| # Gaudi Framework, version v21r8 |

Home |  | Generated: 17 Mar 2010

# GaudiHandles.py

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    00001 ## explicit list for wildcard imports
    00002 __all__ = [
    00003            "GaudiHandle",
    00004            "PublicToolHandle", "PrivateToolHandle",
    00005            "ServiceHandle",
    00006            "GaudiHandleArray",
    00007            "ServiceHandleArray",
    00008            "PublicToolHandleArray", "PrivateToolHandleArray",
    00009            ]
    00010 __version__ = "$Revision: 1.6 $"
    00011 __doc__ = """The python module holding python bindings to XyzHandles"""
    00012
    00013 from os import linesep
    00014
    00015 class GaudiHandle(object):
    00016     componentType = "Unspecified" # must be overridden by derived class
    00017     isPublic = True               #  can be overridden by derived class
    00018
    00019     def __init__(self,typeAndName):
    00020         object.__init__(self)
    00021         if hasattr(typeAndName,"toStringProperty"):
    00022             # this is a GaudiHandle or equivalent
    00023             typeAndName = typeAndName.toStringProperty()
    00024         if type(typeAndName) != str:
    00025             raise TypeError("Argument to %s must be a string. Got a %s instead" % \
    00026                             ( self.__class__.__name__, type(typeAndName).__name__) )
    00027         self.typeAndName = typeAndName
    00028
    00029     def __repr__(self):
    00030         return "%s(%r)" % (self.__class__.__name__,self.toStringProperty())
    00031
    00032     def __str__(self):
    00033         # FIXME: (Patch #1668) this creates problem with 2.5
    00034         # return "%s:%s" % (self.__class__.__name__, self.toStringProperty())
    00035         return self.toStringProperty()
    00036
    00037     #
    00038     # Several member functions which are the same as Configurables
    00039     #
    00040     def toStringProperty(self):
    00041         return self.typeAndName
    00042
    00043     def getType(self):
    00044         """Get the 'type' part of the \"type/name\" string."""
    00045         slash = self.typeAndName.find('/')
    00046         if slash != -1:
    00047             # includes name. Return part before /
    00048             return self.typeAndName[0:slash]
    00049         else:
    00050             # only type is given, return full string
    00051             return self.typeAndName
    00052
    00053     def getName(self):
    00054         """Get the 'name' part of the \"type/name\" string.
    00055         If only a type is given, this will be returned as the name.
    00056         If the \"type/name\" string is empty, it will return an emtpy string."""
    00057         slash = self.typeAndName.find('/')
    00058         if slash != -1:
    00059             # explicit name. Return part after the /
    00060             return self.typeAndName[slash+1:]
    00061         else:
    00062             # only type is given. return type as default name
    00063             return self.typeAndName
    00064
    00065     def getGaudiHandle(self):
    00066         return self
    00067
    00068     def getFullName(self):
    00069         return self.toStringProperty()
    00070
    00071 class PublicToolHandle(GaudiHandle):
    00072     __slots__ = ()
    00073     componentType = "AlgTool"
    00074     isPublic = True
    00075
    00076     def __init__(self, toolTypeAndName=''):
    00077         GaudiHandle.__init__( self, toolTypeAndName )
    00078
    00079
    00080 class PrivateToolHandle(GaudiHandle):
    00081     __slots__ = ()
    00082     componentType = "AlgTool"
    00083     isPublic = False
    00084
    00085     def __init__(self, toolTypeAndName=''):
    00086         GaudiHandle.__init__( self, toolTypeAndName )
    00087
    00088
    00089 class ServiceHandle(GaudiHandle):
    00090     __slots__ = ()
    00091     componentType = "Service"
    00092     isPublic = True
    00093
    00094     def __init__(self, serviceName=''):
    00095         GaudiHandle.__init__( self, serviceName )
    00096
    00097 #
    00098 # The HandleArrays
    00099 #
    00100 class GaudiHandleArray(list):
    00101     """A list of GaudiHandles. Only handles of one type are allowed, as specified by self.__class__.handleType
    00102     """
    00103     __slots__ = ( 'typesAndNames' )
    00104     handleType = None # must be set by derived class to the handle type
    00105
    00106     def __init__(self,typesAndNames=None):
    00107         if typesAndNames is None: typesAndNames = []
    00108         list.__init__(self)
    00109         # check the type
    00110         if type(typesAndNames) != list:
    00111             raise TypeError("Argument to %s must be a list. Got a %s instead" % \
    00112                             ( self.__class__.__name__, type(typesAndNames).__name__) )
    00113         # add entries to list
    00114         for tn in typesAndNames: self.append( tn )
    00115
    00116     def __repr__(self):
    00117         """Return class name with list of type/name strings as argument"""
    00118         rep = self.__class__.__name__ + '(['
