This page hosts a formal specification of .class file format using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.
All parsing code for Python generated by Kaitai Struct depends on the Python runtime library. You have to install it before you can parse data.
The Python runtime library can be installed from PyPI:
python3 -m pip install kaitaistructParse a local file and get structure in memory:
data = JavaClass.from_file("path/to/local/file.class")
Or parse structure from a bytes:
from kaitaistruct import KaitaiStream, BytesIO
raw = b"\x00\x01\x02..."
data = JavaClass(KaitaiStream(BytesIO(raw)))
After that, one can get various attributes from the structure by invoking getter methods like:
data.magic # => get magic
# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
# type: ignore
import kaitaistruct
from kaitaistruct import KaitaiStruct, KaitaiStream, BytesIO
from enum import IntEnum
if getattr(kaitaistruct, 'API_VERSION', (0, 9)) < (0, 11):
raise Exception("Incompatible Kaitai Struct Python API: 0.11 or later is required, but you have %s" % (kaitaistruct.__version__))
class JavaClass(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-4.html
.. seealso::
Source - https://docs.oracle.com/javase/specs/jls/se6/jls3.pdf
.. seealso::
Source - https://github.com/openjdk/jdk/blob/jdk-21%2B14/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/ClassConstants.java
.. seealso::
Source - https://github.com/openjdk/jdk/blob/jdk-21%2B14/src/java.base/share/native/include/classfile_constants.h.template
.. seealso::
Source - https://github.com/openjdk/jdk/blob/jdk-21%2B14/src/hotspot/share/classfile/classFileParser.cpp
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass, self).__init__(_io)
self._parent = _parent
self._root = _root or self
self._read()
def _read(self):
self.magic = self._io.read_bytes(4)
if not self.magic == b"\xCA\xFE\xBA\xBE":
raise kaitaistruct.ValidationNotEqualError(b"\xCA\xFE\xBA\xBE", self.magic, self._io, u"/seq/0")
self.version_minor = self._io.read_u2be()
self.version_major = self._io.read_u2be()
if not self.version_major >= 43:
raise kaitaistruct.ValidationLessThanError(43, self.version_major, self._io, u"/seq/2")
self.constant_pool_count = self._io.read_u2be()
self.constant_pool = []
for i in range(self.constant_pool_count - 1):
self.constant_pool.append(JavaClass.ConstantPoolEntry((self.constant_pool[i - 1].is_two_entries if i != 0 else False), self._io, self, self._root))
self.access_flags = self._io.read_u2be()
self.this_class = self._io.read_u2be()
self.super_class = self._io.read_u2be()
self.interfaces_count = self._io.read_u2be()
self.interfaces = []
for i in range(self.interfaces_count):
self.interfaces.append(self._io.read_u2be())
self.fields_count = self._io.read_u2be()
self.fields = []
for i in range(self.fields_count):
self.fields.append(JavaClass.FieldInfo(self._io, self, self._root))
self.methods_count = self._io.read_u2be()
self.methods = []
for i in range(self.methods_count):
self.methods.append(JavaClass.MethodInfo(self._io, self, self._root))
self.attributes_count = self._io.read_u2be()
self.attributes = []
for i in range(self.attributes_count):
self.attributes.append(JavaClass.AttributeInfo(self._io, self, self._root))
def _fetch_instances(self):
pass
for i in range(len(self.constant_pool)):
pass
self.constant_pool[i]._fetch_instances()
for i in range(len(self.interfaces)):
pass
for i in range(len(self.fields)):
pass
self.fields[i]._fetch_instances()
for i in range(len(self.methods)):
pass
self.methods[i]._fetch_instances()
for i in range(len(self.attributes)):
pass
self.attributes[i]._fetch_instances()
class AttributeInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.AttributeInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.name_index = self._io.read_u2be()
self.attribute_length = self._io.read_u4be()
_on = self.name_as_str
if _on == u"Code":
pass
self._raw_info = self._io.read_bytes(self.attribute_length)
_io__raw_info = KaitaiStream(BytesIO(self._raw_info))
self.info = JavaClass.AttributeInfo.AttrBodyCode(_io__raw_info, self, self._root)
elif _on == u"Exceptions":
pass
self._raw_info = self._io.read_bytes(self.attribute_length)
_io__raw_info = KaitaiStream(BytesIO(self._raw_info))
self.info = JavaClass.AttributeInfo.AttrBodyExceptions(_io__raw_info, self, self._root)
