Class: Cheri::Builder::Context::ConnectionMinder

Inherits:
Object
  • Object
show all
Defined in:
lib/cheri/builder/context.rb

Overview

We want to prevent built objects passed as parameters from being dynamically connected, since presumably the method/ctor being called will do whatever is needed (except for cherify, which wants its arg connected). Note that we can only catch those passed to cheri-invoked ctors/methods.

Defined Under Namespace

Classes: Conn

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ConnectionMinder

:nodoc: all



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# File 'lib/cheri/builder/context.rb', line 639

def initialize
  @c = {} # pending connections. indexed by builder.__id__
  #@a = {} # pending 'any' connections. indexed by builder.__id__
  @o = {} # pending builder(object)s. indexed by object.__id__
end

Instance Method Details

#ck(y, *r) ⇒ Object Also known as: check

check args passed to ctors/methods against the pending objects hash, and remove any matches from the pending connections/objects hashes.



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# File 'lib/cheri/builder/context.rb', line 689

def ck(y,*r)
  unless r.empty? || y == :cheri_yield || y == :cherify
    o = @o
    r.each do |a|
      if (b = o[a.__id__])
        cs = @c[b.__id__]
        cs.reverse_each do |c|
          if a.equal?(c.obj)
            cs.delete(c)
            o.delete(a.__id__)
          end
        end
      end
    end
    if Hash === r.last
      r.last.each_value do |a|
        if (b = o[a.__id__])
          cs = @c[b.__id__]
          cs.reverse_each do |c|
            if a.equal?(c.obj)
              cs.delete(c)
              o.delete(a.__id__)
            end
          end
        end
      end
    end     
  end
end

#po(b) ⇒ Object Also known as: popped

a builder has been popped from the stack. connect any pending (prepared) connections, and remove each builder/object associated with a connection from the pending objects hash.



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# File 'lib/cheri/builder/context.rb', line 655

def po(b)
  if @a && (ac = @a.delete b.__id__)
    ac.each do |c|
      c.connect rescue nil
    end
  end
  if (cs = @c.delete b.__id__)
    begin
      cs.each do |c| c.connect; end
    ensure
      o = @o
      cs.each do |c| o.delete c.obj.__id__; end
    end    
  end
end

#ppd(ctr, bldr, obj, sym, props = nil) ⇒ Object Also known as: prepared

store a prepared connection.



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# File 'lib/cheri/builder/context.rb', line 673

def ppd(ctr,bldr,obj,sym,props=nil)
  @o[obj.__id__] = bldr
  @c[bldr.__id__] << Conn.new(ctr,bldr.object,obj,sym,props)
  true
end

#ppda(ctr, bldr, obj, sym, props = nil) ⇒ Object Also known as: prepared_any

store a prepared ‘any’ connection.



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# File 'lib/cheri/builder/context.rb', line 681

def ppda(ctr,bldr,obj,sym,props=nil)
  ((@a ||= {})[bldr.__id__] ||= []) << Conn.new(ctr,bldr.object,obj,sym,props)
  true
end

#pu(b) ⇒ Object Also known as: pushed

a builder has been pushed onto the stack. create an array to hold pending connections for that builder



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# File 'lib/cheri/builder/context.rb', line 647

def pu(b)
  @c[b.__id__] = []
end