EOJoin

Inherits from:
Object

Package:
com.webobjects.eoaccess

Class Description

An EOJoin describes one source-destination attribute pair for an EORelationship. See the EORelationship class specification for more information and for examples.

Method Types

Constructors
EOJoin
Querying the join
destinationAttribute
isReciprocalToJoin
sourceAttribute

Constructors

EOJoin

public EOJoin( EOAttribute source, EOAttribute destination)

Creates and returns a new EOJoin with the given source and destination attributes. See the EORelationship class specification for an example of creating a relationship using EOJoins.

See Also: addJoin (EORelationship)

Instance Methods

clone

public Object clone()

Description forthcoming.

destinationAttribute

public EOAttribute destinationAttribute()

Returns the destination ("right") attribute used by the join.

See Also: destinationAttributes (EORelationship)

equals

public boolean equals(Object anObject)

Description forthcoming.

isReciprocalToJoin

public boolean isReciprocalToJoin(EOJoin otherJoin)

Returns true if this join's source attribute is equal to otherJoin's destination attribute and otherJoin's source attribute is equal to this join's destination attribute. This is known as a back-referencing join.

See Also: inverseRelationship (EORelationship)

sourceAttribute

public EOAttribute sourceAttribute()

Returns the source ("left") attribute used by the join.

See Also: sourceAttributes (EORelationship)

toString

public String toString()

Returns a String representation of the receiver.