Provided by: libattean-perl_0.021-1_all
Attean::API::Binding - Name to term bindings
This document describes Attean::API::Binding version 0.021
The Attean::API::Binding role defines a common API for all objects that map names to Attean::API::Term objects. This includes triples, quads, and SPARQL results (variable bindings).
Classes consuming this role must provide the following methods: "value( $name )" Returns the Attean::API::Term object mapped to the variable named $name, or "undef" if no such term is mapped. "variables" Returns a list of the variable names mapped to Attean::API::Term objects in this mapping. "apply_map( $mapper )" Returns a new mapping object (of the same class as the referent) with term objects rewritten using the supplied Attean::Mapper object $mapper.
This role provides default implementations of the following methods: "mapping" Returns a HASH mapping variable names to Attean::API::Term objects. "values" Returns a list of Attean::API::Term objects corresponding to the variable names returned by the referent's "variables" method. "tuples_string" Returns a string serialization of the Attean::API::Term objects in the order they are returned by the referent's "values" method. "as_string" Returns a string serialization of the variable bindings. "has_blanks" Returns true if any variable is bound to an Attean::API::Blank term, false otherwise. "is_ground" Returns tue is all the bound values consume Attean::API::Term, false otherwise. "values_consuming_role( $role )" Returns the list of bound values that consume $role. "tree_attributes" Returns the variables which are bound in this object. "apply_bindings( $binding )" Construct a new binding by replacing variables with their bound values from $binding. "parse ( $string )" Returns a triple or quad pattern object using the variables and/or terms parsed from $string in SPARQL syntax. "project( @keys )" Returns a new Attean::Result binding which contains variable-value mappings from the invocant for every variable name in @keys.
Please report any bugs or feature requests to through the GitHub web interface at <https://github.com/kasei/attean/issues>.
Gregory Todd Williams "<email@example.com>"
Copyright (c) 2014--2018 Gregory Todd Williams. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.