Class: JSON::LD::EvaluationContext
- Inherits:
-
Object
- Object
- JSON::LD::EvaluationContext
- Includes:
- Utils
- Defined in:
- lib/json/ld/evaluation_context.rb
Overview
:nodoc:
Instance Attribute Summary collapse
-
#base ⇒ Object
readonly
The base.
-
#coercions ⇒ Object
Type coersion.
-
#containers ⇒ Object
List coercion.
-
#default_language ⇒ Object
Default language.
-
#iri_to_curie ⇒ Object
Reverse mappings from IRI to a term or CURIE.
-
#iri_to_term ⇒ Object
Reverse mappings from IRI to term only for terms, not CURIEs.
-
#languages ⇒ Object
Language coercion.
-
#mappings ⇒ Object
A list of current, in-scope mappings from term to IRI.
-
#options ⇒ Object
Global options used in generating IRIs.
-
#provided_context ⇒ Object
A context provided to us that we can use without re-serializing.
-
#vocab ⇒ Object
Default vocabulary.
Instance Method Summary collapse
-
#alias(value) ⇒ String
Reverse term mapping, typically used for finding aliases for keys.
-
#coerce(property) ⇒ RDF::URI, '@id'
Retrieve term coercion.
-
#compact_iri(iri, options = {}) ⇒ String
Compact an IRI.
-
#compact_value(property, value, options = {}) ⇒ Hash
Compact a value.
-
#container(property) ⇒ String
Retrieve container mapping, add it if ‘value` is provided.
- #dup ⇒ Object
-
#expand_iri(iri, options = {}) ⇒ RDF::URI, String
Expand an IRI.
-
#expand_value(property, value, options = {}) ⇒ Hash
Expand a value from compacted to expanded form making the context unnecessary.
-
#initialize(options = {}) {|ec| ... } ⇒ EvaluationContext
constructor
Create new evaluation context.
- #inspect ⇒ Object
-
#language(property) ⇒ String
Retrieve the language associated with a property, or the default language otherwise.
-
#mapping(term) ⇒ RDF::URI, String
Retrieve term mapping.
-
#parse(context) ⇒ Object
Create an Evaluation Context using an existing context as a start by parsing the input.
-
#serialize(options = {}) ⇒ Hash
Generate @context.
-
#set_coerce(property, value) ⇒ RDF::URI, '@id'
Set term coercion.
-
#set_container(property, value) ⇒ Boolean
Set container mapping.
-
#set_language(property, value) ⇒ String
Set language mapping.
-
#set_mapping(term, value) ⇒ RDF::URI, String
Set term mapping.
-
#term_valid?(term) ⇒ Boolean
Determine if ‘term` is a suitable term.
Methods included from Utils
#blank_node?, #list?, #subject?, #subject_reference?, #value?
Constructor Details
#initialize(options = {}) {|ec| ... } ⇒ EvaluationContext
Create new evaluation context
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# File 'lib/json/ld/evaluation_context.rb', line 88 def initialize( = {}) @base = RDF::URI([:base]) if [:base] @mappings = {} @coercions = {} @containers = {} @languages = {} @iri_to_curie = {} @iri_to_term = { RDF.to_uri.to_s => "rdf", RDF::XSD.to_uri.to_s => "xsd" } @options = # Load any defined prefixes ([:prefixes] || {}).each_pair do |k, v| @iri_to_term[v.to_s] = k unless k.nil? end debug("init") {"iri_to_term: #{iri_to_term.inspect}"} yield(self) if block_given? end |
Instance Attribute Details
#base ⇒ Object (readonly)
The base.
The document base IRI, used for expanding relative IRIs.
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# File 'lib/json/ld/evaluation_context.rb', line 14 def base @base end |
#coercions ⇒ Object
Type coersion
The @type keyword is used to specify type coersion rules for the data. For each key in the map, the key is a String representation of the property for which String values will be coerced and the value is the datatype (or @id) to coerce to. Type coersion for the value ‘@id` asserts that all vocabulary terms listed should undergo coercion to an IRI, including CURIE processing for compact IRI Expressions like `foaf:homepage`.
