in hudi-spark-datasource/hudi-spark3.1.x/src/main/scala/org/apache/spark/sql/avro/AvroDeserializer.scala [99:318]
def deserialize(data: Any): Option[Any] = converter(data)
/**
* Creates a writer to write avro values to Catalyst values at the given ordinal with the given
* updater.
*/
private def newWriter(avroType: Schema,
catalystType: DataType,
path: List[String]): (CatalystDataUpdater, Int, Any) => Unit =
(avroType.getType, catalystType) match {
case (NULL, NullType) => (updater, ordinal, _) =>
updater.setNullAt(ordinal)
// TODO: we can avoid boxing if future version of avro provide primitive accessors.
case (BOOLEAN, BooleanType) => (updater, ordinal, value) =>
updater.setBoolean(ordinal, value.asInstanceOf[Boolean])
case (INT, IntegerType) => (updater, ordinal, value) =>
updater.setInt(ordinal, value.asInstanceOf[Int])
case (INT, DateType) => (updater, ordinal, value) =>
updater.setInt(ordinal, dateRebaseFunc(value.asInstanceOf[Int]))
case (LONG, LongType) => (updater, ordinal, value) =>
updater.setLong(ordinal, value.asInstanceOf[Long])
case (LONG, TimestampType) => avroType.getLogicalType match {
// For backward compatibility, if the Avro type is Long and it is not logical type
// (the `null` case), the value is processed as timestamp type with millisecond precision.
case null | _: TimestampMillis => (updater, ordinal, value) =>
val millis = value.asInstanceOf[Long]
val micros = DateTimeUtils.millisToMicros(millis)
updater.setLong(ordinal, timestampRebaseFunc(micros))
case _: TimestampMicros => (updater, ordinal, value) =>
val micros = value.asInstanceOf[Long]
updater.setLong(ordinal, timestampRebaseFunc(micros))
case other => throw new IncompatibleSchemaException(
s"Cannot convert Avro logical type ${other} to Catalyst Timestamp type.")
}
// Before we upgrade Avro to 1.8 for logical type support, spark-avro converts Long to Date.
// For backward compatibility, we still keep this conversion.
case (LONG, DateType) => (updater, ordinal, value) =>
updater.setInt(ordinal, (value.asInstanceOf[Long] / MILLIS_PER_DAY).toInt)
case (FLOAT, FloatType) => (updater, ordinal, value) =>
updater.setFloat(ordinal, value.asInstanceOf[Float])
case (DOUBLE, DoubleType) => (updater, ordinal, value) =>
updater.setDouble(ordinal, value.asInstanceOf[Double])
case (STRING, StringType) => (updater, ordinal, value) =>
val str = value match {
case s: String => UTF8String.fromString(s)
case s: Utf8 =>
val bytes = new Array[Byte](s.getByteLength)
System.arraycopy(s.getBytes, 0, bytes, 0, s.getByteLength)
UTF8String.fromBytes(bytes)
case s: GenericData.EnumSymbol => UTF8String.fromString(s.toString)
}
updater.set(ordinal, str)
case (ENUM, StringType) => (updater, ordinal, value) =>
updater.set(ordinal, UTF8String.fromString(value.toString))
case (FIXED, BinaryType) => (updater, ordinal, value) =>
updater.set(ordinal, value.asInstanceOf[GenericFixed].bytes().clone())
case (BYTES, BinaryType) => (updater, ordinal, value) =>
val bytes = value match {
case b: ByteBuffer =>
val bytes = new Array[Byte](b.remaining)
b.get(bytes)
// Do not forget to reset the position
b.rewind()
bytes
case b: Array[Byte] => b
case other => throw new RuntimeException(s"$other is not a valid avro binary.")
}
updater.set(ordinal, bytes)
case (FIXED, _: DecimalType) => (updater, ordinal, value) =>
val d = avroType.getLogicalType.asInstanceOf[LogicalTypes.Decimal]
val bigDecimal = decimalConversions.fromFixed(value.asInstanceOf[GenericFixed], avroType, d)
val decimal = createDecimal(bigDecimal, d.getPrecision, d.getScale)
updater.setDecimal(ordinal, decimal)
case (BYTES, _: DecimalType) => (updater, ordinal, value) =>
val d = avroType.getLogicalType.asInstanceOf[LogicalTypes.Decimal]
val bigDecimal = decimalConversions.fromBytes(value.asInstanceOf[ByteBuffer], avroType, d)
val decimal = createDecimal(bigDecimal, d.getPrecision, d.getScale)
updater.setDecimal(ordinal, decimal)
case (RECORD, st: StructType) =>
// Avro datasource doesn't accept filters with nested attributes. See SPARK-32328.
