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[reflect] Move lambda gen to LambdaFactory

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This commit is contained in:
Johannes Frohnmeyer 2022-09-26 19:55:52 +02:00
parent ea06c7009d
commit f9782a1ef5
Signed by: Johannes
GPG Key ID: E76429612C2929F4
2 changed files with 118 additions and 132 deletions
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79
src/main/java/io/gitlab/jfronny/commons/reflect/LambdaFactory.java Normal file
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@ -0,0 +1,79 @@
package io.gitlab.jfronny.commons.reflect;
import java.lang.invoke.*;
import java.util.function.*;
@SuppressWarnings("unchecked")
public class LambdaFactory {
private static final MethodHandles.Lookup LOOKUP_ROOT = MethodHandles.lookup();
public static MethodHandles.Lookup lookup(Class<?> klazz) throws IllegalAccessException {
return MethodHandles.privateLookupIn(klazz, LOOKUP_ROOT);
}
public static Runnable runnable(MethodHandles.Lookup lookup, MethodHandle handle) throws Throwable {
return (Runnable) LambdaMetafactory.metafactory(
lookup,
"run",
MethodType.methodType(Runnable.class),
MethodType.methodType(Void.TYPE),
handle,
MethodType.methodType(Void.TYPE)
).getTarget().invoke();
}
public static <TIn> Consumer<TIn> consumer(MethodHandles.Lookup lookup, MethodHandle handle, Class<TIn> parameterType) throws Throwable {
return (Consumer<TIn>) LambdaMetafactory.metafactory(
lookup,
"accept",
MethodType.methodType(Consumer.class),
MethodType.methodType(Void.TYPE, Object.class),
handle,
MethodType.methodType(Void.TYPE, parameterType)
).getTarget().invoke();
}
public static <TIn1, TIn2> BiConsumer<TIn1, TIn2> consumer(MethodHandles.Lookup lookup, MethodHandle handle, Class<TIn1> parameterType1, Class<TIn2> parameterType2) throws Throwable {
return (BiConsumer<TIn1, TIn2>) LambdaMetafactory.metafactory(
lookup,
"accept",
MethodType.methodType(BiConsumer.class),
MethodType.methodType(Void.TYPE, Object.class, Object.class),
handle,
MethodType.methodType(Void.TYPE, parameterType1, parameterType2)
).getTarget().invoke();
}
public static <TOut> Supplier<TOut> supplier(MethodHandles.Lookup lookup, MethodHandle handle, Class<TOut> returnType) throws Throwable {
return (Supplier<TOut>) LambdaMetafactory.metafactory(
lookup,
"get",
MethodType.methodType(Supplier.class),
MethodType.methodType(Object.class),
handle,
MethodType.methodType(returnType)
).getTarget().invoke();
}
public static <TIn, TOut> Function<TIn, TOut> function(MethodHandles.Lookup lookup, MethodHandle handle, Class<TOut> returnType, Class<TIn> parameterType) throws Throwable {
return (Function<TIn, TOut>) LambdaMetafactory.metafactory(
lookup,
"apply",
MethodType.methodType(Function.class),
MethodType.methodType(Object.class, Object.class),
handle,
MethodType.methodType(returnType, parameterType)
).getTarget().invoke();
}
public static <TIn1, TIn2, TOut> BiFunction<TIn1, TIn2, TOut> function(MethodHandles.Lookup lookup, MethodHandle handle, Class<TOut> returnType, Class<TIn1> parameterType1, Class<TIn2> parameterType2) throws Throwable {
return (BiFunction<TIn1, TIn2, TOut>) LambdaMetafactory.metafactory(
lookup,
"apply",
MethodType.methodType(BiFunction.class),
MethodType.methodType(Object.class, Object.class, Object.class),
handle,
MethodType.methodType(returnType, parameterType1, parameterType2)
).getTarget().invoke();
}
}

171
src/main/java/io/gitlab/jfronny/commons/reflect/Reflect.java
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@ -4,108 +4,78 @@ import io.gitlab.jfronny.commons.throwable.ThrowingBiFunction;
import io.gitlab.jfronny.commons.throwable.ThrowingFunction;
import io.gitlab.jfronny.commons.throwable.ThrowingSupplier;
import java.lang.invoke.*;
import java.lang.invoke.MethodHandles;
import java.util.function.*;
@SuppressWarnings("unchecked")
public class Reflect {
