kaitai: adjustments and rearrangements for python2/3 compat

1 files changed, 1083 insertions, 0 deletions

diff --git a/python/examples/kaitai/dex.py b/python/examples/kaitai/dex.py
new file mode 100644
index 00000000..f2dad696
--- /dev/null
+++ b/python/examples/kaitai/dex.py
@@ -0,0 +1,1083 @@
+# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
+
+from pkg_resources import parse_version
+from .kaitaistruct import __version__ as ks_version, KaitaiStruct, KaitaiStream, BytesIO
+from enum import Enum
+import collections
+
+
+if parse_version(ks_version) < parse_version('0.7'):
+    raise Exception("Incompatible Kaitai Struct Python API: 0.7 or later is required, but you have %s" % (ks_version))
+
+from vlq_base128_le import VlqBase128Le
+class Dex(KaitaiStruct):
+    """Android OS applications executables are typically stored in its own
+    format, optimized for more efficient execution in Dalvik virtual
+    machine.
+    
+    This format is loosely similar to Java .class file format and
+    generally holds the similar set of data: i.e. classes, methods,
+    fields, annotations, etc.
+    
+    .. seealso::
+       Source - https://source.android.com/devices/tech/dalvik/dex-format
+    """
+
+    class ClassAccessFlags(Enum):
+        public = 1
+        private = 2
+        protected = 4
+        static = 8
+        final = 16
+        interface = 512
+        abstract = 1024
+        synthetic = 4096
+        annotation = 8192
+        enum = 16384
+    SEQ_FIELDS = ["header"]
+    def __init__(self, _io, _parent=None, _root=None):
+        self._io = _io
+        self._parent = _parent
+        self._root = _root if _root else self
+        self._debug = collections.defaultdict(dict)
+
+    def _read(self):
+        self._debug['header']['start'] = self._io.pos()
+        self.header = self._root.HeaderItem(self._io, self, self._root)
+        self.header._read()
+        self._debug['header']['end'] = self._io.pos()
+
+    class HeaderItem(KaitaiStruct):
+
+        class EndianConstant(Enum):
+            endian_constant = 305419896
+            reverse_endian_constant = 2018915346
+        SEQ_FIELDS = ["magic", "version_str", "checksum", "signature", "file_size", "header_size", "endian_tag", "link_size", "link_off", "map_off", "string_ids_size", "string_ids_off", "type_ids_size", "type_ids_off", "proto_ids_size", "proto_ids_off", "field_ids_size", "field_ids_off", "method_ids_size", "method_ids_off", "class_defs_size", "class_defs_off", "data_size", "data_off"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['magic']['start'] = self._io.pos()
+            self.magic = self._io.ensure_fixed_contents(b"\x64\x65\x78\x0A")
+            self._debug['magic']['end'] = self._io.pos()
+            self._debug['version_str']['start'] = self._io.pos()
+            self.version_str = (KaitaiStream.bytes_terminate(self._io.read_bytes(4), 0, False)).decode(u"ascii")
+            self._debug['version_str']['end'] = self._io.pos()
+            self._debug['checksum']['start'] = self._io.pos()
+            self.checksum = self._io.read_u4le()
+            self._debug['checksum']['end'] = self._io.pos()
+            self._debug['signature']['start'] = self._io.pos()
+            self.signature = self._io.read_bytes(20)
+            self._debug['signature']['end'] = self._io.pos()
+            self._debug['file_size']['start'] = self._io.pos()
+            self.file_size = self._io.read_u4le()
+            self._debug['file_size']['end'] = self._io.pos()
+            self._debug['header_size']['start'] = self._io.pos()
+            self.header_size = self._io.read_u4le()
+            self._debug['header_size']['end'] = self._io.pos()
+            self._debug['endian_tag']['start'] = self._io.pos()
+            self.endian_tag = KaitaiStream.resolve_enum(self._root.HeaderItem.EndianConstant, self._io.read_u4le())
+            self._debug['endian_tag']['end'] = self._io.pos()
+            self._debug['link_size']['start'] = self._io.pos()
+            self.link_size = self._io.read_u4le()
+            self._debug['link_size']['end'] = self._io.pos()
+            self._debug['link_off']['start'] = self._io.pos()
+            self.link_off = self._io.read_u4le()
+            self._debug['link_off']['end'] = self._io.pos()
+            self._debug['map_off']['start'] = self._io.pos()
+            self.map_off = self._io.read_u4le()
+            self._debug['map_off']['end'] = self._io.pos()
+            self._debug['string_ids_size']['start'] = self._io.pos()
+            self.string_ids_size = self._io.read_u4le()
+            self._debug['string_ids_size']['end'] = self._io.pos()
+            self._debug['string_ids_off']['start'] = self._io.pos()
+            self.string_ids_off = self._io.read_u4le()
+            self._debug['string_ids_off']['end'] = self._io.pos()
+            self._debug['type_ids_size']['start'] = self._io.pos()
+            self.type_ids_size = self._io.read_u4le()
+            self._debug['type_ids_size']['end'] = self._io.pos()
+            self._debug['type_ids_off']['start'] = self._io.pos()
+            self.type_ids_off = self._io.read_u4le()
+            self._debug['type_ids_off']['end'] = self._io.pos()
+            self._debug['proto_ids_size']['start'] = self._io.pos()
+            self.proto_ids_size = self._io.read_u4le()
+            self._debug['proto_ids_size']['end'] = self._io.pos()
+            self._debug['proto_ids_off']['start'] = self._io.pos()
+            self.proto_ids_off = self._io.read_u4le()
+            self._debug['proto_ids_off']['end'] = self._io.pos()
+            self._debug['field_ids_size']['start'] = self._io.pos()
+            self.field_ids_size = self._io.read_u4le()
+            self._debug['field_ids_size']['end'] = self._io.pos()
+            self._debug['field_ids_off']['start'] = self._io.pos()
+            self.field_ids_off = self._io.read_u4le()
+            self._debug['field_ids_off']['end'] = self._io.pos()
+            self._debug['method_ids_size']['start'] = self._io.pos()
+            self.method_ids_size = self._io.read_u4le()
