Class: QDA::Fragment

Inherits:
String
  • Object
show all
Includes:
Coding
Defined in:
lib/weft/document.rb

Direct Known Subclasses

Document

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Coding

#<=>, #end, #exclude, #include?, #intersect, #overlap?, #prepare_args, #touch?, #union

Constructor Details

#initialize(text, doctitle, offset, docid = nil) ⇒ Fragment

Returns a new instance of Fragment.



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# File 'lib/weft/document.rb', line 9

def initialize(text, doctitle, offset, docid = nil)
  super(text)
  unless doctitle.kind_of? String
    raise ArgumentError, 
    "Fragment.new expects a doctitle string, got #{doctitle.inspect}"
  end

  unless offset.kind_of?(Fixnum) && offset >= 0
    raise ArgumentError, 
    "Fragment.new expects an integer offset, got #{offset.inspect}"
  end

  unless docid.nil? || docid.kind_of?(Fixnum)
    raise ArgumentError, 
    "Fragment.new expects an integer docid, got #{docid.inspect}"
  end
  @doctitle = doctitle
  @offset   = offset
  # of the document - duplicates role of doctitle - to fix
  @docid    = docid
end

Instance Attribute Details

#docid ⇒ Object

Returns the value of attribute docid.



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# File 'lib/weft/document.rb', line 7

def docid
  @docid
end

#doctitle ⇒ Object (readonly)

Returns the value of attribute doctitle.



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# File 'lib/weft/document.rb', line 6

def doctitle
  @doctitle
end

#offset ⇒ Object (readonly)

Returns the value of attribute offset.



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# File 'lib/weft/document.rb', line 6

def offset
  @offset
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/weft/document.rb', line 39

def ==(other)
  super(other) and
    @offset == other.offset and
    @doctitle == other.doctitle
end

#[](abs, length) ⇒ Object

returns a fragment from abs (relative to the whole document) that is length long



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# File 'lib/weft/document.rb', line 64

def [](abs, length)
  if abs < self.offset
    raise "Can't get part of non-overlapping string"
  end
  Fragment.new( super(abs - self.offset, length),
                @doctitle, abs, @docid )
end

#coerce(other) ⇒ Object 



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# File 'lib/weft/document.rb', line 49

def coerce(other)
  self.to_code()
end

#complete? ⇒ Boolean

does this code completely cover the document

Returns:

  • (Boolean) 


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# File 'lib/weft/document.rb', line 54

def complete?()
  return NotImplementedError # need to fix
  if @doc.fragments.length == @length + 1
    return true
  end
  return false
end

#inspect ⇒ Object 



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# File 'lib/weft/document.rb', line 79

def inspect()
  str = length < 50 ? self.to_s : self.to_s[0, 50] << '...'
  "<*Fragment #{docid} #{offset}-#{self.end} : '#{str}>"
end

#scan(pattern) ⇒ Object 



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# File 'lib/weft/document.rb', line 72

def scan(pattern)
  super do | m |
    yield Fragment.new(m, @doctitle, 
                       offset + Regexp.last_match.begin(0), @dbid )
  end
end

#text ⇒ Object 



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# File 'lib/weft/document.rb', line 35

def text
  self.to_s()
end

#title ⇒ Object 



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# File 'lib/weft/document.rb', line 31

def title
  @doctitle
end

#to_code ⇒ Object 



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# File 'lib/weft/document.rb', line 45

def to_code()
  Code.new(@docid, offset, length)
end