private readonly String LambdaClassName; // Generated name for the generated class "X$$Lambda$1"
/// <summary>
/// General meta-factory constructor, supporting both standard cases and
/// allowing for uncommon options such as serialization or bridging.
/// </summary>
/// <param name="caller"> Stacked automatically by VM; represents a lookup context
/// with the accessibility privileges of the caller. </param>
/// <param name="invokedType"> Stacked automatically by VM; the signature of the
/// invoked method, which includes the expected static
/// type of the returned lambda object, and the static
/// types of the captured arguments for the lambda. In
/// the event that the implementation method is an
/// instance method, the first argument in the invocation
/// signature will correspond to the receiver. </param>
/// <param name="samMethodName"> Name of the method in the functional interface to
/// which the lambda or method reference is being
/// converted, represented as a String. </param>
/// <param name="samMethodType"> Type of the method in the functional interface to
/// which the lambda or method reference is being
/// converted, represented as a MethodType. </param>
/// <param name="implMethod"> The implementation method which should be called (with
/// suitable adaptation of argument types, return types,
/// and adjustment for captured arguments) when methods of
/// the resulting functional interface instance are invoked. </param>
/// <param name="instantiatedMethodType"> The signature of the primary functional
/// interface method after type variables are
/// substituted with their instantiation from
/// the capture site </param>
/// <param name="isSerializable"> Should the lambda be made serializable? If set,
/// either the target type or one of the additional SAM
/// types must extend {@code Serializable}. </param>
/// <param name="markerInterfaces"> Additional interfaces which the lambda object
/// should implement. </param>
/// <param name="additionalBridges"> Method types for additional signatures to be
/// bridged to the implementation method </param>
/// <exception cref="LambdaConversionException"> If any of the meta-factory protocol
/// invariants are violated </exception>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public InnerClassLambdaMetafactory(MethodHandles.Lookup caller, MethodType invokedType, String samMethodName, MethodType samMethodType, MethodHandle implMethod, MethodType instantiatedMethodType, boolean isSerializable, Class[] markerInterfaces, MethodType[] additionalBridges) throws LambdaConversionException
public InnerClassLambdaMetafactory(MethodHandles.Lookup caller, MethodType invokedType, String samMethodName, MethodType samMethodType, MethodHandle implMethod, MethodType instantiatedMethodType, bool isSerializable, Class[] markerInterfaces, MethodType[] additionalBridges) : base(caller, invokedType, samMethodName, samMethodType, implMethod, instantiatedMethodType, isSerializable, markerInterfaces, additionalBridges)
{
ImplMethodClassName = ImplDefiningClass.Name.Replace('.', '/');
ImplMethodName = ImplInfo.Name;
ImplMethodDesc = ImplMethodType.ToMethodDescriptorString();
ImplMethodReturnClass = (ImplKind == MethodHandleInfo.REF_newInvokeSpecial) ? ImplDefiningClass : ImplMethodType.ReturnType();
ConstructorType = invokedType.ChangeReturnType(Void.TYPE);
LambdaClassName = TargetClass.Name.Replace('.', '/') + "$$Lambda$" + Counter.IncrementAndGet();
Cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
int parameterCount = invokedType.ParameterCount();
