#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Copyright 2014 California Institute of Technology. ALL RIGHTS RESERVED.
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
# http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# 
# United States Government Sponsorship acknowledged. This software is subject to
# U.S. export control laws and regulations and has been classified as 'EAR99 NLR'
# (No [Export] License Required except when exporting to an embargoed country,
# end user, or in support of a prohibited end use). By downloading this software,
# the user agrees to comply with all applicable U.S. export laws and regulations.
# The user has the responsibility to obtain export licenses, or other export
# authority as may be required before exporting this software to any 'EAR99'
# embargoed foreign country or citizen of those countries.
#
# Author: Eric Belz
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~




"""eRdf Experimental RDF stuff- no warranty"""
## \namespace rdf.eRDF __e__ xperimental RDF objects



## A generic base class for RDF wrapped data structures -clients should
## use this when they have an object with RDF dependency injection and then
## further behavior as defined by the sub-classes methods.
class RDFWrapper(object):
    """RDFWrapper(rdf instance):

    is a base class for classes that wrap rdf instances.
    """
    
    ## Initialized with an RDF instance
    ## \param rdf_ a bonafide rdf.data.files.RDF object
    def __init__(self, rdf_):
        ## The wrapped rdf 
        self._rdf = rdf_
        return None
    
    ## self.rdf == self.rdf() == self._rdf
    @property
    def rdf(self):
        return self._rdf

    ## Access rdf dictionary
    def __getitem__(self, key):
        return self._rdf.__getitem__(self, key)
    
    ## Access rdf dictionary
    def __setitem__(self, key, field):
        return self._rdf.__setitem__(self, key, field)
    
    ## Access rdf dictionary
    def __delitem__(self, key):
        return self._rdf.__delitem__(self, key)
    
    ## Access rdf dictionary
    def __len__(self, key):
        return len(self._rdf)
    
    
    
## Experimental function to factor keys and rdf.
def factor(rdf_):
    _k = rdf_.keys()
    _k.sort()
    k = _k[:]
    longest = max(map(len, k))
    import numpy as np
    m = np.zeros( (len(k), 27 ), dtype=int )
    for jdx, key in enumerate(k):
        for idx, cc in enumerate(key):
            m[jdx, idx] = ord(cc)
    base = [2**__ for __ in map(long, range(len(m[0])))]