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# XSD4R - XML Schema Namespace library
# Copyright (C) 2000-2007 NAKAMURA, Hiroshi <nahi@ruby-lang.org>.
# This program is copyrighted free software by NAKAMURA, Hiroshi. You can
# redistribute it and/or modify it under the same terms of Ruby's license;
# either the dual license version in 2003, or any later version.
require 'xsd/datatypes'
module XSD
class NS
Namespace = 'http://www.w3.org/XML/1998/namespace'
KNOWN_TAG = {
XSD::Namespace => 'xsd',
XSD::InstanceNamespace => 'xsi',
}
class Assigner
attr_reader :known_tag
def initialize(known_tag)
@known_tag = known_tag.dup
@count = 0
end
def assign(ns)
if @known_tag.key?(ns)
return @known_tag[ns]
end
@count += 1
"n#{@count}"
end
end
attr_reader :default_namespace
class FormatError < Error; end
public
def initialize(tag2ns = nil)
@tag2ns = tag2ns || ns_default
@ns2tag = @tag2ns.invert
@assigner = nil
@default_namespace = nil
end
def known_tag
@assigner ||= Assigner.new(default_known_tag)
@assigner.known_tag
end
def assign(ns, tag = nil)
if tag == ''
if ns.empty?
@default_namespace = nil
else
@default_namespace = ns
end
tag
else
@assigner ||= Assigner.new(default_known_tag)
tag ||= @assigner.assign(ns)
@ns2tag[ns] = tag
@tag2ns[tag] = ns
tag
end
end
def assigned?(ns)
@default_namespace == ns or @ns2tag.key?(ns)
end
def assigned_as_tagged?(ns)
@ns2tag.key?(ns)
end
def assigned_tag?(tag)
@tag2ns.key?(tag)
end
def clone_ns
cloned = self.class.new(@tag2ns.dup)
cloned.assigner = @assigner
cloned.assign(@default_namespace, '') if @default_namespace
cloned
end
def name(qname)
if qname.namespace == @default_namespace
qname.name
elsif tag = @ns2tag[qname.namespace]
"#{tag}:#{qname.name}"
else
raise FormatError.new("namespace: #{qname.namespace} not defined yet")
end
end
# no default namespace
def name_attr(qname)
if tag = @ns2tag[qname.namespace]
"#{tag}:#{qname.name}"
else
raise FormatError.new("namespace: #{qname.namespace} not defined yet")
end
end
def compare(ns, name, rhs)
if (ns == @default_namespace)
return true if (name == rhs)
end
@tag2ns.each do |assigned_tag, assigned_ns|
if assigned_ns == ns && "#{assigned_tag}:#{name}" == rhs
return true
end
end
false
end
# $1 and $2 are necessary.
ParseRegexp = Regexp.new('\A([^:]+)(?::(.+))?\z')
def parse(str, local = false)
if ParseRegexp =~ str
if (name = $2) and (ns = @tag2ns[$1])
return XSD::QName.new(ns, name)
end
end
XSD::QName.new(local ? nil : @default_namespace, str)
end
# For local attribute key parsing
# <foo xmlns="urn:a" xmlns:n1="urn:a" bar="1" n1:baz="2" />
# =>
# {}bar, {urn:a}baz
def parse_local(elem)
ParseRegexp =~ elem
if $2
ns = @tag2ns[$1]
name = $2
if !ns
raise FormatError.new("unknown namespace qualifier: #{$1}")
end
elsif $1
ns = nil
name = $1
else
raise FormatError.new("illegal element format: #{elem}")
end
XSD::QName.new(ns, name)
end
def each_ns
@ns2tag.each do |ns, tag|
yield(ns, tag)
end
end
protected
def assigner=(assigner)
@assigner = assigner
end
private
def ns_default
{'xml' => Namespace}
end
def default_known_tag
KNOWN_TAG
end
end
end
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