edmiVersionGetAttrDatatype

EdmiError edmiVersionGetAttrDatatype(SdaiInstance      instance,
                                      SdaiVersion       version,
                                      SdaiAttr          attributeId, 
                                      SdaiPrimitiveType *datatype);

Returns the primitive data type of a value stored in an attribute of a given application instance within a model version other than the current.

Arguments

Type	Name	Comment
SdaiInstance	instance	The instanceID of an application instance in the edmModel for which the data type of the actual stored data in a given attribute shall be checked for an earlier version of the model.
SdaiVersion	version	The version number of the edmModel in question. The version number is a sequence number counting from one with an increment of one for each new model version created.
SdaiAttr	attributeId	A numeric attributeID that uniquely identifies the attribute definition instance in the EDMdatabase. The attributeID is returned from the sdaiGetAttrDefinition and sdaiGetAttrDefinitionBN functions.
SdaiPrimitiveType	datatype	Address of a variable that will receive the primitive type of the data stored in the given attribute of <instance> for the <version> of the edmModel.

Return Value

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Options

Example

 EdmiError rstat;
 SdaiInteger nWrn, nErr;
 SdaiRepository repId;
 SdaiModel modelId;
 SdaiVersion version1Id, version2Id;
 SdaiModelVersion modelVersionId;
 SdaiInteger myInteger;
 SdaiReal myReal;
 SdaiInstance instId;
 SdaiAttr attrId;
 SdaiPrimitiveType type;
  
 /* Compile schema */
 rstat = edmiCompileFile("c:/data/MyFile.exp",
 "c:/tmp/MyFile.dia", 
 "MySchema", 0, &nWrn, &nErr); 
 /* Create Model */
 rstat = edmiGetRepository("MyRepository", &repId);
 modelId = edmiCreateModelBN(repId, "MyModel", "MySchema", 0);
 /* Populate Model */
 instId = edmiCreateInstanceAndPutAttrsBN(modelId, "MyEntity", 1,
 "REAL_ATTR", sdaiREAL, 3.14);  
 /* Create version 1 */
 rstat = edmiCreateModelVersion("MyRepository", "MyModel",
 "V1", &modelVersionId); 
 /* Change population */
 sdaiPutAttrBN(instId, "REAL_ATTR", sdaiINTEGER, 1);
 /* Create version 2 */
 rstat = edmiCreateModelVersion("MyRepository", "MyModel",
 NULL, &modelVersionId); 
 /* Get Id of version 1 */
 rstat = edmiGetModelVersionIdBN("MyRepository", "MyModel",
 "V1", &modelVersionId, &version1Id); 
 /* Type is sdaiREAL */
 rstat = edmiVersionGetAttrDatatypeBN(instId, version1Id,
 "REAL_ATTR", &type);
 /* Value is 3.14 */ 
 if (type != sdaiREAL) goto error;
 rstat = edmiVersionGetAttrBN(instId, version1Id, "REAL_ATTR",
 type, &myReal); 
 /* Get Id of version 2 */
 attrId = sdaiGetAttrDefinitionBN("MySchema", "MyEntity", "REAL_ATTR");
 rstat = edmiGetModelVersionId(modelId, "version2",
 &modelVersionId, &version2Id); 
 /* Type is now sdaiINTEGER */
 rstat = edmiVersionGetAttrDatatype(instId, version2Id,
 attrId, &type); 
 /* Value is 1 */
 if (type != sdaiINTEGER) goto error;
 rstat = edmiVersionGetAttr(instId, version2Id, attrId,
 type, &myInteger);
 /* Roll back to version 1 */
 rstat = edmiRollbackModel(modelId, version1Id,
 KEEP_ALL_MODEL_VERSIONS); 
 /* Delete version 2 */
 edmiDeleteModelVersion(modelId, version2Id);
 error:
 . . .

EDMsix

edmiVersionGetAttrDatatype

Arguments

Return Value

Options

Example

See also

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