Class: Codec::Field

Inherits:
Object
  • Object
show all
Defined in:
lib/codec/field.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id = "*", value = "") ⇒ Field

Returns a new instance of Field.



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# File 'lib/codec/field.rb', line 12

def initialize(id="*",value="")
  @id = (id.nil? ? "*" : id)
  @value = value
end

Instance Attribute Details

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/codec/field.rb', line 144

def id
  @id
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/codec/field.rb', line 144

def value
  @value
end

Class Method Details

.from_array(id, fields_array) ⇒ Object 



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# File 'lib/codec/field.rb', line 21

def self.from_array(id,fields_array)
  f = Field.new(id,fields_array)  
  return f
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/codec/field.rb', line 26

def ==(other)
  (@id == other.id && @value == other.value)
end

#add_sub_field(sf) ⇒ Object 



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# File 'lib/codec/field.rb', line 64

def add_sub_field(sf)
  @value = [] if @value == ""
 raise "Add sub field impossible on #{@value.class} value class" unless @value.kind_of? Array
 @value << [sf.id,sf.value]
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/codec/field.rb', line 17

def empty?
  return true if @value == ""
end

#eql?(other) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/codec/field.rb', line 30

def eql?(other)
  self == other
end

#get_deep_field(path, separator = '.') ⇒ Object 



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# File 'lib/codec/field.rb', line 85

def get_deep_field(path,separator='.')
	get_sf_recursivly(path.split(separator))
end

#get_id ⇒ Object 



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# File 'lib/codec/field.rb', line 38

def get_id ; @id; end

#get_sf_recursivly(ids) ⇒ Object 



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# File 'lib/codec/field.rb', line 70

def get_sf_recursivly(ids)
	if(ids.size == 1 && @value.kind_of?(Array))
		return get_sub_field(ids.first)
	elsif (ids.size > 1 && @value.kind_of?(Array))
		id = ids.slice!(0)
		return get_sub_field(id).get_sf_recursivly(ids)
	else
		return NilField.new
	end
end

#get_sub_field(id) ⇒ Object 



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# File 'lib/codec/field.rb', line 119

def get_sub_field(id)
 sf_rec = get_sub_fields(id)
 if sf_rec.nil?
   return NilField.new
 elsif sf_rec.size > 1
   raise MultipleFieldError 
 else 
  return sf_rec.first
 end
end

#get_sub_fields(id) ⇒ Object 



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# File 'lib/codec/field.rb', line 130

def get_sub_fields(id)
 raise "Error No Subfield" unless @value.kind_of? Array
 sf_rec = @value.select{|v| v.first == id}.collect{|v| v.last}
  if sf_rec == []
    return NilField.new
  elsif sf_rec.size == 1
    return [Field.new(id,sf_rec.first)]
  else 
    sfs = []
    sf_rec.each{|v| sfs << Field.new(id,v)}
    return sfs
  end
end

#get_value ⇒ Object 



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# File 'lib/codec/field.rb', line 42

def get_value 
  if @value.kind_of?(Array)
    v = []
    @value.each{|id,value|
      v << Field.new(id,value)
    }
    return v
  else
    return @value
  end
end

#hash ⇒ Object 



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# File 'lib/codec/field.rb', line 34

def hash
  @id.hash ^ @value.hash
end

#search(path, separator = '.') ⇒ Object 



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# File 'lib/codec/field.rb', line 81

def search(path,separator='.')
  get_sf_recursivly(path.split(separator))
end

#set_deep_field(sf, path, separator = '.') ⇒ Object 



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# File 'lib/codec/field.rb', line 114

def set_deep_field(sf,path,separator='.')
  @value = set_node(@value,sf.value,path.split(separator))
  self
end

#set_id(id) ⇒ Object 



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# File 'lib/codec/field.rb', line 40

def set_id id ; @id = id ; end

#set_node(value, new_value, path_ids) ⇒ Object 



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# File 'lib/codec/field.rb', line 89

def set_node(value,new_value,path_ids)
  is_set = false
  value = value.collect{|id,val|
    if id != path_ids.first
     [id,val]
    else
      is_set = true
      if path_ids.size == 1
        [id,new_value]
      else
        [id,set_node(val,new_value,path_ids.slice(1,path_ids.size))]
      end
    end
  }
  unless is_set
    if path_ids.size == 1
      value << [path_ids.first,new_value]
    else
      value << [path_ids.first,set_node_rec([],new_value,
        path_ids.slice(1,path_ids.size))]
    end
  end
  return value      
end

#set_value(value, path = nil, separator = ".") ⇒ Object 



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# File 'lib/codec/field.rb', line 54

def set_value(value,path = nil,separator =".")
  if path.nil?
   raise "Error can not set value that is instance of Array" if value.kind_of? Array
    @value = value
  else
    @value = set_node(@value,value,path.split(separator))
  end
  return self
end