method

get_attribute

Ruby latest stable (v2_5_5) - 0 notes - Class: REXML::Attributes

get_attribute( name ) public

Fetches an attribute

name	the name by which to search for the attribute. Can be a `prefix:name` namespace name.
Returns	The first matching attribute, or nil if there was none. This

value is an Attribute node, not the String value of the attribute.

doc = Document.new '<a x:foo="1" foo="2" bar="3"/>'
doc.root.attributes.get_attribute("foo").value    #-> "2"
doc.root.attributes.get_attribute("x:foo").value  #-> "1"

Show source

# File lib/rexml/element.rb, line 1065
    def get_attribute( name )
      attr = fetch( name, nil )
      if attr.nil?
        return nil if name.nil?
        # Look for prefix
        name =~ Namespace::NAMESPLIT
        prefix, n = $1, $2
        if prefix
          attr = fetch( n, nil )
          # check prefix
          if attr == nil
          elsif attr.kind_of? Attribute
            return attr if prefix == attr.prefix
          else
            attr = attr[ prefix ]
            return attr
          end
        end
        element_document = @element.document
        if element_document and element_document.doctype
          expn = @element.expanded_name
          expn = element_document.doctype.name if expn.size == 0
          attr_val = element_document.doctype.attribute_of(expn, name)
          return Attribute.new( name, attr_val ) if attr_val
        end
        return nil
      end
      if attr.kind_of? Hash
        attr = attr[ @element.prefix ]
      end
      return attr
    end

get_attribute

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