[22858] | 1 | package AutoLoadConverters;
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| 2 |
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| 3 | use strict;
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| 4 | no strict 'refs';
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| 5 | no strict 'subs';
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| 6 |
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| 7 | use PrintInfo;
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| 8 |
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| 9 | use gsprintf 'gsprintf';
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| 10 |
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| 11 | sub BEGIN {
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| 12 | @AutoLoadConverters::ISA = ('PrintInfo');
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| 13 | }
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| 14 |
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| 15 | # the dynamic conversion args will get added here
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| 16 | my $arguments = [];
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| 17 |
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| 18 | my $options = { 'name' => "AutoLoadConverters",
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| 19 | 'desc' => "{AutoLoadConverters.desc}",
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| 20 | 'abstract' => "yes",
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| 21 | 'inherits' => "yes",
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| 22 | 'args' => $arguments };
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| 23 |
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| 24 | sub dynamically_load_converter
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| 25 | {
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| 26 | my ($autoPackage, $calling_class) = @_;
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| 27 |
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| 28 | my $settings = {};
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| 29 |
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| 30 | my ($autoName) = ($autoPackage =~ m/(^.*)Converter$/);
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| 31 | my $autoVar = lc($autoName);
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| 32 | $settings->{'converter_name'} = $autoName;
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| 33 | $settings->{'converter_var'} = $autoVar;
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| 34 |
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| 35 | eval("require $autoPackage");
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| 36 | if ($@) {
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| 37 | # Useful debugging statement if there is a syntax error in the plugin
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| 38 | #print STDERR "$@\n";
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| 39 | $settings->{'converter_installed'} = 0;
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| 40 | $settings->{'conversion_available'} = 0;
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| 41 | }
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| 42 | else {
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| 43 | # found the converter
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| 44 | $settings->{'conversion_installed'} = 1;
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| 45 | print STDERR "AutoLoadConverters: $autoName Extension to Greenstone detected for $calling_class\n";
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| 46 | # but can it run???
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| 47 | if (eval "\$${autoPackage}::${autoVar}_conversion_available") {
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| 48 | $settings->{'conversion_available'} = 1;
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| 49 | push(@AutoLoadConverters::ISA, $autoPackage);
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| 50 |
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| 51 | } else {
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| 52 | $settings->{'conversion_available'} = 0;
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| 53 | print STDERR "... but it appears to be broken\n";
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| 54 | &gsprintf(STDERR, "AutoLoadConverters: {AutoloadConverter.noconversionavailable}");
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[24728] | 55 | my $dictentry_reason = eval "\$${autoPackage}::no_${autoVar}_conversion_reason";
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[22858] | 56 |
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[24728] | 57 | &gsprintf(STDERR, " ({$autoPackage\.$dictentry_reason})\n");
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[22858] | 58 |
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| 59 | }
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| 60 | }
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| 61 |
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| 62 | if ($settings->{'conversion_available'}) {
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| 63 |
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| 64 | my $opt_conversion_args =
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| 65 | [ { 'name' => "$autoVar\_conversion",
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| 66 | 'desc' => "{$autoPackage.$autoVar\_conversion}",
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| 67 | 'type' => "flag",
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| 68 | 'reqd' => "no" } ];
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| 69 |
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| 70 | $settings->{'converter_arguments'} = $opt_conversion_args;
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| 71 |
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| 72 | }
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| 73 | return $settings;
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| 74 |
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| 75 |
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| 76 | }
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| 77 |
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| 78 | ####
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| 79 | # This plugin takes an extra initial parameter in its constructor (compared
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| 80 | # with the norm). The extra parameter is an array of converters
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| 81 | # it should try to dynamically load
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| 82 | #####
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| 83 |
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| 84 | sub new {
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| 85 |
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| 86 | # Start the AutoExtractMetadata Constructor
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| 87 | my $class = shift (@_);
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| 88 | my ($pluginlist,$inputargs,$hashArgOptLists,$autoPackages, $auxiliary) = @_;
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| 89 |
