misc/cwfs/cwfs.py
author Katia Saurfelt <katia.saurfelt@logilab.fr>
Wed, 15 Apr 2009 10:03:48 +0200
changeset 1375 5f412bed692c
parent 0 b97547f5f1fa
child 1802 d628defebc17
permissions -rw-r--r--
remove planned_delivery from ProgressTableView
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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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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    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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    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()            
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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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