parquet.thrift.TBaseRecordConverter Maven / Gradle / Ivy

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/**
 * Copyright 2012 Twitter, Inc.
 *
 * Licensed 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 parquet.thrift;

import org.apache.thrift.TBase;
import org.apache.thrift.TException;
import org.apache.thrift.protocol.TProtocol;

import parquet.io.ParquetDecodingException;
import parquet.schema.MessageType;
import parquet.thrift.struct.ThriftType.StructType;

public class TBaseRecordConverter> extends ThriftRecordConverter {

  public TBaseRecordConverter(final Class thriftClass, MessageType requestedParquetSchema, StructType thriftType) {
    super(new ThriftReader() {
      @Override
      public T readOneRecord(TProtocol protocol) throws TException {
          try {
            T thriftObject = thriftClass.newInstance();
            thriftObject.read(protocol);
            return thriftObject;
          } catch (InstantiationException e) {
            throw new ParquetDecodingException("Could not instantiate Thrift " + thriftClass, e);
          } catch (IllegalAccessException e) {
            throw new ParquetDecodingException("Thrift class or constructor not public " + thriftClass, e);
          }
      }
    }, thriftClass.getSimpleName(), requestedParquetSchema, thriftType);
  }

}