| /* |
| * 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.parquet.scrooge; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.thrift.TException; |
| import org.apache.thrift.protocol.TProtocol; |
| |
| import com.twitter.scrooge.ThriftStruct; |
| import com.twitter.scrooge.ThriftStructCodec; |
| |
| import org.apache.parquet.schema.MessageType; |
| import org.apache.parquet.thrift.ThriftReader; |
| import org.apache.parquet.thrift.ThriftRecordConverter; |
| import org.apache.parquet.thrift.struct.ThriftType.StructType; |
| |
| public class ScroogeRecordConverter<T extends ThriftStruct> extends ThriftRecordConverter<T> { |
| |
| /** |
| * This is for compatibility only. |
| * @param thriftClass a thrift class |
| * @param parquetSchema a parquet schema |
| * @param thriftType a thrift type descriptor |
| * @deprecated will be removed in 2.x |
| */ |
| @Deprecated |
| public ScroogeRecordConverter(final Class<T> thriftClass, MessageType parquetSchema, StructType thriftType) { |
| this(thriftClass, parquetSchema, thriftType, null); |
| } |
| |
| public ScroogeRecordConverter(final Class<T> thriftClass, MessageType parquetSchema, StructType thriftType, Configuration conf) { |
| super(new ThriftReader<T>() { |
| @SuppressWarnings("unchecked") |
| ThriftStructCodec<T> codec = (ThriftStructCodec<T>) getCodec(thriftClass); |
| @Override |
| public T readOneRecord(TProtocol protocol) throws TException { |
| return codec.decode(protocol); |
| } |
| }, thriftClass.getSimpleName(), parquetSchema, thriftType, conf); |
| } |
| |
| private static ThriftStructCodec<?> getCodec(Class<?> klass) { |
| Class<?> companionClass; |
| try { |
| companionClass = Class.forName(klass.getName() + "$"); |
| Object companionObject = companionClass.getField("MODULE$").get(null); |
| return (ThriftStructCodec<?>) companionObject; |
| } catch (Exception t) { |
| if (t instanceof InterruptedException) Thread.currentThread().interrupt(); |
| throw new RuntimeException("Unable to create ThriftStructCodec", t); |
| } |
| } |
| } |