OSID - osid.financials.ActivityHierarchyDesignSession Service Interface Definition

Interface	osid.financials.ActivityHierarchyDesignSession
Implements	`osid.OsidSession`
Description	This session defines methods for managing a hierarchy of `Activity` objects. Each node in the hierarchy is a unique `Activity.`
Method	getActivityHierarchyId
Description	Gets the hierarchy `Id` associated with this session.
Return	`osid.id.Id`		the hierarchy `Id` associated with this session
Compliance	`mandatory`		This method must be implemented.
Method	getActivityHierarchy
Description	Gets the hierarchy associated with this session.
Return	`osid.hierarchy.Hierarchy`		the hierarchy associated with this session
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	canModifyActivityHierarchy
Description	Tests if this user can change the hierarchy. A return of true does not guarantee successful authorization. A return of false indicates that it is known performing any update will result in a `PERMISSION_DENIED.` This is intended as a hint to an application that may opt not to offer these operations to an unauthorized user.
Return	`boolean`		`false` if changing this hierarchy is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	addRootActivity
Description	Adds a root activity.
Parameters	`osid.id.Id`	`activityId`	the `Id` of an activity
Errors	ALREADY_EXISTS		`activityId` is already in hierarchy
	NOT_FOUND		`activityId` not found
	NULL_ARGUMENT		`activityId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	removeRootActivity
Description	Removes a root activity.
Parameters	`osid.id.Id`	`activityId`	the `Id` of an activity
Errors	NOT_FOUND		`activityId` not found
	NULL_ARGUMENT		`activityId` is `null`
	OPERATION_FAILED		the root activities
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	addChildActivity
Description	Adds a child to an activity.
Parameters	`osid.id.Id`	`activityId`	the `Id` of an activity
Parameters	`osid.id.Id`	`childId`	the `Id` of the new child
Errors	ALREADY_EXISTS		`activityId` is already a parent of `childId`
	NOT_FOUND		`activityId` or `childId` not found
	NULL_ARGUMENT		`activityId` or `childId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	removeChildActivity
Description	Removes a child from an activity.
Parameters	`osid.id.Id`	`activityId`	the `Id` of an activity
Parameters	`osid.id.Id`	`childId`	the `Id` of the new child
Errors	NOT_FOUND		`activityId` not a parent of `childId`
	NULL_ARGUMENT		`activityId` or `childId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	removeChildActivities
Description	Removes all children from an activity.
Parameters	`osid.id.Id`	`activityId`	the `Id` of an activity
Errors	NOT_FOUND		`activityId` not found
	NULL_ARGUMENT		`activityId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.