Class: SPARQL::Grammar::Parser11
- Includes:
- EBNF::LL1::Parser, Meta11, Terminals
- Defined in:
- vendor/bundler/ruby/3.3.0/bundler/gems/sparql-796d3be4aa08/lib/sparql/grammar/parser11.rb
Overview
A parser for the SPARQL 1.1 grammar.
Constant Summary collapse
- BUILTINS =
Builtin functions
%w{ ABS ADJUST BNODE CEIL COALESCE CONCAT CONTAINS DATATYPE DAY ENCODE_FOR_URI FLOOR HOURS IF IRI LANGMATCHES LANG LCASE MD5 MINUTES MONTH NOW RAND ROUND SECONDS SHA1 SHA224 SHA256 SHA384 SHA512 STRAFTER STRBEFORE STRDT STRENDS STRLANG STRLEN STRSTARTS STRUUID STR TIMEZONE TZ UCASE URI UUID YEAR isBLANK isIRI isURI isLITERAL isNUMERIC sameTerm isTRIPLE TRIPLE SUBJECT PREDICATE OBJECT }.map {|s| s.downcase.to_sym}.freeze
- BUILTIN_RULES =
[:aggregate, :regex, :substr, :replace, :exists, :notexists].freeze
- AGGREGATE_RULES =
[:count, :sum, :min, :max, :avg, :sample, :group_concat]
Constants included from Terminals
Terminals::ANON, Terminals::BLANK_NODE_LABEL, Terminals::DECIMAL, Terminals::DECIMAL_NEGATIVE, Terminals::DECIMAL_POSITIVE, Terminals::DOUBLE, Terminals::DOUBLE_NEGATIVE, Terminals::DOUBLE_POSITIVE, Terminals::ECHAR, Terminals::EXPONENT, Terminals::INTEGER, Terminals::INTEGER_NEGATIVE, Terminals::INTEGER_POSITIVE, Terminals::IRIREF, Terminals::IRI_RANGE, Terminals::LANGTAG, Terminals::LANG_DIR, Terminals::NIL, 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::STRING_LITERAL1, Terminals::STRING_LITERAL2, Terminals::STRING_LITERAL_LONG1, Terminals::STRING_LITERAL_LONG2, Terminals::STR_EXPR, Terminals::STR_MAP, Terminals::U_CHARS1, Terminals::U_CHARS2, Terminals::VAR1, Terminals::VAR2, Terminals::VARNAME, Terminals::WS
Constants included from Meta11
Meta11::BRANCH, Meta11::CLEANUP, Meta11::FIRST, Meta11::FOLLOW, Meta11::START, Meta11::TERMINALS
Instance Attribute Summary collapse
-
#input ⇒ String
The current input string being processed.
-
#options ⇒ Hash
readonly
Any additional options for the parser.
-
#result ⇒ Array
The internal representation of the result using hierarchy of RDF objects and SPARQL::Algebra::Operator objects.
-
#tokens ⇒ Array<Token>
readonly
The current input tokens being processed.
Attributes included from EBNF::LL1::Parser
Instance Method Summary collapse
-
#initialize(input = nil, **options) {|parser| ... } ⇒ SPARQL::Grammar::Parser
constructor
Initializes a new parser instance.
- #ll1_parse ⇒ Object
-
#parse(prod = START) ⇒ RDF::Queryable
Parse query.
- #to_s ⇒ Object
- #to_sxp_bin ⇒ String
-
#valid? ⇒ Boolean
Returns
true
if the input string is syntactically valid.
Methods included from EBNF::LL1::Parser
#add_prod_data, #add_prod_datum, #debug, #depth, #error, #prod_data, #progress, #warn
Constructor Details
#initialize(input = nil, **options) {|parser| ... } ⇒ SPARQL::Grammar::Parser
Initializes a new parser instance.
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/sparql-796d3be4aa08/lib/sparql/grammar/parser11.rb', line 2073 def initialize(input = nil, **, &block) @input = case input when IO, StringIO then input.read else input.to_s.dup end @input.encode!(Encoding::UTF_8) if @input.respond_to?(:encode!) @options = {anon_base: "b0", validate: false}.merge() debug("base IRI") {base_uri.inspect} debug("validate") {validate?.inspect} @vars = {} @nd_var_gen = "0" if block_given? case block.arity when 0 then instance_eval(&block) else block.call(self) end end end |
Instance Attribute Details
#input ⇒ String
The current input string being processed.
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/sparql-796d3be4aa08/lib/sparql/grammar/parser11.rb', line 42 def input @input end |
#options ⇒ Hash (readonly)
Any additional options for the parser.
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/sparql-796d3be4aa08/lib/sparql/grammar/parser11.rb', line 36 def @options end |
#result ⇒ Array
The internal representation of the result using hierarchy of RDF objects and SPARQL::Algebra::Operator objects.
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/sparql-796d3be4aa08/lib/sparql/grammar/parser11.rb', line 54 def result @result end |
#tokens ⇒ Array<Token> (readonly)
The current input tokens being processed.
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/sparql-796d3be4aa08/lib/sparql/grammar/parser11.rb', line 48 def tokens @tokens end |
Instance Method Details
#ll1_parse ⇒ Object
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/sparql-796d3be4aa08/lib/sparql/grammar/parser11.rb', line 2115 alias_method :ll1_parse, :parse |
#parse(prod = START) ⇒ RDF::Queryable
Parse query
The result is a SPARQL Algebra S-List. Productions return an array such as the following:
(prefix ((: http://example/)) (union (bgp (triple ?s ?p ?o)) (graph ?g (bgp (triple ?s ?p ?o)))))
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/sparql-796d3be4aa08/lib/sparql/grammar/parser11.rb', line 2132 def parse(prod = START) ll1_parse(@input, prod.to_sym, branch: BRANCH, first: FIRST, follow: FOLLOW, whitespace: WS, **@options ) # The last thing on the @prod_data stack is the result @result = case when !prod_data.is_a?(Hash) prod_data when prod_data.empty? nil when prod_data[:query] Array(prod_data[:query]).length == 1 ? prod_data[:query].first : prod_data[:query] when prod_data[:update] prod_data[:update] else key = prod_data.keys.first [key] + Array(prod_data[key]) # Creates [:key, [:triple], ...] end # Validate resulting expression @result.validate! if @result && validate? @result end |
#to_s ⇒ Object
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/sparql-796d3be4aa08/lib/sparql/grammar/parser11.rb', line 2111 def to_s @result.to_sxp end |
#to_sxp_bin ⇒ String
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/sparql-796d3be4aa08/lib/sparql/grammar/parser11.rb', line 2107 def to_sxp_bin @result end |
#valid? ⇒ Boolean
Returns true
if the input string is syntactically valid.
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# File 'vendor/bundler/ruby/3.3.0/bundler/gems/sparql-796d3be4aa08/lib/sparql/grammar/parser11.rb', line 2099 def valid? parse true rescue Error false end |