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.calcite.adapter.enumerable.impl;
  
  import org.apache.calcite.adapter.enumerable.WinAggResetContext;
  import org.apache.calcite.linq4j.tree.BlockBuilder;
  import org.apache.calcite.linq4j.tree.Expression;
  
  import java.util.List;
  
  /**
   * Implementation of
   * {@link org.apache.calcite.adapter.enumerable.WinAggResetContext}.
   */
  public class WinAggResetContextImpl extends AggResetContextImpl
      implements WinAggResetContext {
    private final Expression index;
    private final Expression startIndex;
    private final Expression endIndex;
    private final Expression frameRowCount;
    private final Expression partitionRowCount;
    private final Expression hasRows;
  
    /**
     * Creates window aggregate reset context.
     *
     * @param block code block that will contain the added initialization
     * @param accumulator accumulator variables that store the intermediate
     *                    aggregate state
     * @param index index of the current row in the partition
     * @param startIndex index of the very first row in partition
     * @param endIndex index of the very last row in partition
     * @param hasRows boolean expression that tells if the partition has rows
     * @param frameRowCount number of rows in the current frame
     * @param partitionRowCount number of rows in the current partition
     */
    public WinAggResetContextImpl(BlockBuilder block,
        List<Expression> accumulator, Expression index,
        Expression startIndex, Expression endIndex,
        Expression hasRows,
        Expression frameRowCount, Expression partitionRowCount) {
      super(block, accumulator);
      this.index = index;
      this.startIndex = startIndex;
      this.endIndex = endIndex;
      this.frameRowCount = frameRowCount;
      this.partitionRowCount = partitionRowCount;
      this.hasRows = hasRows;
    }
  
    @Override public Expression index() {
      return index;
    }
  
    @Override public Expression startIndex() {
      return startIndex;
    }
  
    @Override public Expression endIndex() {
      return endIndex;
    }
  
    @Override public Expression hasRows() {
      return hasRows;
    }
  
    @Override public Expression getFrameRowCount() {
      return frameRowCount;
    }
  
    @Override public Expression getPartitionRowCount() {
      return partitionRowCount;
    }
  }
  