324 lines
12 KiB
Python
324 lines
12 KiB
Python
"""SCons.Tool.JavaCommon
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Stuff for processing Java.
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"""
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#
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# Copyright (c) 2001 - 2015 The SCons Foundation
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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__revision__ = "src/engine/SCons/Tool/JavaCommon.py rel_2.4.1:3453:73fefd3ea0b0 2015/11/09 03:25:05 bdbaddog"
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import os
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import os.path
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import re
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java_parsing = 1
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default_java_version = '1.4'
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if java_parsing:
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# Parse Java files for class names.
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#
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# This is a really cool parser from Charles Crain
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# that finds appropriate class names in Java source.
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# A regular expression that will find, in a java file:
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# newlines;
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# double-backslashes;
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# a single-line comment "//";
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# single or double quotes preceeded by a backslash;
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# single quotes, double quotes, open or close braces, semi-colons,
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# periods, open or close parentheses;
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# floating-point numbers;
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# any alphanumeric token (keyword, class name, specifier);
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# any alphanumeric token surrounded by angle brackets (generics);
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# the multi-line comment begin and end tokens /* and */;
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# array declarations "[]".
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_reToken = re.compile(r'(\n|\\\\|//|\\[\'"]|[\'"\{\}\;\.\(\)]|' +
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r'\d*\.\d*|[A-Za-z_][\w\$\.]*|<[A-Za-z_]\w+>|' +
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r'/\*|\*/|\[\])')
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class OuterState(object):
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"""The initial state for parsing a Java file for classes,
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interfaces, and anonymous inner classes."""
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def __init__(self, version=default_java_version):
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if not version in ('1.1', '1.2', '1.3','1.4', '1.5', '1.6', '1.7',
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'1.8', '5', '6'):
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msg = "Java version %s not supported" % version
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raise NotImplementedError(msg)
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self.version = version
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self.listClasses = []
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self.listOutputs = []
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self.stackBrackets = []
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self.brackets = 0
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self.nextAnon = 1
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self.localClasses = []
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self.stackAnonClassBrackets = []
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self.anonStacksStack = [[0]]
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self.package = None
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def trace(self):
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pass
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def __getClassState(self):
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try:
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return self.classState
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except AttributeError:
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ret = ClassState(self)
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self.classState = ret
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return ret
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def __getPackageState(self):
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try:
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return self.packageState
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except AttributeError:
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ret = PackageState(self)
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self.packageState = ret
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return ret
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def __getAnonClassState(self):
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try:
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return self.anonState
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except AttributeError:
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self.outer_state = self
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ret = SkipState(1, AnonClassState(self))
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self.anonState = ret
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return ret
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def __getSkipState(self):
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try:
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return self.skipState
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except AttributeError:
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ret = SkipState(1, self)
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self.skipState = ret
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return ret
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def __getAnonStack(self):
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return self.anonStacksStack[-1]
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def openBracket(self):
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self.brackets = self.brackets + 1
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def closeBracket(self):
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self.brackets = self.brackets - 1
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if len(self.stackBrackets) and \
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self.brackets == self.stackBrackets[-1]:
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self.listOutputs.append('$'.join(self.listClasses))
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self.localClasses.pop()
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self.listClasses.pop()
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self.anonStacksStack.pop()
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self.stackBrackets.pop()
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if len(self.stackAnonClassBrackets) and \
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self.brackets == self.stackAnonClassBrackets[-1]:
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self.__getAnonStack().pop()
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self.stackAnonClassBrackets.pop()
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def parseToken(self, token):
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if token[:2] == '//':
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return IgnoreState('\n', self)
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elif token == '/*':
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return IgnoreState('*/', self)
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elif token == '{':
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self.openBracket()
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elif token == '}':
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self.closeBracket()
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elif token in [ '"', "'" ]:
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return IgnoreState(token, self)
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elif token == "new":
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# anonymous inner class
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if len(self.listClasses) > 0:
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return self.__getAnonClassState()
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return self.__getSkipState() # Skip the class name
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elif token in ['class', 'interface', 'enum']:
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if len(self.listClasses) == 0:
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self.nextAnon = 1
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self.stackBrackets.append(self.brackets)
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return self.__getClassState()
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elif token == 'package':
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return self.__getPackageState()
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elif token == '.':
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# Skip the attribute, it might be named "class", in which
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# case we don't want to treat the following token as
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# an inner class name...
