Class: REXML::XPath

each(element, path=nil, namespaces=nil, variables={})

Itterates over nodes that match the given path, calling the supplied block with the match.

element:	The context element
path:	The xpath to search for. If not supplied or nil, defaults to ’*’
namespaces:	If supplied, a Hash which defines a namespace mapping

 XPath.each( node ) { |el| ... }
 XPath.each( node, '/*[@attr='v']' ) { |el| ... }
 XPath.each( node, 'ancestor::x' ) { |el| ... }

[Source]

# File rexml/xpath.rb, line 45
                def XPath::each element, path=nil, namespaces=nil, variables={}, &block
      raise "The namespaces argument, if supplied, must be a hash object." unless namespaces.nil? or namespaces.kind_of?(Hash)
      raise "The variables argument, if supplied, must be a hash object." unless variables.kind_of?(Hash)
                        parser = XPathParser.new
                        parser.namespaces = namespaces
                        parser.variables = variables
                        path = "*" unless path
                        element = [element] unless element.kind_of? Array
                        parser.parse(path, element).each( &block )
                end

first(element, path=nil, namespaces=nil, variables={})

Finds and returns the first node that matches the supplied xpath.

element:	The context element
path:	The xpath to search for. If not supplied or nil, returns the first node matching ’*’.
namespaces:	If supplied, a Hash which defines a namespace mapping.

 XPath.first( node )
 XPath.first( doc, "//b"} )
 XPath.first( node, "a/x:b", { "x"=>"http://doofus" } )

[Source]

# File rexml/xpath.rb, line 22
    def XPath::first element, path=nil, namespaces=nil, variables={}
      raise "The namespaces argument, if supplied, must be a hash object." unless namespaces.nil? or namespaces.kind_of?(Hash)
      raise "The variables argument, if supplied, must be a hash object." unless variables.kind_of?(Hash)
                        parser = XPathParser.new
                        parser.namespaces = namespaces
                        parser.variables = variables
                        path = "*" unless path
                        element = [element] unless element.kind_of? Array
                        parser.parse(path, element).flatten[0]
                end

match(element, path=nil, namespaces=nil, variables={})

Returns an array of nodes matching a given XPath.

[Source]

# File rexml/xpath.rb, line 57
                def XPath::match element, path=nil, namespaces=nil, variables={}
                        parser = XPathParser.new
                        parser.namespaces = namespaces
                        parser.variables = variables
                        path = "*" unless path
                        element = [element] unless element.kind_of? Array
                        parser.parse(path,element)
                end

Methods

Included Modules

Constants

Public Class methods