EdmiError edmiRemoteGetMethodSignatureBN(SdaiServerContext serverContextId,
                                          SdaiString        methodType,
                                          SdaiString        methodName,
                                          SdaiString        schemaName,
                                          SdaiInstance      *methodId,
                                          SdaiString        *methodClass,
                                          SdaiInteger       *arguments,
                                          SdaiPrimitiveType *returnValueDatatype,
                                          SdaiInstance      *returnValueDomainId,
                                          SdaiString        **argumentNames,
                                          SdaiPrimitiveType **argumentDatatypes,
                                          SdaiInstance      **argumentDomainIds,
                                          SdaiString        *description,
                                          SdaiString        *textualSignature,
                                          SdaiInvocationId  *edmiInvocationId);

Reads the additional information / documentation of a method, identified by its methodId, in a remote EDMdatabase. The purpose of the user defined method signatures is to provide information about the methods and their input parameters to the users. The methods in question are Express-X mapping schemas and query functions.

Arguments

Type	Name	Comment
SdaiServerContext	serverContextId	Context identification, from edmiDefineServerContext
SdaiInstance	methodId	The instance Id of that uniquely identifies the method in the remote EDMdatabase. This Id is an instance of the EDM_METHOD entity in the ExpressDataManager model.
SdaiString	methodType	Variable that will receive the type of method. Values are: "XPX" if the method is an Express-X Schema Map. "QEX" if the method is a Query Function.
SdaiString	methodName	Variable that will receive the name that was assigned to the method when it was defined with edmiRemoteDefineMethodSignature. If the method is a Query Function, the method name will be the name of the query function it self.
SdaiString	schemaName	If the method is an Express-X Schema Map, this variable will receive the name of the mapping schema. If the method is a query function, the variable will receive the name of the query schema containing the query in question, qualified with the name of the parent Express schema. E.g: "MySchema.MyQuerySchema"
SdaiString	methodClass	Variable that will receive the optional and user defined method class. Method classification may be used to organize methods in the EDMdatabase
SdaiInteger	arguments	This variable will receive the number of input parameters for the given method.
SdaiPrimitiveType	returnValueDatatype	Variable that will receive the type of the return value from the method. This parameter is only applicable for query function methods.
SdaiInstance	returnValueDomainId
SdaiString	argumentNames	A buffer that will receive a null terminated list of input parameter names.
SdaiPrimitiveType	argumentDatatypes	A buffer that will receive a list of the input parameter types that correspond to the argument names in <argumentNames>
SdaiInstance	argumentDomainIds
SdaiString	description	Variable that will receive the user defined description of the method.
SdaiString	textualSignature	Optional, method signature in text.
SdaiInvocationId	edmiInvocationId	Currently not used.

Return Value

Error rendering macro 'excerpt-include' : User 'null' does not have permission to view the page 'US:_r_EDMInterface'.

Options

Example

 EdmiError rstat;
 SdaiInteger nErr, nWrn;
 SdaiServerContext myContext;
  
 /* Define Remote Server Context */
 rstat = edmiDefineServerContext("MyRemoteServerContext",
 "Johnny", "Supervisor", "cf37ftr", 
 "TCP", "9090", "MyServerHost", 
 NULL, NULL, NULL, NULL, NULL, &myContext); 
  
 /* Define Schemas */
 rstat = edmiRemoteDefineSchema(myContext, EXPRESS_SCHEMA_TYPE,
 "c:/data/person.exp", "c:/temp/person.dia", "Person", 
 DELETING_EXISTING_SCHEMAS | STORING_SOURCE, 
 &nWrn, &nErr, NULL); 
  
 rstat = edmiRemoteDefineSchema(myContext, EXPRESS_X_SCHEMA_TYPE,
 "c:/data/person_maps.xpx", "c:/temp/person_maps.dia", 
 "InsertPerson", DELETING_EXISTING_SCHEMAS | STORING_SOURCE, 
 &nWrn, &nErr, NULL); 
  
 rstat = edmiRemoteDefineSchema(myContext, QUERY_SCHEMA_TYPE,
 "c:/data/person_queries.xpx", "c:/temp/person_queries.dia", 
 "queries", DELETING_EXISTING_SCHEMAS | STORING_SOURCE, 
 &nWrn, &nErr, NULL); 
  
 /* Define XPX Method Signature */
 {
 SdaiString _parNamesXpx[4] = {"Name", "Sex", "Weight", NULL}; 
 SdaiPrimitiveType _parTypesXpx[3] = {sdaiSTRING, sdaiINTEGER, sdaiREAL}; 
  
 rstat = edmiRemoteDefineMethodSignature(myContext, "XPX", 
 "Insert a Person", "InsertPerson",  
 "CLASS_INPUT", _parNamesXpx, _parTypesXpx, 
 "Inserts a new person", NULL); 
 }
  
