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package POE::Filter::XML::RPC::Value; |
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2443
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use 5.010; |
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use warnings; |
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use strict; |
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use base('POE::Filter::XML::Node', 'Exporter'); |
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878
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use Scalar::Util('looks_like_number', 'reftype'); |
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use Regexp::Common('time'); |
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use Hash::Util('fieldhash'); |
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our $VERSION = '0.04'; |
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use constant |
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{ |
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'ARRAY' => 'array', |
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'BASE64' => 'base64', |
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'BOOL' => 'bool', |
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'DATETIME' => 'dateTime.iso8601', |
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'DOUBLE' => 'double', |
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'INT' => 'int', |
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'STRING' => 'string', |
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'STRUCT' => 'struct', |
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'DATA' => 'data', |
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'NAME' => 'name', |
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'VALUE' => 'value', |
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'MEMBER' => 'member', |
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}; |
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our @EXPORT= qw/ ARRAY BASE64 BOOL DATETIME DOUBLE INT STRING STRUCT /; |
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sub new |
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{ |
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my $class = shift(@_); |
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my $arg = shift(@_); |
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my $force_type = shift(@_); |
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my $val = process($arg, $force_type); |
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bless($val, $class); |
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$val->_type($force_type // determine_type($arg)); |
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return $val; |
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} |
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sub process |
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{ |
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my ($arg, $force) = (shift(@_), shift(@_)); |
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my $val = __PACKAGE__->SUPER::new(+VALUE); |
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given($force // determine_type($arg)) |
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{ |
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when(+ARRAY) |
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{ |
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my $data = $val->appendChild(+ARRAY)->appendChild(+DATA); |
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foreach(@$arg) |
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{ |
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$data->appendChild(process($_)); |
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} |
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} |
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when(+STRUCT) |
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{ |
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my $struct = $val->appendChild(+STRUCT); |
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while(my ($key, $val) = each %$arg) |
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{ |
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my $member = $struct->appendChild(+MEMBER); |
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$member->appendChild(+NAME)->appendText($key); |
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$member->appendChild(process($val)); |
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} |
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} |
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default |
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{ |
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$val->appendChild($_)->appendText($arg); |
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} |
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} |
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return $val; |
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} |
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sub value() |
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{ |
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my ($self, $arg, $force_type) = (shift(@_), shift(@_), shift(@_)); |
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if(defined($arg)) |
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{ |
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$self->removeChild($self->firstChild()); |
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my $type = $force_type // determine_type($arg); |
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$self->appendChild($type)->appendText($arg); |
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$self->_type($type); |
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} |
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else |
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{ |
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my $content = $self->findvalue('child::text()'); |
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if(defined($content) && length($content)) |
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{ |
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return $content; |
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} |
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else |
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{ |
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return node_to_value($self); |
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} |
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} |
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} |
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107
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sub node_to_value |
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{ |
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my $node = shift(@_); |
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my $content = $node->findvalue('child::text()'); |
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return $content if defined($content) && length($content); |
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my $val = $node->firstChild(); |
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given($val->nodeName()) |
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{ |
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when(+STRUCT) |
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{ |
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my $struct = {}; |
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foreach($val->findnodes('child::member')) |
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{ |
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$struct->{$_->findvalue('child::name/child::text()')} = |
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node_to_value(($_->findnodes('child::value'))[0]); |
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} |
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126
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return $struct; |
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} |
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when(+ARRAY) |
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{ |
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my $array = []; |
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foreach($val->findnodes('child::data/child::value')) |
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{ |
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push(@$array, node_to_value($_)); |
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} |
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137
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return $array; |
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} |
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default |
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{ |
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return $val->findvalue('child::text()'); |
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} |
143
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} |
144
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} |
145
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146
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sub type() |
147
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{ |
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my $self = shift(@_); |
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if(!defined($self->_type())) |
150
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{ |
151
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my $content = $self->findvalue('child::text()'); |
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153
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if(defined($content) && length($content)) |
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{ |
155
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# string |
156
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$self->_type(+STRING); |
157
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return +STRING; |
158
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} |
159
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160
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my $determined = determine_type($self->value()); |
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$self->_type($determined); |
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return $determined; |
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} |
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else |
165
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{ |
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return $self->_type(); |
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} |
168
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} |
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170
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sub _type() |
171
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{ |
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my ($self, $arg) = (shift(@_), shift(@_)); |
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fieldhash state %type; |
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175
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if(defined($arg)) |
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{ |
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$type{$self} = $arg; |
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} |
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else |
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{ |
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return $type{$self}; |
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} |
183
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} |
184
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185
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sub determine_type($) |
186
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{ |
187
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my $arg = shift(@_); |
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189
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given($arg) |
190
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{ |
191
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when(m@^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$@) |
192
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{ |
193
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return +BASE64; |
194
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} |
195
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when(/^(?:1|0){1}$|^true$|^false$/i) |
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{ |
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return +BOOL; |
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} |
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} |
200
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201
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if(looks_like_number($arg)) |
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{ |
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if($arg =~ /\.{1}/) |
204
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{ |
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return +DOUBLE; |
