annotate Lib/IMPL/Serialization.pm @ 105:a6e9759ff88a

Fixed a validation errors parameters
author wizard
date Tue, 11 May 2010 02:59:49 +0400
parents b0c068da93ac
children 5edc2ac5231c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 package IMPL::Serialization;
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2 use strict;
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3
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4 # 20060222
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5 # ������ ��� ������������ �������� ������
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6 # (�) Sourcer, cin.sourcer@gmail.com
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7 # revision 3 (20090517)
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8
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9
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10 package IMPL::Serialization::Context;
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11 use base qw(IMPL::Object);
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12
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13 use IMPL::Class::Property;
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14 use IMPL::Class::Property::Direct;
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15 use IMPL::Exception;
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16 use Scalar::Util qw(refaddr);
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17
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18 BEGIN {
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19 private _direct property ObjectWriter => prop_all; # ������, ������������ ������ � �����
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20 private _direct property Context => prop_all; # �������� (������� ������� ��� �������������, �� ��������������)
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21 private _direct property NextID => prop_all;# ��������� ������������� ��� �������
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22
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23 # ���������, ������� �����, ��� ��������������� ������������ ����. ������ ����������
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24 # �������� ������ �� IMPL::Serialization::Context, ������ ���������� ������ �� ������
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25 public _direct property Serializer => prop_all;
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26
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27 private _direct property State => prop_all; # ��������� ��������� ������������
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28 }
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29
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30 # �������� ������, �.�. ������� ������ �� �����
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31 sub STATE_CLOSED () { 0 }
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32 # �������� ������, �.�. ������ �����, �� � ��� ��� ������ �� �����
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33 sub STATE_OPENED () { 1 }
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34 # �������� ������ � � ���� ����� ���� ��������� ������ ����������
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35 sub STATE_COMPLEX () { 2 }
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36 # �������� ������ � � ���� ��� ������ �� ����� ���� ���������, ��� ����� ������
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37 sub STATE_DATA () { 3 }
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38
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39 sub CTOR {
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40 my ($this,%args) = @_;
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41
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42 $this->{$ObjectWriter} = $args{'ObjectWriter'};
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43 #$this->{$Context} = {};
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44 $this->{$NextID} = 1;
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45 $this->{$Serializer} = ($args{'Serializer'} ? $args{'Serializer'} : \&DefaultSerializer );
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46 $this->{$State} = STATE_CLOSED;
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47
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48 return 1;
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49 }
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50
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51 sub AddVar {
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52 my ($this,$sName,$Var) = @_;
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53
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54 die new Exception ('Invalid operation') if $this->{$State} == STATE_DATA;
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55
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56 if (not ref $Var) {
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57 # ������� ����������� ��, ��� �����, �� ��� ���� ����, ����� �������, ������� ����
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58 # �� �� ������, �� �������� ��������������, �� �� �� �����
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59 my $prevState = $this->{$State};
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60
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61 $this->{$ObjectWriter}->BeginObject(name => $sName);#, type => 'SCALAR');
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62 $this->{$State} = STATE_OPENED;
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63
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64 $this->{$Serializer}->($this,\$Var);
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65
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66 $this->{$ObjectWriter}->EndObject();
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67
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68 if ($prevState == STATE_OPENED) {
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69 $this->{$State} = STATE_COMPLEX;
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70 } else {
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71 $this->{$State} = $prevState;
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72 }
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73 return 0;
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74 }
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75
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76 my $PrevState = $this->{$State};
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77
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78 my $ObjID = $this->{$Context}->{refaddr $Var};
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79 if ($ObjID) {
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80 $this->{$ObjectWriter}->BeginObject(name => $sName, refid => $ObjID);
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81 $this->{$ObjectWriter}->EndObject();
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82 return $ObjID;
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83 }
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84
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85 $ObjID = $this->{$NextID};
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86 $this->{$NextID} = $ObjID + 1;
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87
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88 $this->{$Context}->{refaddr $Var} = $ObjID;