elif _on == u"LineNumberTable":
pass
self._raw_info = self._io.read_bytes(self.attribute_length)
_io__raw_info = KaitaiStream(BytesIO(self._raw_info))
self.info = JavaClass.AttributeInfo.AttrBodyLineNumberTable(_io__raw_info, self, self._root)
elif _on == u"SourceFile":
pass
self._raw_info = self._io.read_bytes(self.attribute_length)
_io__raw_info = KaitaiStream(BytesIO(self._raw_info))
self.info = JavaClass.AttributeInfo.AttrBodySourceFile(_io__raw_info, self, self._root)
else:
pass
self.info = self._io.read_bytes(self.attribute_length)
def _fetch_instances(self):
pass
_on = self.name_as_str
if _on == u"Code":
pass
self.info._fetch_instances()
elif _on == u"Exceptions":
pass
self.info._fetch_instances()
elif _on == u"LineNumberTable":
pass
self.info._fetch_instances()
elif _on == u"SourceFile":
pass
self.info._fetch_instances()
else:
pass
class AttrBodyCode(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.3
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.AttributeInfo.AttrBodyCode, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.max_stack = self._io.read_u2be()
self.max_locals = self._io.read_u2be()
self.code_length = self._io.read_u4be()
self.code = self._io.read_bytes(self.code_length)
self.exception_table_length = self._io.read_u2be()
self.exception_table = []
for i in range(self.exception_table_length):
self.exception_table.append(JavaClass.AttributeInfo.AttrBodyCode.ExceptionEntry(self._io, self, self._root))
self.attributes_count = self._io.read_u2be()
self.attributes = []
for i in range(self.attributes_count):
self.attributes.append(JavaClass.AttributeInfo(self._io, self, self._root))
def _fetch_instances(self):
pass
for i in range(len(self.exception_table)):
pass
self.exception_table[i]._fetch_instances()
for i in range(len(self.attributes)):
pass
self.attributes[i]._fetch_instances()
class ExceptionEntry(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.3
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.AttributeInfo.AttrBodyCode.ExceptionEntry, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.start_pc = self._io.read_u2be()
self.end_pc = self._io.read_u2be()
self.handler_pc = self._io.read_u2be()
self.catch_type = self._io.read_u2be()
def _fetch_instances(self):
pass
@property
def catch_exception(self):
if hasattr(self, '_m_catch_exception'):
return self._m_catch_exception
if self.catch_type != 0:
pass
self._m_catch_exception = self._root.constant_pool[self.catch_type - 1]
return getattr(self, '_m_catch_exception', None)
class AttrBodyExceptions(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.5
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.AttributeInfo.AttrBodyExceptions, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.number_of_exceptions = self._io.read_u2be()
self.exceptions = []
for i in range(self.number_of_exceptions):
self.exceptions.append(JavaClass.AttributeInfo.AttrBodyExceptions.ExceptionTableEntry(self._io, self, self._root))
def _fetch_instances(self):
pass
for i in range(len(self.exceptions)):
pass
self.exceptions[i]._fetch_instances()
class ExceptionTableEntry(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.AttributeInfo.AttrBodyExceptions.ExceptionTableEntry, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.index = self._io.read_u2be()
def _fetch_instances(self):
pass
@property
def as_info(self):
if hasattr(self, '_m_as_info'):
return self._m_as_info
self._m_as_info = self._root.constant_pool[self.index - 1].cp_info
return getattr(self, '_m_as_info', None)
@property
def name_as_str(self):
if hasattr(self, '_m_name_as_str'):
return self._m_name_as_str
self._m_name_as_str = self.as_info.name_as_str
return getattr(self, '_m_name_as_str', None)
class AttrBodyLineNumberTable(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.12
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.AttributeInfo.AttrBodyLineNumberTable, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.line_number_table_length = self._io.read_u2be()
self.line_number_table = []
for i in range(self.line_number_table_length):
self.line_number_table.append(JavaClass.AttributeInfo.AttrBodyLineNumberTable.LineNumberTableEntry(self._io, self, self._root))
def _fetch_instances(self):
pass
for i in range(len(self.line_number_table)):
pass