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return self.__getSkipState()
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return self
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def addAnonClass(self):
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"""Add an anonymous inner class"""
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if self.version in ('1.1', '1.2', '1.3', '1.4'):
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clazz = self.listClasses[0]
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self.listOutputs.append('%s$%d' % (clazz, self.nextAnon))
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elif self.version in ('1.5', '1.6', '1.7', '1.8', '5', '6'):
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self.stackAnonClassBrackets.append(self.brackets)
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className = []
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className.extend(self.listClasses)
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self.__getAnonStack()[-1] = self.__getAnonStack()[-1] + 1
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for anon in self.__getAnonStack():
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className.append(str(anon))
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self.listOutputs.append('$'.join(className))
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self.nextAnon = self.nextAnon + 1
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self.__getAnonStack().append(0)
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def setPackage(self, package):
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self.package = package
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class AnonClassState(object):
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"""A state that looks for anonymous inner classes."""
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def __init__(self, old_state):
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# outer_state is always an instance of OuterState
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self.outer_state = old_state.outer_state
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self.old_state = old_state
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self.brace_level = 0
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def parseToken(self, token):
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# This is an anonymous class if and only if the next
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# non-whitespace token is a bracket. Everything between
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# braces should be parsed as normal java code.
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if token[:2] == '//':
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return IgnoreState('\n', self)
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elif token == '/*':
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return IgnoreState('*/', self)
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elif token == '\n':
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return self
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elif token[0] == '<' and token[-1] == '>':
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return self
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elif token == '(':
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self.brace_level = self.brace_level + 1
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return self
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if self.brace_level > 0:
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if token == 'new':
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# look further for anonymous inner class
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return SkipState(1, AnonClassState(self))
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elif token in [ '"', "'" ]:
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return IgnoreState(token, self)
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elif token == ')':
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self.brace_level = self.brace_level - 1
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return self
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if token == '{':
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self.outer_state.addAnonClass()
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return self.old_state.parseToken(token)
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class SkipState(object):
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"""A state that will skip a specified number of tokens before
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reverting to the previous state."""
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def __init__(self, tokens_to_skip, old_state):
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self.tokens_to_skip = tokens_to_skip
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self.old_state = old_state
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def parseToken(self, token):
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self.tokens_to_skip = self.tokens_to_skip - 1
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if self.tokens_to_skip < 1:
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return self.old_state
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return self
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class ClassState(object):
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"""A state we go into when we hit a class or interface keyword."""
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def __init__(self, outer_state):
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# outer_state is always an instance of OuterState
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self.outer_state = outer_state
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def parseToken(self, token):
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# the next non-whitespace token should be the name of the class
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if token == '\n':
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return self
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# If that's an inner class which is declared in a method, it
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# requires an index prepended to the class-name, e.g.
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# 'Foo$1Inner'
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# http://scons.tigris.org/issues/show_bug.cgi?id=2087
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if self.outer_state.localClasses and \
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self.outer_state.stackBrackets[-1] > \
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self.outer_state.stackBrackets[-2]+1:
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locals = self.outer_state.localClasses[-1]
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try:
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idx = locals[token]
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locals[token] = locals[token]+1
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except KeyError:
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locals[token] = 1
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token = str(locals[token]) + token
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self.outer_state.localClasses.append({})
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self.outer_state.listClasses.append(token)
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self.outer_state.anonStacksStack.append([0])
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return self.outer_state
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class IgnoreState(object):
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"""A state that will ignore all tokens until it gets to a
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specified token."""
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def __init__(self, ignore_until, old_state):
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self.ignore_until = ignore_until
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self.old_state = old_state
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def parseToken(self, token):
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if self.ignore_until == token:
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return self.old_state
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return self
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class PackageState(object):
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"""The state we enter when we encounter the package keyword.
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We assume the next token will be the package name."""
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def __init__(self, outer_state):
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# outer_state is always an instance of OuterState
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self.outer_state = outer_state
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def parseToken(self, token):
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self.outer_state.setPackage(token)
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return self.outer_state
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def parse_java_file(fn, version=default_java_version):
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return parse_java(open(fn, 'r').read(), version)
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def parse_java(contents, version=default_java_version, trace=None):
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"""Parse a .java file and return a double of package directory,
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plus a list of .class files that compiling that .java file will
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produce"""
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package = None
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initial = OuterState(version)
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currstate = initial
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for token in _reToken.findall(contents):
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# The regex produces a bunch of groups, but only one will
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# have anything in it.
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currstate = currstate.parseToken(token)
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if trace: trace(token, currstate)
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if initial.package:
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package = initial.package.replace('.', os.sep)
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return (package, initial.listOutputs)
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else:
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# Don't actually parse Java files for class names.
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#
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# We might make this a configurable option in the future if
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# Java-file parsing takes too long (although it shouldn't relative
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# to how long the Java compiler itself seems to take...).
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def parse_java_file(fn):
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""" "Parse" a .java file.
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This actually just splits the file name, so the assumption here
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is that the file name matches the public class name, and that
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the path to the file is the same as the package name.
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"""
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return os.path.split(file)
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# Local Variables:
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# tab-width:4
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# indent-tabs-mode:nil
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# End:
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# vim: set expandtab tabstop=4 shiftwidth=4:
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