Revert of Revert of Remove now obsolete checkdeps copy

tools/checkdeps/java_checker.py

Index: tools/checkdeps/java_checker.py
diff --git a/tools/checkdeps/java_checker.py b/tools/checkdeps/java_checker.py
deleted file mode 100644
index 36e46230f4cd6ee47160fd27cd8555eb31898e98..0000000000000000000000000000000000000000
--- a/tools/checkdeps/java_checker.py
+++ /dev/null
@@ -1,107 +0,0 @@
-# Copyright (c) 2012 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""Checks Java files for illegal imports."""
-
-import codecs
-import os
-import re
-
-import results
-from rules import Rule
-
-
-class JavaChecker(object):
-  """Import checker for Java files.
-
-  The CheckFile method uses real filesystem paths, but Java imports work in
-  terms of package names. To deal with this, we have an extra "prescan" pass
-  that reads all the .java files and builds a mapping of class name -> filepath.
-  In CheckFile, we convert each import statement into a real filepath, and check
-  that against the rules in the DEPS files.
-
-  Note that in Java you can always use classes in the same directory without an
-  explicit import statement, so these imports can't be blocked with DEPS files.
-  But that shouldn't be a problem, because same-package imports are pretty much
-  always correct by definition. (If we find a case where this is *not* correct,
-  it probably means the package is too big and needs to be split up.)
-
-  Properties:
-    _classmap: dict of fully-qualified Java class name -> filepath
-  """
-
-  EXTENSIONS = ['.java']
-
-  def __init__(self, base_directory, verbose):
-    self._base_directory = base_directory
-    self._verbose = verbose
-    self._classmap = {}
-    self._PrescanFiles()
-
-  def _PrescanFiles(self):
-    for root, dirs, files in os.walk(self._base_directory):
-      # Skip unwanted subdirectories. TODO(husky): it would be better to do
-      # this via the skip_child_includes flag in DEPS files. Maybe hoist this
-      # prescan logic into checkdeps.py itself?
-      for d in dirs:
-        # Skip hidden directories.
-        if d.startswith('.'):
-          dirs.remove(d)
-        # Skip the "out" directory, as dealing with generated files is awkward.
-        # We don't want paths like "out/Release/lib.java" in our DEPS files.
-        # TODO(husky): We need some way of determining the "real" path to
-        # a generated file -- i.e., where it would be in source control if
-        # it weren't generated.
-        if d == 'out':
-          dirs.remove(d)
-        # Skip third-party directories.
-        if d in ('third_party', 'ThirdParty'):
-          dirs.remove(d)
-      for f in files:
-        if f.endswith('.java'):
-          self._PrescanFile(os.path.join(root, f))
-
-  def _PrescanFile(self, filepath):
-    if self._verbose:
-      print 'Prescanning: ' + filepath
-    with codecs.open(filepath, encoding='utf-8') as f:
-      short_class_name, _ = os.path.splitext(os.path.basename(filepath))
-      for line in f:
-        for package in re.findall('^package\s+([\w\.]+);', line):
-          full_class_name = package + '.' + short_class_name
-          if full_class_name in self._classmap:
-            print 'WARNING: multiple definitions of %s:' % full_class_name
-            print '    ' + filepath
-            print '    ' + self._classmap[full_class_name]
-            print
-          else:
-            self._classmap[full_class_name] = filepath
-          return
-      print 'WARNING: no package definition found in %s' % filepath
-
-  def CheckFile(self, rules, filepath):
-    if self._verbose:
-      print 'Checking: ' + filepath
-
-    dependee_status = results.DependeeStatus(filepath)
-    with codecs.open(filepath, encoding='utf-8') as f:
-      for line in f:
-        for clazz in re.findall('^import\s+(?:static\s+)?([\w\.]+)\s*;', line):
-          if clazz not in self._classmap:
-            # Importing a class from outside the Chromium tree. That's fine --
-            # it's probably a Java or Android system class.
-            continue
-          include_path = os.path.relpath(
-              self._classmap[clazz], self._base_directory)
-          # Convert Windows paths to Unix style, as used in DEPS files.
-          include_path = include_path.replace(os.path.sep, '/')
-          rule = rules.RuleApplyingTo(include_path, filepath)
-          if rule.allow == Rule.DISALLOW:
-            dependee_status.AddViolation(
-                results.DependencyViolation(include_path, rule, rules))
-        if '{' in line:
-          # This is code, so we're finished reading imports for this file.
-          break
-
-    return dependee_status