/[cvs]/nfo/perl/libs/Data/Transfer/Sync/Metadata.pm
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revision 1.1 by joko, Mon Jan 20 16:58:46 2003 UTC revision 1.3 by joko, Tue Feb 11 06:28:24 2003 UTC
# Line 6  Line 6 
6  ##  ##
7  ##    ----------------------------------------------------------------------------------------  ##    ----------------------------------------------------------------------------------------
8  ##    $Log$  ##    $Log$
9    ##    Revision 1.3  2003/02/11 06:28:24  joko
10    ##    + changes to metadata structure
11    ##
12    ##    Revision 1.2  2003/02/09 05:02:05  joko
13    ##    + major structure changes
14    ##    - refactored code to sister modules
15    ##
16  ##    Revision 1.1  2003/01/20 16:58:46  joko  ##    Revision 1.1  2003/01/20 16:58:46  joko
17  ##    + initial check-in: here they are....  ##    + initial check-in: here they are....
18  ##  ##
# Line 25  use mixin::with qw( Data::Transfer::Sync Line 32  use mixin::with qw( Data::Transfer::Sync
32    
33  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -   main  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -   main
34    
 # get logger instance  
 my $logger = Log::Dispatch::Config->instance;  
   
35  use Data::Dumper;  use Data::Dumper;
36    use libdb qw( quotesql );
37    use Data::Transform::Deep qw( refexpr2perlref );
38    
39    # get logger instance
40  sub _preCheckOptions {  my $logger = Log::Dispatch::Config->instance;
   
   my $self = shift;  
   my $opts = shift;  
   
 #print Dumper($opts);  
 #exit;  
   
   # the type of the to-be-synced item  
   if (!$opts->{source}->{nodeType}) {  
     $logger->error( __PACKAGE__ . "->_preCheckOptions failed: Please specify \"source-type\".");  
     return;  
   }  
   # the name of the (container-) node the items are listed in  
   if (!$opts->{source}->{nodeName}) {  
     $logger->error( __PACKAGE__ . "->_preCheckOptions failed: Please specify \"source-node\".");  
     return;  
   }  
   
   # a "map"-declaration which module to use for mapping- and/or lookup-purposes  
   if (!$opts->{map}) {  
     $logger->warning( __PACKAGE__ . "->_preCheckOptions: No mapping supplied - please check key 'map|mappings' in global configuration or specify additional argument '--mapping-module'.");  
     return;  
   }  
   if (!$opts->{map}->{moduleName}) {  
     $logger->warning( __PACKAGE__ . "->_preCheckOptions: Currently only perl-modules can provide mappings: Please specify one with '--mapping-module'.");  
     return;  
   }  
   
   return 1;  
   
 }  
   
 # TODO: refactor!!! take this list from already established/given metadata  
 sub _buildMetadataV1 {  
   my $self = shift;  
   
   # decompose identifiers for each partner  
   foreach ('source', 'target') {  
       
     # get/set metadata for further processing  
   
     # Partner and Node (e.g.: "L:Country" or "R:countries.csv")  
     if (my $item = $self->{args}->{$_}) {  
       my @item = split(':', $item);  
       $self->{meta}->{$_}->{dbkey} = $item[0];  
       $self->{meta}->{$_}->{node} = $item[1];  
     }  
       
     # Filter  
     if (my $item_filter = $self->{args}->{$_ . '_filter'}) {  
       $self->{meta}->{$_}->{filter} = $item_filter;  
     }  
   
     # IdentProvider  
     if (my $item_ident = $self->{args}->{$_ . '_ident'}) {  
       my @item_ident = split(':', $item_ident);  
       $self->{meta}->{$_}->{IdentProvider} = { method => $item_ident[0], arg => $item_ident[1] };  
     }  
   
 #print Dumper($self->{meta});  
   
     # TODO: ChecksumProvider  
   
     # exclude properties/subnodes  
     if (my $item_exclude = $self->{args}->{$_ . '_exclude'}) {  
       $self->{meta}->{$_}->{subnodes_exclude} = $item_exclude;  
     }  
       