private static final MethodHandles.Lookup LOOKUP_ROOT = MethodHandles.lookup();
@Deprecated
public static <TOut> ThrowingSupplier<TOut, ReflectiveOperationException> getConstructor(Class<?> toConstruct) throws Throwable {
public static <TOut> ThrowingSupplier<TOut, ReflectiveOperationException> getConstructor(Class<TOut> toConstruct) throws Throwable {
Supplier<TOut> constructor = constructor(toConstruct);
return constructor::get;
}
@Deprecated
public static <TOut> ThrowingSupplier<TOut, ReflectiveOperationException> getConstructor(String targetClassName) throws Throwable {
return getConstructor(Class.forName(targetClassName));
return Reflect.getConstructor((Class<TOut>) Class.forName(targetClassName));
}
@Deprecated
public static <TIn, TOut> ThrowingFunction<TIn, TOut, ReflectiveOperationException> getConstructor(Class<?> toConstruct, Class<TIn> parameterType) throws Throwable {
public static <TIn, TOut> ThrowingFunction<TIn, TOut, ReflectiveOperationException> getConstructor(Class<TOut> toConstruct, Class<TIn> parameterType) throws Throwable {
Function<TIn, TOut> constructor = constructor(toConstruct, parameterType);
return constructor::apply;
}
@Deprecated
public static <TIn, TOut> ThrowingFunction<TIn, TOut, ReflectiveOperationException> getConstructor(String targetClassName, Class<TIn> parameterType) throws Throwable {
return getConstructor(Class.forName(targetClassName), parameterType);
return getConstructor((Class<TOut>) Class.forName(targetClassName), parameterType);
}
@Deprecated
public static <TIn1, TIn2, TOut> ThrowingBiFunction<TIn1, TIn2, TOut, ReflectiveOperationException> getConstructor(Class<?> toConstruct, Class<TIn1> parameterType1, Class<TIn2> parameterType2) throws Throwable {
public static <TIn1, TIn2, TOut> ThrowingBiFunction<TIn1, TIn2, TOut, ReflectiveOperationException> getConstructor(Class<TOut> toConstruct, Class<TIn1> parameterType1, Class<TIn2> parameterType2) throws Throwable {
BiFunction<TIn1, TIn2, TOut> constructor = constructor(toConstruct, parameterType1, parameterType2);
return constructor::apply;
}
@Deprecated
public static <TIn1, TIn2, TOut> ThrowingBiFunction<TIn1, TIn2, TOut, ReflectiveOperationException> getConstructor(String targetClassName, Class<TIn1> parameterType1, Class<TIn2> parameterType2) throws Throwable {
return getConstructor(Class.forName(targetClassName), parameterType1, parameterType2);
return getConstructor((Class<TOut>) Class.forName(targetClassName), parameterType1, parameterType2);
}
// Constructor without parameters
public static <TOut> Supplier<TOut> constructor(Class<?> toConstruct) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(toConstruct, LOOKUP_ROOT);
return (Supplier<TOut>) LambdaMetafactory.metafactory(
lookup,
"get",
MethodType.methodType(Supplier.class),
MethodType.methodType(Object.class),
lookup.unreflectConstructor(toConstruct.getDeclaredConstructor()),
MethodType.methodType(toConstruct)
).getTarget().invoke();
public static <TOut> Supplier<TOut> constructor(Class<TOut> toConstruct) throws Throwable {
MethodHandles.Lookup lookup = LambdaFactory.lookup(toConstruct);
return LambdaFactory.supplier(lookup, lookup.unreflectConstructor(toConstruct.getDeclaredConstructor()), toConstruct);
}
public static <TOut> Supplier<TOut> constructor(String targetClassName) throws Throwable {
return constructor(Class.forName(targetClassName));
return (Supplier<TOut>) constructor(Class.forName(targetClassName));
}
// Constructor with one parameter
public static <TIn, TOut> Function<TIn, TOut> constructor(Class<?> toConstruct, Class<TIn> parameterType) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(toConstruct, LOOKUP_ROOT);
return (Function<TIn, TOut>) LambdaMetafactory.metafactory(
lookup,
"apply",
MethodType.methodType(Function.class),
MethodType.methodType(Object.class, Object.class),
lookup.unreflectConstructor(toConstruct.getDeclaredConstructor(parameterType)),
