Webui Classes and interface

CLASSES

CL_CRM_BOL_CORE

            This class creates an instance of business object layer (Component Set). This class follows singleton design pattern. The BOL Core is the central service provider for API classes and it communicates with underlying business object implementation.

·         START_UP: It takes the name of component set that to be started and starts the BOL. It takes one more parameter IV_DISPLAY_MODE_SELECT which is optional and set to ABAP_FALSE by default. This means BOL follows optimistic lock which makes all objects changeable in user interface even without a lock. The lock is automatically requested on first attempt of change.

·         GET_ENTITY_FACTORY: Get factory handler for business object.

CL_CRM_BOL_QUERY_SERVICE

            Used to select bol entity.

·         GET_INSTANCE: Get the instance.

·         SET_PROPERTY: Set a search criterion.

·         GET_QUERY_RESULT: This method is used to execute the query and returns the result of type if_bol_entity_col.

CL_CRM_BOL_DQUERY_SERVICE

            This class is used for advanced query search using greater than, lesser than, multiple search patterns, saved searches (save and retrieve).

·         SET_QUERY_PARAMETERS: Setting the query parameter for maximum hits.

·         ADD_SELECTION_PARM: Adding selection criteria. It takes 4 parameters.

·         GET_QUERY_RESULT: This method is used to execute the query and returns the result of type if_bol_entity_col.

·         SAVE_QUERY_AS_TEMPLATE: Save query as template using query id.

·         LOAD_QUERY_AS_TEMPLATE: Load the query from template using query id.

CL_CRM_BOL_ENTITY

            This class is used to access the entities which implements business objects.

·         GET_RELATED_ENTITIES: Gets a list of 1:N related entities for particular attributes.

·         CREATE_RELATED_ENTITIES: For creating child objects.

CL_CRM_BOL_COL

            This class is used to hold all the instances implementing the standard property access interface IF_BOL_BO_PROPERTY_ACCESS.

CL_CRM_BOL_ENTITY_COL

            This holds regular BOL entities only.

CL_CRM_BOL_ENTITY_FACTORY

·         CREATE: For creating root entity.

CL_BSP_DLC_VIEW_DESCRIPTOR

            This class is used to describe the property of attributes such as changing to dropdown list, checkbox, link, radio, oca, etc.

INTERFACES

IF_BOL_TRANSACTION_CONTEXT

            This interface Controls transactional behavior such as modify, create, delete entities. It has three types of transaction, one is global transaction context which holds all modified root entities, next is fine granular transaction context exists for each root object instance and last is custom transaction context.

·         SAVE: Save the changes.

·         COMMIT: Commit the changes.

IF_BOL_BO_COL

            Provides collection to hold business objects (BO).

IF_BOL_ENTITY_COL_ITERATOR

·         GET_FIRST: Gets the first entity from collection wrapper.

·         GET_NEXT: Gets the next entity from collection wrapper.

IF_BOL_BO_PROPERTY_ACCESS

            This interface is used to access the properties of BOL entities and query services. The classes CL_CRM_BOL_ENTITY and CL_CRM_BOL_QUERY_SERVICE inherits this interface.

·         GET_PROPERTY_AS_STRING

·         SET_PROPERTY

Difference Between Append Structure and Include Structure

Difference Between Append Structure and Include Structure

1. Append Structure is a mechanism of adding extra fields to the Standard Table. Where as, Include Structure is a mechanism of adding extra fields to the Custom Table.


2. Append Structure adds fields at the last of the Standard Table. Where as, Include Structure adds fields at any position.


3. Append Structure can only be used once.(i.e. If we add an append structure to a Standard Table, the same Structure can't be appended to the another Standard table). Where as, Include Structure can for Multiple Tables. (i.e. If we include structure to the custom table using include structure, the same structure can be included in any other Custom Tables).


Append Structure & Include Structure can also be used to add new fields or extra fields to the structures. (i.e. Using Append Structure, we can add a structure to a standard structure, which will add the fields at the end of the structure. Include Structure can be included in any custom structure at any position).

Note :
1. It is not possible to add or to append or to include a table to a structure.
2. We can't append a structure to a sap table which has the fields with data type VARC, LCHR RAW & LRAW.(i.e. all the fields with the above specified data types should be always be as the last fields in the data base table. if we add an append structure to such table their comes the conflict b/w append structure and the long data types in sap table.

HYBRIS