Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.diagram / src / org / simantics / diagram / symbolcontribution / SymbolProviderFactories.java

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/symbolcontribution/SymbolProviderFactories.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/symbolcontribution/SymbolProviderFactories.java
new file mode 100644 (file)
index 0000000..4320b20
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/symbolcontribution/SymbolProviderFactories.java
@@ -0,0 +1,44 @@
+package org.simantics.diagram.symbolcontribution;\r
+\r
+import org.eclipse.core.runtime.IStatus;\r
+import org.eclipse.core.runtime.Status;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.common.primitiverequest.PossibleAdapter;\r
+import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.diagram.internal.Activator;\r
+import org.simantics.diagram.stubs.DiagramResource;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class SymbolProviderFactories {\r
+\r
+    public static boolean accept(ReadGraph graph, DiagramResource DIA, Resource contribution, Resource diagram) throws DatabaseException {\r
+        String name = graph.getPossibleAdapter(contribution, String.class);\r
+        if (name == null)\r
+            return false;\r
+        \r
+        for (Resource filterR : graph.getObjects(contribution, DIA.HasSymbolContributionFilter)) {\r
+            try {\r
+                SymbolContributionFilter filter = graph.syncRequest(\r
+                        new PossibleAdapter<SymbolContributionFilter>(filterR, SymbolContributionFilter.class),\r
+                        TransientCacheAsyncListener.<SymbolContributionFilter> instance());\r
+                if (filter == null || !filter.accept(graph, contribution, filterR, diagram)) {\r
+                       return false;\r
+                }\r
+            } catch (DatabaseException e) {\r
+                // If any errors happen when requesting for the filter, we can\r
+                // only assume that the graph related to their definitions is\r
+                // somehow corrupted. In this case we must assume that the filter\r
+                // did not pass since it did not work properly and true checking\r
+                // could not be performed to completion.\r
+                Activator.getDefault().getLog().log(new Status(IStatus.ERROR, Activator.PLUGIN_ID, "Filter " + filterR + " testing failed", e));\r
+                return false;\r
+            }\r
+        }\r
+        return true;\r
+    }\r
+\r
+}\r