/*
* 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.sql.gen;
import com.facebook.presto.bytecode.BytecodeNode;
import com.facebook.presto.metadata.FunctionRegistry;
import com.facebook.presto.metadata.Signature;
import com.facebook.presto.operator.scalar.ScalarFunctionImplementation;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.sql.relational.RowExpression;
import java.util.ArrayList;
import java.util.List;
public class FunctionCallCodeGenerator
implements BytecodeGenerator
{
@Override
public BytecodeNode generateExpression(Signature signature, BytecodeGeneratorContext context, Type returnType, List<RowExpression> arguments)
{
FunctionRegistry registry = context.getRegistry();
ScalarFunctionImplementation function = registry.getScalarFunctionImplementation(signature);
List<BytecodeNode> argumentsBytecode = new ArrayList<>();
for (RowExpression argument : arguments) {
argumentsBytecode.add(context.generate(argument));
}
return context.generateCall(signature.getName(), function, argumentsBytecode);
}
}