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=begin
XSD4R - XML Schema Namespace library
Copyright (C) 2000, 2001, 2002, 2003 NAKAMURA, Hiroshi.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PRATICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 675 Mass
Ave, Cambridge, MA 02139, USA.
=end
require 'xsd/datatypes'
module XSD
class NS
class Assigner
def initialize
@count = 0
end
def assign(ns)
@count += 1
"n#{ @count }"
end
end
attr_reader :default_namespace
class FormatError < Error; end
public
def initialize(tag2ns = {})
@tag2ns = tag2ns
@assigner = nil
@ns2tag = {}
@tag2ns.each do |tag, ns|
@ns2tag[ns] = tag
end
@default_namespace = nil
end
def assign(ns, tag = nil)
if (tag == '')
@default_namespace = ns
tag
else
@assigner ||= Assigner.new
tag ||= @assigner.assign(ns)
@ns2tag[ns] = tag
@tag2ns[tag] = ns
tag
end
end
def assigned?(ns)
@ns2tag.key?(ns)
end
def assigned_tag?(tag)
@tag2ns.key?(tag)
end
def clone_ns
cloned = NS.new(@tag2ns.dup)
cloned.assigner = @assigner
cloned.assign(@default_namespace, '') if @default_namespace
cloned
end
def name(name)
if (name.namespace == @default_namespace)
name.name
elsif @ns2tag.key?(name.namespace)
@ns2tag[name.namespace] + ':' << name.name
else
raise FormatError.new('Namespace: ' << name.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 $2 are necessary.
ParseRegexp = Regexp.new('^([^:]+)(?::(.+))?$')
def parse(elem)
ns = nil
name = nil
ParseRegexp =~ elem
if $2
ns = @tag2ns[$1]
name = $2
if !ns
raise FormatError.new('Unknown namespace qualifier: ' << $1)
end
elsif $1
ns = @default_namespace
name = $1
end
if !name
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
end
end
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