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.carbondata.index.secondary;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  import java.util.stream.Collectors;
  
  import org.apache.carbondata.common.annotations.InterfaceAudience;
  import org.apache.carbondata.common.exceptions.sql.MalformedIndexCommandException;
  import org.apache.carbondata.common.logging.LogServiceFactory;
  import org.apache.carbondata.core.datastore.block.SegmentProperties;
  import org.apache.carbondata.core.features.TableOperation;
  import org.apache.carbondata.core.index.IndexFilter;
  import org.apache.carbondata.core.index.IndexInputSplit;
  import org.apache.carbondata.core.index.IndexMeta;
  import org.apache.carbondata.core.index.IndexStoreManager;
  import org.apache.carbondata.core.index.Segment;
  import org.apache.carbondata.core.index.dev.IndexBuilder;
  import org.apache.carbondata.core.index.dev.IndexWriter;
  import org.apache.carbondata.core.index.dev.cgindex.CoarseGrainIndex;
  import org.apache.carbondata.core.index.dev.cgindex.CoarseGrainIndexFactory;
  import org.apache.carbondata.core.metadata.AbsoluteTableIdentifier;
  import org.apache.carbondata.core.metadata.schema.table.CarbonTable;
  import org.apache.carbondata.core.metadata.schema.table.IndexSchema;
  import org.apache.carbondata.core.scan.filter.intf.ExpressionType;
  import org.apache.carbondata.events.Event;
  import org.apache.carbondata.index.secondary.SecondaryIndexModel.PositionReferenceInfo;
  
  import org.apache.hadoop.fs.Path;
  import org.apache.log4j.Logger;
  
  /**
   * Index Factory for Secondary Index.
   */
  @InterfaceAudience.Internal
  public class SecondaryIndexFactory extends CoarseGrainIndexFactory {
    private static final Logger LOGGER =
        LogServiceFactory.getLogService(SecondaryIndexFactory.class.getName());
    private IndexMeta indexMeta;
  
    public SecondaryIndexFactory(CarbonTable carbonTable, IndexSchema indexSchema)
        throws MalformedIndexCommandException {
      super(carbonTable, indexSchema);
      List<ExpressionType> operations = new ArrayList<>(Arrays.asList(ExpressionType.values()));
      indexMeta = new IndexMeta(indexSchema.getIndexName(),
          carbonTable.getIndexedColumns(indexSchema.getIndexColumns()), operations);
      LOGGER.info("Created Secondary Index Factory instance for " + indexSchema.getIndexName());
    }
  
    @Override
    public IndexWriter createWriter(Segment segment, String shardName,
        SegmentProperties segmentProperties) throws IOException {
      throw new UnsupportedOperationException("Not supported for Secondary Index");
    }
  
    @Override
    public IndexBuilder createBuilder(Segment segment, String shardName,
        SegmentProperties segmentProperties) throws IOException {
      throw new UnsupportedOperationException("Not supported for Secondary Index");
    }
  
    @Override
    public IndexMeta getMeta() {
      return indexMeta;
    }
  
    private Map<Segment, List<CoarseGrainIndex>> getIndexes(List<Segment> segments,
        PositionReferenceInfo positionReferenceInfo) throws IOException {
      Map<Segment, List<CoarseGrainIndex>> indexes = new HashMap<>();
      List<String> allSegmentIds =
          segments.stream().map(Segment::getSegmentNo).collect(Collectors.toList());
      for (Segment segment : segments) {
        indexes.put(segment, this.getIndexes(segment, allSegmentIds, positionReferenceInfo));
      }
      return indexes;
    }
  
    private List<CoarseGrainIndex> getIndexes(Segment segment, List<String> allSegmentIds,
        PositionReferenceInfo positionReferenceInfo) throws IOException {
      List<CoarseGrainIndex> indexes = new ArrayList<>();
      SecondaryIndex secondaryIndex = new SecondaryIndex();
      secondaryIndex.init(
          new SecondaryIndexModel(getIndexSchema().getIndexName(), segment.getSegmentNo(),
              allSegmentIds, positionReferenceInfo, segment.getConfiguration()));
      secondaryIndex.setDefaultIndexPrunedBlocklet(segment.getDefaultIndexPrunedBlocklets());
      String indexTablePath = getCarbonTable().getTablePath()
          .replace(getCarbonTable().getTableName(), getIndexSchema().getIndexName());
      AbsoluteTableIdentifier identifier =
          AbsoluteTableIdentifier.from(indexTablePath, getCarbonTable().getDatabaseName(),
              getIndexSchema().getIndexName());
      String tblStatusVersion =
          IndexStoreManager.getInstance().getCarbonTable(identifier).getTableStatusVersion();
      secondaryIndex.validateSegmentList(indexTablePath, tblStatusVersion);
      indexes.add(secondaryIndex);
      return indexes;
    }
  
    @Override
    public Map<Segment, List<CoarseGrainIndex>> getIndexes(List<Segment> segments, IndexFilter filter)
        throws IOException {
      return getIndexes(segments, new PositionReferenceInfo());
    }
  
    @Override
    public Map<Segment, List<CoarseGrainIndex>> getIndexes(List<Segment> segments,
        Set<Path> partitionLocations, IndexFilter filter) throws IOException {
      return getIndexes(segments, new PositionReferenceInfo());
    }
  
    @Override
    public List<CoarseGrainIndex> getIndexes(Segment segment) throws IOException {
      List<String> allSegmentIds = new ArrayList<>();
      allSegmentIds.add(segment.getSegmentNo());
      return getIndexes(segment, allSegmentIds, new PositionReferenceInfo());
    }
  
    @Override
    public List<CoarseGrainIndex> getIndexes(Segment segment, Set<Path> partitionLocations)
        throws IOException {
      return getIndexes(segment);
    }
  
    @Override
    public List<CoarseGrainIndex> getIndexes(IndexInputSplit distributable) throws IOException {
      throw new UnsupportedOperationException("Not supported for Secondary Index");
    }
  
    @Override
    public List<IndexInputSplit> toDistributable(Segment segment) {
      throw new UnsupportedOperationException("Not supported for Secondary Index");
    }
  
    @Override
    public void fireEvent(Event event) {
    }
  
    @Override
    public void clear(String segment) {
    }
  
    @Override
    public synchronized void clear() {
    }
  
    @Override
    public void deleteIndexData(Segment segment) throws IOException {
    }
  
    @Override
    public void deleteIndexData() {
    }
  
    @Override
    public boolean willBecomeStale(TableOperation operation) {
      return false;
    }
  
    @Override
    public String getCacheSize() {
      return "0:0";
    }
  }
  