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89
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90 $this->{$ObjectWriter}->BeginObject(name => $sName, type => ref($Var), id => $ObjID);
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91
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92 $this->{$State} = STATE_OPENED;
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93 $this->{$Serializer}->($this,$Var);
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94
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95 $this->{$ObjectWriter}->EndObject();
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96
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97 if ($PrevState == STATE_OPENED) {
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98 $this->{$State} = STATE_COMPLEX;
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99 } else {
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100 $this->{$State} = $PrevState;
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101 }
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102
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103 return $ObjID;
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104 }
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105
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106 sub SetData {
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107 my ($this,$Data,$Type) = @_;
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108
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109 die new Exception ('The object should be a scalar value') if ref $Data;
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110 die new Exception ('Invalid operation') if $this->{$State} != STATE_OPENED;
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111
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112 $this->{$ObjectWriter}->SetData($Data,$Type);
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113
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114 $this->{$State} = STATE_DATA;
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115
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116 return 1;
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117 }
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118
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119 sub DefaultSerializer {
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120 my ($Context, $refObj) = @_;
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121
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122 if (ref($refObj) eq 'SCALAR') {
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123 $Context->SetData($$refObj, 'SCALAR');
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124 } elsif (ref($refObj) eq 'ARRAY') {
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125 $Context->AddVar('item',$_) foreach @$refObj;
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126 } elsif (ref($refObj) eq 'HASH') {
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127 while (my ($key,$value) = each %$refObj) {
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128 $Context->AddVar($key,$value);
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129 }
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130 } elsif (ref($refObj) eq 'REF') {
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131 $Context->AddVar('ref',$$refObj);
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132 } else {
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133 if (ref $refObj and $refObj->UNIVARSAL::can('save')) {
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134 $refObj->save($Context);
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135 } else {
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136 die new Exception('Cant serialize the object of the type: '.ref($refObj));
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137 }
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138 }
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139
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140 return 1;
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141 }
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142
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143 package IMPL::Deserialization::Context;
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144 use base qw(IMPL::Object);
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145
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146 use IMPL::Class::Property;
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147 use IMPL::Class::Property::Direct;
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148 use IMPL::Exception;
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149
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150 BEGIN {
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151 # ��� ����������������� �������, ���, ���� - �������������, �������� - ������.
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152 private _direct property Context => prop_all;
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153
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154 # ������� ������. ���������� ��� ��������������
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155 # {
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156 # Type => 'typename',
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157 # Name => 'object_name',
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158 # Data => $Data,
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159 # Id => 'object_id'
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160 # }
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161 private _direct property CurrentObject => prop_all;
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162
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163 # ���� ��������. ���� ����������� �������� �������� �� ���� ���������� ����� ��������.
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164 private _direct property ObjectsPath => prop_all;
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165
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166 # ���� ������� ������ ����� ��������
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167 public _direct property Root => prop_get;
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168
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169 # ������� ������ � ���������� �� ���� ������
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170 # ObjectFactory($Type,$DeserializationData,$refSurogate)
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171 # $Type - ��� ���� ������
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172 # $DeserializationData - ���� ������ �� ������ � ������� ��� �������������� �����,
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173 # ���� ������ ���������� ������.
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174 # $refSurogate - ������ �� �������������� ���������, �� ������������������ ������.
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175 # ����� ��������� �������� undef
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176 private _direct property ObjectFactory => prop_all;
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177
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178 # ������� �������������������� �������.
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179 # SurogateHelper($Type)
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180 # $Type ��� �����, ��� ������� ����� �������.
