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 /*
  * Licensed 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 com.facebook.presto.operator;
import static com.facebook.presto.operator.GroupByHash.createGroupByHash;
import static com.facebook.presto.spi.type.BooleanType.BOOLEAN;
public class MarkDistinctHash
    private final GroupByHash groupByHash;
    private long nextDistinctId;
    public MarkDistinctHash(List<Typetypesint[] channelsOptional<IntegerhashChannel)
    {
        this(typeschannelshashChannel, 10_000);
    }
    public MarkDistinctHash(List<Typetypesint[] channelsOptional<IntegerhashChannelint expectedDistinctValues)
    {
        this. = createGroupByHash(typeschannels, Optional.<Integer>empty(), hashChannelexpectedDistinctValues);
    }
    public long getEstimatedSize()
    {
        return .getEstimatedSize();
    }
    public Block markDistinctRows(Page page)
    {
        GroupByIdBlock ids = .getGroupIds(page);
        BlockBuilder blockBuilder = .createBlockBuilder(new BlockBuilderStatus(), ids.getPositionCount());
        for (int i = 0; i < ids.getPositionCount(); i++) {
            if (ids.getGroupId(i) == ) {
                .writeBoolean(blockBuildertrue);
                ++;
            }
            else {
                .writeBoolean(blockBuilderfalse);
            }
        }
        return blockBuilder.build();
    }
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