misc/cwfs/cwfs.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Fri, 14 Oct 2011 15:19:25 +0200
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child 10669 155c29e0ed1c
permissions -rw-r--r--
[js] missing trailing comma
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# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
1977
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"""
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"""
0
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class Schema :
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    def __init__(self, schema) :
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        self._schema = schema
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    def get_attrs(self, entity) :
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        return self._schema[entity][0]
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    def get_relations(self, entity) :
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        return self._schema[entity][1]
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    def get_attr_index(self, entity, attr) :
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        return list(self._schema[entity][0]).index(attr)
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SCHEMA = Schema({'societe': ( ('nom','ville'),
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                              [('concerne_par','affaire'),
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                               ] ),
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                 'affaire': ( ('ref',),
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                              [('concerne','societe'),
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                               ('concerne_par', 'document')
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                               ] ),
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                 'document':( ('fichier', 'annee','mois','jour','type'),
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                              [('concerne','affaire'),
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                               ] ),
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                 })
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DATA = { 'societe': [ ('CETIAD', 'Dijon'),
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                      ('EDF_R&D', 'Clamart'),
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                      ('Logilab', 'Paris'),
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                      ],
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         'affaire': [ ('CTIA01', 'CETIAD'),
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                      ('EDFR01', 'EDF_R&D'),
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                      ('EDFR02', 'EDF_R&D'),
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                      ],
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         'document':[ ('CTIA01-040906-PRE-1-01.pdf','2004','09','06','PRE','CTIA01'),
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                      ('EDFR01-050201-CLI-1-01.pdf','2005','02','01','CLI','EDFR01'),
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                      ('EDFR01-050322-OFR-1-01.pdf','2005','03','22','OFR','EDFR01'),
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                      ],
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         }
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def get_data(entity, where=[]) :
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    for value in DATA[entity] :
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        for index, val in where :
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            if value[index] != val :
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                break
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        else :
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            yield value
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class PathParser :
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    def __init__(self, schema, path) :
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        self.schema = schema
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        self.path = path
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        self._components = iter([comp for comp in self.path.split('/') if comp])
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        self._entity = None
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        self._attr = None
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        self._rel = None
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        self._restrictions = []
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    def parse(self) :
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        self._entity = self._components.next()
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        try:
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            self.process_entity()
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        except StopIteration :
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            pass
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    def process_entity(self) :
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        _next = self._components.next()
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        if _next in self.schema.get_attrs(self._entity) :
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            self._attr = _next
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            _next = self._components.next()
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            self._restrictions.append( (self._entity, self._attr, _next) )
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            self._attr = None
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            self._rel = None
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            self.process_entity()
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    def get_list(self) :
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        if self._rel :
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            return
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        elif self._attr :
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            where = []
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            for e,a,v in self._restrictions :
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                i = self.schema.get_attr_index(e, a)
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                where.append( (i,v) )
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            i = self.schema.get_attr_index(self._entity, self._attr)
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            for values in get_data(self._entity,where) :
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                yield values[i]+'/'
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        else :
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            attr_restrict = [a for e,a,v in self._restrictions]
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            for attr in self.schema.get_attrs(self._entity) :
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                if attr not in attr_restrict :
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                    yield attr+'/'
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            for data in DATA[self._entity]:
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                yield data[0]
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            for nom, entity in self.schema.get_relations(self._entity) :
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                yield nom+'/'
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                yield entity+'/'
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0
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def ls(path) :
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    p = PathParser(SCHEMA,path)
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    p.parse()
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    return list(p.get_list())
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class SytPathParser :
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    def __init__(self, schema, path) :
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        self.schema = schema
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        self.path = path
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        self._components = iter([comp for comp in self.path.split('/') if comp])
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        self._e_type = None
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        self._restrictions = []
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        self._alphabet = list('ABCDEFGHIJKLMNOPQRSTUVWXYZ')
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0
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    def parse(self):
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        self._var = self._alphabet.pop(0)
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        self._e_type = self._components.next()
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        e_type = self._e_type.capitalize()
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        self._restrictions.append('%s is %s' % (self._var, e_type))
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        try:
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            self.process_entity()
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        except StopIteration :
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            pass
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        return 'Any %s WHERE %s' % (self._var, ', '.join(self._restrictions))
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0
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    def process_entity(self) :
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        _next = self._components.next()
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        if _next in self.schema.get_attrs(self._e_type) :
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            attr = _next
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            try:
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                _next = self._components.next()
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                self._restrictions.append('%s %s %s' % (self._var, attr, _next))
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            except StopIteration:
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                a_var = self._alphabet.pop(0)
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                self._restrictions.append('%s %s %s' % (self._var, attr, a_var) )
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                self._var = a_var
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                raise
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        elif _next in [r for r,e in self.schema.get_relations(self._e_type)]:
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            rel = _next
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            r_var = self._alphabet.pop(0)
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            self._restrictions.append('%s %s %s' % (self._var, rel, r_var))
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            self._var = r_var
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            try:
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                _next = self._components.next()
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                self._restrictions.append('%s is %s' % (r_var, _next.capitalize()))
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            except StopIteration:
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                raise
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        self.process_entity()
0
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0
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def to_rql(path) :
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    p = SytPathParser(SCHEMA,path)
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    return p.parse()
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