if (parameterCount > 0)
{
ArgNames = new String[parameterCount];
ArgDescs = new String[parameterCount];
for (int i = 0; i < parameterCount; i++)
{
ArgNames[i] = "arg$" + (i + 1);
ArgDescs[i] = BytecodeDescriptor.unparse(invokedType.ParameterType(i));
}
}
else
{
ArgNames = ArgDescs = EMPTY_STRING_ARRAY;
}
}
internal virtual LambdaForm CollectArgumentsForm(int pos, MethodType collectorType)
{
int collectorArity = collectorType.ParameterCount();
bool dropResult = (collectorType.ReturnType() == typeof(void));
if (collectorArity == 1 && !dropResult)
{
return(FilterArgumentForm(pos, basicType(collectorType.ParameterType(0))));
}
BasicType[] newTypes = BasicType.basicTypes(collectorType.ParameterList());
Transform.Kind kind = (dropResult ? Transform.Kind.COLLECT_ARGS_TO_VOID : Transform.Kind.COLLECT_ARGS);
if (dropResult && collectorArity == 0) // pure side effect
{
pos = 1;
}
Transform key = Transform.Of(kind, pos, collectorArity, BasicType.basicTypesOrd(newTypes));
LambdaForm form = GetInCache(key);
if (form != null)
{
assert(form.Arity_Renamed == LambdaForm.Arity_Renamed - (dropResult ? 0 : 1) + collectorArity);
return(form);
}
form = MakeArgumentCombinationForm(pos, collectorType, false, dropResult);
return(PutInCache(key, form));
}
/// <summary>
/// Create a LF which simply reinvokes a target of the given basic type. </summary>
internal static LambdaForm MakeReinvokerForm(MethodHandle target, int whichCache, Object constraint, String debugString, bool forceInline, NamedFunction getTargetFn, NamedFunction preActionFn)
{
MethodType mtype = target.Type().BasicType();
bool customized = (whichCache <0 || mtype.ParameterSlotCount()> MethodType.MAX_MH_INVOKER_ARITY);
bool hasPreAction = (preActionFn != null);
LambdaForm form;
if (!customized)
{
form = mtype.Form().CachedLambdaForm(whichCache);
if (form != null)
{
return(form);
}
}
const int THIS_DMH = 0;
const int ARG_BASE = 1;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int ARG_LIMIT = ARG_BASE + mtype.parameterCount();
int ARG_LIMIT = ARG_BASE + mtype.ParameterCount();
int nameCursor = ARG_LIMIT;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int PRE_ACTION = hasPreAction ? nameCursor++ : -1;
int PRE_ACTION = hasPreAction ? nameCursor++: -1;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int NEXT_MH = customized ? -1 : nameCursor++;
int NEXT_MH = customized ? -1 : nameCursor++;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int REINVOKE = nameCursor++;
int REINVOKE = nameCursor++;
LambdaForm.Name[] names = LambdaForm.Arguments(nameCursor - ARG_LIMIT, mtype.InvokerType());
assert(names.Length == nameCursor);
names[THIS_DMH] = names[THIS_DMH].WithConstraint(constraint);
Object[] targetArgs;
if (hasPreAction)
{
names[PRE_ACTION] = new LambdaForm.Name(preActionFn, names[THIS_DMH]);
}
if (customized)
{
targetArgs = Arrays.CopyOfRange(names, ARG_BASE, ARG_LIMIT, typeof(Object[]));
names[REINVOKE] = new LambdaForm.Name(target, targetArgs); // the invoker is the target itself
}
else
{
names[NEXT_MH] = new LambdaForm.Name(getTargetFn, names[THIS_DMH]);
targetArgs = Arrays.CopyOfRange(names, THIS_DMH, ARG_LIMIT, typeof(Object[]));
targetArgs[0] = names[NEXT_MH]; // overwrite this MH with next MH
names[REINVOKE] = new LambdaForm.Name(mtype, targetArgs);
}
form = new LambdaForm(debugString, ARG_LIMIT, names, forceInline);
if (!customized)
{
form = mtype.Form().SetCachedLambdaForm(whichCache, form);
}
return(form);
}
private static MethodHandle BindCaller(MethodHandle target, Class hostClass)
{