+            self._debug['method_ids_size']['end'] = self._io.pos()
+            self._debug['method_ids_off']['start'] = self._io.pos()
+            self.method_ids_off = self._io.read_u4le()
+            self._debug['method_ids_off']['end'] = self._io.pos()
+            self._debug['class_defs_size']['start'] = self._io.pos()
+            self.class_defs_size = self._io.read_u4le()
+            self._debug['class_defs_size']['end'] = self._io.pos()
+            self._debug['class_defs_off']['start'] = self._io.pos()
+            self.class_defs_off = self._io.read_u4le()
+            self._debug['class_defs_off']['end'] = self._io.pos()
+            self._debug['data_size']['start'] = self._io.pos()
+            self.data_size = self._io.read_u4le()
+            self._debug['data_size']['end'] = self._io.pos()
+            self._debug['data_off']['start'] = self._io.pos()
+            self.data_off = self._io.read_u4le()
+            self._debug['data_off']['end'] = self._io.pos()
+
+
+    class MapList(KaitaiStruct):
+        SEQ_FIELDS = ["size", "list"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['size']['start'] = self._io.pos()
+            self.size = self._io.read_u4le()
+            self._debug['size']['end'] = self._io.pos()
+            self._debug['list']['start'] = self._io.pos()
+            self.list = [None] * (self.size)
+            for i in range(self.size):
+                if not 'arr' in self._debug['list']:
+                    self._debug['list']['arr'] = []
+                self._debug['list']['arr'].append({'start': self._io.pos()})
+                _t_list = self._root.MapItem(self._io, self, self._root)
+                _t_list._read()
+                self.list[i] = _t_list
+                self._debug['list']['arr'][i]['end'] = self._io.pos()
+
+            self._debug['list']['end'] = self._io.pos()
+
+
+    class EncodedValue(KaitaiStruct):
+
+        class ValueTypeEnum(Enum):
+            byte = 0
+            short = 2
+            char = 3
+            int = 4
+            long = 6
+            float = 16
+            double = 17
+            method_type = 21
+            method_handle = 22
+            string = 23
+            type = 24
+            field = 25
+            method = 26
+            enum = 27
+            array = 28
+            annotation = 29
+            null = 30
+            boolean = 31
+        SEQ_FIELDS = ["value_arg", "value_type", "value"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['value_arg']['start'] = self._io.pos()
+            self.value_arg = self._io.read_bits_int(3)
+            self._debug['value_arg']['end'] = self._io.pos()
+            self._debug['value_type']['start'] = self._io.pos()
+            self.value_type = KaitaiStream.resolve_enum(self._root.EncodedValue.ValueTypeEnum, self._io.read_bits_int(5))
+            self._debug['value_type']['end'] = self._io.pos()
+            self._io.align_to_byte()
+            self._debug['value']['start'] = self._io.pos()
+            _on = self.value_type
+            if _on == self._root.EncodedValue.ValueTypeEnum.int:
+                self.value = self._io.read_s4le()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.annotation:
+                self.value = self._root.EncodedAnnotation(self._io, self, self._root)
+                self.value._read()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.long:
+                self.value = self._io.read_s8le()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.method_handle:
+                self.value = self._io.read_u4le()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.byte:
+                self.value = self._io.read_s1()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.array:
+                self.value = self._root.EncodedArray(self._io, self, self._root)
+                self.value._read()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.method_type:
+                self.value = self._io.read_u4le()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.short:
+                self.value = self._io.read_s2le()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.method:
+                self.value = self._io.read_u4le()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.double:
+                self.value = self._io.read_f8le()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.float:
+                self.value = self._io.read_f4le()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.type:
+                self.value = self._io.read_u4le()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.enum:
+                self.value = self._io.read_u4le()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.field:
+                self.value = self._io.read_u4le()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.string:
+                self.value = self._io.read_u4le()
+            elif _on == self._root.EncodedValue.ValueTypeEnum.char:
+                self.value = self._io.read_u2le()
+            self._debug['value']['end'] = self._io.pos()
+
+
+    class CallSiteIdItem(KaitaiStruct):
+        SEQ_FIELDS = ["call_site_off"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['call_site_off']['start'] = self._io.pos()
+            self.call_site_off = self._io.read_u4le()
+            self._debug['call_site_off']['end'] = self._io.pos()
+
+
+    class MethodIdItem(KaitaiStruct):
+        SEQ_FIELDS = ["class_idx", "proto_idx", "name_idx"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['class_idx']['start'] = self._io.pos()
+            self.class_idx = self._io.read_u2le()
+            self._debug['class_idx']['end'] = self._io.pos()
+            self._debug['proto_idx']['start'] = self._io.pos()
+            self.proto_idx = self._io.read_u2le()
+            self._debug['proto_idx']['end'] = self._io.pos()
+            self._debug['name_idx']['start'] = self._io.pos()
+            self.name_idx = self._io.read_u4le()
+            self._debug['name_idx']['end'] = self._io.pos()
+
+        @property
+        def class_name(self):
+            """the definer of this method."""
