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#
# Copyright Red Hat
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
#
"""
LabeledValue - A sampled statistic with a label. Used for formatting stats
output.
$Id: //eng/vdo-releases/aluminum/src/python/vdo/statistics/LabeledValue.py#2 $
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
class LabeledValue(object):
"""
An object which represents a labeled statistic value or a labeled collection
of other LabeledValues.
"""
@staticmethod
def make(label, value):
"""
Create a new labeled value.
:param label: The label
:param value: The value
:return: The new labeled value. If the supplied value is a list, the
returned object will be a LabeledValueList, otherwise it
will be a LabeledValue.
"""
if isinstance(value, list):
return LabeledValueList(label, value)
return LabeledValue(label, value)
def __init__(self, label, value):
"""
Create a new labeled value.
:param label: The label
:param value: The value
"""
self.label = label
self.value = value
def isMultiValued(self):
"""
Check whether this is a collection or a single value.
:return: True if this is a collection of values
"""
return False
def width(self):
"""
Get the width of the label for this value.
:return: The width of the label
"""
return len(self.label)
def subWidth(self, hierarchical):
"""
Get the maximum width of the labels of this value and/or all of
its sub-values.
:param hierarchical: Whether the format mode is hierarchical or not
:return: The width of this value or its immediate sub-values if
hierarchical, otherwise, the width of this value or its full tree
of sub-values.
"""
return self.width()
def hasSubValue(self, index):
"""
Check whether this value has a subvalue for the given index.
:param index: The index into the subvalue list to check
:return: True if the indexed subvalue exists
"""
return False
def format(self, displaySpec=None, joiner=None):
"""
Format this value and any of its children.
:param displaySpec: The display specification
:param joiner: The string for joining subvalues
"""
if isinstance(self.value, bytes):
return self.value.decode("ASCII")
return str(self.value)
class LabeledValueList(LabeledValue):
"""
An object representing a labeled collection of labeled values.
"""
def subWidth(self, hierarchical):
"""
:inherit:
"""
if (hierarchical):
return max(v.width() for v in self.value)
return max(v.subWidth(False) for v in self.value)
def isMultiValued(self):
"""
:inherit:
"""
return True
def hasSubValue(self, index):
"""
:inherit:
"""
try:
return (self.value[index].format() != '')
except IndexError:
return False
def format(self, displaySpec, joiner):
"""
:inherit:
"""
return joiner.join(filter(None,
[displaySpec.format(lv) for lv in self.value]))
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