IF_WD_CONTEXT_NODE_INFO (SAP Library

IF_WD_CONTEXT_NODE_INFO

The interface IF_WD_CONTEXT_NODE_INFO is the interface of the metadata of a Structure link Context node and is used to describe what the data looks like.

Each context node contains a reference to a node info that contains the metadata. Below is the most important metadata that can be accessed using IF_WD_CONTEXT_NODE_INFO:

· Name (GET_NAME)

· Singleton (IS_SINGLETON)

· Multiple node (IS_MULTIPLE)

· Mandatory node (IS_MANDATORY)

· Mandatory selection (IS_MANDATORY_SELECTION)

· Multiple selection (IS_MULTIPLE_SELECTION)

GET Methods

The GET methods supply the attributes of a context node and child node, among others. The GET methods are used to retrieve the single components of a context node.

GET Methods

Method	Description
GET_ATTRIBUT GET_ATTRIBUTES	Retrieves one or all attributes
GET_CHILD_NODE GET_CHILD_NODES	Retrieves one or all child nodes
GET_ATTRIBUTE_VALUEHELP_TYPE	Retrieves the type of Input Help: The type may be, for example, an ABAP dictionary search help or an OVS input help.
GET_CONTROLLER	Retrieves the associated controller
GET_NAME	Retrieves the name of the context node
GET_PARENT	Retrieves the parent node of the respective context node
GET_STATIC_ATTRIBUTES_TYPE	Gets an RTTI instance for the node attributes that have been declared static. For more information about RTTI see the documentation for class CL_ABAP_TYPEDESCR in the system.
FOLLOW_PATH	Retrieves the whole path expression that you can use for separate calls to the target node. The separate node names are separated from each other with periods.

Note

Single components are retrieved using the respective name. Multiple components are retrieved using a table.

HAS/IS Methods

The HAS/IS methods are used to retrieve the different properties and statuses of a context node.

HAS/IS Methods

Method	Description
HAS_ATTRIBUTE_VALUE_HELP	Queries whether an input help is available for the context attribute
IS_CHILD_NODE_RECURSIVE	Queries whether the child node is recursive or not. See the relevant section under Context.
IS_FINALIZED	Establishes that the node information cannot be changed This corresponds to the Read-Only property in the development environment.
IS_INITIALIZE_LEAD_SELECTION	Establishes that the lead selection is automatically initialized by the runtime, that is, it is always set. This corresponds to the Initialization Lead Selection property in the development environment.
IS_MANDATORY IS_MULTIPLE	Determines the number of node elements. As a result these two methods establishes the Cardinality in the development environment (see also the relevant section in Context Node Properties). IS_MANDATORY ascertains that the current context node has at least one node element. IS_MULTIPLE ascertains that the current context node can have at least several node elements.
IS_MANDATORY_SELECTION IS_MULTIPLE_SELECTION	Determines the number of node elements that can be selected in view elements. These two methods determine the selection cardinality in the development environment. IS_MANDATORY_SELECTION determines that a node element must always be selected. IS_MULTIPLE_SELECTION determines that several node elements can be selected.
IS_MAPPING_COMPLETE	Determines whether mapping is complete.
IS_SINGLETON	Determines whether the context node is a singleton (see also the relevant section in Context Node Properties). So this method corresponds to the property Singleton in the development environment. A node with the property singleton exists at runtime only for the lead selection of the parent node. This allows the Web Dynpro runtime a context hierarchy with an optimized memory structure

ADD Methods

The ADD methods allows attributes of a context node or child node to be added.

ADD Methods

Method	Description
ADD_ATTRIBUTE	Adds an attribute. This corresponds to the context menu Create ® Attribute in the development environment.
ADD_CHILD_NODE	Adds a child node. This corresponds to the context menu Create ® Node.
ADD_NEW_CHILD_NODE	Creates an info object and adds it as a child node.
ADD_NEW_MAPPED_CHILD_NODE	Creates a mapped child node. If the mapping path is specified, it is a standard Mapping. If the path is initial, an externally mappable node needs to be defined. See also External Context Mapping. To complete the mapping, you also need to call the method SET_MAPPING_COMPLETE.
ADD_RECURSIVE_CHILD_NODE	Adds a recursive child node. This corresponds to the context menu Create ® Recursive Node in the development environment.

SET Methods

The SET methods allows attributes of a context node or child node to be set.

SET Methods

Method	Description
SET_ATTRIBUTE_VALUE_SET	Sets the fixed values of an attribute
SET_FINALIZED	Sets a property dynamically that cannot be set in the development environment: the node info can no longer be changed, it is constant.
SET_MAPPING_COMPLETE	Completes the definition of an externally mappable node. See also ADD_NEW_MAPPED_CHILD_NODE.

REMOVE Methods

The REMOVE methods allows attributes of a context node or child node to be deleted.

Note

Note that you cannot delete attributes that have been defined as static. You can only delete attributes that were created at runtime.

REMOVE Methods

Method	Description
REMOVE_ATTRIBUTE	Deletes an attribute
REMOVE_CHILD_NODE	Deletes a child node
REMOVE_DYNAMIC_ATTRIBUTES	Deletes all attributes of a context node