Class: XPath::XPathString

Inherits:
Object
  • Object
show all
Includes:
XPathObject
Defined in:
lib/xml/xpath.rb

Instance Method Summary collapse

Methods included from XPathObject

#**, #<, #<=, #==, #>, #>=, #at, #funcall, #predicate, #to_boolean, #to_number, #to_predicate

Constructor Details

#initialize(str) ⇒ XPathString

Returns a new instance of XPathString.

Raises:

  • (::TypeError) 


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# File 'lib/xml/xpath.rb', line 800

def initialize(str)
  raise ::TypeError, "must be a String" unless str.is_a? String
  @value = str
end

Instance Method Details

#concat(s) ⇒ Object 



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# File 'lib/xml/xpath.rb', line 830

def concat(s)
  @value = @value + s
  self
end

#contain?(s) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/xml/xpath.rb', line 839

def contain?(s)
  /#{Regexp.quote(s)}/ =~ @value
end

#normalize_space ⇒ Object 



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# File 'lib/xml/xpath.rb', line 898

def normalize_space
  @value = @value.strip
  @value.gsub!(/\s+/, ' ')
  self
end

#replace(str) ⇒ Object 



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# File 'lib/xml/xpath.rb', line 914

def replace(str)
  @value = str
  self
end

#size ⇒ Object 



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# File 'lib/xml/xpath.rb', line 894

def size
  @value.gsub(/[^\Wa-zA-Z_\d]/, ' ').size
end

#start_with?(s) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/xml/xpath.rb', line 835

def start_with?(s)
  /\A#{Regexp.quote(s)}/ =~ @value
end

#substring(start, len) ⇒ Object 



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# File 'lib/xml/xpath.rb', line 861

def substring(start, len)
  start = start.round.to_f
  if start.infinite? or start.nan? then
    @value = ''
  elsif len then
    len = len.round.to_f
    maxlen = start + len
    len = maxlen - 1.0 if len >= maxlen
    if start <= 1.0 then
      start = 0
    else
      start = start.to_i - 1
    end
    if len.nan? or len < 1.0 then
      @value = ''
    elsif len.infinite? then
      # @value = @value[start..-1]
      /\A[\W\w]{0,#{start}}/ =~ @value
      @value = $'
    else
      # @value = @value[start, len.to_i]
      /\A[\W\w]{0,#{start}}([\W\w]{0,#{len.to_i}})/ =~ @value
      @value = $1
    end
  elsif start > 1.0 then
    # @value = @value[(start-1)..-1]
    /\A[\W\w]{0,#{start.to_i-1}}/ =~ @value
    @value = $'
  end
  raise "BUG" unless @value
  self
end

#substring_after(s) ⇒ Object 



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# File 'lib/xml/xpath.rb', line 852

def substring_after(s)
  if /#{Regexp.quote(s)}/ =~ @value then
    @value = $'
  else
    @value = ''
  end
  self
end

#substring_before(s) ⇒ Object 



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# File 'lib/xml/xpath.rb', line 843

def substring_before(s)
  if /#{Regexp.quote(s)}/ =~ @value then
    @value = $`
  else
    @value = ''
  end
  self
end

#to_f ⇒ Object 



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# File 'lib/xml/xpath.rb', line 809

def to_f
  if /\A\s*(-?\d+\.?\d*)(?:\s|\z)/ =~ @value then
    $1.to_f
  else
    0.0 / 0.0  # NaN
  end
end

#to_ruby ⇒ Object 



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# File 'lib/xml/xpath.rb', line 821

def to_ruby
  to_str
end

#to_str ⇒ Object 



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# File 'lib/xml/xpath.rb', line 805

def to_str
  @value
end

#to_string(context) ⇒ Object 



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# File 'lib/xml/xpath.rb', line 825

def to_string(context)
  self
end

#translate(from, to) ⇒ Object 



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# File 'lib/xml/xpath.rb', line 904

def translate(from, to)
  to = to.split(//)
  h = {}
  from.split(//).each_with_index { |i,n|
    h[i] = to[n] unless h.key? i
  }
  @value = @value.gsub(/[#{Regexp.quote(h.keys.join)}]/) { |s| h[s] }
  self
end

#true? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/xml/xpath.rb', line 817

def true?
  not @value.empty?
end