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.metadata;
  
  import org.apache.asterix.om.types.ARecordType;
  import org.apache.hyracks.data.std.api.IValueReference;
  import org.apache.hyracks.storage.am.lsm.btree.column.api.AbstractColumnTupleReader;
  import org.apache.hyracks.storage.am.lsm.btree.column.api.projection.ColumnProjectorType;
  import org.apache.hyracks.storage.am.lsm.btree.column.api.projection.IColumnProjectionInfo;
  
  public abstract class AbstractColumnImmutableReadMetadata extends AbstractColumnImmutableMetadata
          implements IColumnProjectionInfo {
      private final ColumnProjectorType projectorType;
  
      protected AbstractColumnImmutableReadMetadata(ARecordType datasetType, ARecordType metaType,
              int numberOfPrimaryKeys, IValueReference serializedMetadata, int numberOfColumns,
              ColumnProjectorType projectorType) {
          super(datasetType, metaType, numberOfPrimaryKeys, serializedMetadata, numberOfColumns);
          this.projectorType = projectorType;
      }
  
      /**
       * @return the corresponding reader (merge reader or query reader) given <code>this</code> metadata
       */
      public abstract AbstractColumnTupleReader createTupleReader();
  
      @Override
      public final ColumnProjectorType getProjectorType() {
          return projectorType;
      }
  }
  