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;
  
  import java.io.IOException;
  import java.util.List;
  
  import org.apache.asterix.column.operation.lsm.flush.FlushColumnMetadata;
  import org.apache.asterix.column.operation.lsm.merge.MergeColumnTupleProjector;
  import org.apache.asterix.column.operation.lsm.merge.MergeColumnWriteMetadata;
  import org.apache.asterix.column.values.IColumnValuesReaderFactory;
  import org.apache.asterix.column.values.IColumnValuesWriterFactory;
  import org.apache.asterix.column.values.reader.ColumnValueReaderFactory;
  import org.apache.asterix.column.values.writer.ColumnValuesWriterFactory;
  import org.apache.asterix.om.types.ARecordType;
  import org.apache.commons.lang3.mutable.Mutable;
  import org.apache.commons.lang3.mutable.MutableObject;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.data.std.api.IValueReference;
  import org.apache.hyracks.storage.am.lsm.btree.column.api.IColumnManager;
  import org.apache.hyracks.storage.am.lsm.btree.column.api.IColumnMetadata;
  import org.apache.hyracks.storage.am.lsm.btree.column.api.IColumnTupleIterator;
  import org.apache.hyracks.storage.am.lsm.btree.column.api.IColumnWriteMultiPageOp;
  import org.apache.hyracks.storage.am.lsm.btree.column.api.projection.IColumnTupleProjector;
  
  public final class ColumnManager implements IColumnManager {
      private final ARecordType datasetType;
      private final ARecordType metaType;
      private final List<List<String>> primaryKeys;
      private final List<Integer> keySourceIndicator;
      private final MergeColumnTupleProjector mergeColumnTupleProjector;
  
      ColumnManager(ARecordType datasetType, ARecordType metaType, List<List<String>> primaryKeys,
              List<Integer> keySourceIndicator) {
          this.datasetType = datasetType;
          this.metaType = metaType;
          this.primaryKeys = primaryKeys;
          this.keySourceIndicator = keySourceIndicator;
          IColumnValuesReaderFactory readerFactory = new ColumnValueReaderFactory();
          mergeColumnTupleProjector =
                  new MergeColumnTupleProjector(datasetType, metaType, primaryKeys.size(), readerFactory);
      }
  
      @Override
      public int getNumberOfPrimaryKeys() {
          return primaryKeys.size();
      }
  
      @Override
      public IColumnMetadata activate() throws HyracksDataException {
          Mutable<IColumnWriteMultiPageOp> multiPageOpRef = new MutableObject<>();
          IColumnValuesWriterFactory factory = new ColumnValuesWriterFactory(multiPageOpRef);
          return new FlushColumnMetadata(datasetType, metaType, primaryKeys, keySourceIndicator, factory, multiPageOpRef);
      }
  
      @Override
      public IColumnMetadata activate(IValueReference metadata) throws HyracksDataException {
          try {
              Mutable<IColumnWriteMultiPageOp> multiPageOpRef = new MutableObject<>();
              IColumnValuesWriterFactory writerFactory = new ColumnValuesWriterFactory(multiPageOpRef);
              return FlushColumnMetadata.create(datasetType, metaType, primaryKeys.size(), keySourceIndicator,
                      writerFactory, multiPageOpRef, metadata);
          } catch (IOException e) {
              throw HyracksDataException.create(e);
          }
      }
  
      @Override
      public IColumnMetadata createMergeColumnMetadata(IValueReference metadata,
              List<IColumnTupleIterator> componentsTuples) throws HyracksDataException {
          try {
              return MergeColumnWriteMetadata.create(datasetType, metaType, primaryKeys.size(), new MutableObject<>(),
                      metadata, componentsTuples);
          } catch (IOException e) {
              throw HyracksDataException.create(e);
          }
  
      }
  
      @Override
      public IColumnTupleProjector getMergeColumnProjector() {
          return mergeColumnTupleProjector;
      }
  }
  