MethodHandle cbmh = MethodHandleImpl.BindCaller(target, hostClass);
if (target.VarargsCollector)
{
MethodType type = cbmh.Type();
int arity = type.ParameterCount();
return(cbmh.AsVarargsCollector(type.ParameterType(arity - 1)));
}
return(cbmh);
}
internal virtual LambdaForm FoldArgumentsForm(int foldPos, bool dropResult, MethodType combinerType)
{
int combinerArity = combinerType.ParameterCount();
Transform.Kind kind = (dropResult ? Transform.Kind.FOLD_ARGS_TO_VOID : Transform.Kind.FOLD_ARGS);
Transform key = Transform.Of(kind, foldPos, combinerArity);
LambdaForm form = GetInCache(key);
if (form != null)
{
assert(form.Arity_Renamed == LambdaForm.Arity_Renamed - (kind == Transform.Kind.FOLD_ARGS ? 1 : 0));
return(form);
}
form = MakeArgumentCombinationForm(foldPos, combinerType, true, dropResult);
return(PutInCache(key, form));
}
private static LambdaForm MakePreparedLambdaForm(MethodType mtype, int which)
{
bool needsInit = (which == LF_INVSTATIC_INIT);
bool doesAlloc = (which == LF_NEWINVSPECIAL);
String linkerName, lambdaName;
switch (which)
{
case LF_INVVIRTUAL:
linkerName = "linkToVirtual";
lambdaName = "DMH.invokeVirtual";
break;
case LF_INVSTATIC:
linkerName = "linkToStatic";
lambdaName = "DMH.invokeStatic";
break;
case LF_INVSTATIC_INIT:
linkerName = "linkToStatic";
lambdaName = "DMH.invokeStaticInit";
break;
case LF_INVSPECIAL:
linkerName = "linkToSpecial";
lambdaName = "DMH.invokeSpecial";
break;
case LF_INVINTERFACE:
linkerName = "linkToInterface";
lambdaName = "DMH.invokeInterface";
break;
case LF_NEWINVSPECIAL:
linkerName = "linkToSpecial";
lambdaName = "DMH.newInvokeSpecial";
break;
default:
throw new InternalError("which=" + which);
}
MethodType mtypeWithArg = mtype.AppendParameterTypes(typeof(MemberName));
if (doesAlloc)
{
mtypeWithArg = mtypeWithArg.InsertParameterTypes(0, typeof(Object)).ChangeReturnType(typeof(void)); // <init> returns void - insert newly allocated obj
}
MemberName linker = new MemberName(typeof(MethodHandle), linkerName, mtypeWithArg, REF_invokeStatic);
try
{
linker = IMPL_NAMES.ResolveOrFail(REF_invokeStatic, linker, null, typeof(NoSuchMethodException));
}
catch (ReflectiveOperationException ex)
{
throw newInternalError(ex);
}
const int DMH_THIS = 0;
const int ARG_BASE = 1;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int ARG_LIMIT = ARG_BASE + mtype.parameterCount();
int ARG_LIMIT = ARG_BASE + mtype.ParameterCount();
int nameCursor = ARG_LIMIT;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int NEW_OBJ = (doesAlloc ? nameCursor++ : -1);
int NEW_OBJ = (doesAlloc ? nameCursor++: -1);
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int GET_MEMBER = nameCursor++;
int GET_MEMBER = nameCursor++;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int LINKER_CALL = nameCursor++;
int LINKER_CALL = nameCursor++;
Name[] names = arguments(nameCursor - ARG_LIMIT, mtype.InvokerType());
assert(names.Length == nameCursor);
if (doesAlloc)
{
// names = { argx,y,z,... new C, init method }
names[NEW_OBJ] = new Name(Lazy.NF_allocateInstance, names[DMH_THIS]);
names[GET_MEMBER] = new Name(Lazy.NF_constructorMethod, names[DMH_THIS]);
}
else if (needsInit)
{
names[GET_MEMBER] = new Name(Lazy.NF_internalMemberNameEnsureInit, names[DMH_THIS]);
}
else
{
names[GET_MEMBER] = new Name(Lazy.NF_internalMemberName, names[DMH_THIS]);
}
assert(FindDirectMethodHandle(names[GET_MEMBER]) == names[DMH_THIS]);
Object[] outArgs = Arrays.CopyOfRange(names, ARG_BASE, GET_MEMBER + 1, typeof(Object[]));
assert(outArgs[outArgs.Length - 1] == names[GET_MEMBER]); // look, shifted args!
