private String getLambdaAccessMethodDesc(Handle implMethod) {
if (implMethod.getTag() == H_INVOKESTATIC) {
// static method call -> keep as-is
return implMethod.getDesc();
} else if (implMethod.getTag() == H_NEWINVOKESPECIAL) {
// constructor call -> change to a a factory method
return Types.changeReturnType(
Type.getObjectType(implMethod.getOwner()), implMethod.getDesc());
} else {
// instance method call -> change to a static method
return Types.prependArgumentType(Type.getObjectType(className), implMethod.getDesc());
}
}
Handle getLambdaAccessMethod(Handle implMethod) {
if (!implMethod.getOwner().equals(className)) {
return implMethod;
}
if (Flags.hasFlag(classAccess, ACC_INTERFACE)) {
// the method will be relocated to a companion class
return implMethod;
}
// TODO: do not generate an access method if the impl method is not private (probably not
// implementable with a single pass)
String name = "access$lambda$" + lambdaAccessToImplMethods.size();
String desc = getLambdaAccessMethodDesc(implMethod);
Handle accessMethod = new Handle(H_INVOKESTATIC, className, name, desc);
lambdaAccessToImplMethods.put(accessMethod, implMethod);
return accessMethod;
}
@Override
public void visitInvokeDynamicInsn(String name, String desc, Handle bsm, Object... bsmArgs) {
if (bsm.getOwner().equals(LambdaNaming.LAMBDA_METAFACTORY)) {
backportLambda(name, Type.getType(desc), bsm, bsmArgs);
} else {
super.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
}
}