+            if hasattr(self, '_m_class_name'):
+                return self._m_class_name if hasattr(self, '_m_class_name') else None
+
+            self._m_class_name = self._root.type_ids[self.class_idx].type_name
+            return self._m_class_name if hasattr(self, '_m_class_name') else None
+
+        @property
+        def proto_desc(self):
+            """the short-form descriptor of the prototype of this method."""
+            if hasattr(self, '_m_proto_desc'):
+                return self._m_proto_desc if hasattr(self, '_m_proto_desc') else None
+
+            self._m_proto_desc = self._root.proto_ids[self.proto_idx].shorty_desc
+            return self._m_proto_desc if hasattr(self, '_m_proto_desc') else None
+
+        @property
+        def method_name(self):
+            """the name of this method."""
+            if hasattr(self, '_m_method_name'):
+                return self._m_method_name if hasattr(self, '_m_method_name') else None
+
+            self._m_method_name = self._root.string_ids[self.name_idx].value.data
+            return self._m_method_name if hasattr(self, '_m_method_name') else None
+
+
+    class TypeItem(KaitaiStruct):
+        SEQ_FIELDS = ["type_idx"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['type_idx']['start'] = self._io.pos()
+            self.type_idx = self._io.read_u2le()
+            self._debug['type_idx']['end'] = self._io.pos()
+
+        @property
+        def value(self):
+            if hasattr(self, '_m_value'):
+                return self._m_value if hasattr(self, '_m_value') else None
+
+            self._m_value = self._root.type_ids[self.type_idx].type_name
+            return self._m_value if hasattr(self, '_m_value') else None
+
+
+    class TypeIdItem(KaitaiStruct):
+        SEQ_FIELDS = ["descriptor_idx"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['descriptor_idx']['start'] = self._io.pos()
+            self.descriptor_idx = self._io.read_u4le()
+            self._debug['descriptor_idx']['end'] = self._io.pos()
+
+        @property
+        def type_name(self):
+            if hasattr(self, '_m_type_name'):
+                return self._m_type_name if hasattr(self, '_m_type_name') else None
+
+            self._m_type_name = self._root.string_ids[self.descriptor_idx].value.data
+            return self._m_type_name if hasattr(self, '_m_type_name') else None
+
+
+    class AnnotationElement(KaitaiStruct):
+        SEQ_FIELDS = ["name_idx", "value"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['name_idx']['start'] = self._io.pos()
+            self.name_idx = VlqBase128Le(self._io)
+            self.name_idx._read()
+            self._debug['name_idx']['end'] = self._io.pos()
+            self._debug['value']['start'] = self._io.pos()
+            self.value = self._root.EncodedValue(self._io, self, self._root)
+            self.value._read()
+            self._debug['value']['end'] = self._io.pos()
+
+
+    class EncodedField(KaitaiStruct):
+        SEQ_FIELDS = ["field_idx_diff", "access_flags"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['field_idx_diff']['start'] = self._io.pos()
+            self.field_idx_diff = VlqBase128Le(self._io)
+            self.field_idx_diff._read()
+            self._debug['field_idx_diff']['end'] = self._io.pos()
+            self._debug['access_flags']['start'] = self._io.pos()
+            self.access_flags = VlqBase128Le(self._io)
+            self.access_flags._read()
+            self._debug['access_flags']['end'] = self._io.pos()
+
+
+    class EncodedArrayItem(KaitaiStruct):
+        SEQ_FIELDS = ["value"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['value']['start'] = self._io.pos()
+            self.value = self._root.EncodedArray(self._io, self, self._root)
+            self.value._read()
+            self._debug['value']['end'] = self._io.pos()
+
+
+    class ClassDataItem(KaitaiStruct):
+        SEQ_FIELDS = ["static_fields_size", "instance_fields_size", "direct_methods_size", "virtual_methods_size", "static_fields", "instance_fields", "direct_methods", "virtual_methods"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['static_fields_size']['start'] = self._io.pos()
+            self.static_fields_size = VlqBase128Le(self._io)
+            self.static_fields_size._read()
+            self._debug['static_fields_size']['end'] = self._io.pos()
+            self._debug['instance_fields_size']['start'] = self._io.pos()
+            self.instance_fields_size = VlqBase128Le(self._io)
+            self.instance_fields_size._read()
+            self._debug['instance_fields_size']['end'] = self._io.pos()
+            self._debug['direct_methods_size']['start'] = self._io.pos()
+            self.direct_methods_size = VlqBase128Le(self._io)
+            self.direct_methods_size._read()
+            self._debug['direct_methods_size']['end'] = self._io.pos()