int result = LAST_RESULT;
if (doesAlloc)
{
assert(outArgs[outArgs.Length - 2] == names[NEW_OBJ]); // got to move this one
System.Array.Copy(outArgs, 0, outArgs, 1, outArgs.Length - 2);
outArgs[0] = names[NEW_OBJ];
result = NEW_OBJ;
}
names[LINKER_CALL] = new Name(linker, outArgs);
lambdaName += "_" + shortenSignature(basicTypeSignature(mtype));
LambdaForm lform = new LambdaForm(lambdaName, ARG_LIMIT, names, result);
// This is a tricky bit of code. Don't send it through the LF interpreter.
lform.CompileToBytecode();
return(lform);
}
private LambdaForm MakeArgumentCombinationForm(int pos, MethodType combinerType, bool keepArguments, bool dropResult)
{
LambdaFormBuffer buf = Buffer();
buf.StartEdit();
int combinerArity = combinerType.ParameterCount();
int resultArity = (dropResult ? 0 : 1);
assert(pos <= MethodType.MAX_JVM_ARITY);
assert(pos + resultArity + (keepArguments ? combinerArity : 0) <= LambdaForm.Arity_Renamed);
assert(pos > 0); // cannot filter the MH arg itself
assert(combinerType == combinerType.BasicType());
assert(combinerType.ReturnType() != typeof(void) || dropResult);
BoundMethodHandle.SpeciesData oldData = OldSpeciesData();
BoundMethodHandle.SpeciesData newData = NewSpeciesData(L_TYPE);
// The newly created LF will run with a different BMH.
// Switch over any pre-existing BMH field references to the new BMH class.
Name oldBaseAddress = LambdaForm.Parameter(0); // BMH holding the values
buf.ReplaceFunctions(oldData.GetterFunctions(), newData.GetterFunctions(), oldBaseAddress);
Name newBaseAddress = oldBaseAddress.withConstraint(newData);
buf.RenameParameter(0, newBaseAddress);
Name getCombiner = new Name(newData.GetterFunction(oldData.FieldCount()), newBaseAddress);
Object[] combinerArgs = new Object[1 + combinerArity];
combinerArgs[0] = getCombiner;
Name[] newParams;
if (keepArguments)
{
newParams = new Name[0];
System.Array.Copy(LambdaForm.Names, pos + resultArity, combinerArgs, 1, combinerArity);
}
else
{
newParams = new Name[combinerArity];
BasicType[] newTypes = basicTypes(combinerType.ParameterList());
for (int i = 0; i < newTypes.Length; i++)
{
newParams[i] = new Name(pos + i, newTypes[i]);
}
System.Array.Copy(newParams, 0, combinerArgs, 1, combinerArity);
}
Name callCombiner = new Name(combinerType, combinerArgs);
// insert the two new expressions
int exprPos = LambdaForm.Arity();
buf.InsertExpression(exprPos + 0, getCombiner);
buf.InsertExpression(exprPos + 1, callCombiner);
// insert new arguments, if needed
int argPos = pos + resultArity; // skip result parameter
foreach (Name newParam in newParams)
{
buf.InsertParameter(argPos++, newParam);
}
assert(buf.LastIndexOf(callCombiner) == exprPos + 1 + newParams.Length);
if (!dropResult)
{
buf.ReplaceParameterByCopy(pos, exprPos + 1 + newParams.Length);
}
return(buf.EndEdit());
}
internal virtual LambdaForm CollectArgumentArrayForm(int pos, MethodHandle arrayCollector)
{
MethodType collectorType = arrayCollector.Type();
int collectorArity = collectorType.ParameterCount();
assert(arrayCollector.IntrinsicName() == Intrinsic.NEW_ARRAY);
Class arrayType = collectorType.ReturnType();
Class elementType = arrayType.ComponentType;
BasicType argType = basicType(elementType);
int argTypeKey = argType.ordinal();
if (argType.basicTypeClass() != elementType)
{
// return null if it requires more metadata (like String[].class)
if (!elementType.Primitive)
{
return(null);
}
argTypeKey = TYPE_LIMIT + Wrapper.forPrimitiveType(elementType).ordinal();
}
