In This Package:

iStatsSvc.py

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#!/usr/bin/env python
#
# DayaBay wrapper class for IStatisticsSvc
#
# dandwyer@caltech.edu  2009-05-28

# Wrapper class for IStatisticSvc
class iStatsSvc:
    "Python Interface to IStatisticsSvc"
    _statsSvc = None   # Reference to IStatisticsSvc
    def __init__(self, alg, path = ""):
        self.alg = alg # Reference to the algorithm which created this handle
        self.defaultPath = path   # Default path for this algorithm
        self.data = {}  # Shortcuts to items in StatisticsSvc for this alg
        return

    def isInitialized(self):
        if self.__class__._statsSvc == None:
            return False
        return True

    def initialize(self):
        if not self.isInitialized():
            statsSvc = self.alg.svc("IStatisticsSvc","StatisticsSvc")
            if statsSvc == None:
                self.alg.error("Failed to initialize statistics service")
            else:
                # Initialize for all instances of iStatsSvc
                self.__class__._statsSvc = statsSvc
        return
    
    def _key2path(self,key):
        if key[0] != '/': 
            key = self.defaultPath + '/' + key
        return key

    def __setitem__(self,key,value):
        self.alg.debug('iStatsSvc.__setitem__(%s,%s)'%(key,value))
        if not self.isInitialized(): self.initialize() 
        key = self._key2path(key)
        if self.data.has_key(key):
            raise KeyError, 'key "%s" already set'%key
        self.__class__._statsSvc.put(key,value)
        self.data[key] = value
        return

    def __getitem__(self,key):
        self.alg.debug('iStatsSvc.__getitem__(%s)'%(key))
        if not self.isInitialized(): self.initialize()
        key = self._key2path(key)
        if self.data.has_key(key):
            return self.data[self._key2path(key)]
        return self.__class__._statsSvc.get(key)

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