/[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 1.4 by joko, Fri Feb 14 14:06:20 2003 UTC
# Line 6  Line 6 
6  ##  ##
7  ##    ----------------------------------------------------------------------------------------  ##    ----------------------------------------------------------------------------------------
8  ##    $Log$  ##    $Log$
9    ##    Revision 1.4  2003/02/14 14:06:20  joko
10    ##    + minor fix to old metadata structure
11    ##
12    ##    Revision 1.3  2003/02/11 06:28:24  joko
13    ##    + changes to metadata structure
14    ##
15    ##    Revision 1.2  2003/02/09 05:02:05  joko
16    ##    + major structure changes
17    ##    - refactored code to sister modules
18    ##
19  ##    Revision 1.1  2003/01/20 16:58:46  joko  ##    Revision 1.1  2003/01/20 16:58:46  joko
20  ##    + initial check-in: here they are....  ##    + initial check-in: here they are....
21  ##  ##
# Line 25  use mixin::with qw( Data::Transfer::Sync Line 35  use mixin::with qw( Data::Transfer::Sync
35    
36  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -   main  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -   main
37    
 # get logger instance  
 my $logger = Log::Dispatch::Config->instance;  
   
38  use Data::Dumper;  use Data::Dumper;
39    use libdb qw( quotesql );
40    use Data::Transform::Deep qw( refexpr2perlref );
41    
42    # get logger instance
43  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";  
   }  
   
 }  
   
44    
45  # TODO: refactor (still)!!! take this list from already established/given metadata ....  # TODO: refactor (still)!!! take this list from already established/given metadata ....
46  # .... 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.
47  sub _buildMetadataV2 {  sub options2metadata {
48    my $self = shift;    my $self = shift;
49    
50  #print Dumper($self->{options});    $logger->debug( __PACKAGE__ . "->transformMetadata" );
51    
52      # trace
53        #print Dumper($self->{options});
54        #print Dumper($self->{args_raw});
55        #exit;
56    
57    # decompose identifiers for each partner    # decompose identifiers and write to metadata (for each descent)
58    foreach ('source', 'target') {    foreach ('source', 'target') {
59            
60      # get/set metadata for further processing      # get/set metadata for further processing
# Line 144  sub _buildMetadataV2 { Line 63  sub _buildMetadataV2 {
63      $self->{options}->{$_}->{nodeType} ||= '';      $self->{options}->{$_}->{nodeType} ||= '';
64      $self->{options}->{$_}->{nodeName} ||= '';      $self->{options}->{$_}->{nodeName} ||= '';
65    
66      # Partner and Node (e.g.: "L:Country" or "R:countries.csv")      # Partner and Node (compare the V1-notations: "L:Country" or "R:countries.csv")
67      $self->{meta}->{$_}->{dbKey} = $self->{options}->{$_}->{dbKey};      $self->{meta}->{$_}->{dbKey} = $self->{options}->{$_}->{dbKey};
68      $self->{meta}->{$_}->{nodeType} = $self->{options}->{$_}->{nodeType};      $self->{meta}->{$_}->{nodeType} = $self->{options}->{$_}->{nodeType};
69      $self->{meta}->{$_}->{nodeName} = $self->{options}->{$_}->{nodeName};      $self->{meta}->{$_}->{nodeName} = $self->{options}->{$_}->{nodeName};
70            
71      # Filter      # Filter
72      if (my $item_filter = $self->{args}->{$_ . '_filter'}) {      if (my $item_filter = $self->{options}->{$_}->{filter}) {
73        $self->{meta}->{$_}->{filter} = $item_filter;        $self->{meta}->{$_}->{filter} = $item_filter;
74      }      }
75    
# Line 161  sub _buildMetadataV2 { Line 80  sub _buildMetadataV2 {
80      }      }
81    
82      # TODO: ChecksumProvider      # TODO: ChecksumProvider
83        # already inside {options} - get it out from there and put into {meta} here!
84    
85      # exclude properties/subnodes      # exclude properties/subnodes
86      if (my $item_exclude = $self->{options}->{$_}->{exclude}) {      if (my $item_exclude = $self->{options}->{$_}->{exclude}) {
# Line 168  sub _buildMetadataV2 { Line 88  sub _buildMetadataV2 {
88      }      }
89            
90      # TypeProvider      # TypeProvider
91      if (my $item_type = $self->{args}->{$_ . '_type'}) {      # FIXME! this is still Vdeprecated!!!
