def j_string(loader: ClassLoader, python_str):
"""
根据python字符串返回相应的Java字符串实例
:param loader:
:param python_str:
:return:
"""
# 如果Java字符串已经在池中，直接返回
interned_str = interned_strings.get(python_str)
if interned_str:
return interned_str
# 把python字符串（utf-8格式）转成Java字符数组（utf-16格式）
chars = string_to_utf16(python_str)
# 创建一个Java字符串实例
j_chars = Object(loader.load_class("[C"), chars)
# 把字符串实例的value变量设置成刚刚转换过来的字符数组
j_str = loader.load_class("java/lang/String").new_object()
j_str.set_ref_var("value", "[C", j_chars)
# 把Java字符串放入池中
interned_strings[python_str] = j_str
return j_str
def arraycopy(frame: Frame):
local_vars = frame.local_vars
# 从局部变量表中获取5个参数
src = local_vars.get_ref(0)
src_pos = local_vars.get_numeric(1)
dest = local_vars.get_ref(2)
dest_pos = local_vars.get_numeric(3)
length = local_vars.get_numeric(4)
# 源数据和目标数组都不能为None，否则按照System类的Javadoc应抛出NullPointerException异常
if src is None and dest is None:
raise RuntimeError("java.lang.NullPointerException")
# 源数据和目标数据必须兼容才能拷贝，否则抛出ArrayStoreException异常
if not check_array_copy(src, dest):
raise RuntimeError("java.lang.ArrayStoreException")
# 检查src_pos、dest_pos和length参数，有问题则抛出IndexOutOfBoundsException异常
if src_pos < 0 or dest_pos < 0 or length < 0 \
or src_pos + length > src.array_length() \
or dest_pos + length > dest.array_length():
raise RuntimeError("java.lang.IndexOutOfBoundsException")
Object.array_copy(src, dest, src_pos, dest_pos, length)
def new_array(self, count):
from rtda.heap.Object import Object
if not self.is_array():
raise RuntimeError("Not array class: " + self.name)
return Object(self, [0 for _ in range(count)])
def new_object(self):
from rtda.heap.Object import Object
return Object.new_object(self)
