Extracting full method declarations and fieldnames

[pjcuser]

All the previous question ask to extract method + its body as a text.

I want to know given a .java source, how can I extract method declarations which means:

• Modifiers
• Return type
• Function name
• Function arguments/parameters

as a python list.

PS: I don't need method's body.

Can the same be done for fields in class as well?

Is it possible with javalang?

[cryptax]

Yes, it's possible, but you'll have to do some work yourself to make the list the way you want it.

• list all methods with tree.filter(javalang.tree.MethodDeclaration)
• for each method, its function name is name field
• modifier is modifiers
• arguments: they will be listed in parameters field. Then, you need to retrieve the type and name of the parameter.
• return value is return_type field. Get the type name with name.

This is an example of very simple method:

MethodDeclaration(annotations=[], body=[ReturnStatement(expression=This(postfix_operators=[], prefix_operators=[], qualifier=None, selectors=[MemberReference(member=msg, postfix_operators=None, prefix_operators=None, qualifier=None, selectors=None)]), label=None)], documentation=None, modifiers={'public'}, name=getMessage, parameters=[], return_type=ReferenceType(arguments=None, dimensions=[], name=String, sub_type=None), throws=None, type_parameters=None)

[faysalhossain2007]

how can I get the body from this ? I tried the following code, but nothing works:

for path, node in tree.filter(javalang.tree.MethodDeclaration):
     print(node['body'])

for path, node in tree.filter(javalang.tree.MethodDeclaration):
     print(node[1])

EDIT: I am able to access it using node.body