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Part21.py
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# Copyright (c) 2011, Thomas Paviot (tpaviot@gmail.com)
# All rights reserved.
# This file is part of the StepClassLibrary (SCL).
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# Neither the name of the <ORGANIZATION> nor the names of its contributors may
# be used to endorse or promote products derived from this software without
# specific prior written permission.
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.
# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import re
import Utils
INSTANCE_DEFINITION_RE = re.compile("#(\d+)[^\S\n]?=[^\S\n]?(.*?)\((.*)\)[^\S\n]?;[\\r]?$")
def map_string_to_num(stri):
""" Take a string, check wether it is an integer, a float or not
"""
if ('.' in stri) or ('E' in stri): #it's definitely a float
return REAL(stri)
else:
return INTEGER(stri)
class Model:
"""
A model contains a list of instances
"""
def __init__(self,name):
self._name = name
# a dict of instances
# each time an instance is added to the model, count is incremented
self._instances = {}
self._number_of_instances = 0
def add_instance(self, instance):
'''
Adds an instance to the model
'''
self._number_of_instances += 1
self._instances[self._number_of_instances-1] = instance
def print_instances(self):
'''
Dump instances to stdout
'''
for idx in range(self._number_of_instances):
"=========="
print "Instance #%i"%(idx+1)
print self._instances[idx]
class Part21EntityInstance:
"""
A class to represent a Part21 instance as defined in one Part21 file
A Part21EntityInstance is defined by the following arguments:
entity_name: a string
entity_attributes: a list of strings to represent an attribute.
For instance, the following expression:
#4 = PRODUCT_DEFINITION_SHAPE('$','$',#5);
will result in :
entity : <class 'config_control_design.product_definition_shape'>
entity_instance_attributes: ['$','$','#5']
"""
def __init__(self,entity_name,attributes):
self._entity
self._attributes_definition = attributes
print self._entity_name
print self._attributes_definition
class Part21Parser:
"""
Loads all instances definition of a Part21 file into memory.
Two dicts are created:
self._instance_definition : stores attibutes, key is the instance integer id
self._number_of_ancestors : stores the number of ancestors of entity id. This enables
to define the order of instances creation.
"""
def __init__(self, filename):
self._filename = filename
# the schema
self._schema_name = ""
# the dict self._instances contain instance definition
self._instances_definition = {}
# this dict contains lists of 0 ancestors, 1 ancestor, etc.
# initializes this dict
self._number_of_ancestors = {}
for i in range(2000):
self._number_of_ancestors[i]=[]
self.parse_file()
# reduce number_of_ancestors dict
for item in self._number_of_ancestors.keys():
if len(self._number_of_ancestors[item])==0:
del self._number_of_ancestors[item]
def get_schema_name(self):
return self._schema_name
print schema_name
def get_number_of_instances(self):
return len(self._instances_definition.keys())
def parse_file(self):
init_time = time.time()
print "Parsing file %s..."%self._filename,
fp = open(self._filename)
while True:
line = fp.readline()
if not line:
break
# there may be a multline definition. In this case, we read lines untill we found
# a ;
#while (not line.endswith(";\r\n")): #its a multiline
# line = line.replace("\r\n","") + fp.readline()
# parse line
match_instance_definition = INSTANCE_DEFINITION_RE.search(line) # id,name,attrs
if match_instance_definition:
instance_id, entity_name, entity_attrs = match_instance_definition.groups()
instance_int_id = int(instance_id)
# find number of ancestors
number_of_ancestors = entity_attrs.count('#')
# fill number of ancestors dict
self._number_of_ancestors[number_of_ancestors].append(instance_int_id)
# parse attributes string
entity_attrs_list, str_len = Utils.process_nested_parent_str(entity_attrs)
# then finally append this instance to the disct instance
self._instances_definition[instance_int_id] = (entity_name,entity_attrs_list)
else: #does not match with entity instance definition, parse the header
if line.startswith('FILE_SCHEMA'):
#identify the schema name
self._schema_name = line.split("'")[1].split("'")[0].split(" ")[0].lower()
fp.close()
print 'done in %fs.'%(time.time()-init_time)
print 'schema: - %s entities %i'%(self._schema_name,len(self._instances_definition.keys()))
class EntityInstancesFactory(object):
'''
This class creates entity instances from the str definition
For instance, the definition:
20: ('CARTESIAN_POINT', ["''", '(5.,125.,20.)'])
will result in:
p = ARRAY(1,3,REAL)
p.[1] = REAL(5)
p.[2] = REAL(125)
p.[3] = REAL(20)
new_instance = cartesian_point(STRING(''),p)
'''
def __init__(self, schema_name, instance_definition):
# First try to import the schema module
pass
class Part21Population(object):
def __init__(self, part21_loader):
""" Take a part21_loader a tries to create entities
"""
self._part21_loader = part21_loader
self._aggregate_scope = []
self._aggr_scope = False
self.create_entity_instances()
def create_entity_instances(self):
""" Starts entity instances creation
"""
for number_of_ancestor in self._part21_loader._number_of_ancestors.keys():
for entity_definition_id in self._part21_loader._number_of_ancestors[number_of_ancestor]:
self.create_entity_instance(entity_definition_id)
def create_entity_instance(self, instance_id):
instance_definition = self._part21_loader._instances_definition[instance_id]
print "Instance definition to process",instance_definition
# first find class name
class_name = instance_definition[0].lower()
print "Class name:%s"%class_name
object_ = globals()[class_name]
# then attributes
#print object_.__doc__
instance_attributes = instance_definition[1]
print "instance_attributes:",instance_attributes
a = object_(*instance_attributes)
if __name__ == "__main__":
import time
import sys
from config_control_design import *
p21loader = Part21Parser("gasket1.p21")
print "Creating instances"
p21population = Part21Population(p21loader)