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.merge;
  
  import org.apache.asterix.column.metadata.AbstractColumnImmutableReadMetadata;
  import org.apache.asterix.column.tuple.MergeColumnTupleReference;
  import org.apache.asterix.column.zero.PageZeroWriterFlavorSelector;
  import org.apache.hyracks.storage.am.lsm.btree.column.api.AbstractColumnTupleReader;
  import org.apache.hyracks.storage.am.lsm.btree.column.api.IColumnReadMultiPageOp;
  import org.apache.hyracks.storage.am.lsm.btree.column.api.IColumnTupleIterator;
  import org.apache.hyracks.storage.am.lsm.btree.column.impls.btree.ColumnBTreeReadLeafFrame;
  
  public class MergeColumnTupleReader extends AbstractColumnTupleReader {
      private final MergeColumnReadMetadata columnMetadata;
  
      public MergeColumnTupleReader(AbstractColumnImmutableReadMetadata columnMetadata) {
          super(new PageZeroWriterFlavorSelector());
          this.columnMetadata = (MergeColumnReadMetadata) columnMetadata;
      }
  
      @Override
      public IColumnTupleIterator createTupleIterator(ColumnBTreeReadLeafFrame frame, int componentIndex,
              IColumnReadMultiPageOp multiPageOp) {
          return new MergeColumnTupleReference(componentIndex, frame, columnMetadata, multiPageOp);
      }
  }
  