org.mmbase.bridge.implementation
Class BasicRelationManager

java.lang.Object
  |
  +--org.mmbase.bridge.implementation.BasicNodeManager
        |
        +--org.mmbase.bridge.implementation.BasicRelationManager

All Implemented Interfaces:

java.lang.Comparable, NodeManager, RelationManager

public class BasicRelationManager

extends BasicNodeManager

implements RelationManager

Version:

$Id: BasicRelationManager.java,v 1.14 2002/01/31 10:05:12 pierre Exp $

Author:

Rob Vermeulen, Pierre van Rooden

Fields inherited from class org.mmbase.bridge.implementation.BasicNodeManager

builder, cloud, fieldTypes

Fields inherited from interface org.mmbase.bridge.RelationManager

BIDIRECTIONAL, UNIDIRECTIONAL

Fields inherited from interface org.mmbase.bridge.NodeManager

ORDER_CREATE, ORDER_EDIT, ORDER_LIST, ORDER_SEARCH

Method Summary

Node	createNode() Creates a new node.
Relation	createRelation(Node sourceNode, Node destinationNode) Adds a relation from this type.
boolean	equals(java.lang.Object o) Compares two relationmanagers, and returns true if they are equal.
int	getBuilder()
NodeManager	getDestinationManager() Retrieves the type of node that can act as the destination of a relation of this type.
int	getDirectionality() Retrieves the directionality for this type (the default assigned to a new relation).
java.lang.String	getForwardRole() Retrieves the role of the source to the destination
java.lang.String	getReciprocalRole() Retrieves the role of the destination to the source
RelationList	getRelations(Node node) Retrieves all the relations of this type from a given node.
NodeManager	getSourceManager() Retrieves the NodeManager of node that can act as the source of a relation of this type.
int	hashCode() Returns the relationmanager's hashCode.
boolean	mayCreateRelation(Node sourceNode, Node destinationNode) Check if the current user may create a new relation of this type between the specified nodes.

Methods inherited from class org.mmbase.bridge.implementation.BasicNodeManager

compareTo, getCloud, getDescription, getField, getFields, getFields, getGUIName, getInfo, getInfo, getList, getList, getList, getName, init, mayCreateNode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.mmbase.bridge.NodeManager

getCloud, getDescription, getField, getFields, getFields, getGUIName, getInfo, getInfo, getList, getList, getList, getName, mayCreateNode

Method Detail

createNode

public Node createNode()

Description copied from interface: NodeManager

Creates a new node. The returned node will not be visible in the cloud until the commit() method is called on this node. Until then it will have a temporary node number.

Specified by:

createNode in interface NodeManager

Overrides:

createNode in class BasicNodeManager

Following copied from interface: org.mmbase.bridge.NodeManager

Returns:

the new Node

getForwardRole

public java.lang.String getForwardRole()

Description copied from interface: RelationManager

Retrieves the role of the source to the destination

Specified by:

getForwardRole in interface RelationManager

Following copied from interface: org.mmbase.bridge.RelationManager

Returns:

the role as a String

getReciprocalRole

public java.lang.String getReciprocalRole()

Description copied from interface: RelationManager

Retrieves the role of the destination to the source

Specified by:

getReciprocalRole in interface RelationManager

Following copied from interface: org.mmbase.bridge.RelationManager

Returns:

the role as a String

getDirectionality

public int getDirectionality()

Description copied from interface: RelationManager

Retrieves the directionality for this type (the default assigned to a new relation).

Specified by:

getDirectionality in interface RelationManager

Following copied from interface: org.mmbase.bridge.RelationManager

Returns:

one of the directionality constants

getBuilder

public int getBuilder()

getSourceManager

public NodeManager getSourceManager()

Description copied from interface: RelationManager

Retrieves the NodeManager of node that can act as the source of a relation of this type.

Specified by:

getSourceManager in interface RelationManager

Following copied from interface: org.mmbase.bridge.RelationManager

Returns:

the source NodeManager

getDestinationManager

public NodeManager getDestinationManager()

Description copied from interface: RelationManager

Retrieves the type of node that can act as the destination of a relation of this type.

Specified by:

getDestinationManager in interface RelationManager

Following copied from interface: org.mmbase.bridge.RelationManager

Returns:

the destination NodeManager

createRelation

public Relation createRelation(Node sourceNode,
                               Node destinationNode)

Description copied from interface: RelationManager

Adds a relation from this type.

Specified by:

createRelation in interface RelationManager

Following copied from interface: org.mmbase.bridge.RelationManager

Parameters:

sourceNode - the node from which you want to relate

destinationNode - the node to which you want to relate

Returns:

the added relation

getRelations

public RelationList getRelations(Node node)

Description copied from interface: RelationManager

Retrieves all the relations of this type from a given node.

Specified by:

getRelations in interface RelationManager

Following copied from interface: org.mmbase.bridge.RelationManager

Parameters:

node - the node from which to give the relations

Returns:

a list of relations

equals

public boolean equals(java.lang.Object o)

Compares two relationmanagers, and returns true if they are equal. This effectively means that both objects are relationmanagers, and they both use to the same builder type

Overrides:

equals in class BasicNodeManager

Parameters:

o - the object to compare it with

hashCode

public int hashCode()

Returns the relationmanager's hashCode. This effectively returns the object number of the typerel record

Overrides:

hashCode in class BasicNodeManager

mayCreateRelation

public boolean mayCreateRelation(Node sourceNode,
                                 Node destinationNode)

Description copied from interface: RelationManager

Check if the current user may create a new relation of this type between the specified nodes.

Specified by:

mayCreateRelation in interface RelationManager

Following copied from interface: org.mmbase.bridge.RelationManager

Returns:

Check if the current user may create a new relation of this type between the specified nodes.