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.expr;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.UUID;
  
  import org.apache.carbondata.core.index.IndexFilter;
  import org.apache.carbondata.core.index.IndexInputSplit;
  import org.apache.carbondata.core.index.IndexLevel;
  import org.apache.carbondata.core.index.Segment;
  import org.apache.carbondata.core.index.TableIndex;
  import org.apache.carbondata.core.index.dev.Index;
  import org.apache.carbondata.core.indexstore.ExtendedBlocklet;
  import org.apache.carbondata.core.indexstore.PartitionSpec;
  import org.apache.carbondata.core.metadata.schema.table.IndexSchema;
  import org.apache.carbondata.core.scan.filter.resolver.FilterResolverIntf;
  
  public class IndexExprWrapperImpl extends IndexExprWrapper {
  
    private static final long serialVersionUID = -6240385328696074171L;
  
    private transient TableIndex index;
  
    private FilterResolverIntf expression;
  
    private String uniqueId;
  
    public IndexExprWrapperImpl(TableIndex index, FilterResolverIntf expression) {
      this.index = index;
      this.expression = expression;
      this.uniqueId = UUID.randomUUID().toString();
    }
  
    @Override
    public List<ExtendedBlocklet> prune(List<Segment> segments, List<PartitionSpec> partitionsToPrune)
        throws IOException {
      return index.prune(segments, new IndexFilter(expression), partitionsToPrune);
    }
  
    public List<ExtendedBlocklet> prune(IndexInputSplit distributable,
        List<PartitionSpec> partitionsToPrune)
        throws IOException {
      List<Index> indices = index.getTableIndexes(distributable);
      return index.prune(indices, distributable, expression, partitionsToPrune);
    }
  
    @Override
    public List<ExtendedBlocklet> pruneBlocklets(List<ExtendedBlocklet> blocklets) {
      List<ExtendedBlocklet> blockletList = new ArrayList<>();
      for (ExtendedBlocklet blocklet: blocklets) {
        if (blocklet.getIndexUniqueId().equals(uniqueId)) {
          blockletList.add(blocklet);
        }
      }
      return blockletList;
    }
  
    @Override
    public FilterResolverIntf getFilterResolverIntf() {
      return expression;
    }
  
    @Override
    public FilterResolverIntf getFilterResolverIntf(String uniqueId) {
      if (this.uniqueId.equals(uniqueId)) {
        return expression;
      }
      return null;
    }
  
    @Override
    public List<IndexInputSplitWrapper> toDistributable(List<Segment> segments) {
      List<IndexInputSplit> indexInputSplits = index.toDistributable(segments);
      List<IndexInputSplitWrapper> wrappers = new ArrayList<>();
      for (IndexInputSplit distributable : indexInputSplits) {
        wrappers.add(new IndexInputSplitWrapper(uniqueId, distributable));
      }
      return wrappers;
    }
  
    @Override
    public IndexLevel getIndexLevel() {
      return index.getIndexFactory().getIndexLevel();
    }
  
    public IndexSchema getIndexSchema() {
      return index.getIndexSchema();
    }
  
    @Override
    public IndexExprWrapper getLeftIndexWrapper() {
      return null;
    }
  
    @Override
    public IndexExprWrapper getRightIndexWrapper() {
      return null;
    }
  
    /**
     * Convert segment to distributable object.
     */
    public IndexInputSplitWrapper toDistributableSegment(Segment segment)
        throws IOException {
      return index.toDistributableSegment(segment, uniqueId);
    }
  }
  