Class: SuperStack::Manager

Inherits:
Object
  • Object
show all
Includes:
SuperStack::MergePolicies::PolicyHandler
Defined in:
lib/super_stack/manager.rb

Constant Summary collapse

DEFAULT_PRIORITY_INTERVAL = 
10
DEFAULT_MERGE_POLICY = 
SuperStack::MergePolicies::StandardMergePolicy

Instance Attribute Summary collapse

Attributes included from SuperStack::MergePolicies::PolicyHandler

#merge_policy

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Manager

Returns a new instance of Manager.



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# File 'lib/super_stack/manager.rb', line 13

def initialize
  @layers = {}
  self.default_merge_policy = DEFAULT_MERGE_POLICY
end

Instance Attribute Details

#layers ⇒ Object (readonly)

Returns the value of attribute layers.



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# File 'lib/super_stack/manager.rb', line 11

def layers
  @layers
end

#write_layer ⇒ Object

Returns the value of attribute write_layer.



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# File 'lib/super_stack/manager.rb', line 11

def write_layer
  @write_layer
end

Instance Method Details

#<<(layer) ⇒ Object 



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# File 'lib/super_stack/manager.rb', line 63

def <<(layer)
  add_layer layer
end

#[](filter = nil) ⇒ Object 



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# File 'lib/super_stack/manager.rb', line 34

def [](filter=nil)
  layers = to_a
  return [] if layers.empty?
  return layers[0] if layers.count == 1
  first_layer = layers.shift
  res = layers.inject(first_layer) do |stack, layer|
    policy_to_apply = layer.merge_policy.nil? ? default_merge_policy : layer.merge_policy
    policy_to_apply.merge stack, layer
  end
  if filter.nil?
    res
  else
    res[filter]
  end
end

#[]=(key, value) ⇒ Object 



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# File 'lib/super_stack/manager.rb', line 29

def []=(key,value)
  raise 'No write layer specified' if write_layer.nil?
  write_layer[key] = value
end

#add_layer(layer) ⇒ Object 



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# File 'lib/super_stack/manager.rb', line 54

def add_layer(layer)
  if layer.is_a? Hash and not layer.class.included_modules.include? SuperStack::LayerWrapper
    SuperStack::LayerWrapper.from_hash layer
  end
  set_valid_name_for layer if layers.keys.include? layer.name
  layer.priority = get_unused_priority if layer.priority.nil?
  layers[layer.name] = layer
end

#reload_layers ⇒ Object 



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# File 'lib/super_stack/manager.rb', line 67

def reload_layers
  layers.values.each &:reload
end

#to_a ⇒ Object 



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# File 'lib/super_stack/manager.rb', line 50

def to_a
  layers.values.sort
end