self.line_number_table[i]._fetch_instances()
class LineNumberTableEntry(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.AttributeInfo.AttrBodyLineNumberTable.LineNumberTableEntry, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.start_pc = self._io.read_u2be()
self.line_number = self._io.read_u2be()
def _fetch_instances(self):
pass
class AttrBodySourceFile(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.10
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.AttributeInfo.AttrBodySourceFile, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.sourcefile_index = self._io.read_u2be()
def _fetch_instances(self):
pass
@property
def sourcefile_as_str(self):
if hasattr(self, '_m_sourcefile_as_str'):
return self._m_sourcefile_as_str
self._m_sourcefile_as_str = self._root.constant_pool[self.sourcefile_index - 1].cp_info.value
return getattr(self, '_m_sourcefile_as_str', None)
@property
def name_as_str(self):
if hasattr(self, '_m_name_as_str'):
return self._m_name_as_str
self._m_name_as_str = self._root.constant_pool[self.name_index - 1].cp_info.value
return getattr(self, '_m_name_as_str', None)
class ClassCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.1
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.ClassCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.name_index = self._io.read_u2be()
def _fetch_instances(self):
pass
@property
def name_as_info(self):
if hasattr(self, '_m_name_as_info'):
return self._m_name_as_info
self._m_name_as_info = self._root.constant_pool[self.name_index - 1].cp_info
return getattr(self, '_m_name_as_info', None)
@property
def name_as_str(self):
if hasattr(self, '_m_name_as_str'):
return self._m_name_as_str
self._m_name_as_str = self.name_as_info.value
return getattr(self, '_m_name_as_str', None)
class ConstantPoolEntry(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4
"""
class TagEnum(IntEnum):
utf8 = 1
integer = 3
float = 4
long = 5
double = 6
class_type = 7
string = 8
field_ref = 9
method_ref = 10
interface_method_ref = 11
name_and_type = 12
method_handle = 15
method_type = 16
dynamic = 17
invoke_dynamic = 18
module = 19
package = 20
def __init__(self, is_prev_two_entries, _io, _parent=None, _root=None):
super(JavaClass.ConstantPoolEntry, self).__init__(_io)
self._parent = _parent
self._root = _root
self.is_prev_two_entries = is_prev_two_entries
self._read()
def _read(self):
if (not (self.is_prev_two_entries)):
pass
self.tag = KaitaiStream.resolve_enum(JavaClass.ConstantPoolEntry.TagEnum, self._io.read_u1())
if (not (self.is_prev_two_entries)):
pass
_on = self.tag
if _on == JavaClass.ConstantPoolEntry.TagEnum.class_type:
pass
self.cp_info = JavaClass.ClassCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.double:
pass
self.cp_info = JavaClass.DoubleCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.dynamic:
pass
self.cp_info = JavaClass.DynamicCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.field_ref:
pass
self.cp_info = JavaClass.FieldRefCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.float:
pass
self.cp_info = JavaClass.FloatCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.integer:
pass
self.cp_info = JavaClass.IntegerCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.interface_method_ref:
pass
self.cp_info = JavaClass.InterfaceMethodRefCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.invoke_dynamic:
pass
self.cp_info = JavaClass.InvokeDynamicCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.long:
pass
self.cp_info = JavaClass.LongCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.method_handle:
pass
self.cp_info = JavaClass.MethodHandleCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.method_ref:
pass
self.cp_info = JavaClass.MethodRefCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.method_type:
pass
self.cp_info = JavaClass.MethodTypeCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.module:
pass
self.cp_info = JavaClass.ModulePackageCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.name_and_type:
pass
self.cp_info = JavaClass.NameAndTypeCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.package:
pass
self.cp_info = JavaClass.ModulePackageCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.string:
pass
self.cp_info = JavaClass.StringCpInfo(self._io, self, self._root)