assert(collectorType.ParameterList().Equals(Collections.NCopies(collectorArity, elementType)));
Transform.Kind kind = Transform.Kind.COLLECT_ARGS_TO_ARRAY;
Transform key = Transform.Of(kind, pos, collectorArity, argTypeKey);
LambdaForm form = GetInCache(key);
if (form != null)
{
assert(form.Arity_Renamed == LambdaForm.Arity_Renamed - 1 + collectorArity);
return(form);
}
LambdaFormBuffer buf = Buffer();
buf.StartEdit();
assert(pos + 1 <= LambdaForm.Arity_Renamed);
assert(pos > 0); // cannot filter the MH arg itself
Name[] newParams = new Name[collectorArity];
for (int i = 0; i < collectorArity; i++)
{
newParams[i] = new Name(pos + i, argType);
}
Name callCombiner = new Name(arrayCollector, (Object[])newParams); //...
// insert the new expression
int exprPos = LambdaForm.Arity();
buf.InsertExpression(exprPos, callCombiner);
// insert new arguments
int argPos = pos + 1; // skip result parameter
foreach (Name newParam in newParams)
{
buf.InsertParameter(argPos++, newParam);
}
assert(buf.LastIndexOf(callCombiner) == exprPos + newParams.Length);
buf.ReplaceParameterByCopy(pos, exprPos + newParams.Length);
form = buf.EndEdit();
return(PutInCache(key, form));
}
/// <summary>
/// Produces an instance of the given single-method interface which redirects
/// its calls to the given method handle.
/// <para>
/// A single-method interface is an interface which declares a uniquely named method.
/// When determining the uniquely named method of a single-method interface,
/// the public {@code Object} methods ({@code toString}, {@code equals}, {@code hashCode})
/// are disregarded. For example, <seealso cref="java.util.Comparator"/> is a single-method interface,
/// even though it re-declares the {@code Object.equals} method.
/// </para>
/// <para>
/// The interface must be public. No additional access checks are performed.
/// </para>
/// <para>
/// The resulting instance of the required type will respond to
/// invocation of the type's uniquely named method by calling
/// the given target on the incoming arguments,
/// and returning or throwing whatever the target
/// returns or throws. The invocation will be as if by
/// {@code target.invoke}.
/// The target's type will be checked before the
/// instance is created, as if by a call to {@code asType},
/// which may result in a {@code WrongMethodTypeException}.
/// </para>
/// <para>
/// The uniquely named method is allowed to be multiply declared,
/// with distinct type descriptors. (E.g., it can be overloaded,
/// or can possess bridge methods.) All such declarations are
/// connected directly to the target method handle.
/// Argument and return types are adjusted by {@code asType}
/// for each individual declaration.
/// </para>
/// <para>
/// The wrapper instance will implement the requested interface
/// and its super-types, but no other single-method interfaces.
/// This means that the instance will not unexpectedly
/// pass an {@code instanceof} test for any unrequested type.
/// <p style="font-size:smaller;">
/// <em>Implementation Note:</em>
/// Therefore, each instance must implement a unique single-method interface.
/// Implementations may not bundle together
/// multiple single-method interfaces onto single implementation classes
/// in the style of <seealso cref="java.awt.AWTEventMulticaster"/>.
/// </para>
/// <para>
/// The method handle may throw an <em>undeclared exception</em>,
/// which means any checked exception (or other checked throwable)
/// not declared by the requested type's single abstract method.
