Package org.apache.slide.structure

Contains classes for navigating and manipulating the hierarchy of nodes in a namespace.

See:
Description

Interface Summary

Structure

Structure helper.

Class Summary

ActionNode	Action node class.
GroupNode	GroupNode class
LinkNode	Link node class.
ObjectNode	Represents any kind of object node.
StructureImpl	Default implementation of the Structure interface.
SubjectNode	Subject node class.

Exception Summary

LinkedObjectNotFoundException	Linked object not found.
ObjectAlreadyExistsException	Object already exists.
ObjectHasChildrenException	Object has children.
ObjectNotFoundException	Object not found.
StructureException	Data exception.

Package org.apache.slide.structure Description

Contains classes for navigating and manipulating the hierarchy of nodes in a namespace.

Nodes

The hierarchy of a namespace is composed of nodes. Each node can have children (called sub-nodes). Just like in a filesystem, nodes have different types. ObjectNode is an abstract data type that can represent any node in the namespace structure. In addition, every node must be of either of the following concrete types:

• SubjectNode is the most common type of node used in a namespace. A subject can be a file, a directory or a principal.
• LinkNode represents a node that is a link to another node in the same namespace.
• GroupNode is used to define a group of nodes (usually of users).
• ActionNode is a type for defining available actions on nodes.

The type of a node determines which roles that node has. See the org.apache.slide.security package for more information on roles.

Structure Helper

The central point in this package is the Structure interface, also referred to as the Structure Helper, which you can access using the NamespaceAccessToken.getStructureHelper() method. It provides all the methods required to access and manipulate the node hierarchy of a namespace.