Class: XMLBuilder::PathParser::Node

Inherits:
Object
  • Object
show all
Defined in:
lib/ec2/amitools/xmlbuilder.rb

Overview

Helper class used by PathParser

Constant Summary collapse

@@attribute_regex =

Regex for parsing path if the form element@attribute where [index] and @attribute are optional

/^@(\w+)$/
@@node_regex = 
/^(\w+)(?:\[(\d+)\])?(?:@(\w+))?$/

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(allow_document, nodes) ⇒ Node

Nodes is path.split(‘/’)



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# File 'lib/ec2/amitools/xmlbuilder.rb', line 99

def initialize(allow_document, nodes)
  if allow_document && nodes[0] == ''
    @document = true
    nodes.shift
    return
  end
  nodes.shift while nodes[0] == ''
  node = nodes.shift
  if (match = @@node_regex.match(node))
    @element = match[1]
    @index = match[2].to_i || 0
  elsif (match = @@attribute_regex.match(node))
    @attribute = match[1]
  else
    raise 'Invalid path: Node must be of the form element[index] or @attribute' if document
  end
end

Instance Attribute Details

#attribute ⇒ Object (readonly)

Returns the value of attribute attribute.



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# File 'lib/ec2/amitools/xmlbuilder.rb', line 91

def attribute
  @attribute
end

#document ⇒ Object (readonly)

Returns the value of attribute document.



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# File 'lib/ec2/amitools/xmlbuilder.rb', line 88

def document
  @document
end

#element ⇒ Object (readonly)

Returns the value of attribute element.



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# File 'lib/ec2/amitools/xmlbuilder.rb', line 89

def element
  @element
end

#index ⇒ Object (readonly)

Returns the value of attribute index.



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# File 'lib/ec2/amitools/xmlbuilder.rb', line 90

def index
  @index
end