Class: DataMapper::Adapters::XmlAdapter

Inherits:
AbstractAdapter
  • Object
show all
Defined in:
lib/dm-xml-adapter.rb

Instance Method Summary collapse

Constructor Details

#initialize(name, options) ⇒ XmlAdapter

Returns a new instance of XmlAdapter.



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# File 'lib/dm-xml-adapter.rb', line 61

def initialize(name, options)
  super

  @options = Hash.new
  @options[:directory] = options[:directory]
  @options[:directory] ||= './db'         
   
  @last_used_id = Hash.new
  
  @cache = XmlAdapterCache.new
 
end

Instance Method Details

#create(resources) ⇒ Object 



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# File 'lib/dm-xml-adapter.rb', line 82

def create(resources) 
  resources.each do |resource|
    model = resource.model
    id = find_free_id_for(resource.class.to_s)
    # find name of key attribute
    key = model.key.first.name
    resource.attributes[key] = id
    resource.instance_variable_set("@" + key.to_s, id)
    save(resource)
  end
  return resources.size
end

#create_model_storage(repository, model) ⇒ Object 



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# File 'lib/dm-xml-adapter.rb', line 78

def create_model_storage(repository, model)
 FileUtils.mkdir_p(classname_to_dir(model.to_s))
end

#delete(collection) ⇒ Object 



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# File 'lib/dm-xml-adapter.rb', line 95

def delete(collection)
 collection.each do |result|
    key = result.key.first
    class_name = result.model.to_s
    @last_used_id[class_name] = key
  xml_destroy(result)
  # also remove from cache
  @cache.delete(class_name, key)
  # also remove from mtimes
  @cache.delete_mtime(class_name_to_file(class_name, key))
 end
 return collection.size
end

#destroy_model_storage(repository, model) ⇒ Object 



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# File 'lib/dm-xml-adapter.rb', line 74

def destroy_model_storage(repository, model)
 FileUtils.rm_rf(classname_to_dir(model.to_s))
end

#read(query) ⇒ Object 



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# File 'lib/dm-xml-adapter.rb', line 125

def read(query)
 return filter_result_set(get_all(query.model), query)
end

#update(attributes, collection) ⇒ Object 



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# File 'lib/dm-xml-adapter.rb', line 109

def update(attributes, collection)
 # ok, for each object found we have to update the attribs we found
 # first thing is figure out what class we are dealing with
 # iterate over every object in this set and set the given attributes
 collection.each do |obj|
  attributes.each do |attrib|
   # attrib is an array
   # first member is Property object
   # second member is the value
   obj.instance_variable_set("@" + attrib[0].name.to_s, attrib[1])
  end
  save(obj)
 end
  return collection
end