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## $Id$ |
## $Id$ |
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## -------------------------------------------------------------------------------- |
## -------------------------------------------------------------------------------- |
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## $Log$ |
## $Log$ |
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## Revision 1.10 2003/02/20 20:50:32 joko |
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## + small exception handling: now inheriting from little Exception object |
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## |
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## Revision 1.9 2003/02/18 18:35:30 joko |
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## + encapsulated/abstracted some more functionality: sub load_single |
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## |
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## Revision 1.8 2003/02/14 14:20:05 joko |
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## + modified mixin behaviour |
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## |
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## Revision 1.7 2003/02/11 10:34:19 joko |
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## + loaded module may now lack 'mixin::with' declaration |
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## + this gets us the possibility to load modules from any perl namespace |
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## + enabled this mechanism |
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## |
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## Revision 1.6 2003/02/09 16:22:51 joko |
## Revision 1.6 2003/02/09 16:22:51 joko |
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## + pseudo constructor mechanism via options |
## + pseudo constructor mechanism via options |
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## |
## |
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use strict; |
use strict; |
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use warnings; |
use warnings; |
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use base qw( DesignPattern::Object ); |
use base qw( |
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DesignPattern::Object |
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DesignPattern::Exception |
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); |
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use Data::Dumper; |
use Data::Dumper; |
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## ======== object inheritance ======== |
## ======== object inheritance ======== |
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# TODO: |
# TODO / REFACTORING PROPOSAL |
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# leading from Data::Storage to code abstracted out into this module - DesignPattern::Bridge |
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# - this is no inheritance and it doesn't have to be |
# - this is no inheritance and it doesn't have to be |
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# - implement this module as a bridge to its sub-modules |
# - implement this module as a bridge to its sub-modules |
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# - use the BridgePattern (http://c2.com/cgi/wiki?BridgePattern) |
# - use the BridgePattern (http://c2.com/cgi/wiki?BridgePattern) |
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# - sub getChildNodes |
# - sub getChildNodes |
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# - sub run |
# - sub run |
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# 2003-02-11, joko: does this have anything in parallel with CPAN's Class::Inner? |
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# get logger instance |
# get logger instance |
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my $logger = eval { Log::Dispatch::Config->instance; }; |
my $logger = eval { Log::Dispatch::Config->instance; }; |
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my $meta; |
my $meta; |
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## ======== object constructor ======== |
## ======== object constructor ======== |
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sub new { |
sub new { |
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my $invocant = shift; |
my $invocant = shift; |
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my $class = ref($invocant) || $invocant; |
my $class = ref($invocant) || $invocant; |
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my @args = (); |
my @args = (); |
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@_ && (@args = @_); |
@_ && (@args = @_); |
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$logger->debug( __PACKAGE__ . "->new(@args)" ) if $logger; |
$logger->debug( __PACKAGE__ . "->new(@args)" ) if $logger; |
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my $self = { @_ }; |
my $self = { @_ }; |
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# trace |
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#print "class: $class", "\n"; |
#print "class: $class", "\n"; |
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bless $self, $class; |
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##if (my $bizWorks = shift) { |
# create instance |
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##$self->boot($bizWorks); |
bless $self, $class; |
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##} |
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return $self; |
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return $self; |
} |
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} |
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## ======== method overrider ======== |
## ======== method overrider ======== |
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# build full package name |
# build full package name |
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my $self_classname = ref $self; |
my $self_classname = ref $self; |
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my $package = $self_classname . '::' . $modulename_load; |
# name |
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my $package = $modulename_load; |
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# if package is absolute, cut away prefix ('/' or '::') |
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if ($package !~ s/^:://) { |
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# else: prefix with base classname if above name is relative (lacks of '/' or '::') |
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$package = $self_classname . '::' . $package |
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} |
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return $package; |
return $package; |
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} |
} |
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sub load { |
sub load { |
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my $self = shift; |
my $self = shift; |
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my $modulename = shift; |
