cgivre commented on a change in pull request #1778: DRILL-7233: Format Plugin for HDF5 URL: https://github.com/apache/drill/pull/1778#discussion_r364535389
########## File path: contrib/format-hdf5/src/main/java/org/apache/drill/exec/store/hdf5/writers/HDF5DoubleDataWriter.java ########## @@ -0,0 +1,103 @@ +/* + * 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.drill.exec.store.hdf5.writers; + +import ch.systemsx.cisd.hdf5.IHDF5Reader; +import org.apache.drill.common.types.TypeProtos; +import org.apache.drill.exec.physical.resultSet.RowSetLoader; +import org.apache.drill.exec.store.hdf5.HDF5Utils; +import org.apache.drill.exec.vector.accessor.ScalarWriter; + +import java.util.List; + +public class HDF5DoubleDataWriter extends HDF5DataWriter { + + private final double[] data; + + private final ScalarWriter rowWriter; + + // This constructor is used when the data is a 1D column. The column is inferred from the datapath + public HDF5DoubleDataWriter(IHDF5Reader reader, RowSetLoader columnWriter, String datapath) { + super(reader, columnWriter, datapath); + data = reader.readDoubleArray(datapath); + + fieldName = HDF5Utils.getNameFromPath(datapath); + rowWriter = makeWriter(columnWriter, fieldName, TypeProtos.MinorType.FLOAT8, TypeProtos.DataMode.OPTIONAL); + } + + // This constructor is used when the data is part of a 2D array. In this case the column name is provided in the constructor + public HDF5DoubleDataWriter(IHDF5Reader reader, RowSetLoader columnWriter, String datapath, String fieldName, int currentColumn) { + super(reader, columnWriter, datapath, fieldName, currentColumn); + // Get dimensions + long[] dimensions = reader.object().getDataSetInformation(datapath).getDimensions(); + double[][] tempData; + if (dimensions.length == 2) { + tempData = transpose(reader.readDoubleMatrix(datapath)); + } else { + tempData = transpose(reader.float64().readMDArray(datapath).toMatrix()); + } + data = tempData[currentColumn]; + rowWriter = makeWriter(columnWriter, fieldName, TypeProtos.MinorType.FLOAT8, TypeProtos.DataMode.OPTIONAL); + } + + public HDF5DoubleDataWriter(IHDF5Reader reader, RowSetLoader columnWriter, String fieldName, List tempListData) { + super(reader, columnWriter, null); + this.fieldName = fieldName; + data = new double[tempListData.size()]; + for (int i = 0; i < tempListData.size(); i++) { + data[i] = (Double)tempListData.get(i); + } + rowWriter = makeWriter(columnWriter, fieldName, TypeProtos.MinorType.FLOAT8, TypeProtos.DataMode.OPTIONAL); + } + + + public boolean write() { + if (counter > data.length) { + return false; + } else { + rowWriter.setDouble(data[counter++]); + return true; + } + } + + public boolean hasNext() { + return counter < data.length; + } + + private double[][] transpose(double[][] array) { Review comment: I couldn't figure any way to do this in a generic way, however, I'm not an expert on some of Java's tricks for generic data types. ---------------------------------------------------------------- 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: us...@infra.apache.org With regards, Apache Git Services