/// If this happens, the throwable will be wrapped in an instance of
/// <seealso cref="java.lang.reflect.UndeclaredThrowableException UndeclaredThrowableException"/>
/// and thrown in that wrapped form.
/// </para>
/// <para>
/// Like <seealso cref="java.lang.Integer#valueOf Integer.valueOf"/>,
/// {@code asInterfaceInstance} is a factory method whose results are defined
/// by their behavior.
/// It is not guaranteed to return a new instance for every call.
/// </para>
/// <para>
/// Because of the possibility of <seealso cref="java.lang.reflect.Method#isBridge bridge methods"/>
/// and other corner cases, the interface may also have several abstract methods
/// with the same name but having distinct descriptors (types of returns and parameters).
/// In this case, all the methods are bound in common to the one given target.
/// The type check and effective {@code asType} conversion is applied to each
/// method type descriptor, and all abstract methods are bound to the target in common.
/// Beyond this type check, no further checks are made to determine that the
/// abstract methods are related in any way.
/// </para>
/// <para>
/// Future versions of this API may accept additional types,
/// such as abstract classes with single abstract methods.
/// Future versions of this API may also equip wrapper instances
/// with one or more additional public "marker" interfaces.
/// </para>
/// <para>
/// If a security manager is installed, this method is caller sensitive.
/// During any invocation of the target method handle via the returned wrapper,
/// the original creator of the wrapper (the caller) will be visible
/// to context checks requested by the security manager.
///
/// </para>
/// </summary>
/// @param <T> the desired type of the wrapper, a single-method interface </param>
/// <param name="intfc"> a class object representing {@code T} </param>
/// <param name="target"> the method handle to invoke from the wrapper </param>
/// <returns> a correctly-typed wrapper for the given target </returns>
/// <exception cref="NullPointerException"> if either argument is null </exception>
/// <exception cref="IllegalArgumentException"> if the {@code intfc} is not a
/// valid argument to this method </exception>
/// <exception cref="WrongMethodTypeException"> if the target cannot
/// be converted to the type required by the requested interface </exception>
// Other notes to implementors:
// <p>
// No stable mapping is promised between the single-method interface and
// the implementation class C. Over time, several implementation
// classes might be used for the same type.
// <p>
// If the implementation is able
// to prove that a wrapper of the required type
// has already been created for a given
// method handle, or for another method handle with the
// same behavior, the implementation may return that wrapper in place of
// a new wrapper.
// <p>
// This method is designed to apply to common use cases
// where a single method handle must interoperate with
// an interface that implements a function-like
// API. Additional variations, such as single-abstract-method classes with
// private constructors, or interfaces with multiple but related
// entry points, must be covered by hand-written or automatically
// generated adapter classes.
