iitb.con.core
Class RelationInstance

java.lang.Object
  iitb.con.core.Instance
      iitb.con.core.RelationInstance

public class RelationInstance
extends Instance

Relations are associated with the entities and instances.
RelationIntance interface provides methods to set and remove the relations among the entity instances.

The relation is created between two items, which is considered as left-item and right-item.

See Also:

Instance, Relation

Field Summary

int	leftInstanceId Relation's left instance id
int	rightInstanceId Relation's right instance id

Fields inherited from class iitb.con.core.Instance

id, typeId

Constructor Summary

RelationInstance()

Method Summary

java.lang.Object	getAttributeValue(java.lang.String name) Returns the specified attributes value. This method should be over-ridden by the specialized instances
byte	getDirection() Returns the direction kind in the relation. 0 - LEFT_TO_RIGHT 1 - BIDIRECTIONAL
java.lang.String	getLeftRole() Returns the left role name of the relation.
java.lang.String	getRightRole() Returns the right role name of the relation.
void	setAttributeValue(java.lang.String name, java.lang.Object value) Sets the instance's attribute value. This method should be over-ridden by the specialized instances
Result	setLeftInstance(EntityInstance instance) Sets the instance for the left item.
Result	setRightInstance(EntityInstance instance) Sets the instance for the right item.

Methods inherited from class iitb.con.core.Instance

setType

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

leftInstanceId

public int leftInstanceId

Relation's left instance id

rightInstanceId

public int rightInstanceId

Relation's right instance id

Constructor Detail

RelationInstance

public RelationInstance()

Method Detail

getAttributeValue

public java.lang.Object getAttributeValue(java.lang.String name)

Description copied from class: Instance

Returns the specified attributes value.
This method should be over-ridden by the specialized instances

Overrides:

getAttributeValue in class Instance

Parameters:

name - attribute name

Returns:

attribute value

getDirection

public byte getDirection()

Returns the direction kind in the relation.
0 - LEFT_TO_RIGHT
1 - BIDIRECTIONAL

Returns:

byte - direction kind

getLeftRole

public java.lang.String getLeftRole()

Returns the left role name of the relation.

Returns:

left role name

getRightRole

public java.lang.String getRightRole()

Returns the right role name of the relation.

Returns:

right role name

setAttributeValue

public void setAttributeValue(java.lang.String name,
                              java.lang.Object value)

Description copied from class: Instance

Sets the instance's attribute value.
This method should be over-ridden by the specialized instances

Overrides:

setAttributeValue in class Instance

Parameters:

name - attribute name

value - attribute's value

setLeftInstance

public Result setLeftInstance(EntityInstance instance)

Sets the instance for the left item.

Parameters:

instance - EntityInstance

Returns:

Result

setRightInstance

public Result setRightInstance(EntityInstance instance)

Sets the instance for the right item.

Parameters:

instance - EntityInstance

Returns:

Result