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Diffstat (limited to 'Monitoring/src/main/python/Semantics/UnitModel.py')
| -rw-r--r-- | Monitoring/src/main/python/Semantics/UnitModel.py | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/Monitoring/src/main/python/Semantics/UnitModel.py b/Monitoring/src/main/python/Semantics/UnitModel.py new file mode 100644 index 0000000..af8ec74 --- /dev/null +++ b/Monitoring/src/main/python/Semantics/UnitModel.py @@ -0,0 +1,364 @@ +''' +Created on Feb 12, 2012 + +@author: steger +''' + +class UnitModel(object): + ''' + @summary: an interface to infer prefix, unit and dimension related information from the model + ''' + + def __init__(self, ontology): + ''' + @summary: constructor + @param ontology: the basic knowledge + @type ontology: Ontology + ''' + self.ontology = ontology + + def inferPrefixes(self): + ''' + @summary: iterate over all prefixes defined in the model. + @return: a generator of the prefix details: (reference, symbol, base, exponent) + @rtype: (URIRef, str, int, int) + @todo: in case the unit:base is not present in a Prefix individual, + we should fall back to the restriction on the base defined for the given sibling of the Prefix. + This sibling is referenced ?basegroup in the query. + ''' + q = """ +SELECT ?prefix ?symbol ?base ?exponent +WHERE { + ?prefix a <http://www.w3.org/2002/07/owl#NamedIndividual> ; + a ?basegroup ; + unit:exponent ?exponent ; + unit:base ?base . + ?basegroup rdfs:subClassOf unit:Prefix . + OPTIONAL { + ?prefix unit:symbol ?symbol . + } +} + """ + for uri_prefix, symbol, base, exponent in self.ontology.query(q): + if symbol is None: + yield uri_prefix, self.ontology._tail(uri_prefix), int(base), int(exponent) + else: + yield uri_prefix, str(symbol), int(base), int(exponent) + + def inferPrefixSymbolOf(self, prefixuri): + ''' + @summary: generates an short written form of a unit prefix if unit:symbol is present in the model, + otherwise an abbreviation is derived from the tail of the uri (the reference name to the individual). + @param prefixuri: the uri reference to the unit prefix + @type prefixuri: URIRef + @return: the short form + @rtype: str + ''' + try: + _, _, symbol = self.ontology.graph.triples((prefixuri, self.ontology.ns('unit')['symbol'], None)).next() + return str(symbol) + except StopIteration: + return self.ontology._tail(prefixuri) + + + def inferBaseUnits(self): + ''' + @summary: iterate over all BaseUnits defined in the model. + @return: a generator of the unit details: (reference, symbol) + @rtype: (URIRef, str) + ''' + q = """ +SELECT ?unit ?symbol +WHERE { + ?unit a <http://www.w3.org/2002/07/owl#NamedIndividual> ; + a unit:BaseUnit . + OPTIONAL { + ?unit unit:symbol ?symbol . + } +} + """ + for uri_unit, symbol in self.ontology.query(q): + if symbol is None: + yield uri_unit, self.ontology._tail(uri_unit) + else: + yield uri_unit, str(symbol) + + def inferPowerUnits(self): + ''' + @summary: iterate over all PowerUnits defined in the model. + @return: a generator of the unit details: (reference, symbol, powerof, exponent) + @rtype: (URIRef, str, URIRef, int) + ''' + q = """ +SELECT ?unit ?symbol ?powerof ?exponent +WHERE { + ?unit a <http://www.w3.org/2002/07/owl#NamedIndividual> ; + a unit:PowerUnit ; + unit:exponent ?exponent ; + unit:derivedFrom ?powerof . + OPTIONAL { + ?unit unit:symbol ?symbol . + } +} + """ + for uri_unit, symbol, uri_powerof, exponent in self.ontology.query(q): + if symbol is None: + yield uri_unit, self.ontology._tail(uri_unit), uri_powerof, int(exponent) + else: + yield uri_unit, str(symbol), uri_powerof, int(exponent) + + def inferProductUnits(self): + ''' + @summary: iterate over all ProductUnits defined in the model. + @return: a generator of the unit details: (reference, symbol, productof) + @rtype: (URIRef, str, set(URIRef)) + ''' + q = """ +SELECT ?unit ?symbol ?productof +WHERE { + ?unit a <http://www.w3.org/2002/07/owl#NamedIndividual> ; + a unit:ProductUnit ; + unit:derivedFrom ?productof + OPTIONAL { + ?unit unit:symbol ?symbol . + } +} + """ + container = {} + for uri_unit, symbol, uri_productof in self.ontology.query(q): + if symbol is None: + key = uri_unit, self.ontology_tail(uri_unit) + else: + key = uri_unit, str(symbol) + if not container.has_key(key): + container[key] = set() + container[key].add(uri_productof) + for (uri_unit, symbol), productof in container.iteritems(): + yield uri_unit, symbol, productof + + def inferLinearTransformedUnits(self): + ''' + @summary: iterate over all LinearTransformedUnits defined in the model. + @return: a generator of the unit details: (reference, symbol, derivedfrom, scale, offset) + @rtype: (URIRef, str, URIRef, float, float) + ''' + q = """ +SELECT ?unit ?symbol ?scale ?offset ?derivedfrom +WHERE { + ?unit a <http://www.w3.org/2002/07/owl#NamedIndividual> ; + a unit:LinearTransformedUnit ; + unit:derivedFrom ?derivedfrom ; + unit:scale ?scale . + OPTIONAL { + ?unit unit:offset ?offset . + } + OPTIONAL { + ?unit unit:symbol ?symbol . + } +} + """ + for uri_unit, symbol, scale, offset, uri_derivedfrom in self.ontology.query(q): + if offset is None: + offset = 0 + else: + offset = self.ontology._float(offset) + if symbol is None: + yield uri_unit, self.ontology._tail(uri_unit), uri_derivedfrom, self.ontology._float(scale), offset + else: + yield uri_unit, str(symbol), uri_derivedfrom, self.ontology._float(scale), offset + + def inferRegexpTransformedUnits(self): + ''' + @summary: iterate over all RegexpTransformedUnits defined in the model. + @return: a generator of the unit details: (reference, symbol, derivedfrom, expr_fwd, expr_inv) + @rtype: (URIRef, str, URIRef, str, str) + ''' + q = """ +SELECT ?unit ?symbol ?derivedfrom ?fwd ?inv +WHERE { + ?unit a <http://www.w3.org/2002/07/owl#NamedIndividual> ; + a unit:RegexpTransformedUnit ; + unit:derivedFrom ?derivedfrom ; + unit:forwardExpression ?fwd ; + unit:inverseExpression ?inv . + OPTIONAL { + ?unit unit:symbol ?symbol . + } +} + """ + for uri_unit, symbol, uri_derivedfrom, expr_fwd, expr_inv in self.ontology.query(q): + if symbol is None: + yield uri_unit, self.ontology._tail(uri_unit), uri_derivedfrom, str(expr_fwd), str(expr_inv) + else: + yield uri_unit, str(symbol), uri_derivedfrom, str(expr_fwd), str(expr_inv) + + def inferPossiblePrefixesOf(self, uri_unit): + ''' + @summary: extract possible prefixes for the given unit + @param unit: reference to the unit + @type unit: URIRef + @return: a generator over the references of the possible unit prefixes + @rtype: URIRef + ''' + for _, _, uri_prefix in self.ontology.graph.triples((uri_unit, self.ontology.ns('unit')['possiblePrefix'], None)): + yield uri_prefix + + def inferBaseDimensions(self): + ''' + @summary: extract BaseDimensions and their corresponding units from the model + @return: a generator of the BaseDimension details: (reference, unit, level) + @rtype: (URIRef, URIRef, str) + ''' + q = """ +SELECT ?dimension ?unit ?level +WHERE { + ?dimension rdfs:subClassOf unit:BaseDimension ; + rdfs:subClassOf ?constraint ; + rdfs:subClassOf ?level . + ?constraint owl:onProperty unit:defaultUnit ; + owl:hasValue ?unit . + FILTER regex(?level, "Level") . +} + """ + for uri_dimension, uri_unit, level in self.ontology.query(q): + yield uri_dimension, uri_unit, level + + def inferDifferenceDimensions(self): + ''' + @summary: extract DifferenceDimensions and their corresponding units from the model + @return: a generator of the DifferenceDimension details: (reference, unit, derivedfrom) + @rtype: (URIRef, URIRef, URIRef) + ''' + q = """ +SELECT ?dimension ?unit ?derivedFrom +WHERE { + ?dimension rdfs:subClassOf unit:DifferenceDimension ; + rdfs:subClassOf ?constraint1 ; + rdfs:subClassOf ?constraint2 . + ?constraint1 owl:onProperty unit:defaultUnit ; + owl:hasValue ?unit . + ?constraint2 owl:onProperty unit:derivedFrom ; + owl:onClass ?derivedFrom . +} + """ + for uri_dimension, uri_unit, uri_derivedfrom in self.ontology.query(q): + yield uri_dimension, uri_unit, uri_derivedfrom + + def inferPowerDimensions(self): + ''' + @summary: extract PowerDimensions and their corresponding units from the model + @return: a generator of the PowerDimension details: (reference, unit, derivedfrom, exponent) + @rtype: (URIRef, URIRef, URIRef, int) + ''' + q = """ +SELECT ?dimension ?unit ?derivedFrom ?exponent +WHERE { + ?dimension rdfs:subClassOf unit:PowerDimension ; + rdfs:subClassOf ?constraint1 ; + rdfs:subClassOf ?constraint2 ; + rdfs:subClassOf ?constraint3 . + ?constraint1 owl:onProperty unit:defaultUnit ; + owl:hasValue ?unit . + ?constraint2 owl:onProperty unit:derivedFrom ; + owl:onClass ?derivedFrom . + ?constraint3 owl:onProperty unit:exponent ; + owl:hasValue ?exponent . +} + """ + for uri_dimension, uri_unit, uri_derivedfrom, exponent in self.ontology.query(q): + yield uri_dimension, uri_unit, uri_derivedfrom, int(exponent) + + def inferProductDimensions(self): + ''' + @summary: extract ProductDimensions and their corresponding units from the model + @return: a generator of the ProductDimension details: (reference, unit, set of derivedfrom references) + @rtype: (URIRef, URIRef, tuple(URIRef)) + ''' + q = """ +SELECT ?dimension ?unit ?derivedFrom +WHERE { + ?dimension rdfs:subClassOf unit:ProductDimension ; + rdfs:subClassOf ?constraint1 ; + rdfs:subClassOf ?constraint2 . + ?constraint1 owl:onProperty unit:defaultUnit ; + owl:hasValue ?unit . + ?constraint2 owl:onProperty unit:derivedFrom ; + owl:onClass ?derivedFrom . +} + """ + container = {} + for uri_dimension, uri_unit, uri_derivedfrom in self.ontology.query(q): + if not container.has_key(uri_dimension): + container[uri_dimension] = (uri_unit, set()) + container[uri_dimension][1].add(uri_derivedfrom) + for uri_dimension, (uri_unit, set_derivedfrom) in container.iteritems(): + yield uri_dimension, uri_unit, tuple(set_derivedfrom) + + def inferRatioDimensions(self): + ''' + @summary: extract RatioDimensions and their corresponding units from the model + @return: a generator of the RatioDimension details: (reference, unit, derivedfrom) + @rtype: (URIRef, URIRef, URIRef) + ''' + q = """ +SELECT ?dimension ?unit ?derivedFrom +WHERE { + ?dimension rdfs:subClassOf unit:RatioDimension ; + rdfs:subClassOf ?constraint1 ; + rdfs:subClassOf ?constraint2 . + ?constraint1 owl:onProperty unit:defaultUnit ; + owl:hasValue ?unit . + ?constraint2 owl:onProperty unit:derivedFrom ; + owl:onClass ?derivedFrom . +} + """ + for uri_dimension, uri_unit, uri_derivedfrom in self.ontology.query(q): + yield uri_dimension, uri_unit, uri_derivedfrom + + + + + + + + + + + + + + + + + + + + + +#OBSOLETED: + def inferUnitSymbolOf(self, unituri, prefixuri = None): + raise Exception("OBSOLETE") +# ''' +# @summary: generates an short written form of a unit if symbols are present for the prefix (optional) and the unit itself. +# If either of them is missing abbreviation is derived from the tail of the uri (name of the individual). +# @param unituri: the unit +# @type unituri: URIRef +# @param prefixuri: the prefix (optional) +# @type prefixuri: URIRef or None +# @return: the short form +# @rtype: str +# ''' +# if prefixuri is None: +# prefix = "" +# else: +# try: +# _, _, symbol = self.graph.triples((prefixuri, self.ns('unit')['symbol'], None)).next() +# prefix = str(symbol) +# except StopIteration: +# prefix = self._tail(prefixuri) +# try: +# _, _, symbol = self.graph.triples((unituri, self.ns('unit')['symbol'], None)).next() +# return "%s%s" % (prefix, str(symbol)) +# except StopIteration: +# return "%s%s" % (prefix, self._tail(unituri)) + |