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# File 'lib/json/ld/evaluation_context.rb', line 40 def coercions @coercions end |
#containers ⇒ Object
List coercion
The @container keyword is used to specify how arrays are to be treated. A value of @list indicates that arrays of values are to be treated as an ordered list. A value of @set indicates that arrays are to be treated as unordered and that singular values are always coerced to an array form on expansion and compaction.
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# File 'lib/json/ld/evaluation_context.rb', line 49 def containers @containers end |
#default_language ⇒ Object
Default language
This adds a language to plain strings that aren’t otherwise coerced
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# File 'lib/json/ld/evaluation_context.rb', line 66 def default_language @default_language end |
#iri_to_curie ⇒ Object
Reverse mappings from IRI to a term or CURIE
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# File 'lib/json/ld/evaluation_context.rb', line 24 def iri_to_curie @iri_to_curie end |
#iri_to_term ⇒ Object
Reverse mappings from IRI to term only for terms, not CURIEs
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# File 'lib/json/ld/evaluation_context.rb', line 29 def iri_to_term @iri_to_term end |
#languages ⇒ Object
Language coercion
The @language keyword is used to specify language coercion rules for the data. For each key in the map, the key is a String representation of the property for which String values will be coerced and the value is the language to coerce to. If no property-specific language is given, any default language from the context is used.
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# File 'lib/json/ld/evaluation_context.rb', line 59 def languages @languages end |
#mappings ⇒ Object
A list of current, in-scope mappings from term to IRI.
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# File 'lib/json/ld/evaluation_context.rb', line 19 def mappings @mappings end |
#options ⇒ Object
Global options used in generating IRIs
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# File 'lib/json/ld/evaluation_context.rb', line 78 def @options end |
#provided_context ⇒ Object
A context provided to us that we can use without re-serializing
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# File 'lib/json/ld/evaluation_context.rb', line 81 def provided_context @provided_context end |
#vocab ⇒ Object
Default vocabulary
Sets the default vocabulary used for expanding terms which aren’t otherwise absolute IRIs
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# File 'lib/json/ld/evaluation_context.rb', line 74 def vocab @vocab end |
Instance Method Details
#alias(value) ⇒ String
Reverse term mapping, typically used for finding aliases for keys.
Returns either the original value, or a mapping for this value.
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# File 'lib/json/ld/evaluation_context.rb', line 376 def alias(value) iri_to_term.fetch(value, value) end |
#coerce(property) ⇒ RDF::URI, '@id'
Retrieve term coercion
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# File 'lib/json/ld/evaluation_context.rb', line 386 def coerce(property) # Map property, if it's not an RDF::Value # @type and @graph always is an IRI return '@id' if [RDF.type, '@type', '@graph'].include?(property) @coercions.fetch(property, nil) end |
#compact_iri(iri, options = {}) ⇒ String
Compact an IRI
