| /* |
| * 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.carbondata.hive; |
| |
| import java.io.IOException; |
| import java.sql.Timestamp; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.carbondata.core.metadata.datatype.DataType; |
| import org.apache.carbondata.core.metadata.datatype.DataTypes; |
| import org.apache.carbondata.core.metadata.schema.table.CarbonTable; |
| import org.apache.carbondata.core.metadata.schema.table.column.CarbonColumn; |
| import org.apache.carbondata.core.metadata.schema.table.column.CarbonDimension; |
| import org.apache.carbondata.hadoop.readsupport.CarbonReadSupport; |
| |
| import org.apache.hadoop.hive.common.type.HiveDecimal; |
| import org.apache.hadoop.hive.serde2.io.*; |
| import org.apache.hadoop.hive.serde2.io.DoubleWritable; |
| import org.apache.hadoop.hive.serde2.io.ShortWritable; |
| import org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableTimestampObjectInspector; |
| import org.apache.hadoop.io.ArrayWritable; |
| import org.apache.hadoop.io.BooleanWritable; |
| import org.apache.hadoop.io.BytesWritable; |
| import org.apache.hadoop.io.FloatWritable; |
| import org.apache.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.MapWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.io.Writable; |
| |
| /** |
| * This is the class to convert to Writable object for Hive |
| */ |
| public class WritableReadSupport<T> implements CarbonReadSupport<T> { |
| |
| /** |
| * carbon columns |
| */ |
| protected CarbonColumn[] carbonColumns; |
| |
| protected Writable[] writableArr; |
| |
| /** |
| * This initialization is done inside executor task |
| * for column dictionary involved in decoding. |
| * |
| * @param carbonColumns column list |
| * @param carbonTable table identifier |
| */ |
| @Override |
| public void initialize(CarbonColumn[] carbonColumns, |
| CarbonTable carbonTable) { |
| this.carbonColumns = carbonColumns; |
| } |
| |
| @Override |
| public T readRow(Object[] data) { |
| writableArr = new Writable[data.length]; |
| for (int i = 0; i < data.length; i++) { |
| try { |
| writableArr[i] = createWritableObject(data[i], carbonColumns[i]); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| return (T) writableArr; |
| } |
| |
| /** |
| * To Create the Writable from the CarbonData data |
| * |
| * @param obj |
| * @param carbonColumn |
| * @return |
| * @throws IOException |
| */ |
| private Writable createWritableObject(Object obj, CarbonColumn carbonColumn) throws IOException { |
| DataType dataType = carbonColumn.getDataType(); |
| if (DataTypes.isStructType(dataType)) { |
| return createStruct(obj, carbonColumn); |
| } else if (DataTypes.isArrayType(dataType)) { |
| return createArray(obj, carbonColumn); |
| } else if (DataTypes.isMapType(dataType)) { |
| return createMap(obj, carbonColumn); |
| } else { |
| return createWritablePrimitive(obj, carbonColumn); |
| } |
| } |
| |
| /** |
| * Create Array Data for Array Datatype |
| * |
| * @param obj |
| * @param carbonColumn |
| * @return |
| * @throws IOException |
| */ |
| private ArrayWritable createArray(Object obj, CarbonColumn carbonColumn) throws IOException { |
| Object[] objArray = (Object[]) obj; |
| List<CarbonDimension> childCarbonDimensions = null; |
| CarbonDimension arrayDimension = null; |
| if (carbonColumn.isDimension() && carbonColumn.getColumnSchema().getNumberOfChild() > 0) { |
| childCarbonDimensions = ((CarbonDimension) carbonColumn).getListOfChildDimensions(); |
| arrayDimension = childCarbonDimensions.get(0); |
| } |
| List array = new ArrayList(); |
| if (objArray != null) { |
| for (int i = 0; i < objArray.length; i++) { |
| Object curObj = objArray[i]; |
| Writable newObj = createWritableObject(curObj, arrayDimension); |
| array.add(newObj); |
| } |
| } |
| if (array.size() > 0) { |
| return new ArrayWritable(Writable.class, |
| (Writable[]) array.toArray(new Writable[array.size()])); |
| } |
| return null; |
| } |
| |
| /** |
| * Create the Struct data for the Struct Datatype |
| * |
| * @param obj |
| * @param carbonColumn |
| * @return |
| * @throws IOException |
| */ |
| private ArrayWritable createStruct(Object obj, CarbonColumn carbonColumn) throws IOException { |
