Module: OpenWFE::ExpressionTree

Defined in:
lib/openwfe/expool/parser.rb

Overview

A set of methods for manipulating / querying a process expression tree

Class Method Summary collapse

Class Method Details

.get_description(tree) ⇒ Object

Extracts the description out of a process definition tree.

TODO #14964 : add language support here



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# File 'lib/openwfe/expool/parser.rb', line 152

def self.get_description (tree)

    return tree.last.first.to_s if tree.first == 'description'

    tree.last.each do |child|
        d = get_description(child)
        return d if d
    end

    nil
end

.to_code_s(tree, indentation = 0) ⇒ Object

Returns a string containing the ruby code that generated this raw representation tree.



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# File 'lib/openwfe/expool/parser.rb', line 168

def self.to_code_s (tree, indentation = 0)

    s = ""
    tab = "    "
    ind = tab * indentation

    s << ind
    s << OpenWFE::make_safe(tree.first)

    sa = ""
    tree[1].each do |k, v|
        sa << ", :#{OpenWFE::to_underscore(k)} => '#{v}'"
    end
    s << sa[1..-1] if sa.length > 0

    if tree.last.length > 0
        s << " do\n"
        tree.last.each do |child|
            #if child.respond_to?(:to_code_s)
            if child.is_a?(Array) and child.size == 3 # and ...
                s << to_code_s(child, indentation + 1)
            else
                s << ind
                s << tab
                s << "'#{child.to_s}'"
            end
            s << "\n"
        end
        s << ind
        s << "end"
    end

    s
end

.to_s(tree) ⇒ Object 



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# File 'lib/openwfe/expool/parser.rb', line 227

def self.to_s (tree)

    to_xml(tree).to_s
end

.to_xml(tree) ⇒ Object 



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# File 'lib/openwfe/expool/parser.rb', line 203

def self.to_xml (tree)

    elt = REXML::Element.new tree.first

    tree[1].each do |k, v|

        elt.attributes[k] = v
    end

    tree.last.each do |child|

        #if child.kind_of?(SimpleExpRepresentation)
        if child.is_a?(Array) and child.size == 3

            elt << to_xml(child)
        else

            elt << REXML::Text.new(child.to_s)
        end
    end

    elt
end