    00119         for h in self:
    00120             rep += repr(h.toStringProperty()) + ','
    00121         # remove last comma
    00122         if rep[-1] == ',': rep = rep[:-1]
    00123         return rep + '])'
    00124
    00125     def __str__(self):
    00126         """Print entries, one per line"""
    00127         shortName = self.__class__.__name__
    00128         return "%s:%s" % (shortName, linesep + linesep.join([str(s) for s in self]))
    00129
    00130     def __getitem__(self,index):
    00131         if type(index) == str:
    00132             # seach by instance name
    00133             for h in self:
    00134                 if h.getName() == index:
    00135                     return h
    00136             raise IndexError( "%s does not have a %s with instance name %s" % \
    00137                               (self.__class__.__name__, self.handleType.componentType, index) )
    00138         else:
    00139             return list.__getitem__(self,index)
    00140
    00141     def __delitem__( self, key ):
    00142         super( GaudiHandleArray, self ).__delitem__( self.index(self[key]) )
    00143
    00144     def __iadd__(self,array):
    00145         arrayType = type(array)
    00146         if arrayType == list or arrayType == type(self):
    00147             for v in array:
    00148                 self.append( v )
    00149         else:
    00150             raise TypeError( "Can not add a %s to a %s" % (arrayType.__name__, self.__class__.__name__) )
    00151
    00152         return self
    00153
    00154     def append( self, value ):
    00155         """Only allow appending compatible types. It accepts a string, a handle or a configurable."""
    00156         if type(value) == str:
    00157             # convert string to handle
    00158             value = self.__class__.handleType(value)
    00159         elif type(value) == self.__class__.handleType:
    00160             pass # leave handle as-is
    00161         elif isinstance( value, GaudiHandle ):
    00162             # do not allow different type of handles
    00163             raise TypeError( "Can not add a %s to a %s" % (value.__class__.__name__, self.__class__.__name__) )
    00164         elif value.getGaudiType() != self.__class__.handleType.componentType:
    00165             # assume it is a configurable: allow only correct types
    00166             raise TypeError( "Can not append %s (%s) to a %s" % \
    00167                              (value.__class__.__name__, value.getGaudiType(), self.__class__.__name__) )
    00168         elif hasattr(value,'isPublic'):
    00169             # check public vs private if applicable for this configurable
    00170             pop = value.isPublic() and 'Public' or 'Private'
    00171             if value.isPublic() != self.__class__.handleType.isPublic:
    00172                 raise TypeError( "Can not append %s (%s %s) to a %s" % \
    00173                                  (value.__class__.__name__, pop, value.getGaudiType(), self.__class__.__name__) )
    00174
    00175         # check that an instance name appears only once in the list
    00176         try:
    00177             oldValue = self.__getitem__( value.getName() )
    00178         except IndexError:
    00179             # not yet there, so add it
    00180             list.append( self, value )
    00181         else:
    00182             print "%s    WARNING %r with instance name %r already in list. Not adding %r" % \
    00183                   (self.__class__.__name__, oldValue, oldValue.getName(), value)
    00184
    00185
    00186     def isPublic(self):
    00187         return self.__class__.handleType.isPublic
    00188
    00189     #
    00190     # Member functions which are the same as Configurables
    00191     #
    00192     def toStringProperty(self):
    00193         rep = '['
    00194         # add entries
    00195         for v in self:
    00196             rep += repr( v.toStringProperty() ) + ','
    00197         # remove last comma
    00198         if rep[-1] == ',': rep = rep[:-1]
    00199         return rep + ']'
    00200
    00201     # pickle support
    00202     def __getstate__ (self):
    00203         return { 'typesAndNames' : self.typesAndNames }
    00204
    00205     def __setstate__ ( self, dict ):
    00206         self.typesAndNames = dict[ 'typesAndNames' ]
    00207
    00208
    00209 class ServiceHandleArray(GaudiHandleArray):
    00210     __slots__ = ()
    00211     handleType = ServiceHandle
    00212
    00213     def __init__(self, serviceTypesAndNames=None):
    00214         GaudiHandleArray.__init__( self, serviceTypesAndNames )
    00215
    00216 class PublicToolHandleArray(GaudiHandleArray):
    00217     __slots__ = ()
    00218     handleType = PublicToolHandle
    00219
    00220     def __init__(self, toolTypesAndNames=None):
    00221         GaudiHandleArray.__init__( self, toolTypesAndNames )
    00222
    00223
    00224 class PrivateToolHandleArray(GaudiHandleArray):
    00225     __slots__ = ()
    00226     handleType = PrivateToolHandle
    00227
    00228     def __init__(self, toolTypesAndNames=None):
    00229         GaudiHandleArray.__init__( self, toolTypesAndNames )