| Object[] objArray = (Object[]) obj; |
| List<CarbonDimension> childCarbonDimensions = null; |
| if (carbonColumn.isDimension() && carbonColumn.getColumnSchema().getNumberOfChild() > 0) { |
| childCarbonDimensions = ((CarbonDimension) carbonColumn).getListOfChildDimensions(); |
| } |
| |
| if (null != childCarbonDimensions) { |
| Writable[] arr = new Writable[objArray.length]; |
| for (int i = 0; i < objArray.length; i++) { |
| |
| arr[i] = createWritableObject(objArray[i], childCarbonDimensions.get(i)); |
| } |
| return new ArrayWritable(Writable.class, arr); |
| } |
| return null; |
| } |
| |
| /** |
| * Create the Map data for Map Datatype |
| * |
| * @param obj |
| * @param carbonColumn |
| * @return |
| * @throws IOException |
| */ |
| private Writable createMap(Object obj, CarbonColumn carbonColumn) throws IOException { |
| Object[] objArray = (Object[]) obj; |
| List<CarbonDimension> childCarbonDimensions = null; |
| CarbonDimension mapDimension = null; |
| if (carbonColumn.isDimension() && carbonColumn.getColumnSchema().getNumberOfChild() > 0) { |
| childCarbonDimensions = ((CarbonDimension) carbonColumn).getListOfChildDimensions(); |
| // get the map dimension wrapped inside the carbon dimension |
| mapDimension = childCarbonDimensions.get(0); |
| // get the child dimenesions of the map dimensions, child dimensions are - Key and Value |
| if (null != mapDimension) { |
| childCarbonDimensions = mapDimension.getListOfChildDimensions(); |
| } |
| } |
| Map<Writable, Writable> rawMap = new HashMap<>(); |
| if (null != childCarbonDimensions && childCarbonDimensions.size() == 2) { |
| Object[] keyObjects = (Object[]) objArray[0]; |
| Object[] valObjects = (Object[]) objArray[1]; |
| for (int i = 0; i < keyObjects.length; i++) { |
| Writable keyWritable = createWritableObject(keyObjects[i], childCarbonDimensions.get(0)); |
| Writable valWritable = createWritableObject(valObjects[i], childCarbonDimensions.get(1)); |
| rawMap.put(keyWritable, valWritable); |
| } |
| } |
| MapWritable mapWritable = new MapWritable(); |
| mapWritable.putAll(rawMap); |
| return mapWritable; |
| } |
| |
| /** |
| * This method will create the Writable Objects for primitives. |
| * |
| * @param obj |
| * @param carbonColumn |
| * @return |
| * @throws IOException |
| */ |
| private Writable createWritablePrimitive(Object obj, CarbonColumn carbonColumn) |
| throws IOException { |
| DataType dataType = carbonColumn.getDataType(); |
| if (obj == null) { |
| return null; |
| } |
| if (dataType == DataTypes.NULL) { |
| return null; |
| } else if (dataType == DataTypes.DOUBLE) { |
| return new DoubleWritable((double) obj); |
| } else if (dataType == DataTypes.INT) { |
| return new IntWritable((int) obj); |
| } else if (dataType == DataTypes.LONG) { |
| return new LongWritable((long) obj); |
| } else if (dataType == DataTypes.SHORT) { |
| return new ShortWritable((short) obj); |
| } else if (dataType == DataTypes.BOOLEAN) { |
| return new BooleanWritable((boolean) obj); |
| } else if (dataType == DataTypes.VARCHAR) { |
| return new Text(obj.toString()); |
| } else if (dataType == DataTypes.BINARY) { |
| return new BytesWritable((byte[]) obj); |
| } else if (dataType == DataTypes.DATE) { |
| return new DateWritableV2((Integer) obj); |
| } else if (dataType == DataTypes.TIMESTAMP) { |
| WritableTimestampObjectInspector ins = new WritableTimestampObjectInspector(); |
| return ins.getPrimitiveWritableObject(ins.create(new Timestamp((long) obj / 1000))); |
| } else if (dataType == DataTypes.STRING) { |
| return new Text(obj.toString()); |
| } else if (DataTypes.isArrayType(dataType)) { |
| return createArray(obj, carbonColumn); |
| } else if (DataTypes.isStructType(dataType)) { |
| return createStruct(obj, carbonColumn); |
| } else if (DataTypes.isMapType(dataType)) { |
| return createMap(obj, carbonColumn); |
| } else if (DataTypes.isDecimal(dataType)) { |
| return new HiveDecimalWritable(HiveDecimal.create(new java.math.BigDecimal(obj.toString()))); |
| } else if (dataType == DataTypes.FLOAT) { |
| return new FloatWritable((float) obj); |
| } else { |
| throw new IOException("unsupported data type:" + dataType); |
| } |
| } |
| |
| } |