content: /*
   * 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.asterix.column.operation.lsm.load;
  
  import org.apache.asterix.column.operation.lsm.flush.FlushColumnMetadata;
  import org.apache.asterix.column.operation.lsm.flush.FlushColumnTupleWriter;
  import org.apache.hyracks.api.exceptions.ErrorCode;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.data.std.util.ArrayBackedValueStorage;
  import org.apache.hyracks.dataflow.common.data.accessors.ITupleReference;
  import org.apache.hyracks.dataflow.common.data.accessors.PointableTupleReference;
  import org.apache.hyracks.storage.am.lsm.btree.column.cloud.buffercache.IColumnWriteContext;
  import org.apache.hyracks.storage.common.MultiComparator;
  
  public class LoadColumnTupleWriter extends FlushColumnTupleWriter {
      private final PointableTupleReference prevTupleKeys;
      private final MultiComparator comparator;
  
      public LoadColumnTupleWriter(FlushColumnMetadata columnMetadata, int pageSize, int maxNumberOfTuples,
              double tolerance, int maxLeafNodeSize, MultiComparator comparator, IColumnWriteContext writeContext) {
          super(columnMetadata, pageSize, maxNumberOfTuples, tolerance, maxLeafNodeSize, writeContext);
          prevTupleKeys =
                  PointableTupleReference.create(columnMetadata.getNumberOfPrimaryKeys(), ArrayBackedValueStorage::new);
          this.comparator = comparator;
      }
  
      @Override
      public void writeTuple(ITupleReference tuple) throws HyracksDataException {
          ensureKeysUniqueness(tuple);
          writeRecord(tuple);
      }
  
      private void ensureKeysUniqueness(ITupleReference tuple) throws HyracksDataException {
          if (prevTupleKeys.getFieldLength(0) > 0 && comparator.compare(prevTupleKeys, tuple) == 0) {
              throw HyracksDataException.create(ErrorCode.DUPLICATE_LOAD_INPUT);
          }
          prevTupleKeys.set(tuple);
      }
  }
  