parsing java files

[stéphane bard]

hello
i would like to parse java files an detect
class name's, attributes name's type's and visibility (and or list of
methods).

is there any module who can parse easily a java file without using
(jython)?

[Paul Boddie]

stéphane bard wrote:

hello
i would like to parse java files an detect
class name's, attributes name's type's and visibility (and or list of
methods).

is there any module who can parse easily a java file without using
(jython)?

There are probably a number of standard parser solutions which can
expose such information. However, another solution is that provided by
the javaclass package:

import javaclass.class file # http://www.python.org/pypi/javaclass

# Read the contents of the compiled class.

f = open("org/w3c/dom/Element.class", "rb")
s = f.read()
f.close()

# Process the class data.

c = javaclass.class file.ClassFile( s)

# Obtain the internal name of the class.

name = unicode(c.inter faces[0].get_name()) # u'org/w3c/dom/Node'
for m in c.methods:

# Obtain each method name and access details.

method_name = unicode(m.get_n ame()) # eg. u'getTagName'
is_public = m.access_flags & javaclass.class file.PUBLIC

Obviously, this is more convoluted than it needs to be, but the
original purpose of the module employed is to assist in translating
Java class data to other forms - notably Python bytecode - although
such experiments haven't been continued by myself for quite some time.
The class decoding part illustrated above should be quite usable,
however.

Paul

[Gabriel Genellina]

At Thursday 21/9/2006 17:51, stéphane bard wrote:

>i would like to parse java files an detect
class name's, attributes name's type's and visibility (and or list of
methods).

is there any module who can parse easily a java file without using
(jython)?

I would get the needed info using javadoc (in
Java) and then process the output in Python.

Gabriel Genellina
Softlab SRL

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[stéphane bard]

i use javaclass and it's great !!
this is what i need. thank's paul

gabriel thank's too for advice
Paul Boddie a écrit :

stéphane bard wrote:

>hello
i would like to parse java files an detect
class name's, attributes name's type's and visibility (and or list of
methods).

is there any module who can parse easily a java file without using
(jython)?

There are probably a number of standard parser solutions which can
expose such information. However, another solution is that provided by
the javaclass package:

import javaclass.class file # http://www.python.org/pypi/javaclass

# Read the contents of the compiled class.

f = open("org/w3c/dom/Element.class", "rb")
s = f.read()
f.close()

# Process the class data.

c = javaclass.class file.ClassFile( s)

# Obtain the internal name of the class.

name = unicode(c.inter faces[0].get_name()) # u'org/w3c/dom/Node'
for m in c.methods:

# Obtain each method name and access details.

method_name = unicode(m.get_n ame()) # eg. u'getTagName'
is_public = m.access_flags & javaclass.class file.PUBLIC

Obviously, this is more convoluted than it needs to be, but the
original purpose of the module employed is to assist in translating
Java class data to other forms - notably Python bytecode - although
such experiments haven't been continued by myself for quite some time.
The class decoding part illustrated above should be quite usable,
however.

Paul