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"""SCons.Tool.JavaCommon
Stuff for processing Java.
"""
#
# __COPYRIGHT__
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
import os
import os.path
import re
import string
java_parsing = 1
if java_parsing:
# Parse Java files for class names.
#
# This is a really cool parser from Charles Crain
# that finds appropriate class names in Java source.
# A regular expression that will find, in a java file:
# newlines;
# double-backslashes;
# a single-line comment "//";
# single or double quotes preceeded by a backslash;
# single quotes, double quotes, open or close braces, semi-colons;
# any alphanumeric token (keyword, class name, specifier);
# the multi-line comment begin and end tokens /* and */;
# array declarations "[]";
# semi-colons.
_reToken = re.compile(r'(\n|\\\\|//|\\[\'"]|[\'"\{\}\;]|' +
r'[A-Za-z_][\w\.]*|/\*|\*/|\[\])')
class OuterState:
"""The initial state for parsing a Java file for classes,
interfaces, and anonymous inner classes."""
def __init__(self):
self.listClasses = []
self.listOutputs = []
self.stackBrackets = []
self.brackets = 0
self.nextAnon = 1
self.package = None
def trace(self):
pass
def __getClassState(self):
try:
return self.classState
except AttributeError:
ret = ClassState(self)
self.classState = ret
return ret
def __getPackageState(self):
try:
return self.packageState
except AttributeError:
ret = PackageState(self)
self.packageState = ret
return ret
def __getAnonClassState(self):
try:
return self.anonState
except AttributeError:
ret = SkipState(1, AnonClassState(self))
self.anonState = ret
return ret
def __getSkipState(self):
try:
return self.skipState
except AttributeError:
ret = SkipState(1, self)
self.skipState = ret
return ret
def parseToken(self, token):
if token[:2] == '//':
return IgnoreState('\n', self)
elif token == '/*':
return IgnoreState('*/', self)
elif token == '{':
self.brackets = self.brackets + 1
elif token == '}':
self.brackets = self.brackets - 1
if len(self.stackBrackets) and \
self.brackets == self.stackBrackets[-1]:
self.listOutputs.append(string.join(self.listClasses, '$'))
self.listClasses.pop()
self.stackBrackets.pop()
elif token in [ '"', "'" ]:
return IgnoreState(token, self)
elif token == "new":
# anonymous inner class
if len(self.listClasses) > 0:
return self.__getAnonClassState()
return self.__getSkipState() # Skip the class name
elif token in ['class', 'interface', 'enum']:
if len(self.listClasses) == 0:
self.nextAnon = 1
self.stackBrackets.append(self.brackets)
return self.__getClassState()
elif token == 'package':
return self.__getPackageState()
return self
def addAnonClass(self):
"""Add an anonymous inner class"""
clazz = self.listClasses[0]
self.listOutputs.append('%s$%d' % (clazz, self.nextAnon))
self.brackets = self.brackets + 1
self.nextAnon = self.nextAnon + 1
def setPackage(self, package):
self.package = package
class AnonClassState:
"""A state that looks for anonymous inner classes."""
def __init__(self, outer_state):
# outer_state is always an instance of OuterState
self.outer_state = outer_state
self.tokens_to_find = 2
def parseToken(self, token):
# This is an anonymous class if and only if the next
# non-whitespace token is a bracket
if token == '\n':
return self
if token == '{':
self.outer_state.addAnonClass()
elif token in ['"', "'"]:
return IgnoreState(token, self)
return self.outer_state
class SkipState:
"""A state that will skip a specified number of tokens before
reverting to the previous state."""
def __init__(self, tokens_to_skip, old_state):
self.tokens_to_skip = tokens_to_skip
self.old_state = old_state
def parseToken(self, token):
self.tokens_to_skip = self.tokens_to_skip - 1
if self.tokens_to_skip < 1:
return self.old_state
return self
class ClassState:
"""A state we go into when we hit a class or interface keyword."""
def __init__(self, outer_state):
# outer_state is always an instance of OuterState
self.outer_state = outer_state
def parseToken(self, token):
# the next non-whitespace token should be the name of the class
if token == '\n':
return self
self.outer_state.listClasses.append(token)
return self.outer_state
class IgnoreState:
"""A state that will ignore all tokens until it gets to a
specified token."""
def __init__(self, ignore_until, old_state):
self.ignore_until = ignore_until
self.old_state = old_state
def parseToken(self, token):
if self.ignore_until == token:
return self.old_state
return self
class PackageState:
"""The state we enter when we encounter the package keyword.
We assume the next token will be the package name."""
def __init__(self, outer_state):
# outer_state is always an instance of OuterState
self.outer_state = outer_state
def parseToken(self, token):
self.outer_state.setPackage(token)
return self.outer_state
def parse_java_file(fn):
return parse_java(open(fn, 'r').read())
def parse_java(contents, trace=None):
"""Parse a .java file and return a double of package directory,
plus a list of .class files that compiling that .java file will
produce"""
package = None
initial = OuterState()
currstate = initial
for token in _reToken.findall(contents):
# The regex produces a bunch of groups, but only one will
# have anything in it.
currstate = currstate.parseToken(token)
if trace: trace(token, currstate)
if initial.package:
package = string.replace(initial.package, '.', os.sep)
return (package, initial.listOutputs)
else:
# Don't actually parse Java files for class names.
#
# We might make this a configurable option in the future if
# Java-file parsing takes too long (although it shouldn't relative
# to how long the Java compiler itself seems to take...).
def parse_java_file(fn):
""" "Parse" a .java file.
This actually just splits the file name, so the assumption here
is that the file name matches the public class name, and that
the path to the file is the same as the package name.
"""
return os.path.split(file)
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