/*
* 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.window;
import com.facebook.presto.metadata.BoundVariables;
import com.facebook.presto.metadata.FunctionRegistry;
import com.facebook.presto.metadata.Signature;
import com.facebook.presto.metadata.SqlFunction;
import com.facebook.presto.spi.type.TypeManager;
import static java.util.Objects.requireNonNull;
public class SqlWindowFunction
implements SqlFunction
{
private final WindowFunctionSupplier supplier;
public SqlWindowFunction(WindowFunctionSupplier supplier)
{
this.supplier = requireNonNull(supplier, "supplier is null");
}
@Override
public final Signature getSignature()
{
return supplier.getSignature();
}
@Override
public boolean isHidden()
{
return false;
}
@Override
public boolean isDeterministic()
{
return true;
}
@Override
public String getDescription()
{
return supplier.getDescription();
}
public WindowFunctionSupplier specialize(BoundVariables boundVariables, int arity, TypeManager typeManager, FunctionRegistry functionRegistry)
{
return supplier;
}
}