+            self._debug['virtual_methods_size']['start'] = self._io.pos()
+            self.virtual_methods_size = VlqBase128Le(self._io)
+            self.virtual_methods_size._read()
+            self._debug['virtual_methods_size']['end'] = self._io.pos()
+            self._debug['static_fields']['start'] = self._io.pos()
+            self.static_fields = [None] * (self.static_fields_size.value)
+            for i in range(self.static_fields_size.value):
+                if not 'arr' in self._debug['static_fields']:
+                    self._debug['static_fields']['arr'] = []
+                self._debug['static_fields']['arr'].append({'start': self._io.pos()})
+                _t_static_fields = self._root.EncodedField(self._io, self, self._root)
+                _t_static_fields._read()
+                self.static_fields[i] = _t_static_fields
+                self._debug['static_fields']['arr'][i]['end'] = self._io.pos()
+
+            self._debug['static_fields']['end'] = self._io.pos()
+            self._debug['instance_fields']['start'] = self._io.pos()
+            self.instance_fields = [None] * (self.instance_fields_size.value)
+            for i in range(self.instance_fields_size.value):
+                if not 'arr' in self._debug['instance_fields']:
+                    self._debug['instance_fields']['arr'] = []
+                self._debug['instance_fields']['arr'].append({'start': self._io.pos()})
+                _t_instance_fields = self._root.EncodedField(self._io, self, self._root)
+                _t_instance_fields._read()
+                self.instance_fields[i] = _t_instance_fields
+                self._debug['instance_fields']['arr'][i]['end'] = self._io.pos()
+
+            self._debug['instance_fields']['end'] = self._io.pos()
+            self._debug['direct_methods']['start'] = self._io.pos()
+            self.direct_methods = [None] * (self.direct_methods_size.value)
+            for i in range(self.direct_methods_size.value):
+                if not 'arr' in self._debug['direct_methods']:
+                    self._debug['direct_methods']['arr'] = []
+                self._debug['direct_methods']['arr'].append({'start': self._io.pos()})
+                _t_direct_methods = self._root.EncodedMethod(self._io, self, self._root)
+                _t_direct_methods._read()
+                self.direct_methods[i] = _t_direct_methods
+                self._debug['direct_methods']['arr'][i]['end'] = self._io.pos()
+
+            self._debug['direct_methods']['end'] = self._io.pos()
+            self._debug['virtual_methods']['start'] = self._io.pos()
+            self.virtual_methods = [None] * (self.virtual_methods_size.value)
+            for i in range(self.virtual_methods_size.value):
+                if not 'arr' in self._debug['virtual_methods']:
+                    self._debug['virtual_methods']['arr'] = []
+                self._debug['virtual_methods']['arr'].append({'start': self._io.pos()})
+                _t_virtual_methods = self._root.EncodedMethod(self._io, self, self._root)
+                _t_virtual_methods._read()
+                self.virtual_methods[i] = _t_virtual_methods
+                self._debug['virtual_methods']['arr'][i]['end'] = self._io.pos()
+
+            self._debug['virtual_methods']['end'] = self._io.pos()
+
+
+    class FieldIdItem(KaitaiStruct):
+        SEQ_FIELDS = ["class_idx", "type_idx", "name_idx"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['class_idx']['start'] = self._io.pos()
+            self.class_idx = self._io.read_u2le()
+            self._debug['class_idx']['end'] = self._io.pos()
+            self._debug['type_idx']['start'] = self._io.pos()
+            self.type_idx = self._io.read_u2le()
+            self._debug['type_idx']['end'] = self._io.pos()
+            self._debug['name_idx']['start'] = self._io.pos()
+            self.name_idx = self._io.read_u4le()
+            self._debug['name_idx']['end'] = self._io.pos()
+
+        @property
+        def class_name(self):
+            """the definer of this field."""
+            if hasattr(self, '_m_class_name'):
+                return self._m_class_name if hasattr(self, '_m_class_name') else None
+
+            self._m_class_name = self._root.type_ids[self.class_idx].type_name
+            return self._m_class_name if hasattr(self, '_m_class_name') else None
+
+        @property
+        def type_name(self):
+            """the type of this field."""
+            if hasattr(self, '_m_type_name'):
+                return self._m_type_name if hasattr(self, '_m_type_name') else None
+
+            self._m_type_name = self._root.type_ids[self.type_idx].type_name
+            return self._m_type_name if hasattr(self, '_m_type_name') else None
+
+        @property
+        def field_name(self):
+            """the name of this field."""
