Add support for dependency changes in SCL

[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / util / Layer0Utils.java

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java
index 198ee41b77e060ad4cdf205e46a10038cbaa494b..6b9b2fc6502845763871aa1383d8d8a1835ef33b 100644 (file)
--- a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java
@@ -54,6 +54,7 @@ import org.simantics.databoard.type.StringType;
 import org.simantics.databoard.type.UnionType;
 import org.simantics.databoard.type.VariantType;
 import org.simantics.databoard.util.ObjectUtils;
+import org.simantics.datatypes.literal.GUID;
 import org.simantics.db.ChangeSetIdentifier;
 import org.simantics.db.Operation;
 import org.simantics.db.ReadGraph;
@@ -73,6 +74,7 @@ import org.simantics.db.common.request.ObjectsWithType;
 import org.simantics.db.common.request.PossibleChild;
 import org.simantics.db.common.request.PossibleIndexRoot;
 import org.simantics.db.common.utils.NameUtils;
+import org.simantics.db.event.ChangeListener;
 import org.simantics.db.exception.CancelTransactionException;
 import org.simantics.db.exception.DatabaseException;
 import org.simantics.db.exception.ServiceException;
@@ -98,6 +100,7 @@ import org.simantics.db.service.ClusterControl;
 import org.simantics.db.service.ClusteringSupport;
 import org.simantics.db.service.CollectionSupport;
 import org.simantics.db.service.DebugSupport;
+import org.simantics.db.service.GraphChangeListenerSupport;
 import org.simantics.db.service.ManagementSupport;
 import org.simantics.db.service.UndoRedoSupport;
 import org.simantics.db.service.XSupport;
@@ -569,16 +572,16 @@ public class Layer0Utils {
 
        }
 
-       public static void claimAdaptedValue(WriteGraph graph, Resource objectResource, Object value, Binding binding, Datatype datatype) throws DatabaseException {
+       public static void claimAdaptedValue(WriteGraph graph, Resource objectResource, Object value, Binding binding, Datatype targetDatatype) throws DatabaseException {
 
                try {
 
-                       Datatype source = binding.type();
-                       if(source.equals(datatype)) {
+                       Datatype sourceDatatype = binding.type();
+                       if(sourceDatatype.equals(targetDatatype)) {
                                graph.claimValue(objectResource, value, binding);
                        } else {
-                               Binding target = Bindings.getBinding(datatype);
-                               Adapter adapter = Bindings.getAdapter(binding, target);
+                               Binding target = Bindings.getBinding(targetDatatype);
+                               Adapter adapter = Bindings.getTypeAdapter(binding, target);
                                graph.claimValue(objectResource, adapter.adapt(value), target);
                        }
 
@@ -1340,6 +1343,11 @@ public class Layer0Utils {
        }
        return result;
     }
+
+    public static Resource getPossiblePredicateByNameFromType(ReadGraph graph, Resource type, String name) throws DatabaseException {
+       Map<String,Resource> domain = getDomainOf(graph, type);
+       return domain.get(name); 
+    }
     
     public static Resource getPossiblePredicateByName(ReadGraph graph, Resource instance, String predicateName) throws DatabaseException {
        for(Resource type : graph.getPrincipalTypes(instance)) {
@@ -1387,4 +1395,55 @@ public class Layer0Utils {
         return PrettyPrintTG.print(tg, ignoreIdentifiers);
     }
 
+    /**
+     * Adds a random {@link GUID} as a value for <code>L0.identifier</code>
+     * 
+     * @param graph
+     * @param component
+     *            for which the identifier is added
+     * @param add
+     *            <code>true</code> to invoke addLiteral, <code>false</code> to
+     *            invoke claimLiteral
+     * @throws DatabaseException
+     */
+    public static void claimNewIdentifier(WriteGraph graph, Resource component, boolean add) throws DatabaseException {
+        Layer0 L0 = Layer0.getInstance(graph);
+        GUID guid = GUID.random();
+        if (add)
+            graph.addLiteral(component, L0.identifier, L0.identifier_Inverse, L0.GUID, guid, GUID.BINDING);
+        else
+            graph.claimLiteral(component, L0.identifier, L0.identifier_Inverse, L0.GUID, guid, GUID.BINDING);
+    }
+
+    /**
+     * Sets a new random unique identifier for the specified entity if it already
+     * has an identifier. If the entity does not have a previous identifier, nothing
+     * is done.
+     * 
+     * @param graph
+     * @param entity
+     *            for which the identifier is added
+     * @return <code>true</code> if the identifier was renewed, <code>false</code>
+     *         otherwise
+     * @throws DatabaseException
+     * @see {@link #claimNewIdentifier(WriteGraph, Resource, boolean)}
+     */
+    public static boolean renewIdentifier(WriteGraph graph, Resource entity) throws DatabaseException {
+        Layer0 L0 = Layer0.getInstance(graph);
+        Statement stm = graph.getPossibleStatement(entity, L0.identifier);
+        if (stm != null) {
+            graph.claimValue(stm.getObject(), GUID.random(), GUID.BINDING);
+            return true;
+        }
+        return false;
+    }
+
+    public static void addMetadataListener(ChangeListener listener) {
+        SimanticsInternal.getSession().getService(GraphChangeListenerSupport.class).addMetadataListener(listener);
+    }
+
+    public static void removeMetadataListener(ChangeListener listener) {
+        SimanticsInternal.getSession().getService(GraphChangeListenerSupport.class).removeMetadataListener(listener);
+    }
+
 }