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# File 'lib/json/ld/evaluation_context.rb', line 509 def compact_iri(iri, = {}) depth() do debug {"compact_iri(#{iri.inspect}, #{.inspect})"} value = .fetch(:value, nil) # Get a list of terms which map to iri terms = mappings.keys.select {|t| mapping(t).to_s == iri} # Create an association term map for terms to their associated # term rank. term_map = {} # If value is a @list add a term rank for each # term mapping to iri which has @container @list. debug("compact_iri", "#{value.inspect} is a list? #{list?(value).inspect}") if list?(value) list_terms = terms.select {|t| container(t) == '@list'} term_map = list_terms.inject({}) do |memo, t| memo[t] = term_rank(t, value) memo end unless list_terms.empty? debug("term map") {"remove zero rank terms: #{term_map.keys.select {|t| term_map[t] == 0}}"} if term_map.any? {|t,r| r == 0} term_map.delete_if {|t, r| r == 0} end # Otherwise, value is @value or a native type. # Add a term rank for each term mapping to iri # which does not have @container @list if term_map.empty? non_list_terms = terms.reject {|t| container(t) == '@list'} # If value is a @list, exclude from term map those terms # with @container @set non_list_terms.reject {|t| container(t) == '@set'} if list?(value) term_map = non_list_terms.inject({}) do |memo, t| memo[t] = term_rank(t, value) memo end unless non_list_terms.empty? debug("term map") {"remove zero rank terms: #{term_map.keys.select {|t| term_map[t] == 0}}"} if term_map.any? {|t,r| r == 0} term_map.delete_if {|t, r| r == 0} end # If we don't want terms, remove anything that's not a CURIE or IRI term_map.keep_if {|t, v| t.index(':') } if .fetch(:not_term, false) # Find terms having the greatest term match value least_distance = term_map.values.max terms = term_map.keys.select {|t| term_map[t] == least_distance} # If terms is empty, and the active context has a @vocab which is a # prefix of iri where the resulting relative IRI is not a term in the # active context. The resulting relative IRI is the unmatched part of iri. if vocab && terms.empty? && iri.to_s.index(vocab) == 0 terms << iri.to_s.sub(vocab, '') debug("vocab") {"vocab: #{vocab}, rel: #{terms.first}"} end # If terms is empty, add a compact IRI representation of iri for each # term in the active context which maps to an IRI which is a prefix for # iri where the resulting compact IRI is not a term in the active # context. The resulting compact IRI is the term associated with the # partially matched IRI in the active context concatenated with a colon # (:) character and the unmatched part of iri. if terms.empty? debug("curies") {"mappings: #{mappings.inspect}"} curies = mappings.keys.map do |k| debug("curies[#{k}]") {"#{mapping(k).inspect}"} #debug("curies[#{k}]") {"#{(mapping(k).to_s.length > 0).inspect}, #{iri.to_s.index(mapping(k).to_s)}"} iri.to_s.sub(mapping(k).to_s, "#{k}:") if mapping(k).to_s.length > 0 && iri.to_s.index(mapping(k).to_s) == 0 && iri.to_s != mapping(k).to_s end.compact debug("curies") do curies.map do |c| "#{c}: " + "container: #{container(c).inspect}, " + "coerce: #{coerce(c).inspect}, " + "lang: #{language(c).inspect}" end.inspect end terms = curies.select do |curie| container(curie) != '@list' && coerce(curie).nil? && language(curie) == default_language end debug("curies") {"selected #{terms.inspect}"} end # If we still don't have any terms and we're using standard_prefixes, # try those, and add to mapping if terms.empty? && @options[:standard_prefixes] terms = RDF::Vocabulary. select {|v| iri.index(v.to_uri.to_s) == 0}. map do |v| prefix = v.__name__.to_s.split('::').last.downcase set_mapping(prefix, v.to_uri.to_s) iri.sub(v.to_uri.to_s, "#{prefix}:").sub(/:$/, '') end debug("curies") {"using standard prefies: #{terms.inspect}"} end if terms.empty? # If there is a mapping from the complete IRI to null, return null, # otherwise, return the complete IRI. if mappings.has_key?(iri.to_s) && !mapping(iri) debug("iri") {"use nil IRI mapping"} terms << nil else terms << iri.to_s end end # Get the first term based on distance and lexecographical order # Prefer terms that don't have @container @set over other terms, unless as set is true terms = terms.sort do |a, b| debug("term sort") {"c(a): #{container(a).inspect}, c(b): #{container(b)}"} if a.to_s.length == b.to_s.length a.to_s <=> b.to_s else a.to_s.length <=> b.to_s.length end end debug("sorted terms") {terms.inspect} result = terms.first debug {"=> #{result.inspect}"} result end end |
#compact_value(property, value, options = {}) ⇒ Hash
Compact a value
FIXME: revisit the specification version of this.
