/[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 1.5 by joko, Fri Feb 21 08:34:58 2003 UTC
# Line 6  Line 6 
6  ##  ##
7  ##    ----------------------------------------------------------------------------------------  ##    ----------------------------------------------------------------------------------------
8  ##    $Log$  ##    $Log$
9    ##    Revision 1.5  2003/02/21 08:34:58  joko
10    ##    modified object hierarchy
11    ##    renamed method
12    ##
13    ##    Revision 1.4  2003/02/14 14:06:20  joko
14    ##    + minor fix to old metadata structure
15    ##
16    ##    Revision 1.3  2003/02/11 06:28:24  joko
17    ##    + changes to metadata structure
18    ##
19    ##    Revision 1.2  2003/02/09 05:02:05  joko
20    ##    + major structure changes
21    ##    - refactored code to sister modules
22    ##
23  ##    Revision 1.1  2003/01/20 16:58:46  joko  ##    Revision 1.1  2003/01/20 16:58:46  joko
24  ##    + initial check-in: here they are....  ##    + initial check-in: here they are....
25  ##  ##
# Line 25  use mixin::with qw( Data::Transfer::Sync Line 39  use mixin::with qw( Data::Transfer::Sync
39    
40  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -   main  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -   main
41    
 # get logger instance  
 my $logger = Log::Dispatch::Config->instance;  
   
42  use Data::Dumper;  use Data::Dumper;
43    use libdb qw( quotesql );
44    use Data::Code::Ref qw( ref_slot );
45    
46    # get logger instance
47  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";  
   }  
   
 }  
   
48    
49  # TODO: refactor (still)!!! take this list from already established/given metadata ....  # TODO: refactor (still)!!! take this list from already established/given metadata ....
50  # .... 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.
51  sub _buildMetadataV2 {  sub options2metadata {
52    my $self = shift;    my $self = shift;
53    
54  #print Dumper($self->{options});    $logger->debug( __PACKAGE__ . "->transformMetadata" );
55    
56    # decompose identifiers for each partner    # trace
57        #print Dumper($self->{options});
58        #print Dumper($self->{args_raw});
59        #exit;
60    
61      # decompose identifiers and write to metadata (for each descent)
62    foreach ('source', 'target') {    foreach ('source', 'target') {
63            
64      # get/set metadata for further processing      # get/set metadata for further processing
# Line 144  sub _buildMetadataV2 { Line 67  sub _buildMetadataV2 {
67      $self->{options}->{$_}->{nodeType} ||= '';      $self->{options}->{$_}->{nodeType} ||= '';
68      $self->{options}->{$_}->{nodeName} ||= '';      $self->{options}->{$_}->{nodeName} ||= '';
69    
70      # Partner and Node (e.g.: "L:Country" or "R:countries.csv")      # Partner and Node (compare the V1-notations: "L:Country" or "R:countries.csv")
71      $self->{meta}->{$_}->{dbKey} = $self->{options}->{$_}->{dbKey};      $self->{meta}->{$_}->{dbKey} = $self->{options}->{$_}->{dbKey};
72      $self->{meta}->{$_}->{nodeType} = $self->{options}->{$_}->{nodeType};      $self->{meta}->{$_}->{nodeType} = $self->{options}->{$_}->{nodeType};
73      $self->{meta}->{$_}->{nodeName} = $self->{options}->{$_}->{nodeName};      $self->{meta}->{$_}->{nodeName} = $self->{options}->{$_}->{nodeName};
74            
75      # Filter      # Filter
76      if (my $item_filter = $self->{args}->{$_ . '_filter'}) {      if (my $item_filter = $self->{options}->{$_}->{filter}) {
77        $self->{meta}->{$_}->{filter} = $item_filter;        $self->{meta}->{$_}->{filter} = $item_filter;
78      }      }
79    
# Line 161  sub _buildMetadataV2 { Line 84  sub _buildMetadataV2 {
84      }      }
85    
86      # TODO: ChecksumProvider      # TODO: ChecksumProvider
87        # already inside {options} - get it out from there and put into {meta} here!
88    
89      # exclude properties/subnodes      # exclude properties/subnodes
90      if (my $item_exclude = $self->{options}->{$_}->{exclude}) {      if (my $item_exclude = $self->{options}->{$_}->{exclude}) {
# Line 168  sub _buildMetadataV2 { Line 92  sub _buildMetadataV2 {
92      }      }
93            
94      # TypeProvider      # TypeProvider
95      if (my $item_type = $self->{args}->{$_ . '_type'}) {      # FIXME! this is still Vdeprecated!!!