92        if (my $item_type = $self->{options}->{$_ . '_type'}) {
93        my @item_type = split(':', $item_type);        my @item_type = split(':', $item_type);
94        $self->{meta}->{$_}->{TypeProvider} = { method => $item_type[0], arg => $item_type[1] };        $self->{meta}->{$_}->{TypeProvider} = { method => $item_type[0], arg => $item_type[1] };
95      }      }
96    
97        # trace
98          #print Dumper($self);
99          #exit;
100            
101      # Callbacks - writers (will be triggered _before_ writing to target)      # Callbacks - writers (will be triggered _before_ writing to target)
102      if (my $item_writers = $self->{args}->{$_ . '_callbacks_write'}) {      if (my $item_writers = $self->{options}->{$_}->{callbacks}->{write}) {
103        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
104        map { $self->{meta}->{$descent}->{Callback}->{write}->{$_}++; } @$item_writers;        map { $self->{meta}->{$descent}->{Callback}->{write}->{$_}++; } @$item_writers;
105      }      }
106            
107      # Callbacks - readers (will be triggered _after_ reading from source)      # Callbacks - readers (will be triggered _after_ reading from source)
108      if (my $item_readers = $self->{args}->{$_ . '_callbacks_read'}) {      if (my $item_readers = $self->{options}->{$_}->{callbacks}->{read}) {
109        my $descent = $_;        my $descent = $_;
110        map { $self->{meta}->{$descent}->{Callback}->{read}->{$_}++; } @$item_readers;        map { $self->{meta}->{$descent}->{Callback}->{read}->{$_}++; } @$item_readers;
111      }      }
112            
113      # resolve storage objects      # resolve storage handles
114      $self->{meta}->{$_}->{storage} = $self->{options}->{$_}->{storage}->{handle};        $self->{meta}->{$_}->{storage} = $self->{options}->{$_}->{storage}->{handle};
115    
116        # transfer storage handle options to metadata
117          #map { $self->{meta}->{$_}->{isIdentAuthority} = 1 } @{$self->{id_authorities}};
118          #map { $self->{meta}->{$_}->{isChecksumAuthority} = 1; } @{$self->{checksum_authorities}};
119          #map { $self->{meta}->{$_}->{isWriteProtected} = 1; } @{$self->{write_protected}};
120          #print Dumper($self->{options}->{$_});
121          #exit;
122          $self->{meta}->{$_}->{isIdentAuthority} = $self->{options}->{$_}->{storage}->{handle}->{locator}->{sync}->{isIdentAuthority};
123          $self->{meta}->{$_}->{isWriteProtected} = $self->{options}->{$_}->{storage}->{handle}->{locator}->{sync}->{isWriteProtected};
124          $self->{meta}->{$_}->{isChecksumAuthority} = $self->{options}->{$_}->{storage}->{handle}->{locator}->{sync}->{isChecksumAuthority};
125    
126    }    }
127    
128    #print Dumper($self->{meta});    #print Dumper($self->{meta});
# Line 195  sub _buildMetadataV2 { Line 131  sub _buildMetadataV2 {
131  }  }
132    
133    
134  sub _buildFieldmappingV1 {  sub options2metadata_accessor {
135    my $self = shift;    my $self = shift;
136    
137    # 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;  
       }  
     }  
138    
139    }    # build accessor metadata (for each descent)
140      foreach my $descent ('source', 'target') {
141    
142    return 1;        # the database type plays a role here to handle special nodesets:
143          # there may be a) childless/non-strict nodesets (e.g. a CSV-file)
144          # or b) normal ones - here the node-name corresponds more or less directly to
145          # the physical location in the storage hierarchy below us (e.g. MAPI or LDAP)
146          # or c) sets of nodes which are physically mapped by node-type (e.g. a RDBMS or a ODBMS)
147          my $dbType = $self->{meta}->{$descent}->{storage}->{locator}->{type};
148          
149            # a, b and c are "accessor-type"s (of 'none', 'node-name', 'node-type')
150            # the following code resolves these types to '$accessorType'
151            # and properly sets '$accessorName'
152    
153            # don't continue for certain storage handlers
154              # HACK for DBD::CSV - re-enable for other DBDs
155              #next if $dbType eq 'DBI';
156      
157            # get nodename
158    
159              # get node-name
160                my $nodename = $self->{meta}->{$descent}->{node};   # V1
161                $nodename ||= $self->{meta}->{$descent}->{nodeName};    # V2
162    
163              # check if nodename is actually a CODEref, execute it to get a mapped/filtered target-nodename
164                #print "----", ref $nodename, "\n";
165                #if ($nodename =~ m/CODE/) {
166                #  print Dumper($self);
167                #  #exit;
168                #  $nodename = $nodename->($nodename);
169                #}
170    
171            # determine nodeset accessor -type and -name
172              # defaults
173              my $accessorType = 'none';
174              my $accessorName = '';
175              
176              # if explicit address was given in options, just use it!