elif _on == JavaClass.ConstantPoolEntry.TagEnum.utf8:
pass
self.cp_info = JavaClass.Utf8CpInfo(self._io, self, self._root)
def _fetch_instances(self):
pass
if (not (self.is_prev_two_entries)):
pass
if (not (self.is_prev_two_entries)):
pass
_on = self.tag
if _on == JavaClass.ConstantPoolEntry.TagEnum.class_type:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.double:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.dynamic:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.field_ref:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.float:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.integer:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.interface_method_ref:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.invoke_dynamic:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.long:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.method_handle:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.method_ref:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.method_type:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.module:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.name_and_type:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.package:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.string:
pass
self.cp_info._fetch_instances()
elif _on == JavaClass.ConstantPoolEntry.TagEnum.utf8:
pass
self.cp_info._fetch_instances()
@property
def is_two_entries(self):
if hasattr(self, '_m_is_two_entries'):
return self._m_is_two_entries
self._m_is_two_entries = (False if self.is_prev_two_entries else ((self.tag == JavaClass.ConstantPoolEntry.TagEnum.long) or (self.tag == JavaClass.ConstantPoolEntry.TagEnum.double)) )
return getattr(self, '_m_is_two_entries', None)
class DoubleCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.6
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.DoubleCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.value = self._io.read_f8be()
def _fetch_instances(self):
pass
class DynamicCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-4.html#jvms-4.4.10
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.DynamicCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self._unnamed0 = JavaClass.VersionGuard(55, self._io, self, self._root)
self.bootstrap_method_attr_index = self._io.read_u2be()
self.name_and_type_index = self._io.read_u2be()
def _fetch_instances(self):
pass
self._unnamed0._fetch_instances()
class FieldInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.5
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.FieldInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.access_flags = self._io.read_u2be()
self.name_index = self._io.read_u2be()
self.descriptor_index = self._io.read_u2be()
self.attributes_count = self._io.read_u2be()
self.attributes = []
for i in range(self.attributes_count):
self.attributes.append(JavaClass.AttributeInfo(self._io, self, self._root))
def _fetch_instances(self):
pass
for i in range(len(self.attributes)):
pass
self.attributes[i]._fetch_instances()
@property
def name_as_str(self):
if hasattr(self, '_m_name_as_str'):
return self._m_name_as_str
self._m_name_as_str = self._root.constant_pool[self.name_index - 1].cp_info.value
return getattr(self, '_m_name_as_str', None)
class FieldRefCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.2
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.FieldRefCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.class_index = self._io.read_u2be()
self.name_and_type_index = self._io.read_u2be()
def _fetch_instances(self):
pass
@property
def class_as_info(self):
if hasattr(self, '_m_class_as_info'):
return self._m_class_as_info
self._m_class_as_info = self._root.constant_pool[self.class_index - 1].cp_info
return getattr(self, '_m_class_as_info', None)
@property
def name_and_type_as_info(self):
if hasattr(self, '_m_name_and_type_as_info'):
return self._m_name_and_type_as_info
self._m_name_and_type_as_info = self._root.constant_pool[self.name_and_type_index - 1].cp_info
return getattr(self, '_m_name_and_type_as_info', None)
class FloatCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.5
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.FloatCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.value = self._io.read_f4be()
def _fetch_instances(self):
