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//lib/python2.7/site-packages/redhat_support_lib/utils/filterhelper.py

#
# Copyright (c) 2010 Red Hat, Inc.
#
# 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.
#

from redhat_support_lib.utils.searchhelper import SearchHelper

class FilterHelper(object):
    @staticmethod
    def filter(collection, kwargs={}):
        '''Filters collection based on **kwargs'''
        if len(kwargs) is not 0:
            return SearchHelper.filterResults(collection, kwargs)
        else:
            return collection

@staticmethod
    def getItem(result=[]):
        '''Returns first item in collection if exist, otherwise None'''
        if result is not None and len(result) > 0:
            return result[0]
        else:
            None