OSID - osid.financials.posting.PostBusinessAssignmentSession Service Interface Definition

Interface	osid.financials.posting.PostBusinessAssignmentSession
Implements	`osid.OsidSession`
Description	This session provides methods to re-assign `Posts` to `Business` objects A `Post` may appear in multiple `Business` objects and removing the last reference to a `Post` is the equivalent of deleting it. Each `Business` may have its own authorizations governing who is allowed to operate on it. Adding a reference of a `Post` to another `Business` is not a copy operation (eg: does not change its `Id` ).
Method	canAssignPosts
Description	Tests if this user can alter post/business mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known mapping methods in this session will result in a `PERMISSION_DENIED.` This is intended as a hint to an application that may opt not to offer assignment operations to unauthorized users.
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	canAssignPostToBusiness
Description	Tests if this user can alter post/business mappings. A return of true does not guarantee successful authorization. A return of false indicates that it is known mapping methods in this session will result in a `PERMISSION_DENIED.` This is intended as a hint to an application that may opt not to offer lookup operations to unauthorized users.
Parameters	`osid.id.Id`	`businessId`	the `Id` of the `Business`
Return	`boolean`		`false` if mapping is not authorized, `true` otherwise
Errors	NULL_ARGUMENT		`businessId` is `null`
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableBusinessIds
Description	Gets a list of businesses including and under the given business node in which any post can be assigned.
Parameters	`osid.id.Id`	`businessId`	the `Id` of the `Business`
Return	`osid.id.IdList`		list of assignable business `Ids`
Errors	NULL_ARGUMENT		`businessId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getAssignableBusinessIdsForPost
Description	Gets a list of businesses including and under the given business node in which a specific post can be assigned.
Parameters	`osid.id.Id`	`businessId`	the `Id` of the `Business`
Parameters	`osid.id.Id`	`postId`	the `Id` of the `Post`
Return	`osid.id.IdList`		list of assignable business `Ids`
Errors	NULL_ARGUMENT		`businessId` or `postId` is `null`
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	assignPostToBusiness
Description	Adds an existing `Post` to a `Business.`
Parameters	`osid.id.Id`	`postId`	the `Id` of the `Post`
Parameters	`osid.id.Id`	`businessId`	the `Id` of the `Business`
Errors	ALREADY_EXISTS		`postId` is already assigned to `businessId`
	NOT_FOUND		`postId` or `businessId` not found
	NULL_ARGUMENT		`postId` or `businessId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	unassignPostFromBusiness
Description	Removes a `Post` from a `Business.`
Parameters	`osid.id.Id`	`postId`	the `Id` of the `Post`
Parameters	`osid.id.Id`	`businessId`	the `Id` of the `Business`
Errors	NOT_FOUND		`postId` or `businessId` not found or `postId` not assigned to `businessId`
	NULL_ARGUMENT		`postId` or `businessId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.