RXS_GetJsonStringLen()

This subprocedure is used to calculate the length of a JSON string that has been composed by RXS_CreateJson() and the other JSON composition subprocedures.

Subprocedure Prototype

IBM i 7.1+

`D RXS_GetJsonStringLen... D PR 10U 0 Extproc('RXS_GetJsonStringLen') D Opdesc`
`D pCreateJsonDS LikeDS(RXS_CreateJsonDS_t) D Options(*Varsize)`	The CreateJson data structure where the JSON data is being composed. This is the data structure that was specified in the first parameter when RXS_CreateJson() was called.

Example Code

IBM i 7.1+

Example 1: Get length of JSON string in memory

*--------------------------------------------------------------
* This example creates a simple JSON object, adds a string data
* field to it, and retrieves the length of the string in 
* memory.
*--------------------------------------------------------------
H DFTACTGRP(*NO) BNDDIR('RXSBND') ACTGRP(*CALLER)

 /copy QRPGLECPY,RXSCB

D JsonLen         S             10U 0

D CreateJsonDS    DS                  LikeDS(RXS_CreateJsonDS_t)
D RootDS          DS                  LikeDS(RXS_JsonStructureDS_t)
 /free
   RXS_ResetDS( CreateJsonDS : RXS_DS_TYPE_CREATEJSON );
   RXS_ResetDS( RootDS : RXS_DS_TYPE_JSONSTRUCTURE );
   
   CreateJsonDS.JsonStructureType = RXS_JSON_STRUCTURE_OBJECT;
   RootDS = RXS_CreateJson( CreateJsonDS );

   RXS_ComposeJsonString( 'hello' : 'world' : RootDS );
   // Composed JSON looks like: {"hello":"world"}

   JsonLen = RXS_GetJsonStringLen( CreateJsonDS );
   // JsonLen is: 17
   
   RXS_DestroyJson( CreateJsonDS );

   *INLR = *ON;
 /end-free

Data Structures

RXS_CreateJsonDS_t

`D RXS_CreateJsonDS_t... D DS Qualified Template Inz`
`D ReturnedErrorInfo... D LikeDS(RXS_ReturnedErrorInfoDS_t) Inz`
`D DataStructureType... D 5I 0 Inz(RXS_DS_TYPE_CREATEJSON)`	Internal use only
`D OnErrorMessageType... D 5I 0`
`D Prettify N Inz(RXS_NO)`	If set to RXS_YES, JSON retrieved with RXS_GetJsonString() will be formatted with whitespace to be "pretty" and more human readable. If set to RXS_NO, JSON will be returned in a compact form with as little whitespace as possible. Valid Values: `RXS_YES` `RXS_NO` Default Value: `RXS_NO`
`D JsonStructureType... D N Inz(RXS_JSON_STRUCTURE_OBJECT)`	If set to RXS_JSON_STRUCTURE_OBJECT, the JSON document being created will begin with a root JSON object. If set to RXS_JSON_STRUCTURE_ARRAY, it will begin with a root JSON array. Valid Values: `RXS_JSON_STRUCTURE_OBJECT` `RXS_JSON_STRUCTURE_ARRAY` Default Value: `RXS_JSON_STRUCTURE_OBJECT`
`D JsonStructurePtr... D * Inz(*Null)`	Internal use only
`D InputCcsid... D 10I 0 Inz(RXS_CCSID_JOB)`	Specifies the CCSID of the data being passed into the JSON composition subprocedures. Default is job CCSID. Default Value: `RXS_CCSID_JOB`
`D OutputCcsid... D 10I 0 Inz(RXS_CCSID_JOB)`	Specifies the CCSID that the JSON will be output as from RXS_GetJsonString(). Default is job CCSID. Default Value: `RXS_CCSID_JOB`
`D TrimVariables... D N Inz(RXS_NO)`	Determines whether to trim leading and trailing spaces from each value passed to RXS_ComposeJsonString() (RXS_YES), or to leave all spaces in place (RXS_NO). Valid Values: `RXS_YES` `RXS_NO` Default Value: `RXS_NO`