column to the constraint.

removeColumn

public boolean removeColumn(Column col)

Remove a column from the constraint.

Returns:

true if the column was removed, false if not part of the primary key

containsColumn

public boolean containsColumn(Column col)

Return true if the pk includes the given column.

refColumns

public void refColumns()

Ref all columns in this constraint.

derefColumns

public void derefColumns()

Deref all columns in this constraint.

columnsMatch

public boolean columnsMatch(Column[] ocols)

Return true if the given columns match the columns of this constraint.

equalsLocalConstraint

protected boolean equalsLocalConstraint(LocalConstraint lc)

Return true if the columns of this constraint matches that of the given one. The constraints are not compared on name.

getRefCount

public int getRefCount()

ref

public void ref()

deref

public void deref()