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# File 'lib/json/ld/evaluation_context.rb', line 773 def compact_value(property, value, = {}) raise ProcessingError::Lossy, "attempt to compact a non-object value: #{value.inspect}" unless value.is_a?(Hash) depth() do debug("compact_value") {"property: #{property.inspect}, value: #{value.inspect}, coerce: #{coerce(property).inspect}"} result = case #when %w(boolean integer double).any? {|t| expand_iri(value['@type'], :position => :datatype) == RDF::XSD[t]} # # Compact native type # debug {" (native)"} # l = RDF::Literal(value['@value'], :datatype => expand_iri(value['@type'], :position => :datatype)) # l.canonicalize.object when coerce(property) == '@id' && value.has_key?('@id') # Compact an @id coercion debug {" (@id & coerce)"} compact_iri(value['@id'], :position => :object) when value['@type'] && (value['@type'], :position => :datatype) == coerce(property) # Compact common datatype debug {" (@type & coerce) == #{coerce(property)}"} value['@value'] when value.has_key?('@id') # Compact an IRI value[self.alias('@id')] = compact_iri(value['@id'], :position => :object) debug {" (#{self.alias('@id')} => #{value['@id']})"} value when value['@language'] && value['@language'] == language(property) # Compact language debug {" (@language) == #{language(property).inspect}"} value['@value'] when value['@value'] && !value['@value'].is_a?(String) # Compact simple literal to string debug {" (@value not string)"} value['@value'] when value['@value'] && !value['@language'] && !value['@type'] && !coerce(property) && !default_language # Compact simple literal to string debug {" (@value && !@language && !@type && !coerce && !language)"} value['@value'] when value['@value'] && !value['@language'] && !value['@type'] && !coerce(property) && !language(property) # Compact simple literal to string debug {" (@value && !@language && !@type && !coerce && language(property).false)"} value['@value'] when value['@type'] # Compact datatype debug {" (@type)"} value[self.alias('@type')] = compact_iri(value['@type'], :position => :datatype) value else # Otherwise, use original value debug {" (no change)"} value end # If the result is an object, tranform keys using any term keyword aliases if result.is_a?(Hash) && result.keys.any? {|k| self.alias(k) != k} debug {" (map to key aliases)"} new_element = {} result.each do |k, v| new_element[self.alias(k)] = v end result = new_element end debug {"=> #{result.inspect}"} result end end |
#container(property) ⇒ String
Retrieve container mapping, add it if ‘value` is provided
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# File 'lib/json/ld/evaluation_context.rb', line 414 def container(property) @containers.fetch(property.to_s, nil) end |
#dup ⇒ Object
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# File 'lib/json/ld/evaluation_context.rb', line 850 def dup # Also duplicate mappings, coerce and list ec = super ec.mappings = mappings.dup ec.coercions = coercions.dup ec.containers = containers.dup ec.languages = languages.dup ec.default_language = default_language ec. = ec.iri_to_term = iri_to_term.dup ec.iri_to_curie = iri_to_curie.dup ec end |
#expand_iri(iri, options = {}) ⇒ RDF::URI, String
Expand an IRI. Relative IRIs are expanded against any document base.
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# File 'lib/json/ld/evaluation_context.rb', line 474 def (iri, = {}) return iri unless iri.is_a?(String) prefix, suffix = iri.split(':', 2) return mapping(iri) if mapping(iri) # If it's an exact match debug("expand_iri") {"prefix: #{prefix.inspect}, suffix: #{suffix.inspect}, vocab: #{vocab.inspect}"} unless [:quiet] base = self.base unless [:predicate, :datatype].include?([:position]) prefix = prefix.to_s case when prefix == '_' && suffix then bnode(suffix) when iri.to_s[0,1] == "@" then iri when suffix.to_s[0,2] == '//' then uri(iri) when mappings.has_key?(prefix) then uri(mappings[prefix] + suffix.to_s) when base then base.join(iri) when vocab then uri("#{vocab}#{iri}") else # Otherwise, it must be an absolute IRI u = uri(iri) u if u.absolute? || [:subject, :object].include?([:position]) end end |
#expand_value(property, value, options = {}) ⇒ Hash
Expand a value from compacted to expanded form making the context unnecessary. This method is used as part of more general expansion and operates on RHS values, using a supplied key to determine @type and @container coercion rules.