MethodType.methodType(toConstruct, parameterType)
).getTarget().invoke();
public static <TIn, TOut> Function<TIn, TOut> constructor(Class<TOut> toConstruct, Class<TIn> parameterType) throws Throwable {
MethodHandles.Lookup lookup = LambdaFactory.lookup(toConstruct);
return LambdaFactory.function(lookup, lookup.unreflectConstructor(toConstruct.getDeclaredConstructor(parameterType)), toConstruct, parameterType);
}
public static <TIn, TOut> Function<TIn, TOut> constructor(String targetClassName, Class<TIn> parameterType) throws Throwable {
return constructor(Class.forName(targetClassName), parameterType);
return (Function<TIn, TOut>) constructor(Class.forName(targetClassName), parameterType);
}
// Constructor with two parameters
public static <TIn1, TIn2, TOut> BiFunction<TIn1, TIn2, TOut> constructor(Class<?> toConstruct, Class<TIn1> parameterType1, Class<TIn2> parameterType2) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(toConstruct, LOOKUP_ROOT);
return (BiFunction<TIn1, TIn2, TOut>) LambdaMetafactory.metafactory(
lookup,
"apply",
MethodType.methodType(BiFunction.class),
MethodType.methodType(Object.class, Object.class, Object.class),
lookup.unreflectConstructor(toConstruct.getDeclaredConstructor(parameterType1, parameterType2)),
MethodType.methodType(toConstruct, parameterType1, parameterType2)
).getTarget().invoke();
public static <TIn1, TIn2, TOut> BiFunction<TIn1, TIn2, TOut> constructor(Class<TOut> toConstruct, Class<TIn1> parameterType1, Class<TIn2> parameterType2) throws Throwable {
MethodHandles.Lookup lookup = LambdaFactory.lookup(toConstruct);
return LambdaFactory.function(lookup, lookup.unreflectConstructor(toConstruct.getDeclaredConstructor(parameterType1, parameterType2)), toConstruct, parameterType1, parameterType2);
}
public static <TIn1, TIn2, TOut> BiFunction<TIn1, TIn2, TOut> constructor(String targetClassName, Class<TIn1> parameterType1, Class<TIn2> parameterType2) throws Throwable {
return constructor(Class.forName(targetClassName), parameterType1, parameterType2);
return constructor((Class<TOut>) Class.forName(targetClassName), parameterType1, parameterType2);
}
// Procedure without parameters
public static Runnable staticProcedure(Class<?> targetClass, String name) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(targetClass, LOOKUP_ROOT);
return (Runnable) LambdaMetafactory.metafactory(
lookup,
"run",
MethodType.methodType(Runnable.class),
MethodType.methodType(Void.TYPE),
lookup.unreflect(targetClass.getDeclaredMethod(name)),
MethodType.methodType(Void.TYPE)
).getTarget().invoke();
MethodHandles.Lookup lookup = LambdaFactory.lookup(targetClass);
return LambdaFactory.runnable(lookup, lookup.unreflect(targetClass.getDeclaredMethod(name)));
}
public static Runnable staticProcedure(String targetClassName, String name) throws Throwable {
@ -114,15 +84,8 @@ public class Reflect {
// Procedure with one parameter
public static <TIn> Consumer<TIn> staticProcedure(Class<?> targetClass, String name, Class<TIn> parameterType) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(targetClass, LOOKUP_ROOT);
return (Consumer<TIn>) LambdaMetafactory.metafactory(
lookup,
"accept",
MethodType.methodType(Consumer.class),
MethodType.methodType(Void.TYPE, Object.class),
lookup.unreflect(targetClass.getDeclaredMethod(name, parameterType)),
MethodType.methodType(Void.TYPE, parameterType)
).getTarget().invoke();
MethodHandles.Lookup lookup = LambdaFactory.lookup(targetClass);
return LambdaFactory.consumer(lookup, lookup.unreflect(targetClass.getDeclaredMethod(name, parameterType)), parameterType);
}
public static <TIn> Consumer<TIn> staticProcedure(String targetClassName, String name, Class<TIn> parameterType) throws Throwable {
@ -131,15 +94,8 @@ public class Reflect {
// Procedure with two parameters
