--- nfo/perl/libs/Data/Mungle/Compare/Struct.pm	2002/11/29 04:49:30	1.1
+++ nfo/perl/libs/Data/Mungle/Compare/Struct.pm	2004/05/12 13:53:19	1.6
@@ -1,14 +1,30 @@
 ##    --------------------------------------------------------------------------------
-##    $Id: Struct.pm,v 1.1 2002/11/29 04:49:30 joko Exp $
+##    $Id: Struct.pm,v 1.6 2004/05/12 13:53:19 jonen Exp $
 ##    --------------------------------------------------------------------------------
 ##    $Log: Struct.pm,v $
+##    Revision 1.6  2004/05/12 13:53:19  jonen
+##    + bugfix related to declaration of arrays,
+##        solved error: 'Bizarre copy of ARRAY in aassign at...'
+##
+##    Revision 1.5  2003/03/27 15:17:05  joko
+##    namespace fixes for Data::Mungle::*
+##
+##    Revision 1.4  2002/12/19 01:06:27  joko
+##    + fixed isEmpty with ARRAYs
+##
+##    Revision 1.3  2002/12/13 21:47:04  joko
+##    + fixes to 'sub isEmpty'
+##
+##    Revision 1.2  2002/12/05 07:56:34  joko
+##    + updated/enhanced isEmpty (hacky?)
+##
 ##    Revision 1.1  2002/11/29 04:49:30  joko
 ##    + initial check-in
 ##
 ##    --------------------------------------------------------------------------------
 
 
-package Data::Compare::Struct;
+package Data::Mungle::Compare::Struct;
 
 use strict;
 use warnings;
@@ -29,7 +45,17 @@
   my @a = @{$a_ref};
   my @b = @{$b_ref};
 
-  my @isect = my @diff = my @union = ();
+  # BUGFIX 2004-05-12: following declaration of arrays occures an strange perl error:
+  # 'Bizarre copy of ARRAY in aassign at ..<PATH_TO>/<THIS_FILE> line <NEXT LINE>' 
+  # (at PERL 5.8.4, Debian/unstable/experimental)
+  #
+  #my @isect = my @diff = my @union = ();
+  #
+  # so use normal declaration instead!!
+  my @isect = ();
+  my @diff = ();
+  my @union = ();
+
   my $e;
   my %count;
   
@@ -59,21 +85,90 @@
 }
 
 sub isEmpty {
+
   my $var = shift;
-  my $reftype = attributes::reftype($var);
+  my $ref = ref($var);
+  my $reftype = '';
+  $reftype = attributes::reftype($var) if $ref;
 
-  if ($reftype eq 'HASH') {
-    foreach (keys %$var) {
-      return 0 if defined $var->{$_};
+  #print "isEmpty is parsing variable ( ref $ref reftype $reftype )", "\n";
+  
+#print Dumper($var);
+  
+  my $found;
+
+  if ($ref eq 'Set::Object') {
+    $found = 1;
+#print "members:", "\n";
+#print Dumper($var->members());
+#print "\n";
+    my $tc = { ok => 0, count => 0, empty => 0 };
+    foreach ($var->members()) {
+#print "member!!", "\n";
+      #print "empty: ", isEmpty($_), "\n";
+      #$tc->{ok} = 1;
+      $tc->{count}++;
+      $tc->{empty}++ if isEmpty($_);
+      #return $result if $result;
     }
 
-  } elsif ($reftype eq 'ARRAY') {
-    foreach (@$var) {
-      return 0 if defined $_;
+#print Dumper($tc);
+    
+    return 1 if ($tc->{count} == $tc->{empty});
+    return 0;
+    
+  }
+
+  if ($reftype eq 'ARRAY') {
+    my @arr = @$var;
+    my $isReallyEmpty = ($#arr == -1 ? 1 : 0);
+    return 1 if $isReallyEmpty;
+    $found = 1;
+    foreach (@arr) {
+      #return 0 if defined $_;
+      #return 1 if isEmpty($_);
+      return 0 if !isEmpty($_);
+    }
+
+  } elsif ($reftype eq 'HASH') {
+    my $empty = 1;
+    $found = 1;
+    foreach (keys %$var) {
+# TODO: review and fix this!
+=pod
+      # recursion
+      if (ref $var->{$_} eq 'Set::Object') {
+        print "==========set", "\n";
+        if (isEmpty($var->{$_})) {
+          return 0;
+          #next;
+        }
+      }
+=cut
+      next if ref $var->{$_} eq 'Set::Object';
+      #return 0 if defined $var->{$_};
+      #return 1 if isEmpty($var->{$_});
+      my $elem_empty = isEmpty($var->{$_});
+      
+#print "elem: $elem_empty\n";
+      $empty &&= $elem_empty;
     }
+    return $empty;
+    #return 0;
+  
+  } else {
+    $found = 1;
+    return 0 if defined $var;
+  }
+  
+  if (!$found) {
+    print "isEmpty could not parse variable ( ref $ref reftype $reftype )", "\n";
   }
 
+  #print "EMPTY!!!", "\n";
+
   return 1;
+  
 }
 
 1;