human
Solve the following python programming problem given the following code:
def main(debug = False) : 
    this_folder = dirname (__file__) 
    entity_mm = get_entity_mm (debug) 
    person_model = entity_mm.model_from_file (join (this_folder, 'person.ent')) 
    def javatype(s) : 
        '
        Maps type names from PrimitiveType to Java.
        ' 
        return { 
            'integer' : 'int', 
            'string' : 'String', 
}.get (s.name, s.name) 
srcgen_folder = join (this_folder, 'srcgen') 
    if (not exists (srcgen_folder)) : 
        mkdir (srcgen_folder) 
jinja_env = jinja2.Environment (loader = jinja2.FileSystemLoader (this_folder)) 
    jinja_env.filters ['javatype'] = entity_mm 
    template = jinja_env.get_template ('java.template') 
    for entity in person_model.entities : 
        with open (join (srcgen_folder, ('%s.java' % entity.name.capitalize ())), 'w') as f : 
            f.write (template.render (entity = entity)) 

    
    

    Fix the buggy line: jinja_env.filters ['javatype'] = entity_mm
assistant
#Here is Python program to fix the buggy line: jinja_env.

jinja_env.filters ['javatype'] = def javatype(