io.trino.metadata.CatalogTableFunctions 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.trino.metadata;
import com.google.common.collect.Maps;
import com.google.errorprone.annotations.ThreadSafe;
import io.trino.spi.function.SchemaFunctionName;
import io.trino.spi.function.table.ConnectorTableFunction;
import java.util.Collection;
import java.util.Map;
import java.util.Optional;
import static java.util.Locale.ENGLISH;
import static java.util.Objects.requireNonNull;
@ThreadSafe
public class CatalogTableFunctions
{
// schema and function name in lowercase
private final Map functions;
public CatalogTableFunctions(Collection functions)
{
requireNonNull(functions, "functions is null");
this.functions = Maps.uniqueIndex(functions, function -> lowerCaseSchemaFunctionName(new SchemaFunctionName(function.getSchema(), function.getName())));
}
public Optional getTableFunction(SchemaFunctionName schemaFunctionName)
{
return Optional.ofNullable(functions.get(lowerCaseSchemaFunctionName(schemaFunctionName)));
}
private static SchemaFunctionName lowerCaseSchemaFunctionName(SchemaFunctionName name)
{
return new SchemaFunctionName(
name.getSchemaName().toLowerCase(ENGLISH),
name.getFunctionName().toLowerCase(ENGLISH));
}
}