in asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/records/RecordAddFieldsDescriptor.java [99:274]
public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
return new IScalarEvaluatorFactory() {
private static final long serialVersionUID = 1L;
@Override
public IScalarEvaluator createScalarEvaluator(final IEvaluatorContext ctx) throws HyracksDataException {
final PointableAllocator allocator = new PointableAllocator();
final IVisitablePointable vp0 = allocator.allocateRecordValue(inRecType);
final IVisitablePointable vp1 = allocator.allocateListValue(inListType);
final IPointable argPtr0 = new VoidPointable();
final IPointable argPtr1 = new VoidPointable();
final IScalarEvaluator eval0 = args[0].createScalarEvaluator(ctx);
final IScalarEvaluator eval1 = args[1].createScalarEvaluator(ctx);
final ArrayBackedValueStorage fieldNamePointable = new ArrayBackedValueStorage();
final ArrayBackedValueStorage fieldValuePointer = new ArrayBackedValueStorage();
final PointableHelper pointableHelper = new PointableHelper();
pointableHelper.serializeString("field-name", fieldNamePointable, true);
pointableHelper.serializeString("field-value", fieldValuePointer, true);
return new IScalarEvaluator() {
public static final int TABLE_FRAME_SIZE = 32768; // the default 32k frame size
public static final int TABLE_SIZE = 100; // the default 32k frame size
private final RecordBuilder recordBuilder = new RecordBuilder();
private final RuntimeRecordTypeInfo requiredRecordTypeInfo = new RuntimeRecordTypeInfo();
private final IBinaryHashFunction putHashFunc =
ListItemBinaryHashFunctionFactory.INSTANCE.createBinaryHashFunction();
private final IBinaryHashFunction getHashFunc =
ListItemBinaryHashFunctionFactory.INSTANCE.createBinaryHashFunction();
private final BinaryEntry keyEntry = new BinaryEntry();
private final BinaryEntry valEntry = new BinaryEntry();
private final IVisitablePointable tempValReference = allocator.allocateEmpty();
private final IBinaryComparator cmp =
ListItemBinaryComparatorFactory.INSTANCE.createBinaryComparator();
private BinaryHashMap hashMap =
new BinaryHashMap(TABLE_SIZE, TABLE_FRAME_SIZE, putHashFunc, getHashFunc, cmp);
private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();
private DataOutput out = resultStorage.getDataOutput();
@Override
public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
resultStorage.reset();
recordBuilder.reset(outRecType);
requiredRecordTypeInfo.reset(outRecType);
eval0.evaluate(tuple, argPtr0);
eval1.evaluate(tuple, argPtr1);
if (PointableHelper.checkAndSetMissingOrNull(result, argPtr0, argPtr1)) {
return;
}
// Make sure we get a valid record
byte typeTag0 = argPtr0.getByteArray()[argPtr0.getStartOffset()];
if (typeTag0 != ATypeTag.SERIALIZED_RECORD_TYPE_TAG) {
throw new TypeMismatchException(sourceLoc, getIdentifier(), 0, typeTag0,
ATypeTag.SERIALIZED_RECORD_TYPE_TAG);
}
// Make sure we get a valid list
byte typeTag1 = argPtr1.getByteArray()[argPtr1.getStartOffset()];
if (typeTag1 != ATypeTag.SERIALIZED_ORDEREDLIST_TYPE_TAG) {
throw new TypeMismatchException(sourceLoc, getIdentifier(), 1, typeTag1,
ATypeTag.SERIALIZED_ORDEREDLIST_TYPE_TAG);
}
vp0.set(argPtr0);
vp1.set(argPtr1);
ARecordVisitablePointable recordPointable = (ARecordVisitablePointable) vp0;
AListVisitablePointable listPointable = (AListVisitablePointable) vp1;
// Initialize our hashmap
int tableSize = recordPointable.getFieldNames().size() + listPointable.getItems().size();
// Construct a new hash table only if table size is larger than the default
// Thus avoiding unnecessary object construction
