/*
 * 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.aop.internal.intercepted;

import io.micronaut.aop.InterceptedMethod;
import io.micronaut.aop.MethodInvocationContext;
import io.micronaut.core.async.publisher.Publishers;
import io.micronaut.core.type.ReturnType;

import java.util.concurrent.CompletionStage;
import java.util.concurrent.Future;

The InterceptedMethod utils class. 
Author:
Denis Stepanov
Since:
2.1.0/**
 * The {@link InterceptedMethod} utils class.
 *
 * @author Denis Stepanov
 * @since 2.1.0
 */
public class InterceptedMethodUtil {

    
Find possible InterceptedMethod implementation. 
Params:
context – The MethodInvocationContext
Returns:
The InterceptedMethod/**
     * Find possible {@link InterceptedMethod} implementation.
     *
     * @param context The {@link MethodInvocationContext}
     * @return The {@link InterceptedMethod}
     */
    public static InterceptedMethod of(MethodInvocationContext<?, ?> context) {
        ReturnType<?> returnType = context.getReturnType();
        Class<?> returnTypeClass = returnType.getType();
        if (returnTypeClass == void.class || returnTypeClass == String.class) {
            // Micro Optimization
            return new SynchronousInterceptedMethod(context);
        } else if (CompletionStage.class.isAssignableFrom(returnTypeClass) || Future.class.isAssignableFrom(returnTypeClass)) {
            return new CompletionStageInterceptedMethod(context);
        } else if (Publishers.isConvertibleToPublisher(returnTypeClass)) {
            return new PublisherInterceptedMethod(context);
        } else {
            KotlinInterceptedMethod kotlinInterceptedMethod = KotlinInterceptedMethod.of(context);
            if (kotlinInterceptedMethod != null) {
                return kotlinInterceptedMethod;
            }
            return new SynchronousInterceptedMethod(context);
        }
    }

}