+            if hasattr(self, '_m_field_name'):
+                return self._m_field_name if hasattr(self, '_m_field_name') else None
+
+            self._m_field_name = self._root.string_ids[self.name_idx].value.data
+            return self._m_field_name if hasattr(self, '_m_field_name') else None
+
+
+    class EncodedAnnotation(KaitaiStruct):
+        SEQ_FIELDS = ["type_idx", "size", "elements"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['type_idx']['start'] = self._io.pos()
+            self.type_idx = VlqBase128Le(self._io)
+            self.type_idx._read()
+            self._debug['type_idx']['end'] = self._io.pos()
+            self._debug['size']['start'] = self._io.pos()
+            self.size = VlqBase128Le(self._io)
+            self.size._read()
+            self._debug['size']['end'] = self._io.pos()
+            self._debug['elements']['start'] = self._io.pos()
+            self.elements = [None] * (self.size.value)
+            for i in range(self.size.value):
+                if not 'arr' in self._debug['elements']:
+                    self._debug['elements']['arr'] = []
+                self._debug['elements']['arr'].append({'start': self._io.pos()})
+                _t_elements = self._root.AnnotationElement(self._io, self, self._root)
+                _t_elements._read()
+                self.elements[i] = _t_elements
+                self._debug['elements']['arr'][i]['end'] = self._io.pos()
+
+            self._debug['elements']['end'] = self._io.pos()
+
+
+    class ClassDefItem(KaitaiStruct):
+        SEQ_FIELDS = ["class_idx", "access_flags", "superclass_idx", "interfaces_off", "source_file_idx", "annotations_off", "class_data_off", "static_values_off"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['class_idx']['start'] = self._io.pos()
+            self.class_idx = self._io.read_u4le()
+            self._debug['class_idx']['end'] = self._io.pos()
+            self._debug['access_flags']['start'] = self._io.pos()
+            self.access_flags = KaitaiStream.resolve_enum(self._root.ClassAccessFlags, self._io.read_u4le())
+            self._debug['access_flags']['end'] = self._io.pos()
+            self._debug['superclass_idx']['start'] = self._io.pos()
+            self.superclass_idx = self._io.read_u4le()
+            self._debug['superclass_idx']['end'] = self._io.pos()
+            self._debug['interfaces_off']['start'] = self._io.pos()
+            self.interfaces_off = self._io.read_u4le()
+            self._debug['interfaces_off']['end'] = self._io.pos()
+            self._debug['source_file_idx']['start'] = self._io.pos()
+            self.source_file_idx = self._io.read_u4le()
+            self._debug['source_file_idx']['end'] = self._io.pos()
+            self._debug['annotations_off']['start'] = self._io.pos()
+            self.annotations_off = self._io.read_u4le()
+            self._debug['annotations_off']['end'] = self._io.pos()
+            self._debug['class_data_off']['start'] = self._io.pos()
+            self.class_data_off = self._io.read_u4le()
+            self._debug['class_data_off']['end'] = self._io.pos()
+            self._debug['static_values_off']['start'] = self._io.pos()
+            self.static_values_off = self._io.read_u4le()
+            self._debug['static_values_off']['end'] = self._io.pos()
+
+        @property
+        def type_name(self):
+            if hasattr(self, '_m_type_name'):
+                return self._m_type_name if hasattr(self, '_m_type_name') else None
+
+            self._m_type_name = self._root.type_ids[self.class_idx].type_name
+            return self._m_type_name if hasattr(self, '_m_type_name') else None
+
+        @property
+        def class_data(self):
+            if hasattr(self, '_m_class_data'):
+                return self._m_class_data if hasattr(self, '_m_class_data') else None
+
+            if self.class_data_off != 0:
+                _pos = self._io.pos()
+                self._io.seek(self.class_data_off)
+                self._debug['_m_class_data']['start'] = self._io.pos()
+                self._m_class_data = self._root.ClassDataItem(self._io, self, self._root)
+                self._m_class_data._read()
+                self._debug['_m_class_data']['end'] = self._io.pos()
+                self._io.seek(_pos)
+
+            return self._m_class_data if hasattr(self, '_m_class_data') else None
+
+        @property
+        def static_values(self):
+            if hasattr(self, '_m_static_values'):
+                return self._m_static_values if hasattr(self, '_m_static_values') else None
+
+            if self.static_values_off != 0:
+                _pos = self._io.pos()
+                self._io.seek(self.static_values_off)
+                self._debug['_m_static_values']['start'] = self._io.pos()
+                self._m_static_values = self._root.EncodedArrayItem(self._io, self, self._root)
+                self._m_static_values._read()
+                self._debug['_m_static_values']['end'] = self._io.pos()
+                self._io.seek(_pos)
+
+            return self._m_static_values if hasattr(self, '_m_static_values') else None
+
+
+    class TypeList(KaitaiStruct):
+        SEQ_FIELDS = ["size", "list"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['size']['start'] = self._io.pos()
+            self.size = self._io.read_u4le()
+            self._debug['size']['end'] = self._io.pos()
+            self._debug['list']['start'] = self._io.pos()
+            self.list = [None] * (self.size)
+            for i in range(self.size):
+                if not 'arr' in self._debug['list']:
+                    self._debug['list']['arr'] = []
+                self._debug['list']['arr'].append({'start': self._io.pos()})
+                _t_list = self._root.TypeItem(self._io, self, self._root)
+                _t_list._read()
+                self.list[i] = _t_list
+                self._debug['list']['arr'][i]['end'] = self._io.pos()
+
+            self._debug['list']['end'] = self._io.pos()
+
+
+    class StringIdItem(KaitaiStruct):
+        SEQ_FIELDS = ["string_data_off"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['string_data_off']['start'] = self._io.pos()
+            self.string_data_off = self._io.read_u4le()
+            self._debug['string_data_off']['end'] = self._io.pos()
+
+        class StringDataItem(KaitaiStruct):
+            SEQ_FIELDS = ["utf16_size", "data"]
+            def __init__(self, _io, _parent=None, _root=None):
+                self._io = _io
+                self._parent = _parent
+                self._root = _root if _root else self
+                self._debug = collections.defaultdict(dict)
+
+            def _read(self):
+                self._debug['utf16_size']['start'] = self._io.pos()
+                self.utf16_size = VlqBase128Le(self._io)
+                self.utf16_size._read()
+                self._debug['utf16_size']['end'] = self._io.pos()
+                self._debug['data']['start'] = self._io.pos()
+                self.data = (self._io.read_bytes(self.utf16_size.value)).decode(u"ascii")
+                self._debug['data']['end'] = self._io.pos()
+
+
+        @property
+        def value(self):
+            if hasattr(self, '_m_value'):
+                return self._m_value if hasattr(self, '_m_value') else None
+
+            _pos = self._io.pos()
+            self._io.seek(self.string_data_off)
+            self._debug['_m_value']['start'] = self._io.pos()
+            self._m_value = self._root.StringIdItem.StringDataItem(self._io, self, self._root)
+            self._m_value._read()
+            self._debug['_m_value']['end'] = self._io.pos()
+            self._io.seek(_pos)
+            return self._m_value if hasattr(self, '_m_value') else None
+
+
+    class ProtoIdItem(KaitaiStruct):
+        SEQ_FIELDS = ["shorty_idx", "return_type_idx", "parameters_off"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['shorty_idx']['start'] = self._io.pos()
+            self.shorty_idx = self._io.read_u4le()
+            self._debug['shorty_idx']['end'] = self._io.pos()
+            self._debug['return_type_idx']['start'] = self._io.pos()
+            self.return_type_idx = self._io.read_u4le()
+            self._debug['return_type_idx']['end'] = self._io.pos()
+            self._debug['parameters_off']['start'] = self._io.pos()
+            self.parameters_off = self._io.read_u4le()
+            self._debug['parameters_off']['end'] = self._io.pos()
+
+        @property
+        def shorty_desc(self):
+            """short-form descriptor string of this prototype, as pointed to by shorty_idx."""