if (hashMap == null || tableSize > TABLE_SIZE) {
hashMap = new BinaryHashMap(tableSize, TABLE_FRAME_SIZE, putHashFunc, getHashFunc, cmp);
} else {
hashMap.clear();
}
addFields(recordPointable, listPointable);
recordBuilder.write(out, true);
result.set(resultStorage);
}
private void addFields(ARecordVisitablePointable inputRecordPointer,
AListVisitablePointable listPointable) throws HyracksDataException {
List<IVisitablePointable> inputRecordFieldNames = inputRecordPointer.getFieldNames();
List<IVisitablePointable> inputRecordFieldValues = inputRecordPointer.getFieldValues();
List<IVisitablePointable> inputFields = listPointable.getItems();
IVisitablePointable namePointable = null;
IVisitablePointable valuePointable = null;
int numInputRecordFields = inputRecordFieldNames.size();
try {
// Add original record without duplicate checking
for (int i = 0; i < numInputRecordFields; ++i) {
IVisitablePointable fnp = inputRecordFieldNames.get(i);
IVisitablePointable fvp = inputRecordFieldValues.get(i);
int pos = requiredRecordTypeInfo.getFieldIndex(fnp.getByteArray(),
fnp.getStartOffset() + 1, fnp.getLength() - 1);
if (pos >= 0) {
recordBuilder.addField(pos, fvp);
} else {
recordBuilder.addField(fnp, fvp);
}
keyEntry.set(fnp.getByteArray(), fnp.getStartOffset(), fnp.getLength());
valEntry.set(fvp.getByteArray(), fvp.getStartOffset(), fvp.getLength());
hashMap.put(keyEntry, valEntry);
}
// Get the fields from a list of records
for (int i = 0; i < inputFields.size(); i++) {
if (!PointableHelper.sameType(ATypeTag.OBJECT, inputFields.get(i))) {
throw new AsterixException("Expected list of record, got "
+ PointableHelper.getTypeTag(inputFields.get(i)));
}
List<IVisitablePointable> names =
((ARecordVisitablePointable) inputFields.get(i)).getFieldNames();
List<IVisitablePointable> values =
((ARecordVisitablePointable) inputFields.get(i)).getFieldValues();
// Get name and value of the field to be added
// Use loop to account for the cases where users switches the order of the fields
IVisitablePointable fieldName;
for (int j = 0; j < names.size(); j++) {
fieldName = names.get(j);
// if fieldName is "field-name" then read the name
if (PointableHelper.byteArrayEqual(fieldNamePointable, fieldName)) {
namePointable = values.get(j);
} else { // otherwise the fieldName is "field-value". Thus, read the value
valuePointable = values.get(j);
}
}
if (namePointable == null || valuePointable == null) {
throw new InvalidDataFormatException(sourceLoc, getIdentifier(),
"fields to be added");
}
// Check that the field being added is a valid field
int pos = requiredRecordTypeInfo.getFieldIndex(namePointable.getByteArray(),
namePointable.getStartOffset() + 1, namePointable.getLength() - 1);
keyEntry.set(namePointable.getByteArray(), namePointable.getStartOffset(),
namePointable.getLength());
// Check if already in our built record
BinaryEntry entry = hashMap.get(keyEntry);
if (entry != null) {
tempValReference.set(entry.getBuf(), entry.getOffset(), entry.getLength());
// If value is not equal throw conflicting duplicate field, otherwise ignore
if (!PointableHelper.byteArrayEqual(valuePointable, tempValReference)) {
throw new RuntimeDataException(ErrorCode.DUPLICATE_FIELD_NAME, getIdentifier());
}
} else {
if (pos > -1) {
recordBuilder.addField(pos, valuePointable);
} else {
recordBuilder.addField(namePointable, valuePointable);
}
valEntry.set(valuePointable.getByteArray(), valuePointable.getStartOffset(),
valuePointable.getLength());
hashMap.put(keyEntry, valEntry);
}
}
} catch (AsterixException e) {
throw HyracksDataException.create(e);
}
}
};
}
};
}