//
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @CallerSensitive public static <T> T asInterfaceInstance(final Class intfc, final MethodHandle target)
//JAVA TO C# CONVERTER WARNING: 'final' parameters are not allowed in .NET:
public static T asInterfaceInstance <T>(Class intfc, MethodHandle target)
{
if (!intfc.Interface || !Modifier.IsPublic(intfc.Modifiers))
{
throw newIllegalArgumentException("not a public interface", intfc.Name);
}
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final MethodHandle mh;
MethodHandle mh;
if (System.SecurityManager != null)
{
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final Class caller = sun.reflect.Reflection.getCallerClass();
Class caller = Reflection.CallerClass;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final ClassLoader ccl = caller != null ? caller.getClassLoader() : null;
ClassLoader ccl = caller != null ? caller.ClassLoader : null;
ReflectUtil.checkProxyPackageAccess(ccl, intfc);
mh = ccl != null?BindCaller(target, caller) : target;
}
else
{
mh = target;
}
ClassLoader proxyLoader = intfc.ClassLoader;
if (proxyLoader == null)
{
ClassLoader cl = Thread.CurrentThread.ContextClassLoader; // avoid use of BCP
proxyLoader = cl != null ? cl : ClassLoader.SystemClassLoader;
}
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final Method[] methods = getSingleNameMethods(intfc);
Method[] methods = GetSingleNameMethods(intfc);
if (methods == null)
{
throw newIllegalArgumentException("not a single-method interface", intfc.Name);
}
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final MethodHandle[] vaTargets = new MethodHandle[methods.length];
MethodHandle[] vaTargets = new MethodHandle[methods.Length];
for (int i = 0; i < methods.Length; i++)
{
Method sm = methods[i];
MethodType smMT = MethodType.MethodType(sm.ReturnType, sm.ParameterTypes);
MethodHandle checkTarget = mh.AsType(smMT); // make throw WMT
checkTarget = checkTarget.AsType(checkTarget.Type().ChangeReturnType(typeof(Object)));
vaTargets[i] = checkTarget.AsSpreader(typeof(Object[]), smMT.ParameterCount());
}
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final InvocationHandler ih = new InvocationHandler()
InvocationHandler ih = new InvocationHandlerAnonymousInnerClassHelper(intfc, target, methods, vaTargets);
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final Object proxy;
Object proxy;
if (System.SecurityManager != null)
{
// sun.invoke.WrapperInstance is a restricted interface not accessible
// by any non-null class loader.
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final ClassLoader loader = proxyLoader;
ClassLoader loader = proxyLoader;
proxy = AccessController.doPrivileged(new PrivilegedActionAnonymousInnerClassHelper(intfc, ih, loader));
}
else
{
proxy = Proxy.NewProxyInstance(proxyLoader, new Class[] { intfc, typeof(WrapperInstance) }, ih);
}
return(intfc.Cast(proxy));
}
/// <summary>
/// Check the meta-factory arguments for errors </summary>
/// <exception cref="LambdaConversionException"> if there are improper conversions </exception>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: void validateMetafactoryArgs() throws LambdaConversionException
internal virtual void ValidateMetafactoryArgs()
{
switch (ImplKind)
{
case MethodHandleInfo.REF_invokeInterface:
case MethodHandleInfo.REF_invokeVirtual:
case MethodHandleInfo.REF_invokeStatic:
case MethodHandleInfo.REF_newInvokeSpecial:
case MethodHandleInfo.REF_invokeSpecial:
break;
default:
throw new LambdaConversionException(string.Format("Unsupported MethodHandle kind: {0}", ImplInfo));
}
// Check arity: optional-receiver + captured + SAM == impl
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int implArity = implMethodType.parameterCount();
int implArity = ImplMethodType.ParameterCount();
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int receiverArity = implIsInstanceMethod ? 1 : 0;
int receiverArity = ImplIsInstanceMethod ? 1 : 0;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int capturedArity = invokedType.parameterCount();
int capturedArity = InvokedType.ParameterCount();
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int samArity = samMethodType.parameterCount();
int samArity = SamMethodType.ParameterCount();
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int instantiatedArity = instantiatedMethodType.parameterCount();
int instantiatedArity = InstantiatedMethodType.ParameterCount();
if (implArity + receiverArity != capturedArity + samArity)
{
