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EdmiError edmiRemoteIsSubtypeOf(SdaiServerContext serverContextId,
SdaiEntity subtypeEntityId,
SdaiEntity supertypeEntityId,
SdaiBoolean *isSubtypeOf,
SdaiInvocationId *edmiInvocationId);
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Determines whether a specified instance type is a subtype of another specified instance type. This operation will return sdaiTRUE if the instance type specified by the <subtypeEntity> argument is the same or a subtype of the instance type specified by the <supertypeEntity> argument, else sdaiFALSE will be returned.
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Arguments
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| Type | Name | Comment |
| SdaiServerContext | serverContextId | Context identification, from edmiDefineServerContext |
| SdaiEntity | subtypeEntityId | The numeric entityID that uniquely identifies the assumed entity subtype within the the remote _EDMdatabase{_}.remote EDMdatabase |
| SdaiEntity | supertypeEntityId | The numeric entityID that uniquely identifies the assumed entity supertype within the the remote _EDMdatabase{_}.remote EDMdatabase |
| SdaiBoolean | isSubtypeOf | A variable that will receive sdaiTRUE if the entity <subtypeEntityId> is a subtype of the entity <supertypeEntityId>. |
| SdaiInvocationId | edmiInvocationId | Currently not used. |
Returns:
A completion code of datatype EdmiError is the returned function value. The completion code has the following values:
Completion code = 0 : Operation successfully performed.
Completion code != 0: Error in operation. Completion code is an _EDMinterface_ error code. Use edmiGetErrorText to get the error text corresponding to the error code.
Example:
/*
SCHEMA Relations
ENTITY Person;
PID : INTEGER;
Name : STRING;
END_ENTITY;
ENTITY Man SUBTYPE OF Person;
. . .
HasBeard : BOOLEAN;
. . .
END_ENTITY;
ENTITY Woman SUBTYPE OF Person;
. . .
HasGivenBirth : BOOLEAN;
. . .
END_ENTITY;
END_SCHEMA;
*/
EdmiError rstat;
SdaiInteger nWrn, nErr;
SdaiServerContext myContext;
SdaiEntity manEID, personEID;
SdaiBoolean isSubType;
SdaiModel modelId;
/* Define Remote Server Context */
rstat = edmiDefineServerContext("MyRemoteServerContext",
"Johnny", "Supervisor", "cf37ftr",
"TCP", "9090", "MyServerHost",
NULL, NULL, NULL, NULL, NULL, &myContext);
/* Compile the schema */
rstat = edmiRemoteDefineSchema(myContext, EXPRESS_SCHEMA_TYPE,
Return Value
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Options
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Example
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/* SCHEMA Relations ENTITY Person; PID : INTEGER; Name : STRING; END_ENTITY; ENTITY Man SUBTYPE OF Person; . . . HasBeard : BOOLEAN; . . . END_ENTITY; ENTITY Woman SUBTYPE OF Person; . . . HasGivenBirth : BOOLEAN; . . . END_ENTITY; END_SCHEMA; */ EdmiError rstat; SdaiInteger nWrn, nErr; SdaiServerContext myContext; SdaiEntity manEID, personEID; SdaiBoolean isSubType; SdaiModel modelId; /* Define Remote Server Context */ rstat = edmiDefineServerContext("MyRemoteServerContext", "Johnny", "Supervisor", "cf37ftr", "TCP", "9090", "MyServerHost", NULL, NULL, NULL, NULL, NULL, &myContext); /* Compile the schema */ rstat = edmiRemoteDefineSchema(myContext, EXPRESS_SCHEMA_TYPE, "c:/data/Relations.exp", "c:/tmp/Relations.dia", |
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"Relations", 0, &nWrn, &nErr, NULL); |
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/* Create the MyRelations model */ |
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rstat = edmiRemoteCreateModel(myContext, "JohnnysRepository", |
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"MyRelations", "Relations", 0, NULL); |
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/* Get the model Id */ |
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rstat = edmiRemoteGetModelBN(myContext, "JohnnysRepository", |
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"MyRelations", &modelId, NULL); |
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/* Get Man entity Id */ |
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rstat = edmiRemoteGetEntity(myContext, modelId, |
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"Man", &manEID, NULL); |
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/* Get Person entity Id */ |
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rstat = edmiRemoteGetEntity(myContext, modelId, |
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"Person", &personEID, NULL); |
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/* Is man subtype of person? */ |
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rstat = edmiRemoteIsSubtypeOf(myContext, |
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manEID, personEID, &isSubType, NULL); |
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printf("\nMan is%s subtype of person", |
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isSubType ? "" : "n't"); |
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. . . |
See also
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