io.prestosql.tests.statistics.StatsContext Maven / Gradle / Ivy
/*
* 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.prestosql.tests.statistics;
import com.google.common.collect.ImmutableMap;
import io.prestosql.spi.type.Type;
import io.prestosql.sql.planner.Symbol;
import io.prestosql.sql.planner.TypeProvider;
import java.util.Map;
import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;
public class StatsContext
{
private final Map columnSymbols;
private final TypeProvider types;
public StatsContext(Map columnSymbols, TypeProvider types)
{
this.columnSymbols = ImmutableMap.copyOf(columnSymbols);
this.types = requireNonNull(types, "symbolTypes is null");
}
public Symbol getSymbolForColumn(String columnName)
{
checkArgument(columnSymbols.containsKey(columnName), "no symbol found for column '" + columnName + "'");
return columnSymbols.get(columnName);
}
public Type getTypeForSymbol(Symbol symbol)
{
return types.get(symbol);
}
}