throw new LambdaConversionException(string.Format("Incorrect number of parameters for {0} method {1}; {2:D} captured parameters, {3:D} functional interface method parameters, {4:D} implementation parameters", ImplIsInstanceMethod ? "instance" : "static", ImplInfo, capturedArity, samArity, implArity));
}
if (instantiatedArity != samArity)
{
throw new LambdaConversionException(string.Format("Incorrect number of parameters for {0} method {1}; {2:D} instantiated parameters, {3:D} functional interface method parameters", ImplIsInstanceMethod ? "instance" : "static", ImplInfo, instantiatedArity, samArity));
}
foreach (MethodType bridgeMT in AdditionalBridges)
{
if (bridgeMT.ParameterCount() != samArity)
{
throw new LambdaConversionException(string.Format("Incorrect number of parameters for bridge signature {0}; incompatible with {1}", bridgeMT, SamMethodType));
}
}
// If instance: first captured arg (receiver) must be subtype of class where impl method is defined
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int capturedStart;
int capturedStart;
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int samStart;
int samStart;
if (ImplIsInstanceMethod)
{
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final Class receiverClass;
Class receiverClass;
// implementation is an instance method, adjust for receiver in captured variables / SAM arguments
if (capturedArity == 0)
{
// receiver is function parameter
capturedStart = 0;
samStart = 1;
receiverClass = InstantiatedMethodType.ParameterType(0);
}
else
{
// receiver is a captured variable
capturedStart = 1;
samStart = 0;
receiverClass = InvokedType.ParameterType(0);
}
// check receiver type
if (!receiverClass.IsSubclassOf(ImplDefiningClass))
{
throw new LambdaConversionException(string.Format("Invalid receiver type {0}; not a subtype of implementation type {1}", receiverClass, ImplDefiningClass));
}
Class implReceiverClass = ImplMethod.Type().ParameterType(0);
if (implReceiverClass != ImplDefiningClass && !receiverClass.IsSubclassOf(implReceiverClass))
{
throw new LambdaConversionException(string.Format("Invalid receiver type {0}; not a subtype of implementation receiver type {1}", receiverClass, implReceiverClass));
}
}
else
{
// no receiver
capturedStart = 0;
samStart = 0;
}
// Check for exact match on non-receiver captured arguments
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int implFromCaptured = capturedArity - capturedStart;
int implFromCaptured = capturedArity - capturedStart;
for (int i = 0; i < implFromCaptured; i++)
{
Class implParamType = ImplMethodType.ParameterType(i);
Class capturedParamType = InvokedType.ParameterType(i + capturedStart);
if (!capturedParamType.Equals(implParamType))
{
throw new LambdaConversionException(string.Format("Type mismatch in captured lambda parameter {0:D}: expecting {1}, found {2}", i, capturedParamType, implParamType));
}
}
// Check for adaptation match on SAM arguments
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int samOffset = samStart - implFromCaptured;
int samOffset = samStart - implFromCaptured;
for (int i = implFromCaptured; i < implArity; i++)
{
Class implParamType = ImplMethodType.ParameterType(i);
Class instantiatedParamType = InstantiatedMethodType.ParameterType(i + samOffset);
if (!IsAdaptableTo(instantiatedParamType, implParamType, true))
{
throw new LambdaConversionException(string.Format("Type mismatch for lambda argument {0:D}: {1} is not convertible to {2}", i, instantiatedParamType, implParamType));
}
}
// Adaptation match: return type
Class expectedType = InstantiatedMethodType.ReturnType();
Class actualReturnType = (ImplKind == MethodHandleInfo.REF_newInvokeSpecial) ? ImplDefiningClass : ImplMethodType.ReturnType();
Class samReturnType = SamMethodType.ReturnType();
if (!IsAdaptableToAsReturn(actualReturnType, expectedType))
{
throw new LambdaConversionException(string.Format("Type mismatch for lambda return: {0} is not convertible to {1}", actualReturnType, expectedType));
}
if (!IsAdaptableToAsReturnStrict(expectedType, samReturnType))
{
throw new LambdaConversionException(string.Format("Type mismatch for lambda expected return: {0} is not convertible to {1}", expectedType, samReturnType));
}
foreach (MethodType bridgeMT in AdditionalBridges)
{
if (!IsAdaptableToAsReturnStrict(expectedType, bridgeMT.ReturnType()))
{
throw new LambdaConversionException(string.Format("Type mismatch for lambda expected return: {0} is not convertible to {1}", expectedType, bridgeMT.ReturnType()));
}
}
}
