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use uri::Uri; use specs::xml_specs::XmlDataTypes; /// Contains specifications for validating turtle syntax. pub struct TurtleSpecs {} impl TurtleSpecs { /// Checks if the provided literal is a plain literal that corresponds to the provided data type. /// /// # Examples /// /// ``` /// use rdf::specs::turtle_specs::TurtleSpecs; /// use rdf::specs::xml_specs::XmlDataTypes; /// /// assert!(TurtleSpecs::is_plain_literal(&"3.0".to_string(), &Some(XmlDataTypes::Decimal.to_uri()))); /// assert!(TurtleSpecs::is_plain_literal(&"true".to_string(), &Some(XmlDataTypes::Boolean.to_uri()))); /// assert!(TurtleSpecs::is_plain_literal(&"3e10".to_string(), &Some(XmlDataTypes::Decimal.to_uri()))); /// assert_eq!(TurtleSpecs::is_plain_literal(&"a".to_string(), &Some(XmlDataTypes::Decimal.to_uri())), false); /// ``` pub fn is_plain_literal(literal: &str, data_type: &Option<Uri>) -> bool { if TurtleSpecs::is_double_literal(literal) && *data_type == Some(XmlDataTypes::Decimal.to_uri()) { return true; } if TurtleSpecs::is_boolean_literal(literal) && *data_type == Some(XmlDataTypes::Boolean.to_uri()) { return true; } if TurtleSpecs::is_integer_literal(literal) && (*data_type == Some(XmlDataTypes::Integer.to_uri()) || *data_type == Some(XmlDataTypes::UnsignedLong.to_uri()) || *data_type == Some(XmlDataTypes::Long.to_uri())) { return true; } false } /// Checks if the provided literal is decimal. /// /// # Examples /// /// ``` /// use rdf::specs::turtle_specs::TurtleSpecs; /// /// assert!(TurtleSpecs::is_double_literal(&"3.0".to_string())); /// assert!(TurtleSpecs::is_double_literal(&"3e10".to_string())); /// assert_eq!(TurtleSpecs::is_double_literal(&"a".to_string()), false); /// ``` pub fn is_double_literal(literal: &str) -> bool { match literal.parse::<f64>() { Ok(_) => true, Err(_) => false, } } /// Checks if the provided literal is an integer. /// /// # Examples /// /// ``` /// use rdf::specs::turtle_specs::TurtleSpecs; /// /// assert!(TurtleSpecs::is_integer_literal(&"3".to_string())); /// assert_eq!(TurtleSpecs::is_integer_literal(&"3.0".to_string()), false); /// ``` pub fn is_integer_literal(literal: &str) -> bool { match literal.parse::<i64>() { Ok(_) => true, Err(_) => false, } } /// Checks if the provided literal is a boolean. /// /// # Examples /// /// ``` /// use rdf::specs::turtle_specs::TurtleSpecs; /// /// assert!(TurtleSpecs::is_boolean_literal(&"true".to_string())); /// assert!(TurtleSpecs::is_boolean_literal(&"false".to_string())); /// assert_eq!(TurtleSpecs::is_boolean_literal(&"1".to_string()), false); /// ``` pub fn is_boolean_literal(literal: &str) -> bool { match literal.parse::<bool>() { Ok(_) => true, Err(_) => false, } } }