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# File 'lib/json/ld/evaluation_context.rb', line 662 def (property, value, = {}) = {:native => true}.merge() depth() do debug("expand_value") {"property: #{property.inspect}, value: #{value.inspect}, coerce: #{coerce(property).inspect}"} value = RDF::Literal(value) if RDF::Literal(value).has_datatype? dt = case value when RDF::Literal case value.datatype when RDF::XSD.boolean, RDF::XSD.integer, RDF::XSD.double then value.datatype else value end when RDF::Term then value.class.name else value end result = case dt when RDF::XSD.boolean debug("xsd:boolean") case coerce(property) when RDF::XSD.double.to_s {"@value" => value.to_s, "@type" => RDF::XSD.double.to_s} else if [:native] # Unless there's coercion, to not modify representation {"@value" => (value.is_a?(RDF::Literal::Boolean) ? value.object : value)} else {"@value" => value.to_s, "@type" => RDF::XSD.boolean.to_s} end end when RDF::XSD.integer debug("xsd:integer") case coerce(property) when RDF::XSD.double.to_s {"@value" => RDF::Literal::Double.new(value, :canonicalize => true).to_s, "@type" => RDF::XSD.double.to_s} when RDF::XSD.integer.to_s, nil # Unless there's coercion, to not modify representation if [:native] {"@value" => value.is_a?(RDF::Literal::Integer) ? value.object : value} else {"@value" => value.to_s, "@type" => RDF::XSD.integer.to_s} end else res = Hash.ordered res['@value'] = value.to_s res['@type'] = coerce(property) res end when RDF::XSD.double debug("xsd:double") case coerce(property) when RDF::XSD.integer.to_s {"@value" => value.to_int.to_s, "@type" => RDF::XSD.integer.to_s} when RDF::XSD.double.to_s {"@value" => RDF::Literal::Double.new(value, :canonicalize => true).to_s, "@type" => RDF::XSD.double.to_s} when nil if [:native] # Unless there's coercion, to not modify representation {"@value" => value.is_a?(RDF::Literal::Double) ? value.object : value} else {"@value" => RDF::Literal::Double.new(value, :canonicalize => true).to_s, "@type" => RDF::XSD.double.to_s} end else res = Hash.ordered res['@value'] = value.to_s res['@type'] = coerce(property) res end when "RDF::URI", "RDF::Node" debug("URI | BNode") { value.to_s } {'@id' => value.to_s} when RDF::Literal debug("Literal") res = Hash.ordered res['@value'] = value.to_s res['@type'] = value.datatype.to_s if value.has_datatype? res['@language'] = value.language.to_s if value.has_language? res else debug("else") case coerce(property) when '@id' {'@id' => (value, :position => :object).to_s} when nil debug("expand value") {"lang(prop): #{language(property).inspect}, def: #{default_language.inspect}"} language(property) ? {"@value" => value.to_s, "@language" => language(property)} : {"@value" => value.to_s} else res = Hash.ordered res['@value'] = value.to_s res['@type'] = coerce(property).to_s res end end debug {"=> #{result.inspect}"} result end end |
#inspect ⇒ Object
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# File 'lib/json/ld/evaluation_context.rb', line 840 def inspect v = %w([EvaluationContext) v << "def_language=#{default_language}" v << "languages[#{languages.keys.length}]=#{languages}" v << "mappings[#{mappings.keys.length}]=#{mappings}" v << "coercions[#{coercions.keys.length}]=#{coercions}" v << "containers[#{containers.length}]=#{containers}" v.join(", ") + "]" end |
#language(property) ⇒ String
Retrieve the language associated with a property, or the default language otherwise
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# File 'lib/json/ld/evaluation_context.rb', line 437 def language(property) @languages.fetch(property.to_s, @default_language) if !coerce(property) end |
#mapping(term) ⇒ RDF::URI, String
Retrieve term mapping
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# File 'lib/json/ld/evaluation_context.rb', line 343 def mapping(term) @mappings.fetch(term.to_s, nil) end |
#parse(context) ⇒ Object
Create an Evaluation Context using an existing context as a start by parsing the input.
