Class: Muxml::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/muxml/base.rb,
lib/muxml/relation.rb

Defined Under Namespace

Modules: Relation

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(document = nil, element = nil) ⇒ Base

Returns a new instance of Base.



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# File 'lib/muxml/base.rb', line 9

def initialize(document = nil, element = nil)
  if @@xml_files.has_key?(self.class)
    document = @@xml_files[self.class][:file].to_s
    element = @@xml_files[self.class][:root]
  end

  case document
  when String
    xml = REXML::Document.new File.new(document)
  when REXML::Element
    xml = document
  else
    raise ArgumentError, 'invalid element'
  end

  unless element.nil?
    @xml = xml.elements[element]
  else
    @xml = xml
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(sym, *args, &block) ⇒ Object

for call attributes of xml just prefix with attribute_

Raises:

  • (NoMethodError) 


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# File 'lib/muxml/base.rb', line 32

def method_missing(sym, *args, &block)
  if sym.to_s.start_with?('attribute_')
    attribute = sym.to_s.sub(/^attribute_/, '')
    return @xml.attributes[attribute]
  elsif @@relations.has_key?(self.class)
    if @@relations[self.class][:many].has_key?(sym)
      return Relation::Many.new(self, sym, @@relations[self.class][:many][sym].dup)
    elsif @@relations[self.class][:one].has_key?(sym)
      return Relation::One.new(self, sym, @@relations[self.class][:one][sym].dup)
    end
  end
  raise NoMethodError, "undefined method `#{sym}' for #{self}"
end

Instance Attribute Details

#xml ⇒ Object (readonly)

Returns the value of attribute xml.



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# File 'lib/muxml/base.rb', line 5

def xml
  @xml
end

Class Method Details

.has_many(relation, options) ⇒ Object 



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# File 'lib/muxml/base.rb', line 51

def has_many(relation, options)
  @@relations[self] ||= {many: {}, one: {} }
  @@relations[self][:many][relation] = options
end

.has_one(relation, options) ⇒ Object 



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# File 'lib/muxml/base.rb', line 56

def has_one(relation, options)
  @@relations[self] ||= {many: {}, one: {} }
  @@relations[self][:one][relation] = options
end

.xml_document(file, root) ⇒ Object 



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# File 'lib/muxml/base.rb', line 47

def xml_document(file, root)
  @@xml_files[self] = {file: file, root: root}
end