| /* |
| * 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.parquet.columnreaders; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| |
| import org.apache.drill.common.exceptions.ExecutionSetupException; |
| import org.apache.drill.exec.vector.ValueVector; |
| import org.apache.parquet.column.ColumnDescriptor; |
| import org.apache.parquet.format.SchemaElement; |
| import org.apache.parquet.hadoop.metadata.ColumnChunkMetaData; |
| import org.apache.parquet.io.api.Binary; |
| |
| public abstract class VarLengthColumn<V extends ValueVector> extends ColumnReader<V> { |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(VarLengthColumn.class); |
| |
| Binary currDictVal; |
| |
| VarLengthColumn(ParquetRecordReader parentReader, ColumnDescriptor descriptor, |
| ColumnChunkMetaData columnChunkMetaData, boolean fixedLength, V v, |
| SchemaElement schemaElement) throws ExecutionSetupException { |
| super(parentReader, descriptor, columnChunkMetaData, fixedLength, v, schemaElement); |
| if (!Collections.disjoint(columnChunkMetaData.getEncodings(), ColumnReader.DICTIONARY_ENCODINGS)) { |
| usingDictionary = true; |
| } |
| else { |
| usingDictionary = false; |
| } |
| } |
| |
| @Override |
| protected boolean processPageData(int recordsToReadInThisPass) throws IOException { |
| return readAndStoreValueSizeInformation(); |
| } |
| |
| @Override |
| public void reset() { |
| super.reset(); |
| pageReader.valuesReadyToRead = 0; |
| } |
| |
| protected abstract boolean readAndStoreValueSizeInformation() throws IOException; |
| |
| public abstract boolean skipReadyToReadPositionUpdate(); |
| |
| } |