public <T> T findAndModify(
Query<T> query, UpdateOperations<T> ops, boolean oldVersion, boolean createIfMissing) {
QueryImpl<T> qi = (QueryImpl<T>) query;
DBCollection dbColl = qi.getCollection();
// TODO remove this after testing.
if (dbColl == null) dbColl = getCollection(qi.getEntityClass());
if (log.isTraceEnabled())
log.info("Executing findAndModify(" + dbColl.getName() + ") with update ");
DBObject res =
dbColl.findAndModify(
qi.getQueryObject(),
qi.getFieldsObject(),
qi.getSortObject(),
false,
((UpdateOpsImpl<T>) ops).getOps(),
!oldVersion,
createIfMissing);
if (res == null) return null;
else return (T) mapr.fromDBObject(qi.getEntityClass(), res, createCache());
}
@SuppressWarnings("rawtypes")
public <T> MapreduceResults<T> mapReduce(
MapreduceType type,
Query query,
String map,
String reduce,
String finalize,
Map<String, Object> scopeFields,
Class<T> outputType) {
Assert.parametersNotNull("map", map);
Assert.parameterNotEmpty(map, "map");
Assert.parametersNotNull("reduce", reduce);
Assert.parameterNotEmpty(reduce, "reduce");
QueryImpl<T> qi = (QueryImpl<T>) query;
DBCollection dbColl = qi.getCollection();
// TODO remove this after testing.
if (dbColl == null) dbColl = getCollection(qi.getEntityClass());
if (log.isTraceEnabled())
log.info(
"Executing mapReduce("
+ dbColl.getName()
+ ") with query("
+ qi.toString()
+ ") map("
+ map
+ ") reduce("
+ reduce
+ ") finalize("
+ finalize
+ ") scope("
+ scopeFields
+ ")");
// TODO replace this with the 2.4 driver impl.
String outColl = mapr.getCollectionName(outputType);
BasicDBObjectBuilder bldr =
BasicDBObjectBuilder.start("mapreduce", mapr.getCollectionName(qi.getEntityClass()));
switch (type) {
case REDUCE:
bldr.push("out").add("reduce", outColl).pop();
break;
case MERGE:
bldr.push("out").add("merge", outColl).pop();
break;
case INLINE:
bldr.push("out").add("inline", 1).pop();
break;
default:
bldr.add("out", outColl);
break;
}
if (qi.getOffset() != 0 || qi.getFieldsObject() != null)
throw new QueryException(
"mapReduce does not allow the offset/retrievedFields query options.");
if (qi.getQueryObject() != null) bldr.add("query", qi.getQueryObject());
if (qi.getLimit() > 0) bldr.add("limit", qi.getLimit());
if (qi.getSortObject() != null) bldr.add("sort", qi.getSortObject());
bldr.add("map", map);
bldr.add("reduce", reduce);
if (finalize != null && finalize.length() > 0) bldr.add("finalize", finalize);
if (scopeFields != null && scopeFields.size() > 0)
bldr.add("scope", mapr.toMongoObject(null, null, scopeFields));
DBObject dbObj = bldr.get();
CommandResult cr = dbColl.getDB().command(dbObj);
cr.throwOnError();
MapreduceResults mrRes =
(MapreduceResults) mapr.fromDBObject(MapreduceResults.class, cr, createCache());
QueryImpl baseQ = null;
if (!MapreduceType.INLINE.equals(type))
baseQ = new QueryImpl(outputType, db.getCollection(mrRes.getOutputCollectionName()), this);
// TODO Handle inline case and create an iterator/able.
mrRes.setBits(type, baseQ);
return mrRes;
}