Class: GraphBuilder::Builder

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ Builder

Returns a new instance of Builder.



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# File 'lib/graph_builder.rb', line 108

def initialize opts = {}
  @cur = @root = Chain.new(nil)
  @logger = opts.delete(:logger)
  @opts = opts # global opts
  debug{"initialize"}
  dump_tree
end

Instance Attribute Details

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/graph_builder.rb', line 106

def logger
  @logger
end

Class Method Details

.build(opts = {}, &proc) ⇒ Object 



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# File 'lib/graph_builder.rb', line 100

def self.build opts={}, &proc
  b = new opts
  proc.call b
  b.send :process
end

Instance Method Details

#add(thing) ⇒ Object

Raises:

  • (InvalidBlockError) 


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# File 'lib/graph_builder.rb', line 116

def add thing
  raise InvalidBlockError if block_given?
  add_thing thing
end

#branch(opts = {}, &proc) ⇒ Object 



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# File 'lib/graph_builder.rb', line 122

def branch opts = {}, &proc ;  node Branch, opts, proc; end

#chain(opts = {}, &proc) ⇒ Object Also known as: with 



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# File 'lib/graph_builder.rb', line 121

def chain  opts = {}, &proc ;  node Chain,  opts, proc; end

#children(opts = {}) ⇒ Object

yield each child of the children of the recent thing



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# File 'lib/graph_builder.rb', line 127

def children opts = {}
  debug{">> children"}
  debug{"children: @cur=#{@cur}, last_things=#{@cur.last_things}"}
  recent_things = [@cur.last_things].flatten
  unless recent_things.size == 1
    raise BuilderError, "invalid recent_thing #{recent_things}, @cur=#{@cur}. children() expects one recent thing"
  end
  recent_thing = recent_things.first
  unless recent_thing.resource
    raise BuilderError, "no resource for recent_thing #{recent_thing}"
  end

  debug{"children: resource=#{recent_thing.resource}"}

  branch opts do
    recent_thing.children.map do |child|
      chain(opts.merge(:resource => child)){ yield child }
    end
  end
  debug{"<< children"}
end

#global_opt(key, value) ⇒ Object

set or get global opt



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# File 'lib/graph_builder.rb', line 156

def global_opt key,value
  if value
    @opts[key] = value
  else
    @opts[key] 
  end
end

#options(opts) ⇒ Object 



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# File 'lib/graph_builder.rb', line 149

def options opts
  res = @opts.merge(@cur.opts).merge(opts)
  debug{"options: opts=#{opts.inspect}, current.opts=#{@cur.opts.inspect}, @opts=#{@opts}, options=#{res.inspect}"}
  res
end