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"""
Copyright 2012 NetApp, Inc. All Rights Reserved,
contribution by Weston Andros Adamson <dros@netapp.com>
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
"""
from .config import *
SELECTOR_ORDER=(
'workload',
'kernel',
'mountopt',
'detect',
'tag',
'client',
'server',
'path',
)
_valid_things = set(SELECTOR_ORDER)
def _fmt(name, x, default=None, short=True, sep=' '):
if isinstance(x, (list, tuple)):
return sep.join([ _fmt(name, y) for y in x ])
return x
class Selector(object):
""" This class is used to specify selection of the current query
"""
def __init__(self, *args):
things = []
if len(args) == 0:
# make all empty args
args = [ [] for i in range(len(SELECTOR_ORDER)) ]
assert len(args) == len(SELECTOR_ORDER)
for idx, name in enumerate(SELECTOR_ORDER):
obj = args[idx]
if not isinstance(obj, (list, tuple)):
obj = [obj]
setattr(self, name + 's', tuple(obj))
def __str__(self):
out = []
for name in SELECTOR_ORDER:
obj = getattr(self, name + 's')
out.append('%s%s: %s' % (name, pluralize(len(obj)), ', '.join(obj)))
return ', '.join(out)
def __hash__(self):
args = []
for name in SELECTOR_ORDER:
obj = getattr(self, name + 's')
assert len(obj) == 1, \
"Can't hash selector with %s length != 1 - %r" % (name, obj)
args.append(obj)
return hash(tuple(args))
def __eq__(self, other):
for name in SELECTOR_ORDER:
if getattr(self, name + 's') != getattr(other, name + 's'):
return False
return True
def __lt__(self, other):
return NotImplemented
def __le__(self, other):
return NotImplemented
def __gt__(self, other):
return NotImplemented
def __ge__(self, other):
return NotImplemented
def match_order(self, other, order):
for name in order:
if getattr(self, name + 's') != getattr(other, name + 's'):
return False
return True
def __repr__(self):
args = []
for name in SELECTOR_ORDER:
obj = getattr(self, name + 's')
args.append(obj)
return 'Selector(%s)' % (', '.join([repr(x) for x in args]),)
def __getattr__(self, attr):
superself = super(Selector, self)
if attr in SELECTOR_ORDER:
obj = getattr(self, attr + 's')
assert len(obj) == 1, "%s is not singular" % attr
return obj[0]
elif hasattr(superself, attr):
return getattr(superself, attr)
else:
raise AttributeError("invalid attribute: %r" % attr)
def __add__(self, other):
new = Selector()
for name in SELECTOR_ORDER:
vals = set(getattr(self, name + 's'))
for x in getattr(other, name + 's'):
vals.add(x)
setattr(new, name + 's', list(vals))
return new
def html(self):
out = []
for name in SELECTOR_ORDER:
obj = getattr(self, name + 's')
out.append('%s%s: %s' % (name, pluralize(len(obj)), ', '.join(obj)))
return '<br>'.join(out)
def is_valid_key(self):
for name in SELECTOR_ORDER:
obj = getattr(self, name + 's')
if len(obj) != 1:
return False
return True
def _foreach_thing(self, thing):
if isinstance(thing, (list, tuple)):
thing = list(thing)
more_things = thing[1:]
thing = thing[0]
else:
assert thing in _valid_things
more_things = []
for x in getattr(self, thing + 's'):
args = []
for name in SELECTOR_ORDER:
if name == thing:
obj = x
else:
obj = getattr(self, name + 's')
args.append(obj)
sel = Selector(*args)
if more_things:
for y in sel._foreach_thing(more_things):
yield y
else:
yield sel
def foreach(self, thing=None):
if thing == None:
thing = SELECTOR_ORDER
for x in self._foreach_thing(thing):
yield x
def fmt(self, thing, short=True, title=False):
x = getattr(self, thing + 's')
return _fmt(thing, x, default = lambda x : ' '.join(x), short=short)
def title(self, thing):
x = getattr(self, thing + 's')
return "%s%s" % (thing, pluralize(len(obj)))
def display_info(self, all_selector, show_all=False, sep=' ',
pre='', post=''):
display_info = []
for name in SELECTOR_ORDER:
obj = getattr(self, name + 's')
all_obj = getattr(all_selector, name + 's')
if show_all or obj != all_obj:
pl = pluralize(len(obj))
entry = ('%s%s' % (name, pl),
pre + str(_fmt(name, obj, sep=sep)) + post)
display_info.append(entry)
return display_info
def contains(self, other):
for name in SELECTOR_ORDER:
this = set(getattr(self, name + 's'))
other_list = getattr(other, name + 's')
# make sure each element of other is in self
for o in other_list:
if not o in this:
return False
return True
def merge_selectors(selectors):
total = Selector()
for s in selectors:
total += s
return total
def filter_groups(groups, selector):
return [ g for g in groups if selector.contains(g) ]
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