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| 90 | push(@$pluginlist, $class);
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| 91 | my $classPluginName = $pluginlist->[0];
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| 92 |
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| 93 | push(@{$hashArgOptLists->{"OptList"}},$options);
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| 94 |
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| 95 | # this static list is just for pluginfo on AutoLoadConverters - we will try to explicitly load all packages
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| 96 | $autoPackages = ["OpenOfficeConverter", "PDFBoxConverter"] unless defined $autoPackages;
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| 97 |
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| 98 | my @self_array = ();
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| 99 | my $temporary_self = {};
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| 100 | $temporary_self->{'converter_list'} = [];
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| 101 | push (@self_array, $temporary_self);
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| 102 | foreach my $packageName (@$autoPackages) {
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| 103 | my $package_settings = &dynamically_load_converter($packageName, $classPluginName);
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| 104 | my $available_var = $package_settings->{'converter_var'}."_available";
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| 105 | if ($package_settings->{'conversion_available'}) {
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| 106 | push(@$arguments, @{$package_settings->{'converter_arguments'}});
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| 107 | my $package_self = eval "new $packageName(\$pluginlist, \$inputargs, \$hashArgOptLists,1);";
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| 108 | push (@self_array, $package_self);
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| 109 | $temporary_self->{$available_var} = 1;
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| 110 | push(@{$temporary_self->{'converter_list'}}, $packageName);
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| 111 | } else {
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| 112 | $temporary_self->{$available_var} = 0;
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| 113 | }
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| 114 | }
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| 115 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 116 | my $self;
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| 117 | my $pi_self = new PrintInfo($pluginlist, $inputargs, $hashArgOptLists, 1);
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| 118 | push (@self_array, $pi_self);
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| 119 | $self = BasePlugin::merge_inheritance(@self_array);
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| 120 |
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| 121 | return bless $self, $class;
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| 122 | }
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| 123 |
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| 124 | sub init {
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| 125 | my $self = shift (@_);
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| 126 |
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| 127 | foreach my $converter (@{$self->{'converter_list'}}) {
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[23752] | 128 | eval "\$self->${converter}::init(\@_);";
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[22858] | 129 | }
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| 130 |
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| 131 | }
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| 132 |
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| 133 | sub begin {
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| 134 | my $self = shift (@_);
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| 135 |
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| 136 | foreach my $converter(@{$self->{'converter_list'}}) {
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[23752] | 137 | eval "\$self->${converter}::begin(\@_);";
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[22858] | 138 | }
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| 139 | }
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| 140 |
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| 141 | sub deinit {
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| 142 | my $self = shift (@_);
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| 143 |
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| 144 | foreach my $converter (@{$self->{'converter_list'}}) {
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[23752] | 145 | eval "\$self->${converter}::deinit(\@_);";
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[22858] | 146 | }
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| 147 |
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| 148 | }
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| 149 |
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| 150 | sub tmp_area_convert_file {
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| 151 | my $self = shift (@_);
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| 152 | my ($output_ext, $input_filename, $textref) = @_;
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| 153 |
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| 154 | foreach my $converter(@{$self->{'converter_list'}}) {
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| 155 | my ($var) = ($converter =~ m/(^.*)Converter$/);
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| 156 | $var = lc($var);
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| 157 | if ($self->{"${var}_conversion"}) {
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| 158 | my ($result, $result_str, $new_filename)
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| 159 | = eval "\$self->${converter}::convert(\$input_filename, \$output_ext);";
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| 160 | if ($result != 0) {
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| 161 | return $new_filename;
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| 162 | }
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| 163 | my $outhandle=$self->{'outhandle'};
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| 164 | print $outhandle "$converter Conversion error\n";
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| 165 | print $outhandle $result_str;
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| 166 | return "";
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| 167 | }
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| 168 | }
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| 169 |
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| 170 | # if got here, no converter was specified in plugin args
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| 171 | return $self->ConvertBinaryFile::tmp_area_convert_file(@_);
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| 172 |
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| 173 | }
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