| /* |
| * 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.Date; |
| import java.sql.Timestamp; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.carbondata.core.cache.Cache; |
| import org.apache.carbondata.core.cache.CacheProvider; |
| import org.apache.carbondata.core.cache.CacheType; |
| import org.apache.carbondata.core.cache.dictionary.Dictionary; |
| import org.apache.carbondata.core.cache.dictionary.DictionaryColumnUniqueIdentifier; |
| import org.apache.carbondata.core.metadata.AbsoluteTableIdentifier; |
| import org.apache.carbondata.core.metadata.datatype.DataType; |
| import org.apache.carbondata.core.metadata.encoder.Encoding; |
| import org.apache.carbondata.core.metadata.schema.table.column.CarbonColumn; |
| import org.apache.carbondata.core.metadata.schema.table.column.CarbonDimension; |
| import org.apache.carbondata.core.util.CarbonUtil; |
| |
| import org.apache.carbondata.hadoop.readsupport.CarbonReadSupport; |
| |
| import org.apache.hadoop.hive.common.type.HiveDecimal; |
| import org.apache.hadoop.hive.serde2.io.DateWritable; |
| import org.apache.hadoop.hive.serde2.io.DoubleWritable; |
| import org.apache.hadoop.hive.serde2.io.HiveDecimalWritable; |
| import org.apache.hadoop.hive.serde2.io.ShortWritable; |
| import org.apache.hadoop.hive.serde2.io.TimestampWritable; |
| |
| import org.apache.hadoop.io.ArrayWritable; |
| import org.apache.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.io.Writable; |
| |
| import org.apache.spark.sql.catalyst.expressions.GenericInternalRow; |
| import org.apache.spark.sql.catalyst.util.GenericArrayData; |
| |
| /** |
| * This is the class to decode dictionary encoded column data back to its original value. |
| */ |
| public class CarbonDictionaryDecodeReadSupport<T> implements CarbonReadSupport<T> { |
| |
| protected Dictionary[] dictionaries; |
| |
| protected DataType[] dataTypes; |
| /** |
| * 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 absoluteTableIdentifier table identifier |
| */ |
| @Override public void initialize(CarbonColumn[] carbonColumns, |
| AbsoluteTableIdentifier absoluteTableIdentifier) throws IOException { |
| this.carbonColumns = carbonColumns; |
| dictionaries = new Dictionary[carbonColumns.length]; |
| dataTypes = new DataType[carbonColumns.length]; |
| for (int i = 0; i < carbonColumns.length; i++) { |
| if (carbonColumns[i].hasEncoding(Encoding.DICTIONARY) && !carbonColumns[i] |
| .hasEncoding(Encoding.DIRECT_DICTIONARY) && !carbonColumns[i].isComplex()) { |
| CacheProvider cacheProvider = CacheProvider.getInstance(); |
| Cache<DictionaryColumnUniqueIdentifier, Dictionary> forwardDictionaryCache = cacheProvider |
| .createCache(CacheType.FORWARD_DICTIONARY, absoluteTableIdentifier.getStorePath()); |
| dataTypes[i] = carbonColumns[i].getDataType(); |
| dictionaries[i] = forwardDictionaryCache.get( |
| new DictionaryColumnUniqueIdentifier(absoluteTableIdentifier.getCarbonTableIdentifier(), |
| carbonColumns[i].getColumnIdentifier(), dataTypes[i])); |
| } else { |
| dataTypes[i] = carbonColumns[i].getDataType(); |
| } |
| } |
| } |
| |
| @Override public T readRow(Object[] data) { |
| assert (data.length == dictionaries.length); |
| writableArr = new Writable[data.length]; |
| for (int i = 0; i < dictionaries.length; i++) { |
| if (dictionaries[i] != null) { |
| data[i] = dictionaries[i].getDictionaryValueForKey((int) data[i]); |
| } |
| try { |
| writableArr[i] = createWritableObject(data[i], carbonColumns[i]); |
| } catch (IOException e) { |
| throw new RuntimeException(e.getMessage(), e); |
| } |
| } |
| |
| return (T) writableArr; |
| } |