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} |
207
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else |
208
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{ |
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return +INT; |
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} |
211
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} |
212
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213
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given(reftype($arg) // '') |
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{ |
215
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when('ARRAY') |
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{ |
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return +ARRAY; |
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} |
219
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when('HASH') |
220
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{ |
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return +STRUCT; |
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} |
223
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default |
224
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{ |
225
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state $iso = "$RE{'time'}{'iso'}"; |
226
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if($arg =~ /$iso/) |
227
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{ |
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return +DATETIME; |
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} |
230
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return +STRING; |
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} |
232
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} |
233
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} |
234
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235
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=pod |
236
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237
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=head1 NAME |
238
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239
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POE::Filter::XML::RPC::Value - Represents XMLRPC value types |
240
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241
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=head1 SYNOPSIS |
242
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243
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use 5.010; |
244
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use POE::Filter::XML::RPC::Value; |
245
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246
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my $val1 = POE::Filter::XML::RPC::Value->new([qw/one two three/]); |
247
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my $val2 = POE::Filter::XML::RPC::Value->new('1A2B3C=='); |
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my $val3 = POE::Filter::XML::RPC::Value->new(1); |
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my $val4 = POE::Filter::XML::RPC::Value->new('19980717T14:08:55'); |
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my $val5 = POE::Filter::XML::RPC::Value->new(1.00); |
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my $val6 = POE::Filter::XML::RPC::Value->new(42); |
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my $val7 = POE::Filter::XML::RPC::Value->new('some text'); |
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my $val8 = POE::Filter::XML::RPC::Value->new({'key' => 'val'}); |
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my $val9 = POE::Filter::XML::RPC::Value->new(1234, +STRING); |
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say $val1->type(); # array |
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say $val2->type(); # base64 |
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say $val3->type(); # bool |
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say $val4->type(); # dateTime.iso8601 |
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say $val5->type(); # double |
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say $val6->type(); # int |
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say $val7->type(); # string |
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say $val8->type(); # struct |
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say $val9->type(); # string |
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=head1 DESCRIPTION |
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268
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POE::Filter::XML::RPC::Value does most of the automagical marshalling that is |
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expected when dealing with XMLRPC value types. Structs are converted to hashes. |
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Arrays are converted to arrays, etc. And it works both ways. So if passed a |
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complex, nested Perl data structure, it will Do The Right Thing. |
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273
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=head1 PUBLIC METHODS |
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=over 4 |
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277
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=item new() |
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279
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new() accepts a scalar, and an optional type argument to use to construct the |
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the value. See EXPORTED CONSTANTS for acceptable types. |
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The scalar provided can contain a string, hash or array reference, or may be a |
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numerical value. Scalar::Util is put to good use to determine what kind of |
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value was passed, and some good old fashion regular expression magic thrown at |
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it to see if it is a ISO 8601 datetime, or perhaps BASE64 encoded data. |
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If the type determination turns out wrong for whatever reason, a type argument |
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can also be supplied to force a particular type. |
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290
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=item type() |
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292
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type() returns what type of value is represented. For values received from some |
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where else, it will spelunk into the data and determine the type using the same |
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heuristics used for construction. Will be one of the EXPORTED CONSTANTS |
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296
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=item value() |
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298
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value() returns the data properly marshalled into whatever Perl type is valid. |
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Arrays and Structs will be marshalled into their Perl equivalent and returned |
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as a reference to that type, while all other types will be return as a scalar. |
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302
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value() can also take a new value to replace the old one. It can even be of a |
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different type. And again if the heuristics for your data don't do the right |
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thing, you can also provide a second argument of what type the data should be. |
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306
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=back |
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308
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=head1 PRIVATE METHODS |
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310
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=over 4 |
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312
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=item _type() |
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314
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_type() stores the cached type of the current Value with examining the content |
315
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to determine if that still holds true. Use with care. |
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317
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=back |
318
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319
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=head1 PROTECTED FUNCTIONS |
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321
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These are not exported or available for export at all. |
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323
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=over 4 |
324
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325
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=item determine_type |
326
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327
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This function contains the logic behind the type guessing heuristic. Simply |
328
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supply whatever scalar you want to it and it will return one of the EXPORTED |
329
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CONSTANTS. |
330
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331
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=item node_to_value |
332
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333
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This function takes a POE::Filter::XML::Node of the following structure: |
334
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335
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<value> |
336
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<!-- some other stuff in here, could be <array/>,<struct/>, etc --> |
337
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</value> |
338
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339
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then marshals and returns that data to you. |
340
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341
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=back |
342
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343
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=head1 EXPORTED CONSTANTS |
344
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345
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Here are the exported constants and their values. Note that the values for |
346
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these constants are the same as valid tag names for value types in XMLRPC. |
347
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348
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+ARRAY => 'array', |
349
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+BASE64 => 'base64', |
350
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+BOOL => 'bool', |
351
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+DATETIME => 'dateTime.iso8601', |
352
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+DOUBLE => 'double', |
353
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+INT => 'int', |
354
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+STRING => 'string', |
355
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+STRUCT => 'struct', |
356
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357
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|
=head1 NOTES |
358
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359
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|
Value is actually a subclass of POE::Filter::XML::Node and so all of its |
360
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|
methods, including XML::LibXML::Element's, are available for use. This could |
361
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|
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|
ultimately be useful to avoid marshalling all of the data out of the Node and |
362
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|
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|
|
instead apply an XPATH expression to target specifically what is desired deep |
363
|
|
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|
within a nested structure. |
364
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365
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=head1 AUTHOR |
366
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367
|
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|
Copyright 2009 Nicholas Perez. |
368
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|
Licensed and distributed under the GPL. |
369
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370
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=cut |
371
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372
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1; |