/**
 * 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.tajo.tuple.memory;

import org.apache.tajo.common.TajoDataTypes;
import org.apache.tajo.exception.TajoInternalError;
import org.apache.tajo.exception.ValueOutOfRangeException;
import org.apache.tajo.storage.Tuple;
import org.apache.tajo.util.TUtil;

public class OffHeapRowBlockWriter extends OffHeapRowWriter {
  private RowBlock rowBlock;

  OffHeapRowBlockWriter(RowBlock rowBlock) {
    super(rowBlock.getDataTypes());
    this.rowBlock = rowBlock;
    if (!rowBlock.getMemory().hasAddress()) {
      throw new TajoInternalError(rowBlock.getMemory().getClass().getSimpleName()
          + " does not support to direct memory access");
    }
  }

  public long address() {
    return rowBlock.getMemory().address();
  }

  public int position() {
    return rowBlock.getMemory().writerPosition();
  }

  @Override
  public void forward(int length) {
    rowBlock.getMemory().writerPosition(rowBlock.getMemory().writerPosition() + length);
  }

  @Override
  public void backward(int length) {
    rowBlock.getMemory().writerPosition(rowBlock.getMemory().writerPosition() - length);
  }

  public void ensureSize(int size) {
    rowBlock.getMemory().ensureSize(size);
  }

  @Override
  public void endRow() {
    super.endRow();
    rowBlock.setRows(rowBlock.rows() + 1);
  }

  @Override
  public TajoDataTypes.DataType[] dataTypes() {
    return rowBlock.getDataTypes();
  }


  @Override
  public boolean addTuple(Tuple tuple) {
    try {
      if (tuple instanceof UnSafeTuple) {
        UnSafeTuple unSafeTuple = TUtil.checkTypeAndGet(tuple, UnSafeTuple.class);
        addTuple(unSafeTuple);
        rowBlock.setRows(rowBlock.rows() + 1);
      } else {
        OffHeapRowBlockUtils.convert(tuple, this);
      }
    } catch (ValueOutOfRangeException e) {
      return false;
    }
    return true;
  }
}