1 files changed, 141 insertions, 0 deletions
diff --git a/lib/xsd/ns.rb b/lib/xsd/ns.rb
new file mode 100644
index 0000000000..0767b2c30d
--- /dev/null
+++ b/lib/xsd/ns.rb
@@ -0,0 +1,141 @@
+=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