X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.event%2Fsrc%2Forg%2Fsimantics%2Fevent%2Futil%2FEventUtils.java;h=9f29cc7ab15da399c97a55c3485c0d0402b8b49f;hb=131be5c413e1f9dc652b6b46c763625b30ad8350;hp=bb85be21fe878143cb864547df0576043625efc3;hpb=969bd23cab98a79ca9101af33334000879fb60c5;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.event/src/org/simantics/event/util/EventUtils.java b/bundles/org.simantics.event/src/org/simantics/event/util/EventUtils.java
index bb85be21f..9f29cc7ab 100644
--- a/bundles/org.simantics.event/src/org/simantics/event/util/EventUtils.java
+++ b/bundles/org.simantics.event/src/org/simantics/event/util/EventUtils.java
@@ -1,29 +1,72 @@
-package org.simantics.event.util;
-
-import java.util.UUID;
-
-import org.simantics.databoard.Bindings;
-import org.simantics.db.Resource;
-import org.simantics.db.WriteGraph;
-import org.simantics.db.exception.DatabaseException;
-import org.simantics.event.ontology.EventResource;
-import org.simantics.layer0.Layer0;
-
-public class EventUtils {
-
-	public static final int MAX_EVENTS = 1000;
-	public static final int SLICE_SIZE = 64;
-	public static final int KEEPS_SLICES = (MAX_EVENTS / SLICE_SIZE) + 2;
-	public static final String MAX_SLICE_NAME = "" + (SLICE_SIZE-1);
-
-	public static Resource createLog(WriteGraph graph) throws DatabaseException {
-		Layer0 L0 = Layer0.getInstance(graph);
-		EventResource EVENT = EventResource.getInstance(graph);
-        Resource log = graph.newResource();
-        graph.claim(log, L0.InstanceOf, null, EVENT.EventLog);
-        graph.claimLiteral(log, L0.HasName, UUID.randomUUID().toString(), Bindings.STRING);
-        graph.claimLiteral(log, EVENT.HasModificationCounter, 0, Bindings.INTEGER);
-        return log;
-	}
-	
-}
+package org.simantics.event.util;
+
+import java.util.List;
+import java.util.UUID;
+
+import org.simantics.databoard.Bindings;
+import org.simantics.db.Resource;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.request.PossibleTypedParent;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.event.ontology.EventResource;
+import org.simantics.layer0.Layer0;
+
+public class EventUtils {
+
+	public static final int MAX_EVENTS = 1000;
+	public static final int SLICE_SIZE = 64;
+	public static final int KEEPS_SLICES = (MAX_EVENTS / SLICE_SIZE) + 2;
+	public static final String MAX_SLICE_NAME = "" + (SLICE_SIZE-1);
+
+	public static Resource createLog(WriteGraph graph) throws DatabaseException {
+		Layer0 L0 = Layer0.getInstance(graph);
+		EventResource EVENT = EventResource.getInstance(graph);
+        Resource log = graph.newResource();
+        graph.claim(log, L0.InstanceOf, null, EVENT.EventLog);
+        graph.claimLiteral(log, L0.HasName, UUID.randomUUID().toString(), Bindings.STRING);
+        graph.claimLiteral(log, EVENT.HasModificationCounter, 0, Bindings.INTEGER);
+        return log;
+	}
+
+    /**
+     * Bumps the modification counter value of the event log of the specified
+     * events using {@link #bumpModificationCounter(WriteGraph, Resource)}.
+     * <p>
+     * The code assumes that all events are from the same log.
+     * 
+     * @param graph
+     * @param forLogOfEvents
+     * @throws DatabaseException
+     */
+    public static void bumpModificationCounter(WriteGraph graph, List<Resource> forLogOfEvents) throws DatabaseException {
+        EventResource EVENT = EventResource.getInstance(graph);
+        for (Resource event : forLogOfEvents) {
+            Resource log = graph.syncRequest(new PossibleTypedParent(event, EVENT.EventLog));
+            if (log != null) {
+                bumpModificationCounter(graph, log);
+                return;
+            }
+        }
+    }
+
+    /**
+     * Bumps the modification counter of the specified event log by 1.
+     * 
+     * @param graph
+     * @param eventLog
+     * @return new modification counter value
+     * @throws DatabaseException
+     */
+    public static int bumpModificationCounter(WriteGraph graph, Resource eventLog) throws DatabaseException {
+        EventResource EVENT = EventResource.getInstance(graph);
+        Resource counter = graph.getPossibleObject(eventLog, EVENT.HasModificationCounter);
+        if (counter != null) {
+            Integer c = graph.getValue(counter, Bindings.INTEGER);
+            c = c == null ? 1 : c+1;
+            graph.claimValue(counter, c, Bindings.INTEGER);
+            return c;
+        }
+        return 0;
+    }
+
+}