com.github.nill14.utils.init.inject.ReflectionUtils Maven / Gradle / Ivy

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package com.github.nill14.utils.init.inject;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.List;
import java.util.Optional;
import java.util.stream.Stream;

import javax.inject.Provider;

import com.github.nill14.utils.init.api.BindingKey;
import com.github.nill14.utils.init.api.IScope;
import com.github.nill14.utils.init.binding.Binder;
import com.github.nill14.utils.init.binding.impl.BindingImpl;
import com.github.nill14.utils.init.binding.target.ProvidesMethodBindingTarget;
import com.github.nill14.utils.init.meta.AnnotationScanner;
import com.github.nill14.utils.init.meta.Provides;
import com.github.nill14.utils.init.scope.PrototypeScope;
import com.google.common.collect.Lists;
import com.google.common.reflect.TypeToken;
import com.google.common.reflect.TypeToken.TypeSet;

public enum ReflectionUtils {
	;
	
	@SuppressWarnings({ "unchecked" })
	public static  TypeToken getProviderReturnTypeToken(Class> providerClass) {
		try {
			return (TypeToken) TypeToken.of(providerClass.getMethod("get").getGenericReturnType());
		} catch (ReflectiveOperationException e) {
			throw new RuntimeException(e);
		}
	}
	
	@SuppressWarnings({ "unchecked" })
	public static  TypeToken getProviderReturnTypeToken(Provider provider) {
		return getProviderReturnTypeToken((Class>) provider.getClass());
	}
	
	@SuppressWarnings({ "unchecked" })
	public static  TypeToken getProviderReturnTypeToken(TypeToken> providerType) {
		return getProviderReturnTypeToken((Class>)providerType.getRawType());
	}
	
	public static boolean isClassPresent(String name) {
		try {
			Class.forName(name);
			return true;
		} catch(ClassNotFoundException e) {
			return false;
		}
		
	}
	
	
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public static List> scanProvidesBindings(Binder binder, Object module) {
		
		List> result = Lists.newArrayList();
		Class moduleClass = module.getClass();
		for (Method m : moduleClass.getDeclaredMethods()) {
			
			if (m.isAnnotationPresent(Provides.class)) {
				TypeToken typeToken = TypeToken.of(m.getGenericReturnType());
				ProvidesMethodBindingTarget