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# File 'lib/json/ld/evaluation_context.rb', line 117 def parse(context) case context when nil EvaluationContext.new when EvaluationContext debug("parse") {"context: #{context.inspect}"} context.dup when IO, StringIO debug("parse") {"io: #{context}"} # Load context document, if it is a string begin ctx = JSON.load(context) parse(ctx["@context"] || {}) rescue JSON::ParserError => e debug("parse") {"Failed to parse @context from remote document at #{context}: #{e.}"} raise JSON::LD::InvalidContext::Syntax, "Failed to parse remote context at #{context}: #{e.}" if @options[:validate] self.dup end when String, nil debug("parse") {"remote: #{context}"} # Load context document, if it is a string ec = nil begin RDF::Util::File.open_file(context.to_s) {|f| ec = parse(f)} ec.provided_context = context debug("parse") {"=> provided_context: #{context.inspect}"} ec rescue Exception => e debug("parse") {"Failed to retrieve @context from remote document at #{context}: #{e.}"} raise JSON::LD::InvalidContext::LoadError, "Failed to parse remote context at #{context}: #{e.}", e.backtrace if @options[:validate] self.dup end when Array # Process each member of the array in order, updating the active context # Updates evaluation context serially during parsing debug("parse") {"Array"} ec = self context.each {|c| ec = ec.parse(c)} ec.provided_context = context debug("parse") {"=> provided_context: #{context.inspect}"} ec when Hash new_ec = self.dup new_ec.provided_context = context.dup { '@language' => :default_language=, '@vocab' => :vocab= }.each do |key, setter| v = context.fetch(key, false) if v.nil? || v.is_a?(String) context.delete(key) debug("parse") {"Hash[#{key}] = #{v.inspect}"} new_ec.send(setter, v) elsif v raise InvalidContext::Syntax, "#{key.inspect} is invalid" end end num_updates = 1 while num_updates > 0 do num_updates = 0 # Map terms to IRIs/keywords first context.each do |key, value| # Expand a string value, unless it matches a keyword debug("parse") {"Hash[#{key}] = #{value.inspect}"} if KEYWORDS.include?(key) raise InvalidContext::Syntax, "key #{key.inspect} must not be a keyword" elsif term_valid?(key) # Remove all coercion information for the property new_ec.set_coerce(key, nil) new_ec.set_container(key, nil) @languages.delete(key) # Extract IRI mapping. This is complicated, as @id may have been aliased value = value.fetch('@id', nil) if value.is_a?(Hash) raise InvalidContext::Syntax, "unknown mapping for #{key.inspect} to #{value.class}" unless value.is_a?(String) || value.nil? iri = new_ec.(value, :position => :predicate) if value.is_a?(String) if iri && new_ec.mappings.fetch(key, nil) != iri # Record term definition new_ec.set_mapping(key, iri) num_updates += 1 elsif value.nil? new_ec.set_mapping(key, nil) end else raise InvalidContext::Syntax, "key #{key.inspect} is invalid" end end end # Next, look for coercion using new_ec context.each do |key, value| # Expand a string value, unless it matches a keyword debug("parse") {"coercion/list: Hash[#{key}] = #{value.inspect}"} case value when Hash # Must have one of @id, @language, @type or @container raise InvalidContext::Syntax, "mapping for #{key.inspect} missing one of @id, @language, @type or @container" if (%w(@id @language @type @container) & value.keys).empty? value.each do |key2, value2| iri = new_ec.(value2, :position => :predicate) if value2.is_a?(String) case key2 when '@type' raise InvalidContext::Syntax, "unknown mapping for '@type' to #{value2.class}" unless value2.is_a?(String) || value2.nil? if new_ec.coerce(key) != iri raise InvalidContext::Syntax, "unknown mapping for '@type' to #{iri.inspect}" unless RDF::URI(iri).absolute? || iri == '@id' # Record term coercion new_ec.set_coerce(key, iri) end when '@container' raise InvalidContext::Syntax, "unknown mapping for '@container' to #{value2.class}" unless %w(@list @set).include?(value2) if new_ec.container(key) != value2 debug("parse") {"container #{key.inspect} as #{value2.inspect}"} new_ec.set_container(key, value2) end when '@language' if !new_ec.languages.has_key?(key) || new_ec.languages[key] != value2 debug("parse") {"language #{key.inspect} as #{value2.inspect}"} new_ec.set_language(key, value2) end end end # If value has no @id, create a mapping from key # to the expanded key IRI unless value.has_key?('@id') iri = new_ec.(key, :position => :predicate) new_ec.set_mapping(key, iri) end when nil, String # handled in previous loop else raise InvalidContext::Syntax, "attempt to map #{key.inspect} to #{value.class}" end end new_ec end end |
#serialize(options = {}) ⇒ Hash
Generate @context
If a context was supplied in global options, use that, otherwise, generate one from this representation.