public static <TIn1, TIn2> BiConsumer<TIn1, TIn2> staticProcedure(Class<?> targetClass, String name, Class<TIn1> parameterType1, Class<TIn2> parameterType2) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(targetClass, LOOKUP_ROOT);
return (BiConsumer<TIn1, TIn2>) LambdaMetafactory.metafactory(
lookup,
"accept",
MethodType.methodType(BiConsumer.class),
MethodType.methodType(Void.TYPE, Object.class, Object.class),
lookup.unreflect(targetClass.getDeclaredMethod(name, parameterType1, parameterType2)),
MethodType.methodType(Void.TYPE, parameterType1, parameterType2)
).getTarget().invoke();
MethodHandles.Lookup lookup = LambdaFactory.lookup(targetClass);
return LambdaFactory.consumer(lookup, lookup.unreflect(targetClass.getDeclaredMethod(name, parameterType1, parameterType2)), parameterType1, parameterType2);
}
public static <TIn1, TIn2> BiConsumer<TIn1, TIn2> staticProcedure(String targetClassName, String name, Class<TIn1> parameterType1, Class<TIn2> parameterType2) throws Throwable {
@ -148,15 +104,8 @@ public class Reflect {
// Function without parameters
public static <TOut> Supplier<TOut> staticFunction(Class<?> targetClass, String name, Class<TOut> returnType) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(targetClass, LOOKUP_ROOT);
return (Supplier<TOut>) LambdaMetafactory.metafactory(
lookup,
"get",
MethodType.methodType(Supplier.class),
MethodType.methodType(Object.class),
lookup.unreflect(targetClass.getDeclaredMethod(name)),
MethodType.methodType(returnType)
).getTarget().invoke();
MethodHandles.Lookup lookup = LambdaFactory.lookup(targetClass);
return LambdaFactory.supplier(lookup, lookup.unreflect(targetClass.getDeclaredMethod(name)), returnType);
}
public static <TOut> Supplier<TOut> staticFunction(String targetClassName, String name, Class<TOut> returnType) throws Throwable {
@ -165,15 +114,8 @@ public class Reflect {
// Function with one parameter
public static <TIn, TOut> Function<TIn, TOut> staticFunction(Class<?> targetClass, String name, Class<TOut> returnType, Class<TIn> parameterType) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(targetClass, LOOKUP_ROOT);
return (Function<TIn, TOut>) LambdaMetafactory.metafactory(
lookup,
"apply",
MethodType.methodType(Function.class),
MethodType.methodType(Object.class, Object.class),
lookup.unreflect(targetClass.getDeclaredMethod(name, parameterType)),
MethodType.methodType(returnType, parameterType)
).getTarget().invoke();
MethodHandles.Lookup lookup = LambdaFactory.lookup(targetClass);
return LambdaFactory.function(lookup, lookup.unreflect(targetClass.getDeclaredMethod(name, parameterType)), returnType, parameterType);
}
public static <TIn, TOut> Function<TIn, TOut> staticFunction(String targetClassName, String name, Class<TOut> returnType, Class<TIn> parameterType) throws Throwable {
@ -182,15 +124,8 @@ public class Reflect {
// Function with two parameters
public static <TIn1, TIn2, TOut> BiFunction<TIn1, TIn2, TOut> staticFunction(Class<?> targetClass, String name, Class<TOut> returnType, Class<TIn1> parameterType1, Class<TIn2> parameterType2) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(targetClass, LOOKUP_ROOT);
return (BiFunction<TIn1, TIn2, TOut>) LambdaMetafactory.metafactory(
lookup,
"apply",
MethodType.methodType(BiFunction.class),
MethodType.methodType(Object.class, Object.class, Object.class),
lookup.unreflect(targetClass.getDeclaredMethod(name, parameterType1, parameterType2)),
MethodType.methodType(returnType, parameterType1, parameterType2)
).getTarget().invoke();
MethodHandles.Lookup lookup = LambdaFactory.lookup(targetClass);
return LambdaFactory.function(lookup, lookup.unreflect(targetClass.getDeclaredMethod(name, parameterType1, parameterType2)), returnType, parameterType1, parameterType2);
}
public static <TIn1, TIn2, TOut> BiFunction<TIn1, TIn2, TOut> staticFunction(String targetClassName, String name, Class<TOut> returnType, Class<TIn1> parameterType1, Class<TIn2> parameterType2) throws Throwable {
