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# coding: UTF-8
# Copyright 2009, 2010 Thomas Jourdan
#
# 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 3 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 St, Fifth Floor, Boston, MA 02110-1301 USA
import random
import ka_debug
import model_random
import ka_extensionpoint
import model_constraintpool
import model_locus
import model_allele
BUZZWORD_CONSTRAINTS = 'buzzwordconstraint'
class Buzzword(model_allele.Allele):
"""Buzzword
inv: len(self.wordlist) > 0
"""
cdef = [{'bind' : BUZZWORD_CONSTRAINTS,
'name' : 'Buzzwords',
'domain': model_constraintpool.STRING_1_OF_N,
'enum' : ka_extensionpoint.list_extensions(BUZZWORD_CONSTRAINTS)
},
]
def __init__(self, trunk, words):
"""Buzzword constructor
pre: len(words) > 0
"""
super(Buzzword, self).__init__(trunk)
cpool = model_constraintpool.ConstraintPool.get_pool()
constraint_name = cpool.get(self, BUZZWORD_CONSTRAINTS)[0]
self.constraint = ka_extensionpoint.create(constraint_name, self.path)
self.wordlist = words
def dot(self):
result = ""
anchor = ka_debug.dot_id(self) + ' -> '
for ref in self.wordlist:
result += ka_debug.dot_ref(anchor, ref)
return result
def __eq__(self, other):
"""Equality based on list of strings."""
equal = isinstance(other, Buzzword) \
and len(self.wordlist) == len(other.wordlist)
if equal:
for index, word in enumerate(self.wordlist):
equal = equal and word == other.wordlist[index]
return equal
# def __ne__(self, other):
# return not self.__eq__(other)
#
# def __hash__(self):
# raise TypeError("Genome objects are unhashable")
def randomize(self):
"""Create a random word list.
Result is a subset of the word list from
extension point 'ep_buzzwordconstraint'.
"""
cpool = model_constraintpool.ConstraintPool.get_pool()
constraints = cpool.get(self, BUZZWORD_CONSTRAINTS)
self.constraint = ka_extensionpoint.create(random.choice(constraints),
self.path)
full_wordlist = self.constraint.get_wordlist()
approximate_count = random.randint(1, len(full_wordlist)-1)
self.wordlist = []
self.wordlist.append(random.choice(full_wordlist))
for dummy in range(approximate_count):
candidate = random.choice(full_wordlist)
if candidate not in self.wordlist:
self.wordlist.append(candidate)
def mutate(self):
"""Mutate word list.
"""
full_wordlist = self.constraint.get_wordlist()
# change a word
if model_random.is_mutating():
candidate = random.choice(full_wordlist)
if candidate not in self.wordlist:
self.wordlist[random.randint(0, len(self.wordlist)-1)] = \
candidate
# change number of words
if model_random.is_mutating():
new_count = len(self.wordlist) + random.randint(-1, 1)
if new_count > len(self.wordlist):
# append one
self.wordlist.insert(random.randint(0, len(self.wordlist)-1), \
random.choice(full_wordlist))
elif new_count < len(self.wordlist) and len(self.wordlist) >= 2:
#remove one
del self.wordlist[random.randint(0, len(self.wordlist)-1)]
def swap_places(self):
"""Exchange position of buzzwords in word list"""
model_random.swap_places(self.wordlist)
def crossingover(self, other):
"""Merges both word lists and returns a copy of Buzzword.
pre: isinstance(other, Buzzword)
# check for distinct references, needs to copy content, not references
post: __return__ is not self
post: __return__ is not other
post: model_locus.unique_check(__return__, self, other) == ''
"""
new_one = Buzzword(self.get_trunk(), [''])
new_one.wordlist = model_random.crossingover_str_list(self.wordlist,
other.wordlist)
return new_one
def copy(self):
"""A word list copy constructor.
post: isinstance(__return__, Buzzword)
# check for distinct references, needs to copy content, not references
post: __return__ is not self
"""
new_one = Buzzword(self.get_trunk(), [''])
new_one.wordlist = []
for word in self.wordlist:
new_one.wordlist.append(word[:])
new_one.constraint = self.constraint
return new_one
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