96        if (my $item_type = $self->{options}->{$_ . '_type'}) {
97        my @item_type = split(':', $item_type);        my @item_type = split(':', $item_type);
98        $self->{meta}->{$_}->{TypeProvider} = { method => $item_type[0], arg => $item_type[1] };        $self->{meta}->{$_}->{TypeProvider} = { method => $item_type[0], arg => $item_type[1] };
99      }      }
100    
101        # trace
102          #print Dumper($self);
103          #exit;
104            
105      # Callbacks - writers (will be triggered _before_ writing to target)      # Callbacks - writers (will be triggered _before_ writing to target)
106      if (my $item_writers = $self->{args}->{$_ . '_callbacks_write'}) {      if (my $item_writers = $self->{options}->{$_}->{callbacks}->{write}) {
107        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
108        map { $self->{meta}->{$descent}->{Callback}->{write}->{$_}++; } @$item_writers;        map { $self->{meta}->{$descent}->{Callback}->{write}->{$_}++; } @$item_writers;
109      }      }
110            
111      # Callbacks - readers (will be triggered _after_ reading from source)      # Callbacks - readers (will be triggered _after_ reading from source)
112      if (my $item_readers = $self->{args}->{$_ . '_callbacks_read'}) {      if (my $item_readers = $self->{options}->{$_}->{callbacks}->{read}) {
113        my $descent = $_;        my $descent = $_;
114        map { $self->{meta}->{$descent}->{Callback}->{read}->{$_}++; } @$item_readers;        map { $self->{meta}->{$descent}->{Callback}->{read}->{$_}++; } @$item_readers;
115      }      }
116            
117      # resolve storage objects      # resolve storage handles
118      $self->{meta}->{$_}->{storage} = $self->{options}->{$_}->{storage}->{handle};        $self->{meta}->{$_}->{storage} = $self->{options}->{$_}->{storage}->{handle};
119    
120        # transfer storage handle options to metadata
121          #map { $self->{meta}->{$_}->{isIdentAuthority} = 1 } @{$self->{id_authorities}};
122          #map { $self->{meta}->{$_}->{isChecksumAuthority} = 1; } @{$self->{checksum_authorities}};
123          #map { $self->{meta}->{$_}->{isWriteProtected} = 1; } @{$self->{write_protected}};
124          #print Dumper($self->{options}->{$_});
125          #exit;
126          $self->{meta}->{$_}->{isIdentAuthority} = $self->{options}->{$_}->{storage}->{handle}->{locator}->{sync}->{isIdentAuthority};
127          $self->{meta}->{$_}->{isWriteProtected} = $self->{options}->{$_}->{storage}->{handle}->{locator}->{sync}->{isWriteProtected};
128          $self->{meta}->{$_}->{isChecksumAuthority} = $self->{options}->{$_}->{storage}->{handle}->{locator}->{sync}->{isChecksumAuthority};
129    
130    }    }
131    
132    #print Dumper($self->{meta});    #print Dumper($self->{meta});
# Line 195  sub _buildMetadataV2 { Line 135  sub _buildMetadataV2 {
135  }  }
136    
137    
138  sub _buildFieldmappingV1 {  sub options2metadata_accessor {
139    my $self = shift;    my $self = shift;
140    
141    # 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;  
       }  
     }  
142    
143    }    # build accessor metadata (for each descent)
144      foreach my $descent ('source', 'target') {
145    
146    return 1;        # the database type plays a role here to handle special nodesets:
147          # there may be a) childless/non-strict nodesets (e.g. a CSV-file)
148          # or b) normal ones - here the node-name corresponds more or less directly to
149          # the physical location in the storage hierarchy below us (e.g. MAPI or LDAP)
150          # or c) sets of nodes which are physically mapped by node-type (e.g. a RDBMS or a ODBMS)
151          my $dbType = $self->{meta}->{$descent}->{storage}->{locator}->{type};
152          
153            # a, b and c are "accessor-type"s (of 'none', 'node-name', 'node-type')
154            # the following code resolves these types to '$accessorType'
155            # and properly sets '$accessorName'
156    
157            # don't continue for certain storage handlers
158              # HACK for DBD::CSV - re-enable for other DBDs
159              #next if $dbType eq 'DBI';
160      
161            # get nodename
162    
163              # get node-name
164                my $nodename = $self->{meta}->{$descent}->{node};   # V1
165                $nodename ||= $self->{meta}->{$descent}->{nodeName};    # V2
166    
167              # check if nodename is actually a CODEref, execute it to get a mapped/filtered target-nodename
168                #print "----", ref $nodename, "\n";
169                #if ($nodename =~ m/CODE/) {
170                #  print Dumper($self);
171                #  #exit;
172                #  $nodename = $nodename->($nodename);
173                #}
174    
175            # determine nodeset accessor -type and -name
176              # defaults
177              my $accessorType = 'none';
178              my $accessorName = '';
179              
180              # if explicit address was given in options, just use it!
