X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.db.common%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fcommon%2Frequest%2FPossibleTag.java;fp=bundles%2Forg.simantics.db.common%2Fsrc%2Forg%2Fsimantics%2Fdb%2Fcommon%2Frequest%2FPossibleTag.java;h=9265074c62d99233a46bc36ff0d70f09755447dd;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleTag.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleTag.java
new file mode 100644
index 000000000..9265074c6
--- /dev/null
+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleTag.java
@@ -0,0 +1,48 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.common.request;
+
+import org.simantics.db.AsyncReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.Statement;
+import org.simantics.db.procedure.AsyncProcedure;
+
+final public class PossibleTag extends ResourceAsyncRead2<Resource> {
+
+    public PossibleTag(Resource resource, Resource predicate) {
+        super(resource, predicate);
+    }
+
+    @Override
+    public void perform(AsyncReadGraph graph, final AsyncProcedure<Resource> procedure) {
+        
+        graph.forPossibleStatement(resource, resource2, new AsyncProcedure<Statement>() {
+
+			@Override
+			public void execute(AsyncReadGraph graph, Statement result) {
+			    if(result == null)
+			        procedure.execute(graph, null);
+			    else 
+                    procedure.execute(graph, result.getPredicate());
+			        
+			}
+
+			@Override
+			public void exception(AsyncReadGraph graph, Throwable t) {
+				procedure.exception(graph, t);
+			}
+        	
+        });
+        
+    }
+
+}