@NotNull
public static SimpleFunctionDescriptor createSamAdapterFunction(
@NotNull SimpleFunctionDescriptor original) {
SimpleFunctionDescriptorImpl result =
new SimpleFunctionDescriptorImpl(
original.getContainingDeclaration(),
original.getAnnotations(),
original.getName(),
CallableMemberDescriptor.Kind.SYNTHESIZED);
TypeParameters typeParameters =
recreateAndInitializeTypeParameters(original.getTypeParameters(), result);
JetType returnTypeUnsubstituted = original.getReturnType();
assert returnTypeUnsubstituted != null : original;
JetType returnType =
typeParameters.substitutor.substitute(returnTypeUnsubstituted, Variance.OUT_VARIANCE);
assert returnType != null
: "couldn't substitute type: "
+ returnType
+ ", substitutor = "
+ typeParameters.substitutor;
List<ValueParameterDescriptor> valueParameters = Lists.newArrayList();
for (ValueParameterDescriptor originalParam : original.getValueParameters()) {
JetType originalType = originalParam.getType();
JetType newTypeUnsubstituted =
isSamType(originalType) ? getFunctionTypeForSamType(originalType) : originalType;
JetType newType =
typeParameters.substitutor.substitute(newTypeUnsubstituted, Variance.IN_VARIANCE);
assert newType != null
: "couldn't substitute type: "
+ newTypeUnsubstituted
+ ", substitutor = "
+ typeParameters.substitutor;
ValueParameterDescriptor newParam =
new ValueParameterDescriptorImpl(
result,
originalParam.getIndex(),
originalParam.getAnnotations(),
originalParam.getName(),
newType,
false,
null);
valueParameters.add(newParam);
}
result.initialize(
null,
original.getExpectedThisObject(),
typeParameters.descriptors,
valueParameters,
returnType,
original.getModality(),
original.getVisibility(),
false);
return result;
}
public static boolean isSamAdapterNecessary(@NotNull SimpleFunctionDescriptor fun) {
for (ValueParameterDescriptor param : fun.getValueParameters()) {
if (isSamType(param.getType())) {
return true;
}
}
return false;
}