more cleanup

src/class.rs

@@ -1,6 +1,5 @@
 use std::cell::RefCell;
 use std::collections::{HashMap, LinkedList};
-use std::fmt;
 use std::fmt::Debug;
 use std::rc::Rc;
 
@@ -8,7 +7,6 @@ use log::debug;
 use rand::random;
 
 use crate::class::ObjectRef::*;
-use crate::classloader::classdef::CpEntry;
 
 /// ClassId facilitates loose coupling between classes, classdefs and objects
 pub type ClassId = usize;
@@ -42,6 +40,7 @@ pub struct Class {
 }
 
 impl Class {
+    /// gets the number of non-static fields on the class
     pub(crate) fn n_object_fields(&self) -> usize {
         self.object_field_mapping
             .iter()
@@ -103,7 +102,6 @@ pub enum ObjectRef {
     StringArray(Vec<String>),
     ObjectArray(ClassId, Vec<ObjectRef>),
     Object(Rc<RefCell<Object>>),
-    //Box necessary??
     Class(Class),
 }
 
@@ -178,13 +176,17 @@ fn into_vec_i8(v: Vec<u8>) -> Vec<i8> {
 
 #[derive(Debug)]
 pub struct Object {
+    /// unique id for instance
     pub id: u32,
+    /// loose ref to class
     pub class_id: ClassId,
+    /// instance field data
     pub data: Vec<Value>,
-} //arrays
+}
 
 // object, not array
 impl Object {
+
     pub fn new(class: &Class) -> Self {
         let instance_data = Object::init_fields(class);
         Self {

src/vm/native.rs

@@ -10,7 +10,7 @@ use once_cell::sync::Lazy;
 use crate::class::{ObjectRef, Value};
 use crate::class::ObjectRef::Object;
 use crate::class::Value::{I32, Void};
-use crate::classmanager;
+use crate::{class, classmanager};
 use crate::vm::stack::StackFrame;
 use crate::vm::Vm;
 
@@ -59,8 +59,7 @@ fn jdk_internal_util_SystemProps_Raw(vm: &mut Vm, stackframes: &mut Vec<StackFra
 fn cmdProps(vm: &mut Vm, stackframes: &mut Vec<StackFrame>) -> Result<Value, Error> {
     classmanager::load_class_by_name("java/util/HashMap");
     let hashmap_class = classmanager::get_class_by_name("java/util/HashMap").unwrap();
-    let hashmap = Vm::new_instance(hashmap_class);
+    let hashmap = Value::Ref(Object(Rc::new(RefCell::new(class::Object::new(hashmap_class))))); // this is convoluted
-    let hashmap = Value::Ref(Object(Rc::new(RefCell::new(hashmap))));
     vm.execute_special(stackframes, "java/util/HashMap", "<init>()V", vec![hashmap.clone()])?;
     Ok(hashmap)
 }

src/vm/operations.rs

@@ -6,9 +6,10 @@ use anyhow::Error;
 use log::debug;
 
 use crate::class::{Class, ObjectRef, Value};
+use crate::class::ObjectRef::Object;
 use crate::class::Value::{I32, Ref};
 use crate::classloader::classdef::{CpEntry, Method};
-use crate::classmanager;
+use crate::{class, classmanager};
 use crate::vm::stack::StackFrame;
 use crate::vm::Vm;
 use crate::vm::vm::{current_frame, Invocation, MethodSignature};
@@ -90,12 +91,12 @@ pub(crate) fn load_constant(cp_index: &u16, method: &Method, stackframes: &mut V
             let string: Vec<u8> = string.as_bytes().into();
             classmanager::load_class_by_name("java/lang/String");
             let stringclass = classmanager::get_class_by_name("java/lang/String").unwrap();
-            let mut stringinstance = Vm::new_instance(stringclass);
+            let mut stringinstance = class::Object::new(stringclass);
-            stringinstance.set(stringclass, "java/lang/String", "value", Value::Ref(ObjectRef::new_byte_array(string)));
+            stringinstance.set(stringclass, "java/lang/String", "value", Ref(ObjectRef::new_byte_array(string)));
 
             debug!("new string \"{}\"", utf8);
 
-            current_frame(stackframes).push(Ref(ObjectRef::Object(Rc::new(RefCell::new(stringinstance)))));
+            current_frame(stackframes).push(Ref(Object(Rc::new(RefCell::new(stringinstance)))));
         }
         CpEntry::Long(l) => {
             current_frame(stackframes).push(Value::I64(*l));

src/vm/vm.rs

@@ -55,10 +55,6 @@ impl Vm {
         vm.execute_static(stack, "java/lang/System", "initPhase1()V", vec![]).expect("cannot create VM");
     }
 
-    pub fn new_instance(class: &Class) -> Object {
-        Object::new(class)
-    }
-
     /// execute the bytecode
     pub fn execute_virtual(
         &mut self,
@@ -516,7 +512,7 @@ impl Vm {
                         classmanager::load_class_by_name(class_name);
                         let class_to_instantiate = classmanager::get_class_by_name(class_name).unwrap();
 
-                        let object = ObjectRef::Object(Rc::new(RefCell::new(Vm::new_instance(
+                        let object = ObjectRef::Object(Rc::new(RefCell::new(Object::new(
                             class_to_instantiate,
                         ))));
                         current_frame(stackframes).push(Ref(object));