//
// MakeGenericMethod
//
public override MethodInfo MakeGenericMethod(Type[] typeArguments)
{
if (!IsGenericMethodDefinition)
{
throw new InvalidOperationException();
}
if (typeArguments == null)
{
throw new ArgumentNullException();
}
var implicitTypeArgs = reflectedType.GetGenericArguments();
int implicitTypeArgsCount = implicitTypeArgs.Length;
var explicitTypeArgsCount = typeArguments.Length;
int combinedTypeArgsCount = implicitTypeArgsCount + explicitTypeArgsCount;
var combinedTypeArgs = new object[combinedTypeArgsCount];
java.lang.System.arraycopy(
/* from */ implicitTypeArgs, 0,
/* into */ combinedTypeArgs, 0,
/* count */ implicitTypeArgsCount);
java.lang.System.arraycopy(
/* from */ typeArguments, 0,
/* into */ combinedTypeArgs, implicitTypeArgsCount,
/* count */ explicitTypeArgsCount);
var newMethod = new RuntimeMethodInfo(JavaMethod, -1, reflectedType,
originalName, strippedName);
newMethod.typeArguments = combinedTypeArgs;
newMethod.genericFlags = flgGenericMethod;
for (int i = 0; i < combinedTypeArgsCount; i++)
{
var arg = combinedTypeArgs[i] as RuntimeType;
if (arg == null)
{
throw new ArgumentNullException();
}
if (arg.IsGenericParameter || arg.ContainsGenericParameters)
{
newMethod.genericFlags |= flgContainsGenericParameters;
}
}
return(newMethod);
}
//
// constructor
//
#pragma warning disable 0436
private RuntimeMethodInfo(java.lang.reflect.Method javaMethod, int modifiers,
system.RuntimeType reflectedType,
string originalName, string strippedName)
#pragma warning restore 0436
{
this.JavaMethod = javaMethod;
this.reflectedType = reflectedType;
this.originalName = originalName;
this.strippedName = strippedName;
if (modifiers == -1) // if called from MakeGenericMethod
{
return;
}
// analyze the method and the declaring type in order to decide what
// type of a generic method this is. the general idea is:
// if the method takes more generic parameters, than the number of
// arguments in the type, then it is a generic method definition.
int originalNameLen = originalName.Length;
char lastChar = (originalNameLen > 0)
? originalName[originalNameLen - 1]
: (char)0;
// the actual suffix character is configured in CilMain.cs
if (lastChar == '\u00A1' || lastChar == '!') // U+00A1 Inverted Exclamation Mark
{
if ((modifiers & java.lang.reflect.Modifier.STATIC) == 0)
{
// if an instance method takes any type arguments at all,
// then it must be a generic method definition
genericFlags |= flgGenericMethod
| flgGenericMethodDefinition
| flgContainsGenericParameters;
}
else
{
// count the number of type arguments in the declaring type
var typeArgsInType = reflectedType.GetGenericArguments();
int numTypeArgsInType = typeArgsInType.Length;
// count the number of type parameters in the method signature
int numTypeArgsInMethod = 0;
var paramTypes = javaMethod.getParameterTypes();
int paramIndex = paramTypes.Length;
while (paramIndex-- > 0)
{
var paramType = paramTypes[paramIndex];
if (paramType != (java.lang.Class) typeof(System.Type))
{
break;
}
numTypeArgsInMethod++;
}
if (numTypeArgsInMethod == numTypeArgsInType)
{
// a static method that takes a number of type parameters
// equal to the number of arguments in the declaring type.
// this means it is not a generic method, but it may not
// be invokable, if the declaring type is not concrete.
if (reflectedType.ContainsGenericParameters)
{
genericFlags |= flgContainsGenericParameters;
}
else if (reflectedType.IsGenericType)
{
genericFlags |= flgCombineGenericArguments;
}
}
else if (numTypeArgsInMethod > numTypeArgsInType)
{
// a static method that takes more parameters than the
// declaring type, i.e. it is a generic method definition.
genericFlags |= flgGenericMethod
| flgGenericMethodDefinition
| flgContainsGenericParameters;
}
else
{
throw new TypeLoadException(originalName);
}
}
}
else
{
// a method that does not take any type argument may still be
// not invokable, if the reflected type is not a concrete type.
// note that this is true only for instance methods, as static
// methods in a generic type will always take type arguments.
if ((modifiers & java.lang.reflect.Modifier.STATIC) == 0)
{
if (reflectedType.ContainsGenericParameters)
{
genericFlags |= flgContainsGenericParameters;
}
else if (reflectedType.IsGenericType)
{
genericFlags |= flgCombineGenericArguments;
}
}
}
}
