Class: RDF::Turtle::FreebaseReader
- Inherits:
-
NTriples::Reader
- Object
- Reader
- NTriples::Reader
- RDF::Turtle::FreebaseReader
- Includes:
- Terminals
- Defined in:
- vendor/bundler/ruby/3.3.0/bundler/gems/rdf-turtle-6506e92ccd8e/lib/rdf/turtle/freebase_reader.rb
Overview
Parser specifically for Freebase, which has a very regular form.
Constant Summary
Constants included from Terminals
Terminals::ANON, Terminals::BASE, Terminals::BLANK_NODE_LABEL, Terminals::DECIMAL, Terminals::DOUBLE, Terminals::ECHAR, Terminals::EXPONENT, Terminals::INTEGER, Terminals::IRIREF, Terminals::IRI_RANGE, Terminals::LANG_DIR, Terminals::PERCENT, Terminals::PLX, Terminals::PNAME_LN, Terminals::PNAME_NS, Terminals::PN_CHARS, Terminals::PN_CHARS_BASE, Terminals::PN_CHARS_BODY, Terminals::PN_CHARS_U, Terminals::PN_LOCAL, Terminals::PN_LOCAL_BODY, Terminals::PN_LOCAL_ESC, Terminals::PN_PREFIX, Terminals::PREFIX, Terminals::STRING_LITERAL_LONG_QUOTE, Terminals::STRING_LITERAL_LONG_SINGLE_QUOTE, Terminals::STRING_LITERAL_QUOTE, Terminals::STRING_LITERAL_SINGLE_QUOTE, Terminals::UCHAR, Terminals::U_CHARS1, Terminals::U_CHARS2, Terminals::WS
Constants inherited from NTriples::Reader
NTriples::Reader::BLANK_NODE_LABEL, NTriples::Reader::COMMENT, NTriples::Reader::DATATYPE_URI, NTriples::Reader::ECHAR, NTriples::Reader::END_OF_STATEMENT, NTriples::Reader::ESCAPE_CHARS, NTriples::Reader::ESCAPE_CHARS_ESCAPED, NTriples::Reader::ESCAPE_CHARS_ESCAPED_REGEXP, NTriples::Reader::IRIREF, NTriples::Reader::IRI_RANGE, NTriples::Reader::LANGTAG, NTriples::Reader::LANG_DIR, NTriples::Reader::LITERAL, NTriples::Reader::LITERAL_PLAIN, NTriples::Reader::LITERAL_WITH_DATATYPE, NTriples::Reader::LITERAL_WITH_LANGUAGE, NTriples::Reader::NODEID, NTriples::Reader::OBJECT, NTriples::Reader::PN_CHARS, NTriples::Reader::PN_CHARS_BASE, NTriples::Reader::PN_CHARS_U, NTriples::Reader::PREDICATE, NTriples::Reader::QT_END, NTriples::Reader::QT_START, NTriples::Reader::STRING_LITERAL_QUOTE, NTriples::Reader::SUBJECT, NTriples::Reader::TT_END, NTriples::Reader::TT_START, NTriples::Reader::UCHAR, NTriples::Reader::UCHAR4, NTriples::Reader::UCHAR8, NTriples::Reader::URIREF, NTriples::Reader::U_CHARS1, NTriples::Reader::U_CHARS2
Constants included from Util::Logger
Instance Attribute Summary
Attributes inherited from Reader
Attributes included from Enumerable
Class Method Summary collapse
Instance Method Summary collapse
-
#read_boolean ⇒ RDF::Literal::Boolean
Read a boolean value.
- #read_literal ⇒ RDF::Literal
-
#read_numeric ⇒ RDF::Literal::Integer, ...
Read a numeric value.
-
#read_pname(**options) ⇒ RDF::URI
Read a PNAME of the form
prefix:suffix
. -
#read_prefix ⇒ RDF::URI
Read a prefix of the form `@prefix pfx:
. -
#read_triple ⇒ Object
Extension to N-Triples reader, includes reading pnames and prefixes.
Methods inherited from NTriples::Reader
parse_literal, parse_node, parse_object, parse_predicate, parse_subject, parse_uri, #read_comment, #read_eos, #read_node, #read_quotedTriple, #read_tripleTerm, #read_uriref, #read_value, unescape, unserialize
Methods included from Util::Logger
#log_debug, #log_depth, #log_error, #log_fatal, #log_info, #log_recover, #log_recovering?, #log_statistics, #log_warn, #logger
Methods inherited from Reader
#base_uri, #canonicalize?, #close, each, #each_pg_statement, #each_statement, #each_triple, #encoding, #fail_object, #fail_predicate, #fail_subject, for, #initialize, #intern?, #lineno, open, options, #prefix, #prefixes, #prefixes=, #read_statement, #rewind, #to_sym, to_sym, #valid?, #validate?
