Class: Oos4ruby::Entry

Inherits:
Object
  • Object
show all
Defined in:
lib/oos4ruby/entry.rb

Instance Method Summary collapse

Constructor Details

#initialize(node) ⇒ Entry

Returns a new instance of Entry.



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# File 'lib/oos4ruby/entry.rb', line 8

def initialize(node)
  if node.class == String
    @element = REXML::Document.new(node, { :raw => nil }).root
  else
    @element = node
  end    
end

Instance Method Details

#add_category(term, scheme = nil, label = nil) ⇒ Object 



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# File 'lib/oos4ruby/entry.rb', line 61

def add_category(term, scheme = nil, label = nil)
  c = @element.add_category(term, scheme, label)    
  c
end

#add_child(name, prefix = nil, namespace = nil, attr = {}) ⇒ Object 



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# File 'lib/oos4ruby/entry.rb', line 32

def add_child(name, prefix = nil, namespace = nil, attr = {})
  name = (prefix || 'atom') + ':' + name
  e = REXML::Element.new( name, @element )
  if prefix && namespace
    e.add_namespace(prefix, namespace) 
  else
    e.add_namespace('atom', AtomNamespace)
  end
  if !attr.empty?
    attr.each_pair { |key, value| e.add_attribute(key.to_s, value) }
  end
  e
end

#category(cat) ⇒ Object 



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# File 'lib/oos4ruby/entry.rb', line 46

def category( cat )
  first = true
  xpath = "./atom:category["
  if cat[:term]
    xpath += "@term=\"#{cat[:term]}\""
    first = false
  end
  xpath += " and " unless first
  if cat[:scheme]
    xpath += "@scheme=\"#{cat[:scheme]}\""
  end    
  xpath += "]"
  REXML::XPath.first(@element, xpath, XmlNamespaces)
end

#child(field, namespace = nil) ⇒ Object 



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# File 'lib/oos4ruby/entry.rb', line 20

def child(field, namespace = nil)
  if (namespace)
    thisNS = {}
    prefix = 'NS'
    thisNS[prefix] = namespace
  else
    prefix = 'atom'
    thisNS = XmlNamespaces
  end    
  return REXML::XPath.first(@element, "./#{prefix}:#{field}", thisNS)
end

#delete_category(c) ⇒ Object 



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# File 'lib/oos4ruby/entry.rb', line 66

def delete_category(c)
  @element.delete_element c
end

#first(xp) ⇒ Object 



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# File 'lib/oos4ruby/entry.rb', line 86

def first(xp)
  REXML::XPath.first(@element, xp, XmlNamespaces)
end

#link(rel) ⇒ Object 



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# File 'lib/oos4ruby/entry.rb', line 70

def link(rel)    
  a = REXML::XPath.first(@element, "./atom:link[@rel=\"#{rel}\"]", XmlNamespaces)
  if a      
    uri = URI.parse a.attributes['href']
    if uri.absolute?
      return uri
    else
      return URI.parse(OOS_URL).merge(uri)
    end      
  end    
end

#match(xp) ⇒ Object 



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# File 'lib/oos4ruby/entry.rb', line 82

def match(xp)
  REXML::XPath.match(@element, xp, XmlNamespaces)
end

#to_s ⇒ Object 



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# File 'lib/oos4ruby/entry.rb', line 16

def to_s
  "<?xml version='1.0' ?>\n" + @element.to_s
end