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EdmiError edmiRemoteFindAggrInstancesBN(SdaiServerContext serverContextId,
SdaiInstance instance,
SdaiString attributeName,
SdaiString condition,
SdaiInteger maxBufferSize,
SdaiInteger *index,
SdaiInteger *numberOfHits,
SdaiInstance *resultBuffer,
SdaiInvocationId *edmiInvocationId);
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Search a specified aggregate of instances in a remote edmModel for instances that match a specified condition. The condition must be a simple logical expression addressing only the simple type attribute values of the instance elements. A NULL or empty string condition will match all the aggregate elements.
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Each matching element will be identified by its aggregate element index. Note that even though the ISO10303 standard specifies no such thing as an internal ordering of the elements within the unordered bag and set type aggregate, the elements may still be indexed as long as the aggregates
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remain unchanged.
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The index of the first aggregate element to check, and the maximum number of matching element indexes to return, are specified as input arguments to the function. The actual number of matching elements returned and the index of the last returned matching element in the aggregate will be returned from the function. This makes it possible to query through huge aggregates by means of a loop where each iteration handles small subset of the total aggregate. See the example below.
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When the <maxBufferSize> argument is zero and the <resultBuffer> argument is NULL. Nothing but the number of matching aggregate elements will be returned.
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Arguments
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| Type | Name | Comment |
| SdaiServerContext | serverContextId | Context identification, from edmiDefineServerContext |
| SdaiInstance | instance | The numeric instanceID that uniquely identifies the instance in the remote _ EDMdatabase _ that owns the aggregate to be queried. |
| SdaiString | attributeName | Name of the attribute that owns the aggregate to be queried. Attribute names are case insensitive. The <attributeName> must be qualified with the name of the entity from which it was originally inherited if it is not unique within the Entity. |
| SdaiString | condition | The condition that the instances in the aggregate shall match. A NULL or empty string condition will match all the elements. The condition statement must be on the form "attribute = value" |
| SdaiInteger | maxBufferSize | The size of the buffer in which the indexes of all the matching aggregate elements will be returned. The number of returned indexes will never exceed this number. |
| SdaiInteger | index |
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| SdaiInteger | numberOfHits |
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| SdaiInstance | resultBuffer | A buffer, allocated by the calling application, that will receive the indexes of the matching aggregate elements. Use the <maxBufferSize> argument to prevent writing past the end of this buffer. |
| SdaiInvocationId | edmiInvocationId | Currently not used. |
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Return Value
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Options
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Example
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/*
SCHEMA Furniture
TYPE tScrewType = ENUMERATION OF (PHILIPS, ALLEN, FLAT); END_TYPE;
ENTITY screw;
ID : STRING;
TYPE : tScrewType;
LEN : REAL;
DIA : REAL;
END_ENTITY;
ENTITY dining_table;
Name : STRING;
Legs : INTEGER;
Length : REAL;
Width : REAL;
Height : REAL;
Screws : BAG OF screw;
END_ENTITY;
END_SCHEMA;
*/
#define S_BATCHSIZE 10
EdmiError rstat;
SdaiInteger nHits, index;
SdaiServerContext myContext;
SdaiInstance tableId;
SdaiQueryResult qexRes;
/* Create Server Context */
rstat = edmiDefineServerContext("MyContext",
"Johnny", "Supervisor", "cf37ftr",
"TCP", "9090", "MyServerHost",
NULL, NULL, NULL, NULL, NULL, &myContext);
/* Get the id of the dining table
with the unique name 'PIZA-210'
in the FURNITURE_DESIGN model. */
index = 0;
nHits = 1;
rstat = edmiRemoteSelectInstances(myContext, "DataRepository",
"FURNITURE_DESIGN", "DINING_TABLE", "NAME = 'PIZA-210'",
ONLY_INSTANCE_IDS, NULL, NULL, NULL,
&index, &nHits, &qexRes,
NULL, NULL, NULL, NULL);
tableId = qexRes->instanceIds[0];
edmiFreeQueryResult(qexRes);
/* Find the number of screws of type
Allen 5mm x 75mm used for the
dining table 'PIZA-210' */
index = 0;
nHits = 1000;
rstat = edmiRemoteFindAggrInstancesBN(myContext,
tableId, "SCREWS",
"(LEN=75) AND (DIA=5) AND (TYPE=ALLEN)",
0, &index, &nHits, NULL, NULL);
printf("\n%d screws of type Allen 5mm x 75mm used", &nHits);
. . . |
See also
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