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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 io.trino.sql.planner.plan;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.ImmutableMap;
import com.google.errorprone.annotations.DoNotCall;
import io.trino.spi.statistics.ColumnStatisticMetadata;
import io.trino.spi.statistics.TableStatisticType;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.function.Function;
import static com.google.common.base.MoreObjects.toStringHelper;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static com.google.common.collect.ImmutableMap.toImmutableMap;
import static java.util.Objects.requireNonNull;
public class StatisticAggregationsDescriptor
{
private final Map grouping;
private final Map tableStatistics;
private final Map columnStatistics;
public static StatisticAggregationsDescriptor empty()
{
return StatisticAggregationsDescriptor.builder().build();
}
public StatisticAggregationsDescriptor(
Map grouping,
Map tableStatistics,
Map columnStatistics)
{
this.grouping = ImmutableMap.copyOf(requireNonNull(grouping, "grouping is null"));
this.tableStatistics = ImmutableMap.copyOf(requireNonNull(tableStatistics, "tableStatistics is null"));
this.columnStatistics = ImmutableMap.copyOf(requireNonNull(columnStatistics, "columnStatistics is null"));
}
@JsonCreator
@DoNotCall // for JSON serialization only
public static StatisticAggregationsDescriptor fromJson(
@JsonProperty("grouping") Map grouping,
@JsonProperty("tableStatistics") Map tableStatistics,
@JsonProperty("columnStatisticsList") List> columnStatistics)
{
return new StatisticAggregationsDescriptor<>(
grouping,
tableStatistics,
columnStatistics.stream()
.collect(toImmutableMap(ColumnStatisticAggregationsDescriptor::metadata, ColumnStatisticAggregationsDescriptor::input)));
}
@JsonProperty
public Map getGrouping()
{
return grouping;
}
@JsonProperty
public Map getTableStatistics()
{
return tableStatistics;
}
@JsonIgnore
public Map getColumnStatistics()
{
return columnStatistics;
}
@JsonProperty
@DoNotCall // for JSON serialization only
public final List> getColumnStatisticsList()
{
return columnStatistics.entrySet().stream()
.map(entry -> new ColumnStatisticAggregationsDescriptor(entry.getKey(), entry.getValue()))
.collect(toImmutableList());
}
@Override
public boolean equals(Object o)
{
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
StatisticAggregationsDescriptor that = (StatisticAggregationsDescriptor) o;
return Objects.equals(grouping, that.grouping) &&
Objects.equals(tableStatistics, that.tableStatistics) &&
Objects.equals(columnStatistics, that.columnStatistics);
}
@Override
public int hashCode()
{
return Objects.hash(grouping, tableStatistics, columnStatistics);
}
@Override
public String toString()
{
return toStringHelper(this)
.add("grouping", grouping)
.add("tableStatistics", tableStatistics)
.add("columnStatistics", columnStatistics)
.toString();
}
public static Builder builder()
{
return new Builder<>();
}
public StatisticAggregationsDescriptor map(Function mapper)
{
return new StatisticAggregationsDescriptor<>(
map(this.getGrouping(), mapper),
map(this.getTableStatistics(), mapper),
map(this.getColumnStatistics(), mapper));
}
private static Map map(Map input, Function mapper)
{
return input.entrySet()
.stream()
.collect(toImmutableMap(Map.Entry::getKey, entry -> mapper.apply(entry.getValue())));
}
public static class Builder
{
private final ImmutableMap.Builder grouping = ImmutableMap.builder();
private final ImmutableMap.Builder tableStatistics = ImmutableMap.builder();
private final ImmutableMap.Builder columnStatistics = ImmutableMap.builder();
public void addGrouping(String column, T key)
{
grouping.put(column, key);
}
public void addTableStatistic(TableStatisticType type, T key)
{
tableStatistics.put(type, key);
}
public void addColumnStatistic(ColumnStatisticMetadata statisticMetadata, T key)
{
columnStatistics.put(statisticMetadata, key);
}
public StatisticAggregationsDescriptor build()
{
return new StatisticAggregationsDescriptor<>(grouping.buildOrThrow(), tableStatistics.buildOrThrow(), columnStatistics.buildOrThrow());
}
}
public record ColumnStatisticAggregationsDescriptor(ColumnStatisticMetadata metadata, T input) {}
}