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# File 'lib/json/ld/evaluation_context.rb', line 268 def serialize( = {}) depth() do use_context = if provided_context debug "serlialize: reuse context: #{provided_context.inspect}" provided_context else debug("serlialize: generate context") debug {"=> context: #{inspect}"} ctx = Hash.ordered ctx['@language'] = default_language.to_s if default_language ctx['@vocab'] = vocab.to_s if vocab # Mappings mappings.keys.sort{|a, b| a.to_s <=> b.to_s}.each do |k| next unless term_valid?(k.to_s) debug {"=> mappings[#{k}] => #{mappings[k]}"} ctx[k] = mappings[k].to_s end unless coercions.empty? && containers.empty? && languages.empty? # Coerce (coercions.keys + containers.keys + languages.keys).uniq.sort.each do |k| next if k == '@type' # Turn into long form ctx[k] ||= Hash.ordered if ctx[k].is_a?(String) defn = Hash.ordered defn["@id"] = compact_iri(ctx[k], :position => :subject, :not_term => true) ctx[k] = defn end debug {"=> coerce(#{k}) => #{coerce(k)}"} if coerce(k) && !NATIVE_DATATYPES.include?(coerce(k)) dt = coerce(k) dt = compact_iri(dt, :position => :datatype) unless dt == '@id' # Fold into existing definition ctx[k]["@type"] = dt debug {"=> datatype[#{k}] => #{dt}"} end debug {"=> container(#{k}) => #{container(k)}"} if %w(@list @set).include?(container(k)) ctx[k]["@container"] = container(k) debug {"=> container[#{k}] => #{container(k).inspect}"} end debug {"=> language(#{k}) => #{language(k)}"} if language(k) != default_language ctx[k]["@language"] = language(k) ? language(k) : nil debug {"=> language[#{k}] => #{language(k).inspect}"} end # Remove an empty definition ctx.delete(k) if ctx[k].empty? end end debug {"start_doc: context=#{ctx.inspect}"} ctx end # Return hash with @context, or empty r = Hash.ordered r['@context'] = use_context unless use_context.nil? || use_context.empty? r end end |
#set_coerce(property, value) ⇒ RDF::URI, '@id'
Set term coercion
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# File 'lib/json/ld/evaluation_context.rb', line 400 def set_coerce(property, value) debug {"coerce #{property.inspect} to #{value.inspect}"} unless @coercions[property.to_s] == value if value @coercions[property] = value else @coercions.delete(property) end end |
#set_container(property, value) ⇒ Boolean
Set container mapping
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# File 'lib/json/ld/evaluation_context.rb', line 424 def set_container(property, value) return if @containers[property.to_s] == value debug {"coerce #{property.inspect} to #{value.inspect}"} if value @containers[property.to_s] = value else @containers.delete(value) end end |
#set_language(property, value) ⇒ String
Set language mapping
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# File 'lib/json/ld/evaluation_context.rb', line 447 def set_language(property, value) # Use false for nil language @languages[property.to_s] = value ? value : false end |
#set_mapping(term, value) ⇒ RDF::URI, String
Set term mapping
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# File 'lib/json/ld/evaluation_context.rb', line 354 def set_mapping(term, value) term = term.to_s term_sym = term.empty? ? "" : term.to_sym # raise InvalidContext::Syntax, "mapping term #{term.inspect} must be a string" unless term.is_a?(String) # raise InvalidContext::Syntax, "mapping value #{value.inspect} must be an RDF::URI" unless value.nil? || value.to_s[0,1] == '@' || value.is_a?(RDF::URI) debug {"map #{term.inspect} to #{value.inspect}"} iri_to_term.delete(@mappings[term].to_s) if @mappings[term] @mappings[term] = value @options[:prefixes][term_sym] = value if @options.has_key?(:prefixes) iri_to_term[value.to_s] = term end |
#term_valid?(term) ⇒ Boolean
Determine if ‘term` is a suitable term. Term may be any valid JSON string.
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# File 'lib/json/ld/evaluation_context.rb', line 458 def term_valid?(term) term.is_a?(String) end |