+            if hasattr(self, '_m_shorty_desc'):
+                return self._m_shorty_desc if hasattr(self, '_m_shorty_desc') else None
+
+            self._m_shorty_desc = self._root.string_ids[self.shorty_idx].value.data
+            return self._m_shorty_desc if hasattr(self, '_m_shorty_desc') else None
+
+        @property
+        def params_types(self):
+            """list of parameter types for this prototype."""
+            if hasattr(self, '_m_params_types'):
+                return self._m_params_types if hasattr(self, '_m_params_types') else None
+
+            if self.parameters_off != 0:
+                io = self._root._io
+                _pos = io.pos()
+                io.seek(self.parameters_off)
+                self._debug['_m_params_types']['start'] = io.pos()
+                self._m_params_types = self._root.TypeList(io, self, self._root)
+                self._m_params_types._read()
+                self._debug['_m_params_types']['end'] = io.pos()
+                io.seek(_pos)
+
+            return self._m_params_types if hasattr(self, '_m_params_types') else None
+
+        @property
+        def return_type(self):
+            """return type of this prototype."""
+            if hasattr(self, '_m_return_type'):
+                return self._m_return_type if hasattr(self, '_m_return_type') else None
+
+            self._m_return_type = self._root.type_ids[self.return_type_idx].type_name
+            return self._m_return_type if hasattr(self, '_m_return_type') else None
+
+
+    class EncodedMethod(KaitaiStruct):
+        SEQ_FIELDS = ["method_idx_diff", "access_flags", "code_off"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['method_idx_diff']['start'] = self._io.pos()
+            self.method_idx_diff = VlqBase128Le(self._io)
+            self.method_idx_diff._read()
+            self._debug['method_idx_diff']['end'] = self._io.pos()
+            self._debug['access_flags']['start'] = self._io.pos()
+            self.access_flags = VlqBase128Le(self._io)
+            self.access_flags._read()
+            self._debug['access_flags']['end'] = self._io.pos()
+            self._debug['code_off']['start'] = self._io.pos()
+            self.code_off = VlqBase128Le(self._io)
+            self.code_off._read()
+            self._debug['code_off']['end'] = self._io.pos()
+
+
+    class MapItem(KaitaiStruct):
+
+        class MapItemType(Enum):
+            header_item = 0
+            string_id_item = 1
+            type_id_item = 2
+            proto_id_item = 3
+            field_id_item = 4
+            method_id_item = 5
+            class_def_item = 6
+            call_site_id_item = 7
+            method_handle_item = 8
+            map_list = 4096
+            type_list = 4097
+            annotation_set_ref_list = 4098
+            annotation_set_item = 4099
+            class_data_item = 8192
+            code_item = 8193
+            string_data_item = 8194
+            debug_info_item = 8195
+            annotation_item = 8196
+            encoded_array_item = 8197
+            annotations_directory_item = 8198
+        SEQ_FIELDS = ["type", "unused", "size", "offset"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['type']['start'] = self._io.pos()
+            self.type = KaitaiStream.resolve_enum(self._root.MapItem.MapItemType, self._io.read_u2le())
+            self._debug['type']['end'] = self._io.pos()
+            self._debug['unused']['start'] = self._io.pos()
+            self.unused = self._io.read_u2le()
+            self._debug['unused']['end'] = self._io.pos()
+            self._debug['size']['start'] = self._io.pos()
+            self.size = self._io.read_u4le()
+            self._debug['size']['end'] = self._io.pos()
+            self._debug['offset']['start'] = self._io.pos()
+            self.offset = self._io.read_u4le()
+            self._debug['offset']['end'] = self._io.pos()
+
+
+    class EncodedArray(KaitaiStruct):
+        SEQ_FIELDS = ["size", "values"]
+        def __init__(self, _io, _parent=None, _root=None):
+            self._io = _io
+            self._parent = _parent
+            self._root = _root if _root else self
+            self._debug = collections.defaultdict(dict)
+
+        def _read(self):
+            self._debug['size']['start'] = self._io.pos()
+            self.size = VlqBase128Le(self._io)
+            self.size._read()
+            self._debug['size']['end'] = self._io.pos()
+            self._debug['values']['start'] = self._io.pos()
+            self.values = [None] * (self.size.value)
+            for i in range(self.size.value):
+                if not 'arr' in self._debug['values']:
+                    self._debug['values']['arr'] = []
+                self._debug['values']['arr'].append({'start': self._io.pos()})
+                _t_values = self._root.EncodedValue(self._io, self, self._root)
+                _t_values._read()
+                self.values[i] = _t_values
+                self._debug['values']['arr'][i]['end'] = self._io.pos()
+
+            self._debug['values']['end'] = self._io.pos()
+
+
+    @property
+    def string_ids(self):
+        """string identifiers list.
