def BuildClassFilesAndHash(jarfile,ignoreDirs = [],ignoreFiles = []):
print 'Building ClassFiles'
zip = zipfile.ZipFile(jarfile)
files = []
for name in zip.namelist():
isokay = True
for x in ignoreDirs:
if name.startswith(x):
isokay = False
break
for x in ignoreFiles:
if name.endswith(x):
isokay = False
break
if isokay == True:
files.append(name)
for name in files:
if name.endswith('.class'):
hasher = hashlib.md5()
t = zip.open(name)
temp = ClassFile(t)
ClassFiles[name.replace(".class","")]=temp
t = zip.open(name)
hasher.update(t.read())
Hashes[name.replace(".class","")]=hasher.hexdigest()
t.close()
elif not name.endswith("/"):
t = zip.open(name)
hasher = hashlib.md5()
hasher.update(t.read())
FingerPrint["other"][name] = hasher.hexdigest()
def read_class(self, classname):
if is_classfile_ext(classname):
raise Exception('Invalid classname "{}" - omit ".class"'.format(classname))
class_names = self.classfiles()
if classname not in class_names:
raise KeyError('{} not found in jar.'.format(classname))
entry_name = format_classfile_ext(classname)
return ClassFile(self.open_zip.open(entry_name, self.mode))
def test_sourcefile_write():
"""
Ensure SourceFileAttribute can be written and read back.
"""
cf_one = ClassFile.create('SourceFileTest')
cf_one.attributes.create(
SourceFileAttribute,
sourcefile=cf_one.constants.create_utf8('SourceFileTest.java')
)
fout = StringIO()
cf_one.save(fout)
fin = StringIO(fout.getvalue())
cf_two = ClassFile(fin)
source_file = cf_two.attributes.find_one(name='SourceFile')
assert(source_file.sourcefile.value == 'SourceFileTest.java')
#!/usr/bin/env python
# -*- coding: utf8 -*-
"""
An example showing how to create a "Hello World" class from scratch.
"""
from jawa import ClassFile
from jawa.assemble import assemble
if __name__ == "__main__":
cf = ClassFile.create("HelloWorld")
main = cf.methods.create("main", "([Ljava/lang/String;)V", code=True)
main.access_flags.acc_static = True
main.code.max_locals = 1
main.code.max_stack = 2
main.code.assemble(
assemble(
[
("getstatic", cf.constants.create_field_ref("java/lang/System", "out", "Ljava/io/PrintStream;")),
("ldc", cf.constants.create_string("Hello World!")),
(
"invokevirtual",
cf.constants.create_method_ref("java/io/PrintStream", "println", "(Ljava/lang/String;)V"),
),
("return",),
]
)
)
with open("HelloWorld.class", "wb") as fout:
"""
An example showing how to create fields on a new class.
"""
from jawa import ClassFile
if __name__ == '__main__':
cf = ClassFile.create('HelloWorld')
# Creating a field from a field name and descriptor
field = cf.fields.create('BeerCount', 'I')
# A convienience shortcut for creating static fields.
field = cf.fields.create_static('HelloWorld', 'Ljava/lang/String;',
cf.constants.create_string('Hello World!'))
with open('HelloWorld.class', 'wb') as fout:
cf.save(fout)
"""
An example showing how to create fields on a new class.
"""
from jawa import ClassFile
if __name__ == '__main__':
cf = ClassFile.create('HelloWorld')
# Creating a field from a field name and descriptor
field = cf.fields.create('BeerCount', 'I')
# A convienience shortcut for creating static fields.
field = cf.fields.create_static(
'HelloWorld',
'Ljava/lang/String;',
cf.constants.create_string('Hello World!')
)
with open('HelloWorld.class', 'wb') as fout:
cf.save(fout)