pass
class IntegerCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.4
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.IntegerCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.value = self._io.read_u4be()
def _fetch_instances(self):
pass
class InterfaceMethodRefCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.2
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.InterfaceMethodRefCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.class_index = self._io.read_u2be()
self.name_and_type_index = self._io.read_u2be()
def _fetch_instances(self):
pass
@property
def class_as_info(self):
if hasattr(self, '_m_class_as_info'):
return self._m_class_as_info
self._m_class_as_info = self._root.constant_pool[self.class_index - 1].cp_info
return getattr(self, '_m_class_as_info', None)
@property
def name_and_type_as_info(self):
if hasattr(self, '_m_name_and_type_as_info'):
return self._m_name_and_type_as_info
self._m_name_and_type_as_info = self._root.constant_pool[self.name_and_type_index - 1].cp_info
return getattr(self, '_m_name_and_type_as_info', None)
class InvokeDynamicCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.10
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.InvokeDynamicCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self._unnamed0 = JavaClass.VersionGuard(51, self._io, self, self._root)
self.bootstrap_method_attr_index = self._io.read_u2be()
self.name_and_type_index = self._io.read_u2be()
def _fetch_instances(self):
pass
self._unnamed0._fetch_instances()
class LongCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.5
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.LongCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.value = self._io.read_u8be()
def _fetch_instances(self):
pass
class MethodHandleCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.8
"""
class ReferenceKindEnum(IntEnum):
get_field = 1
get_static = 2
put_field = 3
put_static = 4
invoke_virtual = 5
invoke_static = 6
invoke_special = 7
new_invoke_special = 8
invoke_interface = 9
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.MethodHandleCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self._unnamed0 = JavaClass.VersionGuard(51, self._io, self, self._root)
self.reference_kind = KaitaiStream.resolve_enum(JavaClass.MethodHandleCpInfo.ReferenceKindEnum, self._io.read_u1())
self.reference_index = self._io.read_u2be()
def _fetch_instances(self):
pass
self._unnamed0._fetch_instances()
class MethodInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.6
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.MethodInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.access_flags = self._io.read_u2be()
self.name_index = self._io.read_u2be()
self.descriptor_index = self._io.read_u2be()
self.attributes_count = self._io.read_u2be()
self.attributes = []
for i in range(self.attributes_count):
self.attributes.append(JavaClass.AttributeInfo(self._io, self, self._root))
def _fetch_instances(self):
pass
for i in range(len(self.attributes)):
pass
self.attributes[i]._fetch_instances()
@property
def name_as_str(self):
if hasattr(self, '_m_name_as_str'):
return self._m_name_as_str
self._m_name_as_str = self._root.constant_pool[self.name_index - 1].cp_info.value
return getattr(self, '_m_name_as_str', None)
class MethodRefCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.2
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.MethodRefCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.class_index = self._io.read_u2be()
self.name_and_type_index = self._io.read_u2be()
def _fetch_instances(self):
pass
@property
def class_as_info(self):
if hasattr(self, '_m_class_as_info'):
return self._m_class_as_info
self._m_class_as_info = self._root.constant_pool[self.class_index - 1].cp_info
return getattr(self, '_m_class_as_info', None)
@property
def name_and_type_as_info(self):
if hasattr(self, '_m_name_and_type_as_info'):
return self._m_name_and_type_as_info
self._m_name_and_type_as_info = self._root.constant_pool[self.name_and_type_index - 1].cp_info
return getattr(self, '_m_name_and_type_as_info', None)
class MethodTypeCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.9
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.MethodTypeCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self._unnamed0 = JavaClass.VersionGuard(51, self._io, self, self._root)