+        
+        These are identifiers for all the strings used by this file, either for 
+        internal naming (e.g., type descriptors) or as constant objects referred to by code.
+        
+        This list must be sorted by string contents, using UTF-16 code point values
+        (not in a locale-sensitive manner), and it must not contain any duplicate entries.    
+        """
+        if hasattr(self, '_m_string_ids'):
+            return self._m_string_ids if hasattr(self, '_m_string_ids') else None
+
+        _pos = self._io.pos()
+        self._io.seek(self.header.string_ids_off)
+        self._debug['_m_string_ids']['start'] = self._io.pos()
+        self._m_string_ids = [None] * (self.header.string_ids_size)
+        for i in range(self.header.string_ids_size):
+            if not 'arr' in self._debug['_m_string_ids']:
+                self._debug['_m_string_ids']['arr'] = []
+            self._debug['_m_string_ids']['arr'].append({'start': self._io.pos()})
+            _t__m_string_ids = self._root.StringIdItem(self._io, self, self._root)
+            _t__m_string_ids._read()
+            self._m_string_ids[i] = _t__m_string_ids
+            self._debug['_m_string_ids']['arr'][i]['end'] = self._io.pos()
+
+        self._debug['_m_string_ids']['end'] = self._io.pos()
+        self._io.seek(_pos)
+        return self._m_string_ids if hasattr(self, '_m_string_ids') else None
+
+    @property
+    def method_ids(self):
+        """method identifiers list.
+        
+        These are identifiers for all methods referred to by this file,
+        whether defined in the file or not.
+        
+        This list must be sorted, where the defining type (by type_id index 
+        is the major order, method name (by string_id index) is the intermediate
+        order, and method prototype (by proto_id index) is the minor order.
+        
+        The list must not contain any duplicate entries.
+        """
+        if hasattr(self, '_m_method_ids'):
+            return self._m_method_ids if hasattr(self, '_m_method_ids') else None
+
+        _pos = self._io.pos()
+        self._io.seek(self.header.method_ids_off)
+        self._debug['_m_method_ids']['start'] = self._io.pos()
+        self._m_method_ids = [None] * (self.header.method_ids_size)
+        for i in range(self.header.method_ids_size):
+            if not 'arr' in self._debug['_m_method_ids']:
+                self._debug['_m_method_ids']['arr'] = []
+            self._debug['_m_method_ids']['arr'].append({'start': self._io.pos()})
+            _t__m_method_ids = self._root.MethodIdItem(self._io, self, self._root)
+            _t__m_method_ids._read()
+            self._m_method_ids[i] = _t__m_method_ids
+            self._debug['_m_method_ids']['arr'][i]['end'] = self._io.pos()
+
+        self._debug['_m_method_ids']['end'] = self._io.pos()
+        self._io.seek(_pos)
+        return self._m_method_ids if hasattr(self, '_m_method_ids') else None
+
+    @property
+    def link_data(self):
+        """data used in statically linked files.
+        
+        The format of the data in this section is left unspecified by this document.
+        
+        This section is empty in unlinked files, and runtime implementations may
+        use it as they see fit.
+        """
+        if hasattr(self, '_m_link_data'):
+            return self._m_link_data if hasattr(self, '_m_link_data') else None
+
+        _pos = self._io.pos()
+        self._io.seek(self.header.link_off)
+        self._debug['_m_link_data']['start'] = self._io.pos()
+        self._m_link_data = self._io.read_bytes(self.header.link_size)
+        self._debug['_m_link_data']['end'] = self._io.pos()
+        self._io.seek(_pos)
+        return self._m_link_data if hasattr(self, '_m_link_data') else None
+
+    @property
+    def map(self):
+        if hasattr(self, '_m_map'):
+            return self._m_map if hasattr(self, '_m_map') else None
+
+        _pos = self._io.pos()
+        self._io.seek(self.header.map_off)
+        self._debug['_m_map']['start'] = self._io.pos()
+        self._m_map = self._root.MapList(self._io, self, self._root)
+        self._m_map._read()
+        self._debug['_m_map']['end'] = self._io.pos()
+        self._io.seek(_pos)
+        return self._m_map if hasattr(self, '_m_map') else None
+
+    @property
+    def class_defs(self):
+        """class definitions list.
+        
+        The classes must be ordered such that a given class's superclass and
+        implemented interfaces appear in the list earlier than the referring class.
+        
+        Furthermore, it is invalid for a definition for the same-named class to
+        appear more than once in the list.
+        """
+        if hasattr(self, '_m_class_defs'):
+            return self._m_class_defs if hasattr(self, '_m_class_defs') else None
+
+        _pos = self._io.pos()
+        self._io.seek(self.header.class_defs_off)
+        self._debug['_m_class_defs']['start'] = self._io.pos()
+        self._m_class_defs = [None] * (self.header.class_defs_size)
+        for i in range(self.header.class_defs_size):
+            if not 'arr' in self._debug['_m_class_defs']:
+                self._debug['_m_class_defs']['arr'] = []
+            self._debug['_m_class_defs']['arr'].append({'start': self._io.pos()})
+            _t__m_class_defs = self._root.ClassDefItem(self._io, self, self._root)
+            _t__m_class_defs._read()
+            self._m_class_defs[i] = _t__m_class_defs
+            self._debug['_m_class_defs']['arr'][i]['end'] = self._io.pos()
+
+        self._debug['_m_class_defs']['end'] = self._io.pos()
+        self._io.seek(_pos)
+        return self._m_class_defs if hasattr(self, '_m_class_defs') else None
+
+    @property
+    def data(self):
+        """data area, containing all the support data for the tables listed above.
