1 files changed, 61 insertions, 0 deletions
diff --git a/java_config/versionator.py b/java_config/versionator.py
new file mode 100644
index 0000000..b5ced4b
--- /dev/null
+++ b/java_config/versionator.py
@@ -0,0 +1,61 @@
+# -*- coding: UTF-8 -*-
+
+# Copyright 2005 Gentoo Foundation
+# Distributed under the terms of the GNU General Public license v2
+# $Header: $
+
+# Author: Saleem Abdulrasool <compnerd@gentoo.org>
+# Maintainer: Gentoo Java Herd <java@gentoo.org>
+# Python based utilities
+
+# ChangeLog
+# Saleem A. <compnerd@gentoo.org>
+#     March 31, 2005 - Initial Write
+
+import re
+
+class versionator:
+   def __init__(self):
+      self.atom_parser = re.compile(r"(?P<equality>[~!<>=]*)virtual/(?P<environment>jre|jdk)-(?P<version>[0-9\.]+)")
+   
+   def parse_depend(self, atoms):
+      matched_atoms = []
+
+      for atom in atoms.split(','):
+         # Remove whitespace
+         atom = atom.strip()
+
+         # Parse the atom
+         matches = self.atom_parser.findall(atom)
+
+         # Collect only the java atoms
+         if len(matches) is not 0:
+            for i in range(len(matches)):
+               match = matches[i]
+               matched_atoms.append({'equality':match[0], 'item':match[1], 'version':match[2]})
+
+      return matched_atoms
+
+   def version_satisfies(self, atoms, item, version):
+      matched_atoms = parse_depend(atoms)
+
+      for atom in matched_atoms:
+         if atom['item'] == item:
+            if matches(atom['version'], version, atom['equality']):
+               return true
+      return false
+
+   def matches(self, version_a, version_b, operator):
+      version_a = version_a.replace('.')
+      version_b = version_b.replace('.')
+
+      # Fix the not operator to work with our checker
+      if operator = '!':
+         operator = '!='
+
+      if operator.find('!') is -1:
+         return eval(version_a + operator + version_b)
+      else:
+         return !(eval(version_a + operator.replace('!', '') + version_b)) 
+
+      return False