org.openlowcode.server.data

Class NodeTree<E extends DataObject<E>>

java.lang.Object

org.openlowcode.server.data.NodeTree<E>

Type Parameters:

E - the data object represented in the node tree

public class NodeTree<E extends DataObject<E>>
extends java.lang.Object

The node tree stores a hierarchy of objects

Author:

Open Lowcode SAS

Constructor Summary

Constructors

Constructor and Description
NodeTree(DataObjectDefinition<E> type) creates an empty node tree for the given type
NodeTree(E parent) creates a node tree with the given object as root node

Method Summary

Modifier and Type	Method and Description
boolean	addChild(E parent, E child) creates a link between the parent and the child.
java.lang.String	generateNextTransientId() generates transient id for objects when required
ObjectTreeDataElt<TObjectDataElt<E>>	generateObjectTreeDataElt(java.lang.String name) generates an object tree data element
E	getChild(E parent, int index) get the child at the given index for the given parent
int	getChildrenNumber(E parent) get the number of children for the given parent
E	getRoot() get the root object for the tree

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeTree

public NodeTree(DataObjectDefinition<E> type)

creates an empty node tree for the given type

Parameters:

type - type of data object definition

NodeTree

public NodeTree(E parent)

creates a node tree with the given object as root node

Parameters:

parent - root node of the tree

Method Detail

generateNextTransientId

public java.lang.String generateNextTransientId()

generates transient id for objects when required

Returns:

a generated transient id local to the node tree

addChild

public boolean addChild(E parent,
                        E child)

creates a link between the parent and the child. The parent should already be in the tree

Parameters:

parent - parent object

child - child object

Returns:

true if the object is added for the first time in the link, false if the object is not yet added

getChildrenNumber

public int getChildrenNumber(E parent)

get the number of children for the given parent

Parameters:

parent - parent

Returns:

the number of children

getChild

public E getChild(E parent,
                  int index)

get the child at the given index for the given parent

Parameters:

parent - parent

index - index between 0 (included) and getChildrenNumber (excluded)

Returns:

the child at the given index

getRoot

public E getRoot()

get the root object for the tree

Returns:

the root object for the tree

generateObjectTreeDataElt

public ObjectTreeDataElt<TObjectDataElt<E>> generateObjectTreeDataElt(java.lang.String name)

generates an object tree data element

Parameters:

name - name of the data element

Returns:

and object tree data element