+        
+        Different items have different alignment requirements, and padding bytes
+        are inserted before each item if necessary to achieve proper alignment.
+        """
+        if hasattr(self, '_m_data'):
+            return self._m_data if hasattr(self, '_m_data') else None
+
+        _pos = self._io.pos()
+        self._io.seek(self.header.data_off)
+        self._debug['_m_data']['start'] = self._io.pos()
+        self._m_data = self._io.read_bytes(self.header.data_size)
+        self._debug['_m_data']['end'] = self._io.pos()
+        self._io.seek(_pos)
+        return self._m_data if hasattr(self, '_m_data') else None
+
+    @property
+    def type_ids(self):
+        """type identifiers list. 
+        
+        These are identifiers for all types (classes, arrays, or primitive types) 
+        referred to by this file, whether defined in the file or not.
+        
+        This list must be sorted by string_id index, and it must not contain any duplicate entries.
+        """
+        if hasattr(self, '_m_type_ids'):
+            return self._m_type_ids if hasattr(self, '_m_type_ids') else None
+
+        _pos = self._io.pos()
+        self._io.seek(self.header.type_ids_off)
+        self._debug['_m_type_ids']['start'] = self._io.pos()
+        self._m_type_ids = [None] * (self.header.type_ids_size)
+        for i in range(self.header.type_ids_size):
+            if not 'arr' in self._debug['_m_type_ids']:
+                self._debug['_m_type_ids']['arr'] = []
+            self._debug['_m_type_ids']['arr'].append({'start': self._io.pos()})
+            _t__m_type_ids = self._root.TypeIdItem(self._io, self, self._root)
+            _t__m_type_ids._read()
+            self._m_type_ids[i] = _t__m_type_ids
+            self._debug['_m_type_ids']['arr'][i]['end'] = self._io.pos()
+
+        self._debug['_m_type_ids']['end'] = self._io.pos()
+        self._io.seek(_pos)
+        return self._m_type_ids if hasattr(self, '_m_type_ids') else None
+
+    @property
+    def proto_ids(self):
+        """method prototype identifiers list.
+        
+        These are identifiers for all prototypes referred to by this file.
+        
+        This list must be sorted in return-type (by type_id index) major order,
+        and then by argument list (lexicographic ordering, individual arguments
+        ordered by type_id index). The list must not contain any duplicate entries.
+        """
+        if hasattr(self, '_m_proto_ids'):
+            return self._m_proto_ids if hasattr(self, '_m_proto_ids') else None
+
+        _pos = self._io.pos()
+        self._io.seek(self.header.proto_ids_off)
+        self._debug['_m_proto_ids']['start'] = self._io.pos()
+        self._m_proto_ids = [None] * (self.header.proto_ids_size)
+        for i in range(self.header.proto_ids_size):
+            if not 'arr' in self._debug['_m_proto_ids']:
+                self._debug['_m_proto_ids']['arr'] = []
+            self._debug['_m_proto_ids']['arr'].append({'start': self._io.pos()})
+            _t__m_proto_ids = self._root.ProtoIdItem(self._io, self, self._root)
+            _t__m_proto_ids._read()
+            self._m_proto_ids[i] = _t__m_proto_ids
+            self._debug['_m_proto_ids']['arr'][i]['end'] = self._io.pos()
+
+        self._debug['_m_proto_ids']['end'] = self._io.pos()
+        self._io.seek(_pos)
+        return self._m_proto_ids if hasattr(self, '_m_proto_ids') else None
+
+    @property
+    def field_ids(self):
+        """field identifiers list.
+        
+        These are identifiers for all fields referred to by this file, whether defined in the file or not. 
+        
+        This list must be sorted, where the defining type (by type_id index) 
+        is the major order, field name (by string_id index) is the intermediate 
+        order, and type (by type_id index) is the minor order.
+        
+        The list must not contain any duplicate entries.
+        """
+        if hasattr(self, '_m_field_ids'):
+            return self._m_field_ids if hasattr(self, '_m_field_ids') else None
+
+        _pos = self._io.pos()
+        self._io.seek(self.header.field_ids_off)
+        self._debug['_m_field_ids']['start'] = self._io.pos()
+        self._m_field_ids = [None] * (self.header.field_ids_size)
+        for i in range(self.header.field_ids_size):
+            if not 'arr' in self._debug['_m_field_ids']:
+                self._debug['_m_field_ids']['arr'] = []
+            self._debug['_m_field_ids']['arr'].append({'start': self._io.pos()})
+            _t__m_field_ids = self._root.FieldIdItem(self._io, self, self._root)
+            _t__m_field_ids._read()
+            self._m_field_ids[i] = _t__m_field_ids
+            self._debug['_m_field_ids']['arr'][i]['end'] = self._io.pos()
+
+        self._debug['_m_field_ids']['end'] = self._io.pos()
+        self._io.seek(_pos)
+        return self._m_field_ids if hasattr(self, '_m_field_ids') else None
+
+