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my $options = shift; |
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if (ref $modulename eq 'ARRAY') { |
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foreach (@$modulename) { |
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$self->load_single($_, $options); |
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} |
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} else { |
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$self->load_single($modulename, $options); |
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} |
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} |
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sub load_single { |
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my $self = shift; |
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my $modulename_load = shift; |
my $modulename_load = shift; |
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my $options = shift; |
my $options = shift; |
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# this is the module testing phase - use mixin doesn't seem to propagate errors by default |
# this is the module testing phase - use mixin doesn't seem to propagate errors by default |
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eval("use $package;"); |
eval("use $package;"); |
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$self->checkExceptions(); |
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=pod |
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if ($@) { |
if ($@) { |
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$meta->{loaded}->{$package} = 0; |
$meta->{loaded}->{$package} = 0; |
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# include caller information |
# include caller information |
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print $msg, "\n"; |
print $msg, "\n"; |
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} |
} |
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} |
} |
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=cut |
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#print "ref-1: ", ref $self, "\n"; |
#print "ref-1: ", ref $self, "\n"; |
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#print "ref-2: ", ref $self::SUPER, "\n"; |
#print "ref-2: ", ref $self::SUPER, "\n"; |
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#bless $self, $package; |
#bless $self, $package; |
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# V2: |
# V2: |
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# switch into foreign package and mixin plugin-module |
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$self->mixinPackage($package); |
$self->mixinPackage($package); |
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if (my $method = $options->{method}) { |
if (my $method = $options->{method}) { |
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$self->$method(); |
$self->$method(); |
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} |
} |
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return 1; |
return 1; |
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} |
} |
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sub mixinPackage { |
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my $self = shift; |
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my $package = shift; |
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# switch into foreign package and prepare for mixin |
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$self->mixin_prepare($package); |
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# switch into local package (scope which uses DesignPattern::Bridge) and mixin plugin-module |
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$self->mixin_do($package); |
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} |
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# TODO: maybe refactor to DesignPattern::Object? what about the '$logger'? |
# TODO: maybe refactor to DesignPattern::Object? what about the '$logger'? |
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sub mixinPackage { |
sub mixin_prepare { |
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my $self = shift; |
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my $package = shift; |
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my $self_classname = ref $self; |
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eval("package $package; use mixin::with '$self_classname';"); |
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# FIXME: --- this is redundant --- |
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if ($@) { |
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$meta->{loaded}->{$package} = 0; |
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$logger->error( __PACKAGE__ . "->load: $@" ) if $logger; |
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} else { |
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$meta->{loaded}->{$package} = 1; |
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} |
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# FIXME: --- this is redundant --- |
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} |
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sub mixin_do { |
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my $self = shift; |
my $self = shift; |
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my $package = shift; |
my $package = shift; |
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# switch into foreign package and mixin plugin-module |
# switch into foreign package and mixin plugin-module |
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my $self_classname = ref $self; |
my $self_classname = ref $self; |
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eval("package $self_classname; use mixin '$package';"); |
eval("package $self_classname; use mixin '$package';"); |
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#eval("use mixin_all '$package';"); |
#eval("use mixin_all '$package';"); |
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# FIXME: --- this is redundant --- |
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if ($@) { |
if ($@) { |
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$meta->{loaded}->{$package} = 0; |
$meta->{loaded}->{$package} = 0; |
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$logger->error( __PACKAGE__ . "->load: $@" ) if $logger; |
$logger->error( __PACKAGE__ . "->load: $@" ) if $logger; |
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} else { |
} else { |
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$meta->{loaded}->{$package} = 1; |
$meta->{loaded}->{$package} = 1; |
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} |
} |
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# FIXME: --- this is redundant --- |
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} |
} |
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sub unload { |
sub unload { |
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} |
} |
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1; |
1; |
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__END__ |