| 55 | | Code that currently calls MgSelectionBase::GenerateFilter() should be updated to use MgSelectionBase::GenerateFilters() instead, and the caller will be required to process all the filters in the collection to correctly query the complete selection set. In places where a relatively small number of features are expected in a selection (i.e. less than the value specified by SelectionFilterSize in serverconfig.ini/webconfig.ini), MgSelectionBase::GenerateFilter() can still be safely used to return correct results. |
| | 55 | Code that currently calls MgSelectionBase::GenerateFilter() should be updated to use MgSelectionBase::GenerateFilters() instead, and the caller will be required to process all the filters in the collection to correctly query the complete selection set. |
| | 56 | |
| | 57 | PHP code example using existing MgSelectionBase::GenerateFilter() API |
| | 58 | {{{ |
| | 59 | $filter = $sel->GenerateFilter($selLayer, $featureClassName); |
| | 60 | |
| | 61 | $query = new MgFeatureQueryOptions(); |
| | 62 | $query->SetFilter($filter); |
| | 63 | |
| | 64 | $featureSource = new MgResourceIdentifier($selLayer->GetFeatureSourceId()); |
| | 65 | $features = $featureSrvc->SelectFeatures($featureSource, $featureClassName, $query); |
| | 66 | if($features->ReadNext()) |
| | 67 | { |
| | 68 | do |
| | 69 | { |
| | 70 | AddFeatureToCollection($features->GetGeometry()); |
| | 71 | } |
| | 72 | while($features->ReadNext()); |
| | 73 | $features->Close(); |
| | 74 | } |
| | 75 | }}} |
| | 76 | |
| | 77 | PHP code example using NEW MgSelectionBase::GenerateFilters() API |
| | 78 | {{{ |
| | 79 | $filterCollection = $sel->GenerateFilters($selLayer, $featureClassName, GetMaxSelectionSize()); |
| | 80 | |
| | 81 | for ($filterIndex = 0; $filterIndex < $filterCollection->GetCount(), $filterIndex++) |
| | 82 | { |
| | 83 | $query = new MgFeatureQueryOptions(); |
| | 84 | $query->SetFilter($filterCollection->GetItem($filterIndex)); |
| | 85 | |
| | 86 | $featureSource = new MgResourceIdentifier($selLayer->GetFeatureSourceId()); |
| | 87 | $features = $featureSrvc->SelectFeatures($featureSource, $featureClassName, $query); |
| | 88 | if($features->ReadNext()) |
| | 89 | { |
| | 90 | do |
| | 91 | { |
| | 92 | AddFeatureToCollection($features->GetGeometry()); |
| | 93 | } |
| | 94 | while($features->ReadNext()); |
| | 95 | $features->Close(); |
| | 96 | } |
| | 97 | } |
| | 98 | }}} |
| | 99 | |
| | 100 | In places where a relatively small number of features are expected in a selection (i.e. less than the value specified by SelectionFilterSize in serverconfig.ini/webconfig.ini), MgSelectionBase::GenerateFilter() can still be safely used to return correct results. |