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181 private _direct property SurogateHelper => prop_all;
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182 }
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183
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184 sub CTOR {
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185 my ($this,%args) = @_;
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186 $this->{$CurrentObject} = undef;
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187 $this->{$Root} = undef;
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188 }
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189
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190 sub OnObjectBegin {
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191 my ($this,$name,$rhProps) = @_;
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192
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193 die new Exception("Invalid data from an ObjectReader","An object reader should pass a referense to a hash which contains attributes of an object") if (ref $rhProps ne 'HASH');
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194 die new Exception("Trying to create second root object") if not $this->{$CurrentObject} and $this->{$Root};
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195
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196 if ($rhProps->{'refid'}) {
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197 my $refObj = $this->{$Context}->{$rhProps->{'refid'}};
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198 die new Exception("A reference to a not existing object found") if not $refObj;
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199 my $rhCurrentObj = $this->{$CurrentObject};
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200
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201 die new Exception("Found a reference to an object as a root of an object's graph") if not $rhCurrentObj;
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202
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203 if ($rhCurrentObj->{'Data'}) {
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204 die new Exception("Invalid serializaed data","Plain deserialization data for an object already exist") if not ref $rhCurrentObj->{'Data'};
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205 push @{$rhCurrentObj->{'Data'}}, $name,$refObj;
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206 } else {
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207 $rhCurrentObj->{'Data'} = [$name,$refObj];
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208 }
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209
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210 # ��� �����, ��� ����� ������ OnObjectEnd ��� �������, ������� ��� ������� �������. �.�. �� �� ������� ����
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211 push @{$this->{$ObjectsPath}},$rhCurrentObj;
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212 $this->{$CurrentObject} = undef;
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213
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214 } else {
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215 push @{$this->{$ObjectsPath}},$this->{$CurrentObject} if $this->{$CurrentObject};
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216
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217 $this->{$CurrentObject} = {
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218 Name => $name,
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219 Type => $rhProps->{'type'} || 'SCALAR',
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220 Id => $rhProps->{'id'},
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221 refId => $rhProps->{'refid'}
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222 };
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223
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224 if (defined $rhProps->{'id'}) {
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225 die new IMPL::Exception("Trying to create a simple object instead of a reference, type is missing.",$name,$rhProps->{id}) unless $rhProps->{'type'} ;
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226 $this->{$Context}->{$rhProps->{'id'}} = $this->{$SurogateHelper} ? $this->{$SurogateHelper}->($rhProps->{'type'}) : DefaultSurogateHelper($rhProps->{'type'});
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227 }
0
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228 }
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229
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230 return 1;
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231 }
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232
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233 sub OnObjectData {
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234 my ($this,$data) = @_;
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235
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236 my $rhObject = $this->{$CurrentObject};
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237
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238 die new Exception("Trying to set data for an object which not exists") if not $rhObject;
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239
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240 die new Exception("Deserialization data already exists for a current object", "ObjectName= $rhObject->{'Name'}") if $rhObject->{'Data'};
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241
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242 $rhObject->{'Data'} = $data;
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243
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244 return 1;
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245 }
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246 {
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247 my $AutoId = 0;
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248 sub OnObjectEnd {
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249 my ($this,$name) = @_;
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250
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251 my $rhObject = $this->{$CurrentObject};
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252 my $rhPrevObject = pop @{$this->{$ObjectsPath}};
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253
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254 # ���� ������� ������ �� ���������, � ���������� - ���������, ������ ������� - ��� ������
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255 # ������ ��������������� ���������� � ������� � ������ ����� �� ������
0
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256 if ((not defined($rhObject)) && $rhPrevObject) {
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257 $this->{$CurrentObject} = $rhPrevObject;
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258 return 1;
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259 }
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260
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261 my $refObj = $this->{$ObjectFactory} ?$this->{$ObjectFactory}->($rhObject->{'Type'},$rhObject->{'Data'},$rhObject->{'Id'} ? $this->{$Context}->{$rhObject->{'Id'}} : undef) : DefaultFactory($rhObject->{'Type'},$rhObject->{'Data'},$rhObject->{'Id'} ? $this->{$Context}->{$rhObject->{'Id'}} : undef);
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262
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263 die new Exception("Trying to close a non existing oject") if not $rhObject;
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264
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265 my $Data;
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266
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267 if ($rhObject->{'Id'}) {
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268 $this->{$Context}->{$rhObject->{'Id'}} = $refObj;
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269 $Data = $refObj;
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270 } else {
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271 if (ref $refObj ne 'SCALAR') {
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272 $rhObject->{Id} = "auto$AutoId";
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273 $AutoId ++;
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274 $this->{$Context}->{$rhObject->{'Id'}} = $refObj;
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275 $Data = $refObj;
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276 } else {
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277 $Data = ${$refObj};
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278 }
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279 }
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280
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281 if (not $rhPrevObject) {
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282 $this->{$Root} = $Data;
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283 } else {
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284 if ($rhPrevObject->{'Data'}) {
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285 die new Exception("Trying append a reference to an object to the plain data") if not ref $rhPrevObject->{'Data'};
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286 push @{$rhPrevObject->{'Data'}},$rhObject->{'Name'},$Data;
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287 } else {
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288 $rhPrevObject->{'Data'} = [$rhObject->{'Name'},$Data];
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289 }
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290 }
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291
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292 $this->{$CurrentObject} = $rhPrevObject;
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293
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294 return 1;
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295 }
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296 }
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297
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298 sub _is_class {
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299 no strict 'refs';
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300 scalar keys %{"$_[0]::"} ? 1 : 0;
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301 }
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302
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303 sub DefaultSurogateHelper {
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304 my ($Type) = @_;
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305
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306 if ($Type eq 'SCALAR' or $Type eq 'REF') {
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307 my $var;
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308 return \$var;
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309 } elsif ($Type eq 'ARRAY') {
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310 return [];
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311 } elsif ($Type eq 'HASH') {
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312 return {};
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313 } elsif ($Type) {
0
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314 eval "require $Type" unless _is_class($Type);
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315 if (UNIVERSAL::can($Type,'surrogate')) {
0
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316 return $Type->surrogate();
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317 } else {
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318 return bless {}, $Type;
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319 }
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320 }
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321 }
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322
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323 # deserialization context:
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324 # [
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325 # 'var_name',value,
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326 # ....
