org.apache.openjpa.jdbc.schema
Class Index

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

All Implemented Interfaces:

Serializable

public class Index
extends LocalConstraint

Represents a database index. Can also represent a partial index, aligning with DatabaseMetaData.

Author:

Abe White, Stephen Kim

See Also:

Serialized Form

Constructor Summary

Index()
Default constructor.

Index(String name, Table table)
Constructor.

Method Summary

void	deref()
boolean	equalsIndex(Index idx) Indexes are equal if they have the same name, the same columns, and are both unique/not unique.
int	getRefCount()
boolean	isLogical() Return whether this constraint is a logical constraint only; i.e.
boolean	isUnique() Return true if this is a UNIQUE index.
void	ref()
void	setUnique(boolean unique) Set whether this is a UNIQUE index.

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

Index

public Index()

Default constructor.

Index

public Index(String name,
             Table table)

Constructor.

Parameters:

name - the name of the index

table - the table of the index

Method Detail

isUnique

public boolean isUnique()

Return true if this is a UNIQUE index.

setUnique

public void setUnique(boolean unique)

Set whether this is a UNIQUE index.

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

equalsIndex

public boolean equalsIndex(Index idx)

Indexes are equal if they have the same name, the same columns, and are both unique/not unique.

getRefCount

public int getRefCount()

ref

public void ref()

deref

public void deref()