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.scan.result.iterator;
  
  import java.util.List;
  
  import org.apache.carbondata.common.CarbonIterator;
  import org.apache.carbondata.core.scan.result.RowBatch;
  
  /**
   * Iterator over row result
   */
  public class ChunkRowIterator extends CarbonIterator<Object[]> {
  
    /**
     * iterator over chunk result
     */
    private CarbonIterator<RowBatch> iterator;
  
    /**
     * current chunk
     */
    private RowBatch currentChunk;
  
    public ChunkRowIterator(CarbonIterator<RowBatch> iterator) {
      this.iterator = iterator;
    }
  
    /**
     * Returns {@code true} if the iteration has more elements. (In other words,
     * returns {@code true} if {@link #next} would return an element rather than
     * throwing an exception.)
     *
     * @return {@code true} if the iteration has more elements
     */
    @Override
    public boolean hasNext() {
      if (currentChunk != null && currentChunk.hasNext()) {
        return true;
      } else if (iterator != null && iterator.hasNext()) {
        currentChunk = iterator.next();
        return hasNext();
      }
      return false;
    }
  
    /**
     * Returns the next element in the iteration.
     *
     * @return the next element in the iteration
     */
    @Override
    public Object[] next() {
      return currentChunk.next();
    }
  
    public String getCarbonDataFileWrittenVersion() {
      return currentChunk.getCarbonDataFileWrittenVersion();
    }
  
    /**
     * read next batch
     *
     * @return list of batch result
     */
    public List<Object[]> nextBatch() {
      return currentChunk.nextBatch();
    }
  
  }
  