io.trino.sql.gen.LambdaCapture 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.sql.gen;
import java.lang.invoke.CallSite;
import java.lang.invoke.LambdaConversionException;
import java.lang.invoke.LambdaMetafactory;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.reflect.Method;
public final class LambdaCapture
{
public static final Method LAMBDA_CAPTURE_METHOD;
static {
try {
LAMBDA_CAPTURE_METHOD = LambdaCapture.class.getMethod("lambdaCapture", MethodHandles.Lookup.class, String.class, MethodType.class, MethodType.class, MethodHandle.class, MethodType.class);
}
catch (NoSuchMethodException e) {
throw new RuntimeException(e);
}
}
private LambdaCapture()
{
}
public static CallSite lambdaCapture(
MethodHandles.Lookup callerLookup,
String name,
MethodType type,
MethodType samMethodType,
MethodHandle implMethod,
MethodType instantiatedMethodType)
{
try {
// delegate to metafactory, we may choose to generate code ourselves in the future.
return LambdaMetafactory.metafactory(
callerLookup,
name,
type,
samMethodType,
implMethod,
instantiatedMethodType);
}
catch (LambdaConversionException e) {
throw new RuntimeException(e);
}
}
}