     # TypeProvider  
     if (my $item_type = $self->{args}->{$_ . '_type'}) {  
       my @item_type = split(':', $item_type);  
       $self->{meta}->{$_}->{TypeProvider} = { method => $item_type[0], arg => $item_type[1] };  
     }  
       
     # Callbacks - writers (will be triggered _before_ writing to target)  
     if (my $item_writers = $self->{args}->{$_ . '_callbacks_write'}) {  
       my $descent = $_;     # this is important since the following code inside the map wants to use its own context variables  
       map { $self->{meta}->{$descent}->{Callback}->{write}->{$_}++; } @$item_writers;  
     }  
       
     # Callbacks - readers (will be triggered _after_ reading from source)  
     if (my $item_readers = $self->{args}->{$_ . '_callbacks_read'}) {  
       my $descent = $_;  
       map { $self->{meta}->{$descent}->{Callback}->{read}->{$_}++; } @$item_readers;  
     }  
       
     # resolve storage objects  
     #$self->{$_} = $self->{container}->{storage}->{$self->{meta}->{$_}->{dbkey}};  
     # relink references to metainfo  
     $self->{meta}->{$_}->{storage} = $self->{container}->{storage}->{$self->{meta}->{$_}->{dbkey}};  
     #print "iiiiisprov: ", Dumper($self->{meta}->{$_}->{storage}), "\n";  
   }  
   