@ -199,15 +134,8 @@ public class Reflect {
// Procedure without parameters
public static <TTarget> Consumer<TTarget> instanceProcedure(Class<TTarget> targetClass, String name) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(targetClass, LOOKUP_ROOT);
return (Consumer<TTarget>) LambdaMetafactory.metafactory(
lookup,
"accept",
MethodType.methodType(Consumer.class),
MethodType.methodType(Void.TYPE, Object.class),
lookup.unreflect(targetClass.getDeclaredMethod(name)),
MethodType.methodType(Void.TYPE, targetClass)
).getTarget().invoke();
MethodHandles.Lookup lookup = LambdaFactory.lookup(targetClass);
return LambdaFactory.consumer(lookup, lookup.unreflect(targetClass.getDeclaredMethod(name)), targetClass);
}
public static <TTarget> Consumer<TTarget> instanceProcedure(String targetClassName, String name) throws Throwable {
@ -216,15 +144,8 @@ public class Reflect {
// Procedure with one parameter
public static <TTarget, TIn> BiConsumer<TTarget, TIn> instanceProcedure(Class<TTarget> targetClass, String name, Class<TIn> parameterType) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(targetClass, LOOKUP_ROOT);
return (BiConsumer<TTarget, TIn>) LambdaMetafactory.metafactory(
lookup,
"accept",
MethodType.methodType(BiConsumer.class),
MethodType.methodType(Void.TYPE, Object.class, Object.class),
lookup.unreflect(targetClass.getDeclaredMethod(name, parameterType)),
MethodType.methodType(Void.TYPE, targetClass, parameterType)
).getTarget().invoke();
MethodHandles.Lookup lookup = LambdaFactory.lookup(targetClass);
return LambdaFactory.consumer(lookup, lookup.unreflect(targetClass.getDeclaredMethod(name, parameterType)), targetClass, parameterType);
}
public static <TTarget, TIn> BiConsumer<TTarget, TIn> instanceProcedure(String targetClassName, String name, Class<TIn> parameterType) throws Throwable {
@ -233,15 +154,8 @@ public class Reflect {
// Function without parameters
public static <TTarget, TOut> Function<TTarget, TOut> instanceFunction(Class<TTarget> targetClass, String name, Class<TOut> returnType) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(targetClass, LOOKUP_ROOT);
return (Function<TTarget, TOut>) LambdaMetafactory.metafactory(
lookup,
"apply",
MethodType.methodType(Function.class),
MethodType.methodType(Object.class, Object.class),
lookup.unreflect(targetClass.getDeclaredMethod(name)),
MethodType.methodType(returnType, targetClass)
).getTarget().invoke();
MethodHandles.Lookup lookup = LambdaFactory.lookup(targetClass);
return LambdaFactory.function(lookup, lookup.unreflect(targetClass.getDeclaredMethod(name)), returnType, targetClass);
}
public static <TTarget, TOut> Function<TTarget, TOut> instanceFunction(String targetClassName, String name, Class<TOut> returnType) throws Throwable {
@ -250,15 +164,8 @@ public class Reflect {
// Function with one parameter
public static <TTarget, TIn, TOut> BiFunction<TTarget, TIn, TOut> instanceFunction(Class<TTarget> targetClass, String name, Class<TOut> returnType, Class<TIn> parameterType) throws Throwable {
MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(targetClass, LOOKUP_ROOT);
return (BiFunction<TTarget, TIn, TOut>) LambdaMetafactory.metafactory(
lookup,
"apply",
MethodType.methodType(BiFunction.class),
MethodType.methodType(Object.class, Object.class, Object.class),
lookup.unreflect(targetClass.getDeclaredMethod(name, parameterType)),
MethodType.methodType(returnType, targetClass, parameterType)
).getTarget().invoke();
MethodHandles.Lookup lookup = LambdaFactory.lookup(targetClass);
return LambdaFactory.function(lookup, lookup.unreflect(targetClass.getDeclaredMethod(name, parameterType)), returnType, targetClass, parameterType);
}
public static <TTarget, TIn, TOut> BiFunction<TTarget, TIn, TOut> instanceFunction(String targetClassName, String name, Class<TOut> returnType, Class<TIn> parameterType) throws Throwable {