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.core.index.dev.fgindex;
  
  import java.io.DataInput;
  import java.io.DataOutput;
  import java.io.IOException;
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.BitSet;
  import java.util.List;
  
  import org.apache.carbondata.common.annotations.InterfaceAudience;
  import org.apache.carbondata.common.annotations.InterfaceStability;
  import org.apache.carbondata.core.constants.CarbonV3DataFormatConstants;
  
  import org.apache.carbondata.core.indexstore.Blocklet;
  import org.apache.carbondata.core.metadata.schema.table.Writable;
  import org.apache.carbondata.core.util.BitSetGroup;
  
  /**
   * Used for returning matched rows after pruned by {@link FineGrainIndex}
   */
  @InterfaceAudience.Developer("Index")
  @InterfaceStability.Evolving
  public class FineGrainBlocklet extends Blocklet implements Serializable {
  
    private List<Page> pages;
  
    /** For FG, pass the shardName instead of file name */
    public FineGrainBlocklet(String shardName, String blockletId, List<Page> pages) {
      super(shardName, blockletId);
      this.pages = pages;
    }
  
    // For serialization purpose
    public FineGrainBlocklet() {
  
    }
  
    public List<Page> getPages() {
      return pages;
    }
  
    public static class Page implements Writable, Serializable {
  
      private int pageId;
  
      private int[] rowId;
  
      public BitSet getBitSet() {
        BitSet bitSet =
            new BitSet(CarbonV3DataFormatConstants.NUMBER_OF_ROWS_PER_BLOCKLET_COLUMN_PAGE_DEFAULT);
        for (int row : rowId) {
          bitSet.set(row);
        }
        return bitSet;
      }
  
      @Override
      public void write(DataOutput out) throws IOException {
        out.writeInt(pageId);
        out.writeInt(rowId.length);
        for (int i = 0; i < rowId.length; i++) {
          out.writeInt(rowId[i]);
        }
      }
  
      @Override
      public void readFields(DataInput in) throws IOException {
        pageId = in.readInt();
        int length = in.readInt();
        rowId = new int[length];
        for (int i = 0; i < length; i++) {
          rowId[i] = in.readInt();
        }
      }
  
      public void setPageId(int pageId) {
        this.pageId = pageId;
      }
  
      public void setRowId(int[] rowId) {
        this.rowId = rowId;
      }
    }
  
    public BitSetGroup getBitSetGroup(int numberOfPages) {
      BitSetGroup bitSetGroup = new BitSetGroup(numberOfPages);
      for (Page page : pages) {
        bitSetGroup.setBitSet(page.getBitSet(), page.pageId);
      }
      return bitSetGroup;
    }
  
    @Override
    public void write(DataOutput out) throws IOException {
      super.write(out);
      int size = pages.size();
      out.writeInt(size);
      for (Page page : pages) {
        page.write(out);
      }
    }
  
    @Override
    public void readFields(DataInput in) throws IOException {
      super.readFields(in);
      int size = in.readInt();
      pages = new ArrayList<>(size);
      for (int i = 0; i < size; i++) {
        Page page = new Page();
        page.readFields(in);
        pages.add(page);
      }
    }
  
    @Override
    public boolean equals(Object o) {
      return super.equals(o);
    }
  
    @Override
    public int hashCode() {
      return super.hashCode();
    }
  }
  