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#!/usr/bin/env python3
# -*- Coding: UTF-8 -*-
# ---------------------------------------------------------------------------
# Open Asset Import Library (ASSIMP)
# ---------------------------------------------------------------------------
#
# Copyright (c) 2006-2020, ASSIMP Development Team
#
# All rights reserved.
#
# Redistribution and use of this software 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 ASSIMP team, nor the names of its
# contributors may be used to endorse or promote products
# derived from this software without specific prior
# written permission of the ASSIMP Development Team.
#
# 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
# OWNER 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.
# ---------------------------------------------------------------------------
"""Parse an EXPRESS file and extract basic information on all
entities and data types contained"""
import sys
import re
from collections import OrderedDict
re_match_entity = re.compile(r"""
ENTITY\s+(\w+)\s* # 'ENTITY foo'
.*? # skip SUPERTYPE-of
(?:SUBTYPE\s+OF\s+\((\w+)\))?; # 'SUBTYPE OF (bar);' or simply ';'
(.*?) # 'a : atype;' (0 or more lines like this)
(?:(?:INVERSE|UNIQUE|WHERE)\s*$.*?)? # skip the INVERSE, UNIQUE, WHERE clauses and everything behind
END_ENTITY;
""",re.VERBOSE|re.DOTALL|re.MULTILINE)
re_match_type = re.compile(r"""
TYPE\s+(\w+?)\s*=\s*((?:LIST|SET)\s*\[\d+:[\d?]+\]\s*OF)?(?:\s*UNIQUE)?\s*(\w+) # TYPE foo = LIST[1:2] of blub
(?:(?<=ENUMERATION)\s*OF\s*\((.*?)\))?
.*? # skip the WHERE clause
END_TYPE;
""",re.VERBOSE|re.DOTALL)
re_match_field = re.compile(r"""
\s+(\w+?)\s*:\s*(OPTIONAL)?\s*((?:LIST|SET)\s*\[\d+:[\d?]+\]\s*OF)?(?:\s*UNIQUE)?\s*(\w+?);
""",re.VERBOSE|re.DOTALL)
class Schema:
def __init__(self):
self.entities = OrderedDict()
self.types = OrderedDict()
class Entity:
def __init__(self,name,parent,members):
self.name = name
self.parent = parent
self.members = members
class Field:
def __init__(self,name,type,optional,collection):
self.name = name
self.type = type
self.optional = optional
self.collection = collection
self.fullspec = (self.collection+' ' if self.collection else '') + self.type
class Type:
def __init__(self,name,aggregate,equals,enums):
self.name = name
self.aggregate = aggregate
self.equals = equals
self.enums = enums
def read(filename, silent=False):
schema = Schema()
print( "Try to read EXPRESS schema file" + filename)
with open(filename,'rt') as inp:
contents = inp.read()
types = re.findall(re_match_type,contents)
for name,aggregate,equals,enums in types:
schema.types[name] = Type(name,aggregate,equals,enums)
entities = re.findall(re_match_entity,contents)
for name,parent,fields_raw in entities:
print('process entity {0}, parent is {1}'.format(name,parent)) if not silent else None
fields = re.findall(re_match_field,fields_raw)
members = [Field(name,type,opt,coll) for name, opt, coll, type in fields]
print(' got {0} fields'.format(len(members))) if not silent else None
schema.entities[name] = Entity(name,parent,members)
return schema
if __name__ == "__main__":
sys.exit(read(sys.argv[1] if len(sys.argv)>1 else 'schema.exp'))
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