parquet.thrift.projection.amend.ReadFieldBeginProtocol 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.projection.amend;

import org.apache.thrift.TException;
import org.apache.thrift.protocol.TField;
import parquet.thrift.ParquetProtocol;
import parquet.thrift.struct.ThriftField;
import parquet.thrift.struct.ThriftTypeID;

public class ReadFieldBeginProtocol extends ParquetProtocol {
  private final ThriftField field;
  private final byte thriftType;

  public ReadFieldBeginProtocol(ThriftField missingField) {
    super("readFieldBegin()");
    this.field = missingField;
    this.thriftType =
            missingField.getType().getType() == ThriftTypeID.ENUM ?
                    ThriftTypeID.I32.getThriftType() : // enums are serialized as I32
                    missingField.getType().getType().getThriftType();
  }

  @Override
  public TField readFieldBegin() throws TException {
    return new TField(field.getName(), thriftType, field.getFieldId());
  }
}