ABAP运行时类型服务 Runtime Type Services (RTTS)

Class

RTTI methods

RTTC methods 　

Attirbutes

Comments

CL_ABAP_TYPEDESCR
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describe_by_data
describe_by_data_ref
describe_by_object_ref
describe_by_name

absolute_name
type_kind
length
decimals
kind

describe_by_name 可以获得DDIC对象的定义.
kind代表通用类型（元素，结构，表，引用，类，接口），而type_kind代表详细类型（character, string, flat structure, 等）

  |??CL_ABAP_DATADESCR
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is_instantiatable
is_read_only
applies_to_data
applies_to_data_ref
get_data_type_kind

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get_n
get_c
get_string
get_xstring
get_i
get_f
get_d
get_t
get_x
get_p

edit_mask
help_id
output_length

  |   |??CL_ABAP_REFDESCR
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get_referenced_type
get_ref_to_data
get_ref_to_object

create

对应"type ref to data"的变量，和"type ref to object"的对象

  |   |??CL_ABAP_COMPLEXDESCR

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get_components

create

struct_kind
components
has_include

  |       |??CL_ABAP_TABLEDESCR
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get_table_line_type

create

key
initial_size
key_defkind
has_unique_key
table_kind

  |??CL_ABAP_OBJECTDESCR
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interfaces
types
attributes
methods
events

      |??CL_ABAP_CLASSDESCR
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get_super_class_type
get_friend_types
get_class_name
is_shared_memory_enabled

class_kind
create_visibility

      |??CL_ABAP_INTFDESCR

get_interface_type
get_type
get_attribute_type
get_method_parameter_type
get_event_parameter_type

intf_kind