181              if (my $address = $self->{options}->{$descent}->{address}) {
182                $accessorType = 'direct-address';
183                $accessorName = $address;
184              }
185              
186              # c)
187              elsif (($dbType eq 'DBI' || $dbType eq 'Tangram') && $self->{meta}->{$descent}->{nodeType}) {
188                $accessorType = 'node-type';
189                $accessorName = $self->{meta}->{$descent}->{nodeType};
190              }
191    
192              # b)
193              elsif ($nodename) {
194                $accessorType = 'node-name';
195                $accessorName = $nodename;
196              }
197    
198          # write accessor information to metadata
199          $self->{meta}->{$descent}->{accessorType} = $accessorType;
200          $self->{meta}->{$descent}->{accessorName} = $accessorName;
201        
202        }
203    
204      # trace
205        #print Dumper($self->{meta});
206        #print Dumper($self->{options});
207        #exit;
208    
209  }  }
210    
211    
212    
213    sub buildAttributeMap {
214    
215     my $self = shift;
216    
217      # field-structure for building sql
218      # mapping of sql-fieldnames to object-attributes
219        $self->{node}->{map} = {};
220    
221        # manually set ...
222          # ... object-id
223          $self->{node}->{map}->{$self->{meta}->{target}->{IdentProvider}->{arg}} = $self->{node}->{source}->{ident};
224          # ... checksum
225          $self->{node}->{map}->{cs} = $self->{node}->{source}->{checksum};
226    
227    #print "sqlmap: ", Dumper($self->{node}->{map}), "\n";
228    
229    #print Dumper($self);
230    #exit;
231    
232        # for transferring flat structures via simple (1:1) mapping
233        # TODO: diff per property / property value
234    
235        #if ($self->{args}->{mapping}) {
236          # apply mapping from $self->{args}->{mapping} to $self->{node}->{map}
237          #foreach my $key (@{$self->{meta}->{source}->{childnodes}}) {
238          my @childnodes = @{$self->{meta}->{source}->{childnodes}};
239          for (my $mapidx = 0; $mapidx <= $#childnodes; $mapidx++) {
240            #my $map_right = $self->{args}->{mapping}->{$key};
241            
242            $self->{node}->{source}->{propcache} = {};
243            $self->{node}->{target}->{propcache} = {};
244            
245            # get property name
246            $self->{node}->{source}->{propcache}->{property} = $self->{meta}->{source}->{childnodes}->[$mapidx];
247            $self->{node}->{target}->{propcache}->{property} = $self->{meta}->{target}->{childnodes}->[$mapidx];
248            #print "map: $map_right", "\n";
249    
250            # get property value
251            my $value;
252            
253            # detect for callback - old style - (maybe the better???)
254            if (ref($self->{node}->{target}->{map}) eq 'CODE') {
255              #$value = &$map_right($objClone);
256            } else {
257              # plain (scalar?) value
258              #$value = $objClone->{$map_right};
259              $self->{node}->{source}->{propcache}->{value} = $self->{node}->{source}->{payload}->{$self->{node}->{source}->{propcache}->{property}};
260            }
261            #$self->{node}->{map}->{$key} = $value;
262            
263            # detect expression
264            # for transferring deeply nested structures described by expressions
265            #print "val: $self->{node}->{source}->{propcache}->{value}", "\n";
266            if ($self->{node}->{source}->{propcache}->{property} =~ s/^expr://) {
267              
268              # create an anonymous sub to act as callback target dispatcher
269                my $cb_dispatcher = sub {
270                  #print "===============  CALLBACK DISPATCHER", "\n";
271                  #print "ident: ", $self->{node}->{source}->{ident}, "\n";
272                  #return $self->{node}->{source}->{ident};
273                  
274                };
275              
276    
277    #print Dumper($self->{node});
278              
279              # build callback map for helper function
280              #my $cbmap = { $self->{meta}->{source}->{IdentProvider}->{arg} => $cb_dispatcher };
281              my $cbmap = {};
282              my $value = ref_slot($self->{node}->{source}->{payload}, $self->{node}->{source}->{propcache}->{property}, $cbmap);
283              $self->{node}->{source}->{propcache}->{value} = $value;
284            }
285    
286            # encode values dependent on type of underlying storage here - expand cases...
287            my $storage_type = $self->{meta}->{target}->{storage}->{locator}->{type};
288            if ($storage_type eq 'DBI') {
289              # ...for sql
290              # quotemeta?
291              $self->{node}->{source}->{propcache}->{value} = quotesql($self->{node}->{source}->{propcache}->{value});
292    
293            } elsif ($storage_type eq 'Tangram') {
294              # iso? utf8 already possible?
295            
296            } elsif ($storage_type eq 'LDAP') {
297              # TODO: encode utf8 here?
298    
299            }
300    
301            # store value to transfer map
302            $self->{node}->{map}->{$self->{node}->{target}->{propcache}->{property}} = $self->{node}->{source}->{propcache}->{value};
303    
304          }
305        #}
306    
307        
308      # TODO: $logger->dump( ... );
309      #$logger->debug( "sqlmap:" . "\n" . Dumper($self->{node}->{map}) );
310    #print "sqlmap: ", Dumper($self->{node}->{map}), "\n";
311    #print "entrystatus: ", Dumper($self->{node}), "\n";
312    
313    }
314    
315  1;  1;
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