X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.modeling%2Fsrc%2Forg%2Fsimantics%2Fmodeling%2Futils%2FBatchValidations.java;h=0ce852403f3b888fa1a94a7fd2aca20f33c7e439;hp=91d85aed2593b00097f75f29a5dc0cc6240bf484;hb=d837e1dc077a32288fccea32a55b4e81717e75a9;hpb=6c99e980d250fb9201aba93be7dcb1f55564dccd

diff --git a/bundles/org.simantics.modeling/src/org/simantics/modeling/utils/BatchValidations.java b/bundles/org.simantics.modeling/src/org/simantics/modeling/utils/BatchValidations.java
index 91d85aed2..0ce852403 100644
--- a/bundles/org.simantics.modeling/src/org/simantics/modeling/utils/BatchValidations.java
+++ b/bundles/org.simantics.modeling/src/org/simantics/modeling/utils/BatchValidations.java
@@ -14,8 +14,10 @@ import org.eclipse.core.runtime.Status;
 import org.eclipse.core.runtime.SubMonitor;
 import org.simantics.Simantics;
 import org.simantics.db.Issue;
+import org.simantics.db.ReadGraph;
 import org.simantics.db.Resource;
 import org.simantics.db.Session;
+import org.simantics.db.Statement;
 import org.simantics.db.VirtualGraph;
 import org.simantics.db.WriteGraph;
 import org.simantics.db.common.request.WriteRequest;
@@ -213,4 +215,39 @@ public class BatchValidations {
 		return result;
 	}
 
+	/**
+	 * Checks if the specified <code>resourceToCheckForLinks</code> is linked to
+	 * anything else besides itself and <code>excludeLinksTo</code>.
+	 * 
+	 * <p>
+	 * This is used to if an issue context is still valid. We consider any issue
+	 * context that is not attached to something else besides its issue context to
+	 * be an invalid issue. Assertions and L0.InstanceOf do not count as external
+	 * links.
+	 * 
+	 * @param graph database access handle
+	 * @param resourceToCheckForLinks the resource to check for "external" links
+	 * @param excludeLinksTo exclude links to this resource from evaluation
+	 * @return <code>true</code> if there are links, <code>false</code> otherwise
+	 * @throws DatabaseException 
+	 */
+	public static boolean isLinkedToOtherThan(ReadGraph graph, Resource resourceToCheckForLinks,
+			Resource excludeLinksTo)
+					throws DatabaseException
+	{
+		Layer0 L0 = Layer0.getInstance(graph);
+		for (Statement stm : graph.getStatements(resourceToCheckForLinks, L0.IsWeaklyRelatedTo)) {
+			if (stm.isAsserted(resourceToCheckForLinks))
+				continue;
+			if (stm.getPredicate().equals(L0.InstanceOf))
+				continue;
+			Resource o = stm.getObject();
+			if (o.equals(excludeLinksTo) || o.equals(resourceToCheckForLinks))
+				continue;
+
+			return true;
+		}
+		return false;
+	}
+
 }