private static int compareHandle(Handle h1, Handle h2) {
int d = h1.getTag() - h2.getTag();
if (d == 0) {
d = h1.getOwner().compareTo(h2.getOwner());
if (d == 0) {
d = h1.getName().compareTo(h2.getName());
if (d == 0) {
d = h1.getDesc().compareTo(h2.getDesc());
}
}
}
return d;
}
void addConstant(final Object constant) {
if (constant instanceof Type) {
addType((Type) constant);
} else if (constant instanceof Handle) {
Handle handle = (Handle) constant;
addInternalType(handle.getOwner());
addMethodTypes(handle.getDesc());
}
}
void addConstant(final Object cst) {
if (cst instanceof Type) {
addType((Type) cst);
} else if (cst instanceof Handle) {
Handle h = (Handle) cst;
addInternalName(h.getOwner());
addMethodDesc(h.getDesc());
}
}
@Override
public void visitLdcInsn(Object cst) {
if (cst instanceof Handle) {
Handle handle = (Handle) cst;
cst =
new Handle(
handle.getTag(),
handle.getOwner(),
handle.getName(),
getMethodDescriptor(handle.getDesc()));
}
super.visitLdcInsn(cst);
}
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);
}
}