 /* Get QEX Method Signature */
 {
 SdaiInstance _qexMethodId; 
 SdaiString _qexMethodClass, _qexDesc, *_qexArgNames;  
 SdaiPrimitiveType _qexReturnType, *_qexArgTypes; 
 SdaiInteger _nArgs; 
  
 rstat = edmiRemoteGetMethodSignatureBN(myContext, "QEX", 
 "SexHeavierThan", "Person.Queries", 
 &_qexMethodId, &_qexMethodClass,  
 &_nArgs, &_qexReturnType, &_qexArgNames, 
 &_qexArgTypes, &_qexDesc, NULL); 
 }
  
 /* Modify QEX Method Signature */
 rstat = edmiRemoteModifyMethodSignature(myContext, "QEX",
 "SexHeavierThan", "Person.Queries", "CLASS_OUTPUT", 
 NULL, NULL, "Returns all persons of a given sex \ 
 exceeding a given threshold weight", NULL); 
  
 /* List Query Method Signatures */
 {
 SdaiString _typeFilter = "method_type = QEX"; 
 SdaiString _nameFilter = "name LIKE 'SEX*'"; 
 SdaiString _schemaFilter = "name = 'PERSON'"; 
 SdaiString _extraSchemaFilter = "name = 'QUERIES'"; 
 SdaiString _classFilter = "class = 'CLASS_OUTPUT'"; 
 SdaiString _ownerFilter = NULL; 
 SdaiString _groupFilter = NULL; 
 SdaiString *_methodNames = NULL; 
  
 rstat = edmiRemoteListMethodSignatures(myContext, _typeFilter,  
 _nameFilter, _schemaFilter, _extraSchemaFilter, 
 _classFilter, _ownerFilter, _groupFilter, 0,  
 &_methodNames, NULL); 
  
 while(*_methodNames) { 
 printf("\nMethod %s", *_methodNames); 
 ++_methodNames; 
 } 
 }
 . . .
  
 Express Schema
 - --------------------------------------------------------------
 - File : c:/data/person.exp
 - --------------------------------------------------------------
 SCHEMA person;
 ENTITY aperson;
 name : STRING;
 sex : STRING;
 weight : REAL;
 END_ENTITY;
 END_SCHEMA;
  
 Express-X Schema
 - --------------------------------------------------------------
 - File : c:/data/person_maps.xpx
 - --------------------------------------------------------------
 SCHEMA_MAP InsertPerson;
 GLOBAL
 DECLARE src INSTANCE OF SOURCE_SCHEMA person;
 DECLARE tar INSTANCE OF TARGET_SCHEMA person;
 END_GLOBAL;
  
 STATEMENTS;
 LOCAL
 npar : INTEGER;
 fail : BOOLEAN := FALSE;
 name : STRING;
 sex : INTEGER;
 weight : REAL;
 parType : INTEGER;
 END_LOCAL;
  
 IF (xpxGetNumberOfUserParameters() = 3) THEN
 xpxGetUserParameter(1, name);
 xpxGetUserParameter(2, sex);
 xpxGetUserParameter(3, weight);
 xpxCreateInstanceAndPutAttrsBN(XPXTARGETMODELID, "aperson", 3,
 xpxSTRING, name, xpxINTEGER, sex, xpxREAL, weight);
 }
 END_STATEMENTS;
 END_SCHEMA_MAP;
  
 Query Schema.
 - --------------------------------------------------------------
 - File : c:/data/person_queries.qex
 - --------------------------------------------------------------
 QUERY_SCHEMA queries FOR person;
 GLOBAL
 DECLARE src INSTANCE OF person;
 END_GLOBAL;
  
 VIEW_ENTITY PersonView;
 name : STRING;
 sex : INTEGER;
 weight : REAL;
 END_VIEW_ENTITY;
  
 QUERY_FUNCTION SexHeavierThan ( p_sex:INTEGER; p_weight:REAL)
 : SET OF PersonView;
 LOCAL
 result : SET of PersonView;
 currView : PersonView;
 END_LOCAL;
  
 FROM(s:src::aperson)
 WHEN TRUE;
 BEGIN
 IF((s.sex = p_sex) AND (s.weight > p_weight)) THEN
 NEW currView;
 currView.name := s.name;
 currView.sex := s.sex;
 currView.weight := s.weight;
 result ++ currView;
 END_IF;
 END;
 RETURN(result);
 END_QUERY_FUNCTION;
 END_QUERY_SCHEMA;

Arguments

Return Value

Options

Example

See also

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