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############################################### |
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# |
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# $Id: Abstract.pm,v 1.5 2002/11/17 07:12:06 joko Exp $ |
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# |
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# $Log: Abstract.pm,v $ |
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# Revision 1.5 2002/11/17 07:12:06 joko |
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# + extended ::getProperties with argument "want_transactions" |
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# |
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# Revision 1.4 2002/11/15 13:21:39 joko |
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# + added capability to propagate global schema options from schema module to tangram schema |
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# |
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# Revision 1.3 2002/11/09 01:27:23 joko |
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# + dependency of Class::Tangram now is 1.13 at minimum |
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# |
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# Revision 1.2 2002/10/25 11:45:10 joko |
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# + enhanced robustness |
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# + more logging for debug-levels |
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# |
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# Revision 1.1 2002/10/17 00:07:14 joko |
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# + new |
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# |
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# |
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############################################### |
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|
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# ==================================== |
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package Data::Storage::Schema::Abstract; |
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|
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use strict; |
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use warnings; |
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|
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use Tangram; |
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use Class::Tangram; |
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|
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use Tangram::RawDate; |
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use Tangram::RawTime; |
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use Tangram::RawDateTime; |
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|
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use Tangram::FlatArray; |
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use Tangram::FlatHash; |
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use Tangram::PerlDump; |
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|
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# get logger instance |
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my $logger = Log::Dispatch::Config->instance; |
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|
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|
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# ======== object constructor - %args to $self ======== |
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sub new { |
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my $invocant = shift; |
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my $class = ref($invocant) || $invocant; |
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my @args = (); |
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@_ && (@args = @_); |
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|
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$logger->debug( __PACKAGE__ . "->new" ); |
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|
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#my $self = { @_ }; |
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|
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# merge all entries from all hashes in args-array to single array (key, val, key, val) |
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my @args_all = (); |
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map { push(@args_all, %{$_}); } @args; |
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# make hash from array |
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my %args = @args_all; |
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|
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#$logger->debug( __PACKAGE__ . "->new( @args_all )" ); |
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|
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my $self = { %args }; |
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bless $self, $class; |
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|
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#use Data::Dumper; print Dumper($self); |
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|
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# remember as which Class we are instantiated |
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$self->{invocant} = $invocant; |
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|
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$self->_checkClassTangram(); |
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$self->_init(); |
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|
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return $self; |
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} |
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|
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sub _checkClassTangram { |
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my $self = shift; |
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# check version of "Class::Tangram" |
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my $ctversion = $Class::Tangram::VERSION; |
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#print "ctversion: ", $ctversion, "\n"; |
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#if ($ctversion ne 1.04) { |
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if ($ctversion lt 1.13) { |
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print "Version of \"Class::Tangram\": ", $ctversion, "\n"; |
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print "minimum required version : ", "1.13", "\n"; |
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#print "quitting!!! (please install older version (1.04) of \"Class::Tangram\"", "\n"; |
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exit; |
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} |
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} |
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|
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sub _parsePackageNamesFromFile { |
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my $self = shift; |
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my $filename = shift; |
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my $exclude_pattern = shift; |
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$logger->debug( __PACKAGE__ . "->_parsePackageFile( ... )" ); |
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if (!$filename) { |
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$logger->error( __PACKAGE__ . "->_parsePackageFile: you must specify a filename" ); |
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return; |
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} |
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if (! -e $filename) { |
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$logger->error( __PACKAGE__ . "->_parsePackageFile: could not find $filename" ); |
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} |
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my @packages = (); |
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open(FH, '<' . $filename); |
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while (<FH>) { |
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chomp(); |
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my $good = 1; |
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$exclude_pattern && ($good = !m/$exclude_pattern/); |
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push @packages, $1 if m/^package (.+?);/ && $good; |
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} |
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close(FH); |
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return \@packages; |
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} |
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|
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sub _doinit { |
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my $self = shift; |
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|
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$logger->debug( __PACKAGE__ . "->_doinit()" ); |
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|
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# WHAT? |
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# imports classes to Tangram-Schema in this style, but in an abstracted way: |
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# Class::Tangram::import_schema("SystemEvent"); |
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# TODO: |
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# move this code to Data::Storage::Schema::Tangram |
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|
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# TODO: |
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# two cases: |
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# 1. use a given list of strings as to-be-used-object-names |
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# 2. parse the content of the given package and use all declared Perl Packages as objects |
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|
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my $classlist = $self->{EXPORT_OBJECTS}; |
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|
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# parse complete package to build list of classes |
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if ($#{$classlist} == -1) { |
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$logger->debug( "_doinit() Initializing all Classes from " . $self->{invocant} ); |
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if (!$self->{invocant}->can('getFilename')) { |
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$logger->error( __PACKAGE__ . "->_doinit: Package $self->{invocant} doesn't contain method 'getFilename'" ); |
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return; |
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} |
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my $perl_packagefile = eval('return ' . $self->{invocant} . '::getFilename();'); |
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my $packages = $self->_parsePackageNamesFromFile($perl_packagefile, $self->{invocant}); |
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# TODO: |
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# cache list so this routine isn't called on every startup/request |
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$classlist = $packages; |
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} |
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|
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my $schema_properties = {}; |
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if ($self->{invocant}->can('getProperties')) { |
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# TODO: rework this! call by ref and/or do oo |
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#$schema_properties = eval('return ' . $self->{invocant} . '::getProperties();'); |
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$schema_properties = eval('return ' . $self->{invocant} . '::getProperties($self->{want_transactions});'); |
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} |
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|
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# build argument to be passed to "Tangram::Schema->new(...)" |
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my @classes; |
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map { |
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$logger->debug( __PACKAGE__ . "->_doinit: Initializing Class $_" ); |
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Class::Tangram::import_schema($_); |
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# classname |
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push @classes, $_; |
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# schema |
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my $schema; |
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my $evalstr = '$schema = $' . $_ . '::schema;'; |
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my $res = eval($evalstr); |
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push @classes, $schema; |
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} @{$classlist}; |
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|
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# build up the schema as a hash |
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my $schema = { |
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classes => \@classes, |
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}; |
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|
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# merge schema properties |
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foreach (keys %$schema_properties) { |
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$schema->{$_} = $schema_properties->{$_}; |
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} |
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|
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# create a new Tangram schema object |
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# a) these classes must occour in the same order used at a previous setup or |
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# b) better use class ids! |
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$self->{schema} = Tangram::Schema->new($schema); |
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return 1; |
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|
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=pod |
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# ====================================== |
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# schema template |
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$self->{schema} = Tangram::Schema->new({ |
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|
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classes => [ |
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# misc |
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'Person' => $Person::schema, |
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], |
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|
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make_object => sub { ... }, |
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set_id => sub { ... } |
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get_id => sub { ... } |
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normalize => sub { ... }, |
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|
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control => '...' |
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|
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sql => { ... }, |
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|
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}); |
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# ====================================== |
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=cut |
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|
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} |
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|
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sub _init { |
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my $self = shift; |
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if (!$self->{schema}) { |
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$self->_doinit(); |
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} |
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} |
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|
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# return schema |
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sub getSchema { |
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my $self = shift; |
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if (!$self->{schema}) { |
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#print "schema is not yet initialized!", "\n"; |
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#exit; |
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$logger->error( __PACKAGE__ . "->getSchema: Schema is not yet initialized!" ); |
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return; |
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} |
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return $self->{schema}; |
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} |
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