| |
| /** |
| * to book keep the dictionary cache or update access count for each |
| * column involved during decode, to facilitate LRU cache policy if memory |
| * threshold is reached |
| */ |
| @Override public void close() { |
| if (dictionaries == null) { |
| return; |
| } |
| for (int i = 0; i < dictionaries.length; i++) { |
| CarbonUtil.clearDictionaryCache(dictionaries[i]); |
| } |
| } |
| |
| /** |
| * 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(); |
| switch (dataType) { |
| case STRUCT: |
| return createStruct(obj, carbonColumn); |
| case ARRAY: |
| return createArray(obj, carbonColumn); |
| default: |
| 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 { |
| if (obj instanceof GenericArrayData) { |
| Object[] objArray = ((GenericArrayData) obj).array(); |
| 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) { |
| ArrayWritable subArray = new ArrayWritable(Writable.class, |
| (Writable[]) array.toArray(new Writable[array.size()])); |
| return new ArrayWritable(Writable.class, new Writable[] { subArray }); |
| } |
| } |
| 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 { |
| if (obj instanceof GenericInternalRow) { |
| Object[] objArray = ((GenericInternalRow) obj).values(); |
| List<CarbonDimension> childCarbonDimensions = null; |
| if (carbonColumn.isDimension() && carbonColumn.getColumnSchema().getNumberOfChild() > 0) { |
| childCarbonDimensions = ((CarbonDimension) carbonColumn).getListOfChildDimensions(); |
| } |
| 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); |
| } |
| throw new IOException("DataType not supported in Carbondata"); |
| } |
| |
| /** |
| * 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; |
| } |
| switch (dataType) { |
| case NULL: |
| return null; |
| case DOUBLE: |
| return new DoubleWritable((double) obj); |
| case INT: |
| return new IntWritable((int) obj); |
| case LONG: |
| return new LongWritable((long) obj); |
| case SHORT: |
| return new ShortWritable((Short) obj); |
| case DATE: |
| return new DateWritable(new Date((long) obj)); |
| case TIMESTAMP: |
| return new TimestampWritable(new Timestamp((long) obj)); |
| case STRING: |
| return new Text(obj.toString()); |
| case DECIMAL: |
| return new HiveDecimalWritable( |
| HiveDecimal.create(new java.math.BigDecimal(obj.toString()))); |
| default: |
| throw new IOException("unsupported data type:" + dataType); |
| } |
| } |
| |
| /** |
| * If we need to use the same Writable[] then we can use this method |
| * |
| * @param writable |
| * @param obj |
| * @param carbonColumn |
| * @throws IOException |
| */ |
| private void setPrimitive(Writable writable, Object obj, CarbonColumn carbonColumn) |
| throws IOException { |
| DataType dataType = carbonColumn.getDataType(); |
| if (obj == null) { |
| writable.write(null); |
| } |
| switch (dataType) { |
| case DOUBLE: |
| ((DoubleWritable) writable).set((double) obj); |
| break; |
| case INT: |
| ((IntWritable) writable).set((int) obj); |
| break; |
| case LONG: |
| ((LongWritable) writable).set((long) obj); |
| break; |
| case SHORT: |
| ((ShortWritable) writable).set((short) obj); |
| break; |
| case DATE: |
| ((DateWritable) writable).set(new Date((Long) obj)); |
| break; |
| case TIMESTAMP: |
| ((TimestampWritable) writable).set(new Timestamp((long) obj)); |
| break; |
| case STRING: |
| ((Text) writable).set(obj.toString()); |
| break; |
| case DECIMAL: |
| ((HiveDecimalWritable) writable) |
| .set(HiveDecimal.create(new java.math.BigDecimal(obj.toString()))); |
| break; |
| default: |
| throw new IOException("unsupported data type:" + dataType); |
| } |
| } |
| |
| } |