(De-)Serializing ref to data (using transitions?)

Hi all,
I'd like to use a simple transformation to serialize and deserialize a table, that contains a data reference. The table is defined like this:
types:
begin of my_row,
field type char10,
value type ref to data,
end of my row,
my_table type sorted table of my_row with unique key field.
Reference cannot be used directly, so <tt:copy ..> does not work. I tried <tt:assign ...>, but it leads into a syntax error.
Is there any comfortable way, to solve that problem? I mean I could use the ABAP RTTI and build an XML-file by myself, but that is a lot of more work to do .....
As always, any help is appreciated.
Nick

Hey Kamil,
You can use a field symbol to move the data like this:
data: dyn_struc type ref to data.
stat_struc type A.
field-symbols <fs> type data.
create data dyn_struc type A.
assign dyn_struc->* to <fs>.
stat_struc = <fs>.
Of course, this will only work if dyn_struc was actually created with type A. Otherwise, the last line will cause a runtime error.
Best regards,
Erik

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Hello experts,
I have a structure with two fields, one string as name/ID and the second one REF TO DATA as placeholder for any value, so DATA can take for example another string or a numeric value or whatever. Ok, now I want to handle this DATA based on it's type, which is unknown at that point. So I first DESCRIBE the field (its type). If for example this type results in a string, I want to move this string data from REF TO DATA into a local string value. Then I want to reformat the string value and save it again to the REF TO DATA field.
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Edited by: Thomas Zloch on Nov 5, 2010 9:42 AM - please use code tags

Hi,
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Hi Folks!
I got a little problem with moving data.
I'm using ref to data for a general data definition. Unfortunately after I create the data using a certain type, let's say 'A', I cant move the data of the created data to a structure of type 'A'. (It can also be type 'B'; that depends on the user input; thats why I am using ref to data).
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I'm looking forward to reading from you
Best Regards!

Hey Kamil,
You can use a field symbol to move the data like this:
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Predefined ABAP Types
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Type Length Standard length Description
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In Unicode systems, the length must either be specified in characters and bytes. In non-Unicode systems, the length of a character is one byte, but in Unicode systems the length of a character depends on which Unicode character representation is used.
Generic ABAP Types
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Type Description
any Any data type (suitable for any type)
any table Internal table of any table type
c Text field of generic length
clike Character-type (c, d, n, t, string and character-type flat structures); in non- Unicode programs also x, xstring and any flat structures
csequence Text-type (c, string)
data Any data type
hashed table Hashed table
index table Index table
n numeric text of generic length
numeric Numeric (b, i, p, f, s)
object Any object type (root class of the inheritance hierarchy)
p Packed number of generic length and generic number of decimal places
simple Elementary data type including structured types with exclusively character-type flat components
sorted table Sorted table
Standard table Standard table
table Standard table
x Byte field of generic length
xsequence byte-type (x, xstring)
The genric types clike, csequence, numeric,simple, and xsequence are available as of release 6.10.
Notes
The generic type any currently has the same effect in typing as the generic type data. When declaring references, any cannot yest be specified after REF TO. Generic data references (REF TO data) or generic object references (REF TO object) are possible. The generic type object can currently only be specified after REF TO.
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Predefined Types in the ABAP Dictionary
The following table lists the predefined types in the ABAP Dictionary. These types cannot be used directly in ABAP programs, and are therefore known as external data types. Instead, they are used in the ABAP Dictionary for the definition of data types to which ABAP programs can refer. The predefined data types of the ABAP Dictionary must also be taken into account in Open SQL statements and when working with screens: Open SQL statements work with database tables defined in the ABAP Dictionary whose colums have external data types. Screen fields are also declared in the Screen Painter with reference to external data types.
Type Permitted Places m Meaning ABAP Type
ACCP 6 Accounting period n(6)
CHAR 1-255 Character string c(m)
CLNT 3 Client c(3)
CUKY 5 Currency key c(5)
CURR 1-31 Currency field p((m+1)/2)
DATS 8 Date d
DEC 1-31 Calculation/amount field p((m+1)/2)
FLTP 16 Floating point number f(8)
INT1 3 1 byte integer b
INT2 5 2 byte integer s
INT4 10 4 byte integer i
LANG 1 Language c(1)
LCHR 256-... Long character string c(m)
LRAW 256-... Long byte string x(m)
NUMC 1-255 numerischer Text n(m)
PREC 2 Accuracy of a quantity field s
QUAN 1-31 Quantity field p((m+1)/2)
RAW 1-255 Byte sequence x(m)
RAWSTRING 256-... Byte sequence xstring
SSTRING 1-255 Character string string
STRING 256-... Character string string
TIMS 6 Time t
UNIT 2-3 Unit key c(m)
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The types RAWSTRING and STRING have a variable length. A maximum length for these types can be specified, but has no upper limit.
The type SSTRING is available as of release 6.10 and it has a variable length. Its maximum length must be specified and is limited to 255. The advantage of this type compared with CHAR, is that it is assigned to the ABAP type string.
The table below shows the data types of the ABAP Dictionary that are based on the predefined types in the above table, and that can be addressed in an ABAP program. The elementary components of these data types are converted to predefined ABAP data types according to the final column in the above table, whereby the number of places m of each type is converted to lengths.
Data types in the ABAP Dictionary Data types in ABAP
Data element Elementary data type, Reference type
Structure, Database table, View Structured data type
Table type Table type
Note
As of release 6.20, a component of structures or database tables that has the type LANG can be identified as a text language. The text language is used for the conversion of character-type components of the structure when importing data from data clusters and for RFC between MDMP systems and Unicode systems.

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Refer this MSDN article for more info:http://msdn.microsoft.com/en-us/library/aa559527.aspx
If this answers your question please mark it accordingly. If this post is helpful, please vote as helpful by clicking the upward arrow mark next to my reply.

(De-)Serializing ref to data (using transitions?)

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