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327 # ]
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328
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329 sub DefaultFactory {
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330 my ($Type,$Data,$refSurogate) = @_;
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331
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332 if ($Type eq 'SCALAR') {
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333 die new Exception("SCALAR needs a plain data for a deserialization") if ref $Data;
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diff changeset
334 if ($refSurogate) {
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diff changeset
335 $$refSurogate = $Data;
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336 return $refSurogate;
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337 } else {
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338 return \$Data;
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diff changeset
339 }
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340 } elsif ($Type eq 'ARRAY') {
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diff changeset
341 die new Exception("Invalid a deserialization context when deserializing ARRAY") if not ref $Data and defined $Data;
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diff changeset
342 if (not ref $refSurogate) {
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diff changeset
343 my @Array;
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344 $refSurogate = \@Array;
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345 }
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346 for (my $i = 0; $i < scalar(@{$Data})/2; $i++) {
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347 push @$refSurogate,$Data->[$i*2+1];
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348 }
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349 return $refSurogate;
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350 } elsif ($Type eq 'HASH') {
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351 die new Exception("Invalid a deserialization context when deserializing HASH") if not ref $Data and defined $Data;
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352 if (not ref $refSurogate) {
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353 $refSurogate = {};
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354 }
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355 for (my $i = 0; $i< @$Data; $i+= 2) {
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356 $refSurogate->{$Data->[$i]} = $Data->[$i+1];
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357 }
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358 return $refSurogate;
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359 } elsif ($Type eq 'REF') {
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360 die new Exception("Invalid a deserialization context when deserializing REF") if not ref $Data and defined $Data;
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361 if (not ref $refSurogate) {
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362 my $ref = $Data->[1];
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363 return \$ref;
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364 } else {
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365 $$refSurogate = $Data->[1];
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366 return $refSurogate;
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367 }
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368 } else {
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369 eval "require $Type" unless _is_class($Type);
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370 if ( $Type->UNIVERSAL::can('restore') ) {
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371 return $Type->restore($Data,$refSurogate);
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372 } else {
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373 die new Exception("Don't know how to deserialize $Type");
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374 }
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375 }
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376 }
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377
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378 package IMPL::Serializer;
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379 use base qw(IMPL::Object);
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380
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381 use IMPL::Class::Property;
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382 use IMPL::Class::Property::Direct;
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383 use IMPL::Exception;
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384
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385 BEGIN {
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386 private _direct property Formatter => prop_all;
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387 }
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388
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389 sub CTOR {
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390 my ($this,%args) = @_;
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391 $this->Formatter($args{'Formatter'}) or die new Exception("Omitted mandatory parameter 'Formatter'");
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392 }
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393
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394 sub Serialize {
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395 my $this = shift;
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396 my ($hStream,$Object) = @_;
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397 my $ObjWriter = $this->Formatter()->CreateWriter($hStream);
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398 my $Context = new IMPL::Serialization::Context(ObjectWriter => $ObjWriter);
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399 $Context->AddVar('root',$Object);
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400 return 1;
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401 }
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402
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403 sub Deserialize {
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404 my $this = shift;
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405 my ($hStream) = @_;
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406 my $Context = new IMPL::Deserialization::Context();
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407 my $ObjReader = $this->Formatter()->CreateReader($hStream,$Context);
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408 $ObjReader->Parse();
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409 return $Context->Root();
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410 }
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411
49
16ada169ca75 migrating to the Eclipse IDE
wizard@linux-odin.local
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412 1;