| /* |
| * 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.presto.readers; |
| |
| import java.util.Optional; |
| |
| import org.apache.carbondata.core.metadata.datatype.DataType; |
| import org.apache.carbondata.core.scan.result.vector.CarbonDictionary; |
| import org.apache.carbondata.core.scan.result.vector.impl.CarbonColumnVectorImpl; |
| import org.apache.carbondata.core.util.ByteUtil; |
| |
| import io.airlift.slice.Slices; |
| import io.prestosql.spi.block.Block; |
| import io.prestosql.spi.block.BlockBuilder; |
| import io.prestosql.spi.block.DictionaryBlock; |
| import io.prestosql.spi.block.VariableWidthBlock; |
| import io.prestosql.spi.type.Type; |
| import io.prestosql.spi.type.VarcharType; |
| |
| import static io.airlift.slice.Slices.wrappedBuffer; |
| |
| /** |
| * This class reads the String data and convert it into Slice Block |
| */ |
| public class SliceStreamReader extends CarbonColumnVectorImpl implements PrestoVectorBlockBuilder { |
| |
| protected int batchSize; |
| |
| protected Type type = VarcharType.VARCHAR; |
| |
| protected BlockBuilder builder; |
| |
| private Block dictionaryBlock; |
| |
| private boolean isLocalDict; |
| |
| public SliceStreamReader(int batchSize, DataType dataType) { |
| super(batchSize, dataType); |
| this.batchSize = batchSize; |
| this.builder = type.createBlockBuilder(null, batchSize); |
| } |
| |
| @Override |
| public Block buildBlock() { |
| if (dictionaryBlock == null) { |
| return builder.build(); |
| } else { |
| int[] dataArray; |
| if (isLocalDict) { |
| dataArray = (int[]) ((CarbonColumnVectorImpl) getDictionaryVector()).getDataArray(); |
| } else { |
| dataArray = (int[]) getDataArray(); |
| } |
| return new DictionaryBlock(batchSize, dictionaryBlock, dataArray); |
| } |
| } |
| |
| @Override |
| public void setDictionary(CarbonDictionary dictionary) { |
| super.setDictionary(dictionary); |
| if (dictionary == null) { |
| dictionaryBlock = null; |
| this.isLocalDict = false; |
| return; |
| } |
| boolean[] nulls = new boolean[dictionary.getDictionarySize()]; |
| nulls[0] = true; |
| nulls[1] = true; |
| int[] dictOffsets = new int[dictionary.getDictionarySize() + 1]; |
| int size = 0; |
| for (int i = 0; i < dictionary.getDictionarySize(); i++) { |
| dictOffsets[i] = size; |
| if (dictionary.getDictionaryValue(i) != null) { |
| size += dictionary.getDictionaryValue(i).length; |
| } |
| } |
| byte[] singleArrayDictValues = new byte[size]; |
| for (int i = 0; i < dictionary.getDictionarySize(); i++) { |
| if (dictionary.getDictionaryValue(i) != null) { |
| System.arraycopy(dictionary.getDictionaryValue(i), 0, singleArrayDictValues, dictOffsets[i], |
| dictionary.getDictionaryValue(i).length); |
| } |
| } |
| dictOffsets[dictOffsets.length - 1] = size; |
| dictionaryBlock = new VariableWidthBlock(dictionary.getDictionarySize(), |
| Slices.wrappedBuffer(singleArrayDictValues), dictOffsets, Optional.of(nulls)); |
| this.isLocalDict = true; |
| } |
| |
| @Override |
| public void setBatchSize(int batchSize) { |
| this.batchSize = batchSize; |
| } |
| |
| @Override |
| public void putByteArray(int rowId, byte[] value) { |
| type.writeSlice(builder, wrappedBuffer(value)); |
| } |
| |
| @Override |
| public void putByteArray(int rowId, int offset, int length, byte[] value) { |
| type.writeSlice(builder, wrappedBuffer(value), offset, length); |
| } |
| |
| @Override |
| public void putByteArray(int rowId, int count, byte[] value) { |
| for (int i = 0; i < count; i++) { |
| type.writeSlice(builder, wrappedBuffer(value)); |
| } |
| } |
| |
| @Override |
| public void putNull(int rowId) { |
| if (dictionaryBlock == null) { |
| builder.appendNull(); |
| } |
| } |
| |
| @Override |
| public void putNulls(int rowId, int count) { |
| if (dictionaryBlock == null) { |
| for (int i = 0; i < count; ++i) { |
| builder.appendNull(); |
| } |
| } |
| } |
| |
| @Override |
| public void reset() { |
| builder = type.createBlockBuilder(null, batchSize); |
| } |
| |
| @Override |
| public void putObject(int rowId, Object value) { |
| if (value == null) { |
| putNull(rowId); |
| } else { |
| if (dictionaryBlock == null) { |
| putByteArray(rowId, ByteUtil.toBytes((String) value)); |
| } else { |
| putInt(rowId, (int) value); |
| } |
| } |
| } |
| } |