 }  
   
41    
42  # TODO: refactor (still)!!! take this list from already established/given metadata ....  # TODO: refactor (still)!!! take this list from already established/given metadata ....
43  # .... also internally: passing around and mungling these metadata doesn't make sense anymore.  # .... also internally: passing around and mungling these metadata doesn't make sense anymore.
44  sub _buildMetadataV2 {  sub options2metadata {
45    my $self = shift;    my $self = shift;
46    
47  #print Dumper($self->{options});    $logger->debug( __PACKAGE__ . "->transformMetadata" );
48    
49      # trace
50        #print Dumper($self->{options});
51        #print Dumper($self->{args_raw});
52        #exit;
53    
54    # decompose identifiers for each partner    # decompose identifiers and write to metadata (for each descent)
55    foreach ('source', 'target') {    foreach ('source', 'target') {
56            
57      # get/set metadata for further processing      # get/set metadata for further processing
# Line 144  sub _buildMetadataV2 { Line 60  sub _buildMetadataV2 {
60      $self->{options}->{$_}->{nodeType} ||= '';      $self->{options}->{$_}->{nodeType} ||= '';
61      $self->{options}->{$_}->{nodeName} ||= '';      $self->{options}->{$_}->{nodeName} ||= '';
62    
63      # Partner and Node (e.g.: "L:Country" or "R:countries.csv")      # Partner and Node (compare the V1-notations: "L:Country" or "R:countries.csv")
64      $self->{meta}->{$_}->{dbKey} = $self->{options}->{$_}->{dbKey};      $self->{meta}->{$_}->{dbKey} = $self->{options}->{$_}->{dbKey};
65      $self->{meta}->{$_}->{nodeType} = $self->{options}->{$_}->{nodeType};      $self->{meta}->{$_}->{nodeType} = $self->{options}->{$_}->{nodeType};
66      $self->{meta}->{$_}->{nodeName} = $self->{options}->{$_}->{nodeName};      $self->{meta}->{$_}->{nodeName} = $self->{options}->{$_}->{nodeName};
67            
68      # Filter      # Filter
69      if (my $item_filter = $self->{args}->{$_ . '_filter'}) {      if (my $item_filter = $self->{options}->{$_}->{filter}) {
70        $self->{meta}->{$_}->{filter} = $item_filter;        $self->{meta}->{$_}->{filter} = $item_filter;
71      }      }
72    
# Line 161  sub _buildMetadataV2 { Line 77  sub _buildMetadataV2 {
77      }      }
78    
79      # TODO: ChecksumProvider      # TODO: ChecksumProvider
80        # already inside {options} - get it out from there and put into {meta} here!
81    
82      # exclude properties/subnodes      # exclude properties/subnodes
83      if (my $item_exclude = $self->{options}->{$_}->{exclude}) {      if (my $item_exclude = $self->{options}->{$_}->{exclude}) {
# Line 168  sub _buildMetadataV2 { Line 85  sub _buildMetadataV2 {
85      }      }
86            
87      # TypeProvider      # TypeProvider
88        # FIXME! this is still Vdeprecated!!!
89      if (my $item_type = $self->{args}->{$_ . '_type'}) {      if (my $item_type = $self->{args}->{$_ . '_type'}) {
90        my @item_type = split(':', $item_type);        my @item_type = split(':', $item_type);
91        $self->{meta}->{$_}->{TypeProvider} = { method => $item_type[0], arg => $item_type[1] };        $self->{meta}->{$_}->{TypeProvider} = { method => $item_type[0], arg => $item_type[1] };
92      }      }
93    
94        # trace
95          #print Dumper($self);
96          #exit;
97            
98      # Callbacks - writers (will be triggered _before_ writing to target)      # Callbacks - writers (will be triggered _before_ writing to target)
99      if (my $item_writers = $self->{args}->{$_ . '_callbacks_write'}) {      if (my $item_writers = $self->{options}->{$_}->{callbacks}->{write}) {
100        my $descent = $_;     # this is important since the following code inside the map wants to use its own context variables        my $descent = $_;     # this is important since the following code inside the map wants to use its own context variables
101        map { $self->{meta}->{$descent}->{Callback}->{write}->{$_}++; } @$item_writers;        map { $self->{meta}->{$descent}->{Callback}->{write}->{$_}++; } @$item_writers;
102      }      }
103            
104      # Callbacks - readers (will be triggered _after_ reading from source)      # Callbacks - readers (will be triggered _after_ reading from source)
105      if (my $item_readers = $self->{args}->{$_ . '_callbacks_read'}) {      if (my $item_readers = $self->{options}->{$_}->{callbacks}->{read}) {
106        my $descent = $_;        my $descent = $_;
107        map { $self->{meta}->{$descent}->{Callback}->{read}->{$_}++; } @$item_readers;        map { $self->{meta}->{$descent}->{Callback}->{read}->{$_}++; } @$item_readers;
108      }      }
109            
110      # resolve storage objects      # resolve storage handles
111      $self->{meta}->{$_}->{storage} = $self->{options}->{$_}->{storage}->{handle};        $self->{meta}->{$_}->{storage} = $self->{options}->{$_}->{storage}->{handle};