Methods included from Util::Aliasing::LateBound
Methods included from Enumerable
add_entailment, #canonicalize, #canonicalize!, #dump, #each_graph, #each_object, #each_predicate, #each_quad, #each_statement, #each_subject, #each_term, #each_triple, #entail, #enum_graph, #enum_object, #enum_predicate, #enum_quad, #enum_statement, #enum_subject, #enum_term, #enum_triple, #graph?, #graph_names, #invalid?, #method_missing, #object?, #objects, #predicate?, #predicates, #project_graph, #quad?, #quads, #respond_to_missing?, #statement?, #statements, #subject?, #subjects, #supports?, #term?, #terms, #to_a, #to_h, #to_set, #triple?, #triples, #valid?, #validate!
Methods included from Isomorphic
#bijection_to, #isomorphic_with?
Methods included from Countable
Methods included from Readable
Constructor Details
This class inherits a constructor from RDF::Reader
Dynamic Method Handling
This class handles dynamic methods through the method_missing method in the class RDF::Enumerable
Class Method Details
Instance Method Details
#read_boolean ⇒ RDF::Literal::Boolean
Read a boolean value
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/rdf-turtle-6506e92ccd8e/lib/rdf/turtle/freebase_reader.rb', line 123 def read_boolean if bool_str = match(/^(true|false)/) RDF::Literal::Boolean.new(bool_str, canonicalize: canonicalize?) end end |
#read_literal ⇒ RDF::Literal
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/rdf-turtle-6506e92ccd8e/lib/rdf/turtle/freebase_reader.rb', line 86 def read_literal if literal_str = match(LITERAL_PLAIN) literal_str = self.class.unescape(literal_str) literal = case when lang_dir = match(RDF::Turtle::Reader::LANG_DIR) language, direction = lang_dir.split('--') RDF::Literal.new(literal_str, language: language, direction: direction) when datatype = match(/^(\^\^)/) RDF::Literal.new(literal_str, datatype: read_pname(intern: true) || read_uriref || fail_object) else RDF::Literal.new(literal_str) # plain string literal end literal.validate! if validate? literal.canonicalize! if canonicalize? literal end end |
#read_numeric ⇒ RDF::Literal::Integer, ...
Read a numeric value
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/rdf-turtle-6506e92ccd8e/lib/rdf/turtle/freebase_reader.rb', line 107 def read_numeric case when double_str = match(/^(#{DOUBLE})/) double_str = double_str.sub(/\.([eE])/, '.0\1') RDF::Literal::Double.new(double_str, canonicalize: canonicalize?) when decimal_str = match(/^(#{DECIMAL})/) decimal_str = "0#{decimal_str}" if decimal_str[0,1] == "." RDF::Literal::Decimal.new(decimal_str, canonicalize: canonicalize?) when integer_str = match(/^(#{INTEGER})/) RDF::Literal::Integer.new(integer_str, canonicalize: canonicalize?) end end |
#read_pname(**options) ⇒ RDF::URI
Read a PNAME of the form prefix:suffix
.
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/rdf-turtle-6506e92ccd8e/lib/rdf/turtle/freebase_reader.rb', line 58 def read_pname(**) if pname_str = match(/^(\w+:\S+)/) ns, suffix = pname_str.split(':', 2) if suffix[-1,1] == "." suffix.chop! # Remove end of statement @line.insert(0, ".") end pfx_iri = prefix(ns) raise RDF::ReaderError.new("ERROR [line #{lineno}] prefix #{ns.inspect} is not defined", lineno: lineno) unless pfx_iri # Unescape PN_LOCAL_ESC suffix = suffix.gsub(PN_LOCAL_ESC) {|esc| esc[1]} if suffix.match?(PN_LOCAL_ESC) # Remove any redundant leading hash from suffix suffix = suffix.sub(/^\#/, "") if pfx_iri.to_s.index("#") uri = RDF::URI(pfx_iri + suffix) uri.validate! if validate? uri end rescue ArgumentError => e raise RDF::ReaderError.new("ERROR [line #{lineno}] invalid PName", lineno: lineno) end |
#read_prefix ⇒ RDF::URI
Read a prefix of the form `@prefix pfx:
Add prefix definition to prefixes
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/rdf-turtle-6506e92ccd8e/lib/rdf/turtle/freebase_reader.rb', line 47 def read_prefix if prefix_str = match(/^@prefix\s+(\w+:\s+#{IRIREF})\s*.$/) prefix, iri = prefix_str.split(/:\s+/) return nil unless iri prefix(prefix, iri[1..-2]) end end |
#read_triple ⇒ Object
Extension to N-Triples reader, includes reading pnames and prefixes
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/rdf-turtle-6506e92ccd8e/lib/rdf/turtle/freebase_reader.rb', line 17 def read_triple loop do begin readline.strip! line = @line unless blank? || read_prefix subject = read_pname(intern: true) || fail_subject predicate = read_pname(intern: true) || fail_predicate object = read_pname || read_uriref || read_boolean || read_numeric || read_literal || fail_object if validate? && !read_eos log_error("Expected end of statement (found: #{current_line.inspect})", lineno: lineno, exception: RDF::ReaderError) end return [subject, predicate, object] end rescue RDF::ReaderError => e raise e if validate? if @options[:errors] @options[:errors] << e. else $stderr.puts e. end end end end |