Class: Context::Bridge
Overview
This class is used to specify the namespace for a symbol according to a priority list. When you create the Bridge you initialize it either with a single module name, or an array of module names. Calling “bridge.symbol” will return the class in desired namespace (or nil if it doesn’t exist) If the Bridge was initialized with an array, it will pick the first namespace that evaluates the symbol into something that actually exists.
Instance Method Summary collapse
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#classExists?(mod, symbol) ⇒ Boolean
Returns true if the mod and symbol evaluate to a class in the system.
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#evalClass(mod, symbol) ⇒ Object
Evaluate the module and symbol, returning the class.
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#initialize(mods) ⇒ Bridge
constructor
Takes either a module name, or an array of module names.
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#method_missing(symbol) ⇒ Object
Return the class specified by the stored module and the symbol If an array of modules was stored, walk through them and pick the first one that creates an extant class.
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#symbolToS(mod, symbol) ⇒ Object
Convert the module name and symbol to a string.
Constructor Details
#initialize(mods) ⇒ Bridge
Takes either a module name, or an array of module names
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# File 'lib/Context/Bridge.rb', line 16 def initialize(mods) if mods.class != Array @mod = mods @mods = nil else @mods = mods @mod = nil end end |
Dynamic Method Handling
This class handles dynamic methods through the method_missing method
#method_missing(symbol) ⇒ Object
Return the class specified by the stored module and the symbol If an array of modules was stored, walk through them and pick the first one that creates an extant class.
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# File 'lib/Context/Bridge.rb', line 49 def method_missing(symbol) if !@mod.nil? @mod.class_eval(symbol.to_s) elsif !@mods.nil? mod = @mods.find do |mod| classExists?(mod, symbol) end evalClass(mod, symbol) else nil end end |
Instance Method Details
#classExists?(mod, symbol) ⇒ Boolean
Returns true if the mod and symbol evaluate to a class in the system.
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# File 'lib/Context/Bridge.rb', line 42 def classExists?(mod, symbol) symbolToS(mod, symbol).eql?(evalClass(mod, symbol).to_s) end |
#evalClass(mod, symbol) ⇒ Object
Evaluate the module and symbol, returning the class. If it doesn’t exist, return nil
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# File 'lib/Context/Bridge.rb', line 33 def evalClass(mod, symbol) begin mod.unless_nil do class_eval(symbol.to_s) end rescue nil end end |
#symbolToS(mod, symbol) ⇒ Object
Convert the module name and symbol to a string
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# File 'lib/Context/Bridge.rb', line 27 def symbolToS(mod, symbol) mod.to_s + "::" + symbol.to_s end |