1 | # XSD4R - XML Instance parser library.
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2 | # Copyright (C) 2002, 2003 NAKAMURA, Hiroshi <[email protected]>.
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3 |
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4 | # This program is copyrighted free software by NAKAMURA, Hiroshi. You can
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5 | # redistribute it and/or modify it under the same terms of Ruby's license;
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6 | # either the dual license version in 2003, or any later version.
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7 |
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8 |
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9 | require 'xsd/qname'
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10 | require 'xsd/ns'
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11 | require 'xsd/charset'
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12 |
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13 |
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14 | module XSD
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15 | module XMLParser
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16 |
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17 |
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18 | class Parser
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19 | class ParseError < Error; end
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20 | class FormatDecodeError < ParseError; end
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21 | class UnknownElementError < FormatDecodeError; end
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22 | class UnknownAttributeError < FormatDecodeError; end
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23 | class UnexpectedElementError < FormatDecodeError; end
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24 | class ElementConstraintError < FormatDecodeError; end
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25 |
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26 | @@parser_factory = nil
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27 |
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28 | def self.factory
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29 | @@parser_factory
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30 | end
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31 |
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32 | def self.create_parser(host, opt = {})
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33 | @@parser_factory.new(host, opt)
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34 | end
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35 |
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36 | def self.add_factory(factory)
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37 | if $DEBUG
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38 | puts "Set #{ factory } as XML processor."
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39 | end
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40 | @@parser_factory = factory
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41 | end
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42 |
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43 | public
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44 |
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45 | attr_accessor :charset
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46 |
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47 | def initialize(host, opt = {})
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48 | @host = host
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49 | @charset = opt[:charset] || nil
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50 | end
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51 |
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52 | def parse(string_or_readable)
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53 | @textbuf = ''
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54 | prologue
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55 | do_parse(string_or_readable)
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56 | epilogue
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57 | end
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58 |
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59 | private
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60 |
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61 | def do_parse(string_or_readable)
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62 | raise NotImplementError.new(
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63 | 'Method do_parse must be defined in derived class.')
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64 | end
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65 |
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66 | def start_element(name, attrs)
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67 | @host.start_element(name, attrs)
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68 | end
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69 |
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70 | def characters(text)
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71 | @host.characters(text)
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72 | end
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73 |
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74 | def end_element(name)
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75 | @host.end_element(name)
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76 | end
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77 |
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78 | def prologue
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79 | end
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80 |
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81 | def epilogue
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82 | end
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83 |
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84 | def xmldecl_encoding=(charset)
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85 | if @charset.nil?
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86 | @charset = charset
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87 | else
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88 | # Definition in a stream (like HTTP) has a priority.
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89 | p "encoding definition: #{ charset } is ignored." if $DEBUG
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90 | end
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91 | end
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92 | end
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93 |
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94 |
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95 | end
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96 | end
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