112    
113        # transfer storage handle options to metadata
114          #map { $self->{meta}->{$_}->{isIdentAuthority} = 1 } @{$self->{id_authorities}};
115          #map { $self->{meta}->{$_}->{isChecksumAuthority} = 1; } @{$self->{checksum_authorities}};
116          #map { $self->{meta}->{$_}->{isWriteProtected} = 1; } @{$self->{write_protected}};
117          #print Dumper($self->{options}->{$_});
118          #exit;
119          $self->{meta}->{$_}->{isIdentAuthority} = $self->{options}->{$_}->{storage}->{handle}->{locator}->{sync}->{isIdentAuthority};
120          $self->{meta}->{$_}->{isWriteProtected} = $self->{options}->{$_}->{storage}->{handle}->{locator}->{sync}->{isWriteProtected};
121          $self->{meta}->{$_}->{isChecksumAuthority} = $self->{options}->{$_}->{storage}->{handle}->{locator}->{sync}->{isChecksumAuthority};
122    
123    }    }
124    
125    #print Dumper($self->{meta});    #print Dumper($self->{meta});
# Line 195  sub _buildMetadataV2 { Line 128  sub _buildMetadataV2 {
128  }  }
129    
130    
131  sub _buildFieldmappingV1 {  sub options2metadata_accessor {
132    my $self = shift;    my $self = shift;
133    
134    # build mapping    $logger->debug( __PACKAGE__ . "->_transformMetadata_accessor" );
   # incoming: and Array of node map entries (Array or Hash) - e.g.  
   #   [ 'source:item_name' => 'target:class_val' ]  
   #   { source => 'event->startDateTime', target => 'begindate' }  
   foreach (@{$self->{args}->{mapping}}) {  
     if (ref $_ eq 'ARRAY') {  
       my @entry1 = split(':', $_->[0]);  
       my @entry2 = split(':', $_->[1]);  
       my $descent = [];  
       my $node = [];  
       $descent->[0] = $entry1[0];  
       $descent->[1] = $entry2[0];  
       $node->[0] = $entry1[1];  
       $node->[1] = $entry2[1];  
       push @{$self->{meta}->{$descent->[0]}->{childnodes}}, $node->[0];  
       push @{$self->{meta}->{$descent->[1]}->{childnodes}}, $node->[1];  
     } elsif (ref $_ eq 'HASH') {  
       foreach my $entry_key (keys %$_) {  
         my $entry_val = $_->{$entry_key};  
         push @{$self->{meta}->{$entry_key}->{childnodes}}, $entry_val;  
       }  
     }  
135    
136    }    # build accessor metadata (for each descent)
137      foreach my $descent ('source', 'target') {
138    
139    return 1;        # the database type plays a role here to handle special nodesets:
140          # there may be a) childless/non-strict nodesets (e.g. a CSV-file)
141          # or b) normal ones - here the node-name corresponds more or less directly to
142          # the physical location in the storage hierarchy below us (e.g. MAPI or LDAP)
143          # or c) sets of nodes which are physically mapped by node-type (e.g. a RDBMS or a ODBMS)
144          my $dbType = $self->{meta}->{$descent}->{storage}->{locator}->{type};
145          
146            # a, b and c are "accessor-type"s (of 'none', 'node-name', 'node-type')
147            # the following code resolves these types to '$accessorType'
148            # and properly sets '$accessorName'
149    
150            # don't continue for certain storage handlers
151              # HACK for DBD::CSV - re-enable for other DBDs
152              #next if $dbType eq 'DBI';
153      
154            # get nodename
155    
156              # get node-name
157                my $nodename = $self->{meta}->{$descent}->{node};   # V1
158                $nodename ||= $self->{meta}->{$descent}->{nodeName};    # V2
159    
160              # check if nodename is actually a CODEref, execute it to get a mapped/filtered target-nodename
161                #print "----", ref $nodename, "\n";
162                #if ($nodename =~ m/CODE/) {
163                #  print Dumper($self);
164                #  #exit;
165                #  $nodename = $nodename->($nodename);
166                #}
167    
168            # determine nodeset accessor -type and -name
169              # defaults
170              my $accessorType = 'none';
171              my $accessorName = '';
172              
173              # if explicit address was given in options, just use it!
174              if (my $address = $self->{options}->{$descent}->{address}) {
175                $accessorType = 'direct-address';
176                $accessorName = $address;
177              }
178              
179              # c)
180              elsif (($dbType eq 'DBI' || $dbType eq 'Tangram') && $self->{meta}->{$descent}->{nodeType}) {
181                $accessorType = 'node-type';
182                $accessorName = $self->{meta}->{$descent}->{nodeType};
183              }
184    
185              # b)
186              elsif ($nodename) {
187                $accessorType = 'node-name';
188                $accessorName = $nodename;
189              }
190    
191          # write accessor information to metadata
192          $self->{meta}->{$descent}->{accessorType} = $accessorType;
