utils.py

OpenWFE是一个开放源码的Java工作流引擎。它是一个完整的业务处理管理套件：一个引擎

#
# Copyright (c) 2005, John Mettraux, OpenWFE.org
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# $Id: utils.py 1931 2005-07-07 07:39:47Z jmettraux $
#

"""

    some useful methods

"""

from types import ListType
from types import StringType



def printLogMethod (message):
    """
        A log method that is just a print...
        This thing could get useful when you have to pass a logMethod,
        but you can have this method as default
    
        def doTheJob (param1, param2, logMethod=printLogMethod)
        ...
        doTheJob(1, 2, service1.ldebug)
    """
    print message


def isString (object):
    """
        Determines if an object is a String.
        This method has two 'versions'. The 2.2 version is disabled for the
        moment (some Zope users are stuck with 2.1)
    """
    #
    # python 2.2 style
    #return isinstance(object, str)
    #
    # python 2.1 style
    #return type(object) == StringType
    #
    return isinstance(object, basestring)


def isList (object):
    """
        Determines if object is of type list.
    """
    if not object: return 0
    return type(object) == ListType


def substitute (map, text):
    """
        Given a map and some text, substitute occurences of '${whateverkey}' 
        with whatevervalue (where whatevervalue is map['whateverkey'])
    """

    #print 'substitute() >%s<' % text

    i = text.find('${')

    if i < 0: return text

    j = text[i+2:].find('}')

    if j < 0: return text

    j = j + (i+2)

    #print 'text[:i] is >%s<' % text[:i]
    #print 'text[i+2:j] is >%s<' % text[i+2:j]
    #print 'text[j+1:] is >%s<' % text[j+1:]

    return "%s%s%s" % \
        (text[:i],
         str(map.get(text[i+2:j])),  
         substitute(context, text[j+1:]))

#text = 'this is ${nada} or ${echo}.'
#print text
#print substitute({'nada': 'surf', 'echo': 'foxtrot'}, text)