Class: Clause

Inherits:
Object
  • Object
show all
Defined in:
lib/enju_biblio/porta_cql.rb

Constant Summary collapse

INDEX = 
/(dpid|dpgroupid|title|creator|publisher|ndc|description|subject|isbn|issn|jpno|from|until|anywhere|porta_type|digitalize_type|webget_type|payment_type|ndl_agent_type|ndlc|itemno)/io
SORT_BY = 
/sortBy/io
RELATION = 
/(=|exact|\^|any|all)/io
MATCH_ALL = 
%w[title creator publisher]
MATCH_EXACT = 
%w[dpid dpgroupid isbn issn jpno porta_type digitalize_type webget_type payment_type ndl_agent_type itemno]
MATCH_PART = 
%w[description subject]
MATCH_AHEAD = 
%w[ndc ndlc]
MATCH_DATE = 
%w[from until]
MATCH_ANYWHERE = 
%w[anywhere]
LOGIC_ALL = 
%w[title creator publisher description subject anywhere]
LOGIC_ANY = 
%w[dpid ndl_agent_type]
LOGIC_EQUAL = 
%w[dpgroupid ndc isbn issn jpno from until porta_type digitalize_type webget_type payment_type ndlc itemno]
MULTIPLE = 
%w[dpid title creator publisher description subject anywhere ndl_agent_type]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(text) ⇒ Clause

Returns a new instance of Clause.



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# File 'lib/enju_biblio/porta_cql.rb', line 116

def initialize(text)
  unless text.empty?
    @index, @relation, @terms = scan(text)
    porta_adapter
    @field = @index
  else
    @index = ''
  end
end

Instance Attribute Details

#index ⇒ Object (readonly)

Returns the value of attribute index.



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# File 'lib/enju_biblio/porta_cql.rb', line 126

def index
  @index
end

#relation ⇒ Object (readonly)

Returns the value of attribute relation.



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# File 'lib/enju_biblio/porta_cql.rb', line 126

def relation
  @relation
end

#terms ⇒ Object (readonly)

Returns the value of attribute terms.



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# File 'lib/enju_biblio/porta_cql.rb', line 126

def terms
  @terms
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/enju_biblio/porta_cql.rb', line 128

def ==(other)
  instance_variables.all? do |val|
    instance_variable_get(val) == other.instance_variable_get(val)
  end
end

#logic_adapter ⇒ Object 



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# File 'lib/enju_biblio/porta_cql.rb', line 168

def logic_adapter
  case
  when LOGIC_ALL.include?(@index)
    raise AdapterError unless %w[ALL ANY = EXACT ^].include?(@relation)
  when LOGIC_ANY.include?(@index)
    raise AdapterError unless %w[ANY =].include?(@relation)
  when LOGIC_EQUAL.include?(@index)
    raise AdapterError unless %w[=].include?(@relation)
  end
end

#multiple_adapter ⇒ Object 



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# File 'lib/enju_biblio/porta_cql.rb', line 179

def multiple_adapter
  unless MULTIPLE.include?(@index)
    raise AdapterError if @terms.size > 1
  end
end

#porta_adapter ⇒ Object 



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# File 'lib/enju_biblio/porta_cql.rb', line 163

def porta_adapter
  logic_adapter
  multiple_adapter
end

#scan(text) ⇒ Object 



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# File 'lib/enju_biblio/porta_cql.rb', line 134

def scan(text)
  ss = StringScanner.new(text)
  index = ''
  relation = ''
  terms = []

  if ss.scan(INDEX) or ss.scan(SORT_BY)
    index = ss[0]
  end
  # else
  #  raise ScannerError, "index or the sortBy is requested in '#{text}'"
  # end
  ss.scan(/\s+/)
  if ss.scan(RELATION)
    relation = ss[0].upcase
  end
  # else
  #  raise ScannerError, "relation is requested in '#{text}'"
  # end
  ss.scan(/\s+/)
  if ss.scan(/.+/)
    terms = ss[0].gsub(/(\A\"|\"\Z)/, '').split
  else
    raise ScannerError, "search term(s) is requested in '#{text}'"
  end

  [index, relation, terms]
end

#to_sunspot ⇒ Object 



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# File 'lib/enju_biblio/porta_cql.rb', line 185

def to_sunspot
  case
  when MATCH_ALL.include?(@index)
    to_sunspot_match_all
  when MATCH_EXACT.include?(@index)
    to_sunspot_match_exact
  when MATCH_PART.include?(@index)
    to_sunspot_match_part
  when MATCH_AHEAD.include?(@index)
    to_sunspot_match_ahead
  when MATCH_ANYWHERE.include?(@index)
    to_sunspot_match_anywhere
  when @index.empty?
    @terms.join(' ')
  end
end

#to_sunspot_match_ahead ⇒ Object 



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# File 'lib/enju_biblio/porta_cql.rb', line 250

def to_sunspot_match_ahead
  "%s_%s:(%s*)" % [@field, :s, @terms.first]
end

#to_sunspot_match_all ⇒ Object 



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# File 'lib/enju_biblio/porta_cql.rb', line 202

def to_sunspot_match_all
  term = @terms.join(' ')
  case @relation
  when /\A=\Z/
    unless /\A\^(.+)/ =~ term
      "%s_%s:(%s)" % [@field, :text, term]
    else
      ahead_tarm = $1.gsub("\s", '').downcase
      "connect_%s_%s:(%s*)" % [@field, :s, ahead_tarm]
    end
  when /\AEXACT\Z/
    "%s_%s:(%s)" % [@field, :sm, term.gsub(' ', '')]
  when /\AANY\Z/
    "%s_%s:(%s)" % [@field, :text, multiple_to_sunspot(@terms, :any)]
  when /\AALL\Z/
    "%s_%s:(%s)" % [@field, :text, multiple_to_sunspot(@terms, :all)]
  else
    raise QuerySyntaxError
  end
end

#to_sunspot_match_anywhere ⇒ Object 



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# File 'lib/enju_biblio/porta_cql.rb', line 254

def to_sunspot_match_anywhere
  case @relation
  when /\A=\Z/
    term = @terms.join(' ')
    "(%s)" % [trim_ahead(term)]
  when /\AANY\Z/
    "(%s)" % [multiple_to_sunspot(@terms, :any)]
  when /\AALL\Z/
    "(%s)" % [multiple_to_sunspot(@terms, :all)]
  else
    raise QuerySyntaxError
  end
end

#to_sunspot_match_exact ⇒ Object 



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# File 'lib/enju_biblio/porta_cql.rb', line 223

def to_sunspot_match_exact
  case @relation
  when /\A=\Z/
    term = @terms.join(' ')
    type = @field != 'issn' ? :sm : :s
    "%s_%s:(%s)" % [@field, type, term]
  when /\AANY\Z/
    "%s_%s:(%s)" % [@field, :sm, multiple_to_sunspot(@terms, :any)]
  else
    raise QuerySyntaxError
  end
end

#to_sunspot_match_part ⇒ Object 



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# File 'lib/enju_biblio/porta_cql.rb', line 236

def to_sunspot_match_part
  case @relation
  when /\A=\Z/
    term = @terms.join(' ')
    "%s_%s:(%s)" % [@field, :text, trim_ahead(term)]
  when /\AANY\Z/
    "%s_%s:(%s)" % [@field, :text, multiple_to_sunspot(@terms, :any)]
  when /\AALL\Z/
    "%s_%s:(%s)" % [@field, :text, multiple_to_sunspot(@terms, :all)]
  else
    raise QuerySyntaxError
  end
end