io.micronaut.inject.beans.KotlinExecutableMethodUtils Maven / Gradle / Ivy
/*
* Copyright 2017-2020 original authors
*
* 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
*
* https://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.micronaut.inject.beans;
import io.micronaut.core.annotation.Internal;
import io.micronaut.core.type.Argument;
import io.micronaut.inject.ExecutableMethod;
import kotlin.Unit;
import io.micronaut.core.annotation.NonNull;
import static io.micronaut.core.util.KotlinUtils.KOTLIN_COROUTINES_SUPPORTED;
/**
* Internal Utility methods for working with Kotlin suspend functions
.
*
* @author Konrad Kamiński
* @since 1.3.0
*/
@Internal
public final class KotlinExecutableMethodUtils {
/**
* Kotlin suspend function return type check.
*
* @param method method to be checked
* @return True if given suspend function's return type is Unit.
*/
public static boolean isKotlinFunctionReturnTypeUnit(@NonNull ExecutableMethod method) {
if (KOTLIN_COROUTINES_SUPPORTED) {
final Argument[] arguments = method.getArguments();
final int argumentsLength = arguments.length;
if (argumentsLength > 0) {
final Argument[] params = arguments[argumentsLength - 1].getTypeParameters();
return params.length == 1 && params[0].getType() == Unit.class;
}
}
return false;
}
}