177              if (my $address = $self->{options}->{$descent}->{address}) {
178                $accessorType = 'direct-address';
179                $accessorName = $address;
180              }
181              
182              # c)
183              elsif (($dbType eq 'DBI' || $dbType eq 'Tangram') && $self->{meta}->{$descent}->{nodeType}) {
184                $accessorType = 'node-type';
185                $accessorName = $self->{meta}->{$descent}->{nodeType};
186              }
187    
188              # b)
189              elsif ($nodename) {
190                $accessorType = 'node-name';
191                $accessorName = $nodename;
192              }
193    
194          # write accessor information to metadata
195          $self->{meta}->{$descent}->{accessorType} = $accessorType;
196          $self->{meta}->{$descent}->{accessorName} = $accessorName;
197        
198        }
199    
200      # trace
201        #print Dumper($self->{meta});
202        #print Dumper($self->{options});
203        #exit;
204    
205  }  }
206    
207    
208    
209    sub buildAttributeMap {
210    
211     my $self = shift;
212    
213      # field-structure for building sql
214      # mapping of sql-fieldnames to object-attributes
215        $self->{node}->{map} = {};
216    
217        # manually set ...
218          # ... object-id
219          $self->{node}->{map}->{$self->{meta}->{target}->{IdentProvider}->{arg}} = $self->{node}->{source}->{ident};
220          # ... checksum
221          $self->{node}->{map}->{cs} = $self->{node}->{source}->{checksum};
222    
223    #print "sqlmap: ", Dumper($self->{node}->{map}), "\n";
224    
225    #print Dumper($self);
226    #exit;
227    
228        # for transferring flat structures via simple (1:1) mapping
229        # TODO: diff per property / property value
230    
231        #if ($self->{args}->{mapping}) {
232          # apply mapping from $self->{args}->{mapping} to $self->{node}->{map}
233          #foreach my $key (@{$self->{meta}->{source}->{childnodes}}) {
234          my @childnodes = @{$self->{meta}->{source}->{childnodes}};
235          for (my $mapidx = 0; $mapidx <= $#childnodes; $mapidx++) {
236            #my $map_right = $self->{args}->{mapping}->{$key};
237            
238            $self->{node}->{source}->{propcache} = {};
239            $self->{node}->{target}->{propcache} = {};
240            
241            # get property name
242            $self->{node}->{source}->{propcache}->{property} = $self->{meta}->{source}->{childnodes}->[$mapidx];
243            $self->{node}->{target}->{propcache}->{property} = $self->{meta}->{target}->{childnodes}->[$mapidx];
244            #print "map: $map_right", "\n";
245    
246            # get property value
247            my $value;
248            
249            # detect for callback - old style - (maybe the better???)
250            if (ref($self->{node}->{target}->{map}) eq 'CODE') {
251              #$value = &$map_right($objClone);
252            } else {
253              # plain (scalar?) value
254              #$value = $objClone->{$map_right};
255              $self->{node}->{source}->{propcache}->{value} = $self->{node}->{source}->{payload}->{$self->{node}->{source}->{propcache}->{property}};
256            }
257            #$self->{node}->{map}->{$key} = $value;
258            
259            # detect expression
260            # for transferring deeply nested structures described by expressions
261            #print "val: $self->{node}->{source}->{propcache}->{value}", "\n";
262            if ($self->{node}->{source}->{propcache}->{property} =~ s/^expr://) {
263              
264              # create an anonymous sub to act as callback target dispatcher
265                my $cb_dispatcher = sub {
266                  #print "===============  CALLBACK DISPATCHER", "\n";
267                  #print "ident: ", $self->{node}->{source}->{ident}, "\n";
268                  #return $self->{node}->{source}->{ident};
269                  
270                };
271              
272    
273    #print Dumper($self->{node});
274              
275              # build callback map for helper function
276              #my $cbmap = { $self->{meta}->{source}->{IdentProvider}->{arg} => $cb_dispatcher };
277              my $cbmap = {};
278              my $value = refexpr2perlref($self->{node}->{source}->{payload}, $self->{node}->{source}->{propcache}->{property}, $cbmap);
279              $self->{node}->{source}->{propcache}->{value} = $value;
280            }
281    
282            # encode values dependent on type of underlying storage here - expand cases...
283            my $storage_type = $self->{meta}->{target}->{storage}->{locator}->{type};
284            if ($storage_type eq 'DBI') {
285              # ...for sql
286              # quotemeta?
287              $self->{node}->{source}->{propcache}->{value} = quotesql($self->{node}->{source}->{propcache}->{value});
288    
289            } elsif ($storage_type eq 'Tangram') {
290              # iso? utf8 already possible?
291            
292            } elsif ($storage_type eq 'LDAP') {
293              # TODO: encode utf8 here?
294    
295            }
296    
297            # store value to transfer map
298            $self->{node}->{map}->{$self->{node}->{target}->{propcache}->{property}} = $self->{node}->{source}->{propcache}->{value};
299    
300          }
301        #}
302    
303        
304      # TODO: $logger->dump( ... );
305      #$logger->debug( "sqlmap:" . "\n" . Dumper($self->{node}->{map}) );
306    #print "sqlmap: ", Dumper($self->{node}->{map}), "\n";
307    #print "entrystatus: ", Dumper($self->{node}), "\n";
308    
309    }
310    
311  1;  1;
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