self.descriptor_index = self._io.read_u2be()
def _fetch_instances(self):
pass
self._unnamed0._fetch_instances()
class ModulePackageCpInfo(KaitaiStruct):
"""Project Jigsaw modules introduced in Java 9
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-3.html#jvms-3.16
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-4.html#jvms-4.4.11
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se19/html/jvms-4.html#jvms-4.4.12
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.ModulePackageCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self._unnamed0 = JavaClass.VersionGuard(53, self._io, self, self._root)
self.name_index = self._io.read_u2be()
def _fetch_instances(self):
pass
self._unnamed0._fetch_instances()
@property
def name_as_info(self):
if hasattr(self, '_m_name_as_info'):
return self._m_name_as_info
self._m_name_as_info = self._root.constant_pool[self.name_index - 1].cp_info
return getattr(self, '_m_name_as_info', None)
@property
def name_as_str(self):
if hasattr(self, '_m_name_as_str'):
return self._m_name_as_str
self._m_name_as_str = self.name_as_info.value
return getattr(self, '_m_name_as_str', None)
class NameAndTypeCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.6
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.NameAndTypeCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.name_index = self._io.read_u2be()
self.descriptor_index = self._io.read_u2be()
def _fetch_instances(self):
pass
@property
def descriptor_as_info(self):
if hasattr(self, '_m_descriptor_as_info'):
return self._m_descriptor_as_info
self._m_descriptor_as_info = self._root.constant_pool[self.descriptor_index - 1].cp_info
return getattr(self, '_m_descriptor_as_info', None)
@property
def descriptor_as_str(self):
if hasattr(self, '_m_descriptor_as_str'):
return self._m_descriptor_as_str
self._m_descriptor_as_str = self.descriptor_as_info.value
return getattr(self, '_m_descriptor_as_str', None)
@property
def name_as_info(self):
if hasattr(self, '_m_name_as_info'):
return self._m_name_as_info
self._m_name_as_info = self._root.constant_pool[self.name_index - 1].cp_info
return getattr(self, '_m_name_as_info', None)
@property
def name_as_str(self):
if hasattr(self, '_m_name_as_str'):
return self._m_name_as_str
self._m_name_as_str = self.name_as_info.value
return getattr(self, '_m_name_as_str', None)
class StringCpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.3
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.StringCpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.string_index = self._io.read_u2be()
def _fetch_instances(self):
pass
class Utf8CpInfo(KaitaiStruct):
"""
.. seealso::
Source - https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.7
"""
def __init__(self, _io, _parent=None, _root=None):
super(JavaClass.Utf8CpInfo, self).__init__(_io)
self._parent = _parent
self._root = _root
self._read()
def _read(self):
self.str_len = self._io.read_u2be()
self.value = (self._io.read_bytes(self.str_len)).decode(u"UTF-8")
def _fetch_instances(self):
pass
class VersionGuard(KaitaiStruct):
"""`class` file format version 45.3 (appeared in the very first publicly
known release of Java SE AND JDK 1.0.2, released 23th January 1996) is so
ancient that it's taken for granted. Earlier formats seem to be
undocumented. Changes of `version_minor` don't change `class` format.
Earlier `version_major`s likely belong to Oak programming language, the
proprietary predecessor of Java.
.. seealso::
James Gosling, Bill Joy and Guy Steele. The Java Language Specification. English. Ed. by Lisa Friendly. Addison-Wesley, Aug. 1996, p. 825. ISBN: 0-201-63451-1.
.. seealso::
Frank Yellin and Tim Lindholm. The Java Virtual Machine Specification. English. Ed. by Lisa Friendly. Addison-Wesley, Sept. 1996, p. 475. ISBN: 0-201-63452-X.
"""
def __init__(self, major, _io, _parent=None, _root=None):
super(JavaClass.VersionGuard, self).__init__(_io)
self._parent = _parent
self._root = _root
self.major = major
self._read()
def _read(self):
self._unnamed0 = self._io.read_bytes(0)
_ = self._unnamed0
if not self._root.version_major >= self.major:
raise kaitaistruct.ValidationExprError(self._unnamed0, self._io, u"/types/version_guard/seq/0")
def _fetch_instances(self):
pass