rdblue commented on a change in pull request #828: iceberg-spark changes for vectorized reads URL: https://github.com/apache/incubator-iceberg/pull/828#discussion_r389119095
########## File path: spark/src/main/java/org/apache/iceberg/spark/arrow/ArrowUtils.java ########## @@ -0,0 +1,113 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.iceberg.spark.arrow; + +import org.apache.arrow.memory.RootAllocator; +import org.apache.arrow.vector.types.DateUnit; +import org.apache.arrow.vector.types.FloatingPointPrecision; +import org.apache.arrow.vector.types.TimeUnit; +import org.apache.arrow.vector.types.pojo.ArrowType; +import org.apache.arrow.vector.types.pojo.Field; +import org.apache.spark.sql.types.ArrayType; +import org.apache.spark.sql.types.DataType; +import org.apache.spark.sql.types.DataTypes; +import org.apache.spark.sql.types.DecimalType; +import org.apache.spark.sql.types.Metadata; +import org.apache.spark.sql.types.StructField; +import org.apache.spark.sql.types.StructType; + +public class ArrowUtils { + + private static ArrowUtils instance; + private RootAllocator rootAllocator; + + private ArrowUtils() { + rootAllocator = new RootAllocator(Long.MAX_VALUE); + } + + public static ArrowUtils instance() { + if (instance == null) { + instance = new ArrowUtils(); + } + return instance; + } + + public RootAllocator rootAllocator() { + return rootAllocator; + } + + @SuppressWarnings("checkstyle:CyclomaticComplexity") + public DataType fromArrowType(ArrowType data) { + + if (data instanceof ArrowType.Bool) { + return DataTypes.BooleanType; + } else if (data instanceof ArrowType.Int) { + ArrowType.Int intData = (ArrowType.Int) data; + if (intData.getIsSigned() && intData.getBitWidth() == 8) { + return DataTypes.ByteType; + } else if (intData.getIsSigned() && intData.getBitWidth() == 8 * 2) { + return DataTypes.ShortType; + } else if (intData.getIsSigned() && intData.getBitWidth() == 8 * 4) { + return DataTypes.IntegerType; + } else if (intData.getIsSigned() && intData.getBitWidth() == 8 * 8) { + return DataTypes.LongType; + } + } else if (data instanceof ArrowType.FloatingPoint) { + ArrowType.FloatingPoint floatData = (ArrowType.FloatingPoint) data; + if (floatData.getPrecision() == FloatingPointPrecision.SINGLE) { + return DataTypes.FloatType; + } else if (floatData.getPrecision() == FloatingPointPrecision.DOUBLE) { + return DataTypes.DoubleType; + } + } else if (data instanceof ArrowType.Utf8) { + return DataTypes.StringType; + } else if (data instanceof ArrowType.Binary) { + return DataTypes.BinaryType; + } else if (data instanceof ArrowType.Decimal) { + ArrowType.Decimal decimalData = (ArrowType.Decimal) data; + return new DecimalType(decimalData.getPrecision(), decimalData.getScale()); + } else if (data instanceof ArrowType.Date && ((ArrowType.Date) data).getUnit() == DateUnit.DAY) { + return DataTypes.DateType; + } else if (data instanceof ArrowType.Timestamp && ((ArrowType.Timestamp) data).getUnit() == TimeUnit.MICROSECOND) { + return DataTypes.TimestampType; + } + + throw new UnsupportedOperationException("Unsupported data type: " + data); + } + + public DataType fromArrowField(Field field) { Review comment: The data type methods could be static instead. Could you break this class into `SparkArrowTypeUtil` and something like `ArrowAllocation`? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
