org.apache.openjpa.jdbc.schema
Class Unique

java.lang.Object
  extended by org.apache.openjpa.jdbc.schema.Constraint
      extended by org.apache.openjpa.jdbc.schema.LocalConstraint
          extended by 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
See Also:
Serialized Form

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()


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