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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.SyntheticAddress.decodePosition;
import static com.facebook.presto.operator.SyntheticAddress.decodeSliceIndex;
import static com.google.common.base.Preconditions.checkNotNull;
        implements PagesIndexComparator
    private final List<IntegersortChannels;
    private final List<SortOrdersortOrders;
    private final List<TypesortTypes;
    public SimplePagesIndexComparator(List<TypesortTypesList<IntegersortChannelsList<SortOrdersortOrders)
    {
        this. = ImmutableList.copyOf(checkNotNull(sortTypes"sortTypes is null"));
        this. = ImmutableList.copyOf(checkNotNull(sortChannels"sortChannels is null"));
        this. = ImmutableList.copyOf(checkNotNull(sortOrders"sortOrders is null"));
    }
    @Override
    public int compareTo(PagesIndex pagesIndexint leftPositionint rightPosition)
    {
        long leftPageAddress = pagesIndex.getValueAddresses().getLong(leftPosition);
        int leftBlockIndex = decodeSliceIndex(leftPageAddress);
        int leftBlockPosition = decodePosition(leftPageAddress);
        long rightPageAddress = pagesIndex.getValueAddresses().getLong(rightPosition);
        int rightBlockIndex = decodeSliceIndex(rightPageAddress);
        int rightBlockPosition = decodePosition(rightPageAddress);
        for (int i = 0; i < .size(); i++) {
            int sortChannel = .get(i);
            Block leftBlock = pagesIndex.getChannel(sortChannel).get(leftBlockIndex);
            Block rightBlock = pagesIndex.getChannel(sortChannel).get(rightBlockIndex);
            SortOrder sortOrder = .get(i);
            int compare = sortOrder.compareBlockValue(.get(i), leftBlockleftBlockPositionrightBlockrightBlockPosition);
            if (compare != 0) {
                return compare;
            }
        }
        return 0;
    }
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