alias_filter.py

import os, sys, codecs

all_aliases = []
pattern = re.compile(r'[a-zA-Z_]+\$+[a-zA-Z_]+\$+[a-zA-Z_]+\$+[a-zA-Z_]+|[a-zA-Z_]+\$+[a-zA-Z_]+\$+[a-zA-Z_]+|[a-zA-Z_]+\$+[a-zA-Z_]+')
walk_dir = os.path.abspath('/caminho/para/o/diretorio/')

for root, subdirs, files in os.walk(walk_dir):
    [all_aliases.extend(pattern.findall(" ".join( open(os.path.join(root, filename) ).readlines()))) for filename in files if filename.endswith("DAOOracle.java")]

plus_30_aliases = [alias for alias in all_aliases if len(alias) > 30]

alias_filter_prefixed.py

import os, sys, codecs

all_aliases = []
pattern = re.compile(r'[a-zA-Z_]+\$+[a-zA-Z_]+\$+[a-zA-Z_]+\$+[a-zA-Z_]+|[a-zA-Z_]+\$+[a-zA-Z_]+\$+[a-zA-Z_]+|[a-zA-Z_]+\$+[a-zA-Z_]+')
walk_dir = os.path.abspath('/caminho/para/o/diretorio/')

for root, subdirs, files in os.walk(walk_dir):
    [all_aliases.extend([filename+":"+a for a in pattern.findall(" ".join(open(os.path.join(root, filename)).readlines()))]) for filename in files if filename.endswith("DAOOracle.java")]

plus_30_aliases = [alias for alias in all_aliases if len(alias.split(":")[1]) > 30]