193          $self->{meta}->{$descent}->{accessorName} = $accessorName;
194        
195        }
196    
197      # trace
198        #print Dumper($self->{meta});
199        #print Dumper($self->{options});
200        #exit;
201    
202  }  }
203    
204    
205    
206    sub buildAttributeMap {
207    
208     my $self = shift;
209    
210      # field-structure for building sql
211      # mapping of sql-fieldnames to object-attributes
212        $self->{node}->{map} = {};
213    
214        # manually set ...
215          # ... object-id
216          $self->{node}->{map}->{$self->{meta}->{target}->{IdentProvider}->{arg}} = $self->{node}->{source}->{ident};
217          # ... checksum
218          $self->{node}->{map}->{cs} = $self->{node}->{source}->{checksum};
219    
220    #print "sqlmap: ", Dumper($self->{node}->{map}), "\n";
221    
222    #print Dumper($self);
223    #exit;
224    
225        # for transferring flat structures via simple (1:1) mapping
226        # TODO: diff per property / property value
227    
228        #if ($self->{args}->{mapping}) {
229          # apply mapping from $self->{args}->{mapping} to $self->{node}->{map}
230          #foreach my $key (@{$self->{meta}->{source}->{childnodes}}) {
231          my @childnodes = @{$self->{meta}->{source}->{childnodes}};
232          for (my $mapidx = 0; $mapidx <= $#childnodes; $mapidx++) {
233            #my $map_right = $self->{args}->{mapping}->{$key};
234            
235            $self->{node}->{source}->{propcache} = {};
236            $self->{node}->{target}->{propcache} = {};
237            
238            # get property name
239            $self->{node}->{source}->{propcache}->{property} = $self->{meta}->{source}->{childnodes}->[$mapidx];
240            $self->{node}->{target}->{propcache}->{property} = $self->{meta}->{target}->{childnodes}->[$mapidx];
241            #print "map: $map_right", "\n";
242    
243            # get property value
244            my $value;
245            
246            # detect for callback - old style - (maybe the better???)
247            if (ref($self->{node}->{target}->{map}) eq 'CODE') {
248              #$value = &$map_right($objClone);
249            } else {
250              # plain (scalar?) value
251              #$value = $objClone->{$map_right};
252              $self->{node}->{source}->{propcache}->{value} = $self->{node}->{source}->{payload}->{$self->{node}->{source}->{propcache}->{property}};
253            }
254            #$self->{node}->{map}->{$key} = $value;
255            
256            # detect expression
257            # for transferring deeply nested structures described by expressions
258            #print "val: $self->{node}->{source}->{propcache}->{value}", "\n";
259            if ($self->{node}->{source}->{propcache}->{property} =~ s/^expr://) {
260              
261              # create an anonymous sub to act as callback target dispatcher
262                my $cb_dispatcher = sub {
263                  #print "===============  CALLBACK DISPATCHER", "\n";
264                  #print "ident: ", $self->{node}->{source}->{ident}, "\n";
265                  #return $self->{node}->{source}->{ident};
266                  
267                };
268              
269    
270    #print Dumper($self->{node});
271              
272              # build callback map for helper function
273              #my $cbmap = { $self->{meta}->{source}->{IdentProvider}->{arg} => $cb_dispatcher };
274              my $cbmap = {};
275              my $value = refexpr2perlref($self->{node}->{source}->{payload}, $self->{node}->{source}->{propcache}->{property}, $cbmap);
276              $self->{node}->{source}->{propcache}->{value} = $value;
277            }
278    
279            # encode values dependent on type of underlying storage here - expand cases...
280            my $storage_type = $self->{meta}->{target}->{storage}->{locator}->{type};
281            if ($storage_type eq 'DBI') {
282              # ...for sql
283              # quotemeta?
284              $self->{node}->{source}->{propcache}->{value} = quotesql($self->{node}->{source}->{propcache}->{value});
285    
286            } elsif ($storage_type eq 'Tangram') {
287              # iso? utf8 already possible?
288            
289            } elsif ($storage_type eq 'LDAP') {
290              # TODO: encode utf8 here?
291    
292            }
293    
294            # store value to transfer map
295            $self->{node}->{map}->{$self->{node}->{target}->{propcache}->{property}} = $self->{node}->{source}->{propcache}->{value};
296    
297          }
298        #}
299    
300        
301      # TODO: $logger->dump( ... );
302      #$logger->debug( "sqlmap:" . "\n" . Dumper($self->{node}->{map}) );
303    #print "sqlmap: ", Dumper($self->{node}->{map}), "\n";
304    #print "entrystatus: ", Dumper($self->{node}), "\n";
305    
306    }
307    
308  1;  1;
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