// We can always return `false` from `applyFilters` for nested records.
val writeRecord = getRecordWriter(avroType, st, path, applyFilters = _ => false)
(updater, ordinal, value) =>
val row = new SpecificInternalRow(st)
writeRecord(new RowUpdater(row), value.asInstanceOf[GenericRecord])
updater.set(ordinal, row)
case (ARRAY, ArrayType(elementType, containsNull)) =>
val elementWriter = newWriter(avroType.getElementType, elementType, path)
(updater, ordinal, value) =>
val collection = value.asInstanceOf[java.util.Collection[Any]]
val result = createArrayData(elementType, collection.size())
val elementUpdater = new ArrayDataUpdater(result)
var i = 0
val iter = collection.iterator()
while (iter.hasNext) {
val element = iter.next()
if (element == null) {
if (!containsNull) {
throw new RuntimeException(s"Array value at path ${path.mkString(".")} is not " +
"allowed to be null")
} else {
elementUpdater.setNullAt(i)
}
} else {
elementWriter(elementUpdater, i, element)
}
i += 1
}
updater.set(ordinal, result)
case (MAP, MapType(keyType, valueType, valueContainsNull)) if keyType == StringType =>
val keyWriter = newWriter(SchemaBuilder.builder().stringType(), StringType, path)
val valueWriter = newWriter(avroType.getValueType, valueType, path)
(updater, ordinal, value) =>
val map = value.asInstanceOf[java.util.Map[AnyRef, AnyRef]]
val keyArray = createArrayData(keyType, map.size())
val keyUpdater = new ArrayDataUpdater(keyArray)
val valueArray = createArrayData(valueType, map.size())
val valueUpdater = new ArrayDataUpdater(valueArray)
val iter = map.entrySet().iterator()
var i = 0
while (iter.hasNext) {
val entry = iter.next()
assert(entry.getKey != null)
keyWriter(keyUpdater, i, entry.getKey)
if (entry.getValue == null) {
if (!valueContainsNull) {
throw new RuntimeException(s"Map value at path ${path.mkString(".")} is not " +
"allowed to be null")
} else {
valueUpdater.setNullAt(i)
}
} else {
valueWriter(valueUpdater, i, entry.getValue)
}
i += 1
}
// The Avro map will never have null or duplicated map keys, it's safe to create a
// ArrayBasedMapData directly here.
updater.set(ordinal, new ArrayBasedMapData(keyArray, valueArray))
case (UNION, _) =>
val allTypes = avroType.getTypes.asScala
val nonNullTypes = allTypes.filter(_.getType != NULL)
val nonNullAvroType = Schema.createUnion(nonNullTypes.asJava)
if (nonNullTypes.nonEmpty) {
if (nonNullTypes.length == 1) {
newWriter(nonNullTypes.head, catalystType, path)
} else {
nonNullTypes.map(_.getType).toSeq match {
case Seq(a, b) if Set(a, b) == Set(INT, LONG) && catalystType == LongType =>
(updater, ordinal, value) =>
value match {
case null => updater.setNullAt(ordinal)
case l: java.lang.Long => updater.setLong(ordinal, l)
case i: java.lang.Integer => updater.setLong(ordinal, i.longValue())
}
case Seq(a, b) if Set(a, b) == Set(FLOAT, DOUBLE) && catalystType == DoubleType =>
(updater, ordinal, value) =>
value match {
case null => updater.setNullAt(ordinal)
case d: java.lang.Double => updater.setDouble(ordinal, d)
case f: java.lang.Float => updater.setDouble(ordinal, f.doubleValue())
}
case _ =>
catalystType match {
case st: StructType if st.length == nonNullTypes.size =>
val fieldWriters = nonNullTypes.zip(st.fields).map {
case (schema, field) => newWriter(schema, field.dataType, path :+ field.name)
}.toArray
(updater, ordinal, value) => {
val row = new SpecificInternalRow(st)
val fieldUpdater = new RowUpdater(row)
val i = GenericData.get().resolveUnion(nonNullAvroType, value)
fieldWriters(i)(fieldUpdater, i, value)
updater.set(ordinal, row)
}
case _ =>
throw new IncompatibleSchemaException(
s"Cannot convert Avro to catalyst because schema at path " +
s"${path.mkString(".")} is not compatible " +
s"(avroType = $avroType, sqlType = $catalystType).\n" +
s"Source Avro schema: $rootAvroType.\n" +
s"Target Catalyst type: $rootCatalystType")
}
}
}
} else {
(updater, ordinal, value) => updater.setNullAt(ordinal)
}
case _ =>
throw new IncompatibleSchemaException(
s"Cannot convert Avro to catalyst because schema at path ${path.mkString(".")} " +
s"is not compatible (avroType = $avroType, sqlType = $catalystType).\n" +
s"Source Avro schema: $rootAvroType.\n" +
s"Target Catalyst type: $rootCatalystType")
}