/[cvs]/nfo/perl/libs/DesignPattern/Bridge.pm
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revision 1.3 by joko, Mon Dec 16 19:57:12 2002 UTC revision 1.5 by root, Fri Jan 31 01:19:50 2003 UTC
# Line 2  Line 2 
2  ##  $Id$  ##  $Id$
3  ## --------------------------------------------------------------------------------  ## --------------------------------------------------------------------------------
4  ##  $Log$  ##  $Log$
5    ##  Revision 1.5  2003/01/31 01:19:50  root
6    ##  + fixed: doesn't need Log::Dispatch any more, but uses it if available
7    ##
8    ##  Revision 1.4  2003/01/20 16:55:15  joko
9    ##  + sub mixinPackage
10    ##  + sub include
11    ##
12  ##  Revision 1.3  2002/12/16 19:57:12  joko  ##  Revision 1.3  2002/12/16 19:57:12  joko
13  ##  + sub unload  ##  + sub unload
14  ##  ##
# Line 37  use Data::Dumper; Line 44  use Data::Dumper;
44  #   - sub run  #   - sub run
45    
46  # get logger instance  # get logger instance
47  my $logger = Log::Dispatch::Config->instance;  my $logger = eval { Log::Dispatch::Config->instance; };
48        
49  my $meta;  my $meta;
50    
# Line 47  my $meta; Line 54  my $meta;
54      my $class = ref($invocant) || $invocant;      my $class = ref($invocant) || $invocant;
55      my @args = ();      my @args = ();
56      @_ && (@args = @_);      @_ && (@args = @_);
57      $logger->debug( __PACKAGE__ . "->new(@args)" );      $logger->debug( __PACKAGE__ . "->new(@args)" ) if $logger;
58      my $self = { @_ };      my $self = { @_ };
59      #print "class: $class", "\n";      #print "class: $class", "\n";
60      bless $self, $class;      bless $self, $class;
# Line 70  my $meta; Line 77  my $meta;
77      my $method = $AUTOLOAD;      my $method = $AUTOLOAD;
78      $method =~ s/^.*:://;      $method =~ s/^.*:://;
79        
80      $logger->debug( __PACKAGE__ . "->" . $method . "(@_)" . " (AUTOLOAD called, not dispatched)" );      $logger->debug( __PACKAGE__ . "->" . $method . "(@_)" . " (AUTOLOAD called, not dispatched)" ) if $logger;
81    
82      ## ->DESTROY would - if not declared - trigger an AUTOLOAD also      ## ->DESTROY would - if not declared - trigger an AUTOLOAD also
83      return if $method =~ m/::DESTROY$/;      return if $method =~ m/::DESTROY$/;
# Line 100  my $meta; Line 107  my $meta;
107      my $self = shift;      my $self = shift;
108      my $modulename_load = shift;      my $modulename_load = shift;
109    
110        my $self_modulename = ref $self;
111      my $package = $self->_getPluginPackage($modulename_load);      my $package = $self->_getPluginPackage($modulename_load);
112            
113      if ($meta->{loaded}->{$package}) {      if ($meta->{loaded}->{$package}) {
114        return 1;        return 1;
115      }      }
116            
117      $logger->info( __PACKAGE__ . "->load: $package" );      #$logger->info( __PACKAGE__ . "->load: $package" ) if $logger;
118        #$logger->info( __PACKAGE__ . "->load: $self_modulename" ) if $logger;
119        $logger->debug( $self_modulename . "->load: $package\t[via " . __PACKAGE__ . "]" ) if $logger;
120    
121      # 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
122      eval("use $package;");      eval("use $package;");
# Line 115  my $meta; Line 125  my $meta;
125        # include caller information        # include caller information
126        my @caller = caller;        my @caller = caller;
127        my $caller_msg = $caller[1] . ':' . $caller[2];        my $caller_msg = $caller[1] . ':' . $caller[2];
128        $logger->error( __PACKAGE__ . "->load: $@ ($caller_msg)" );        my $msg =  __PACKAGE__ . "->load: $@ ($caller_msg)";
129          if ($logger) {
130            $logger->error($msg);
131          } else {
132            print $msg, "\n";
133          }
134      }      }
135    
136  #print "ref-1: ", ref $self, "\n";  #print "ref-1: ", ref $self, "\n";
# Line 126  my $meta; Line 141  my $meta;
141    
142      # V2:      # V2:
143      # switch into foreign package and mixin plugin-module      # switch into foreign package and mixin plugin-module
144        $self->mixinPackage($package);
145    
146        return 1;
147        
148      }
149    
150      # TODO: maybe refactor to DesignPattern::Object? what about the '$logger'?
151      sub mixinPackage {
152        my $self = shift;
153        my $package = shift;
154        # switch into foreign package and mixin plugin-module
155      my $self_classname = ref $self;      my $self_classname = ref $self;
156      eval("package $self_classname; use mixin '$package';");      eval("package $self_classname; use mixin '$package';");
157      #eval("use mixin_all '$package';");      #eval("use mixin_all '$package';");
158      if ($@) {      if ($@) {
159        $meta->{loaded}->{$package} = 0;        $meta->{loaded}->{$package} = 0;
160        $logger->error( __PACKAGE__ . "->load: $@" );        $logger->error( __PACKAGE__ . "->load: $@" ) if $logger;
161      } else {      } else {
162        $meta->{loaded}->{$package} = 1;        $meta->{loaded}->{$package} = 1;
163      }      }
   
     return 1;  
       
164    }    }
165    
166    sub unload {    sub unload {
# Line 150  my $meta; Line 173  my $meta;
173      if ($meta->{loaded}->{$package}) {      if ($meta->{loaded}->{$package}) {
174        $meta->{loaded}->{$package} = 0;        $meta->{loaded}->{$package} = 0;
175        my $where = __PACKAGE__ . ':' . __LINE__;        my $where = __PACKAGE__ . ':' . __LINE__;
176        $logger->debug( __PACKAGE__ . "->unload: FIXME: DESTROY object is not implemented at '$where'." );        $logger->debug( __PACKAGE__ . "->unload: FIXME: DESTROY object is not implemented at '$where'." ) if $logger;
177      }      }
178    
179    }    }
# Line 160  my $meta; Line 183  my $meta;
183      my $self = shift;      my $self = shift;
184      $self->_abstract_function('boot');      $self->_abstract_function('boot');
185    }    }
186      
187      sub include {
188        my $self = shift;
189        my $includefile = shift;
190        my $package = shift;
191        # TODO: do better error-detection here / prevent dies under all circumstances!
192        require $includefile;
193        $self->mixinPackage($package) if $package;
194      }
195    
196  1;  1;
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