Class: OpenWFE::FlowDict

Inherits:
Object
  • Object
show all
Defined in:
lib/openwfe/util/dollar.rb

Overview

Wrapping a process expression and the current workitem as a Hash object ready for lookup at substitution time.

Instance Method Summary collapse

Constructor Details

#initialize(flow_expression, workitem, default_prefix = 'v') ⇒ FlowDict

Returns a new instance of FlowDict.



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# File 'lib/openwfe/util/dollar.rb', line 73

def initialize (flow_expression, workitem, default_prefix='v')

    @flow_expression = flow_expression
    @workitem = workitem
    @default_prefix = default_prefix
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/openwfe/util/dollar.rb', line 80

def [] (key)

    p, k = extract_prefix(key)

    #puts "### p, k is '#{p}', '#{k}'"

    return '' if k == ''

    return @workitem.lookup_attribute(k) if p == 'f'

    if p == 'v'
        return '' unless @flow_expression
        return @flow_expression.lookup_variable(k)
    end

    #return call_function(k) if p == 'c'
    return call_ruby(k) if p == 'r'

    @workitem.lookup_attribute key
end

#[]=(key, value) ⇒ Object 



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# File 'lib/openwfe/util/dollar.rb', line 101

def []= (key, value)

    pr, k = extract_prefix(key)

    if pr == 'f'

        @workitem.set_attribute k, value

    elsif @flow_expression

        @flow_expression.set_variable k, value
    end
end

#has_key?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/openwfe/util/dollar.rb', line 115

def has_key? (key)

    p, k = extract_prefix(key)

    return false if k == ''

    return @workitem.has_attribute?(k) if p == 'f'

    if p == 'v'
        return false unless @flow_expression
        return (@flow_expression.lookup_variable(k) != nil)
    end

    #return true if p == 'c'
    return true if p == 'r'

    @workitem.has_attribute?(key)
end