Fixed multiple issues causing dangling references to discarded queries

[simantics/platform.git] / bundles / org.simantics.db.common / src / org / simantics / db / common / request / PossibleStatementWithNamedPredicate.java

diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleStatementWithNamedPredicate.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleStatementWithNamedPredicate.java
index e17d8d9632f5722629f76876bfc4c3bea5b661d0..f1bb9f291a7f33381c8440932afd6dd1e11237dd 100644 (file)
--- a/bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleStatementWithNamedPredicate.java
+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleStatementWithNamedPredicate.java
@@ -1,42 +1,42 @@
-/*******************************************************************************\r
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
- * in Industry THTH ry.\r
- * All rights reserved. This program and the accompanying materials\r
- * are made available under the terms of the Eclipse Public License v1.0\r
- * which accompanies this distribution, and is available at\r
- * http://www.eclipse.org/legal/epl-v10.html\r
- *\r
- * Contributors:\r
- *     VTT Technical Research Centre of Finland - initial API and implementation\r
- *******************************************************************************/\r
-package org.simantics.db.common.request;\r
-\r
-import org.simantics.db.ReadGraph;\r
-import org.simantics.db.Resource;\r
-import org.simantics.db.Statement;\r
-import org.simantics.db.exception.DatabaseException;\r
-import org.simantics.layer0.Layer0;\r
-\r
-final public class PossibleStatementWithNamedPredicate extends TernaryRead<Resource, Resource, String, Statement> {\r
-\r
-    public PossibleStatementWithNamedPredicate(Resource resource, Resource predicate, String name) {\r
-        super(resource, predicate, name);\r
-    }\r
-\r
-    @Override\r
-    public Statement perform(ReadGraph graph) throws DatabaseException {\r
-       Layer0 b = Layer0.getInstance(graph);\r
-        Statement result = null;\r
-        for(Resource predicate : graph.getPredicates(parameter)) {\r
-               if(graph.isSubrelationOf(predicate, parameter2)) {\r
-               String name = graph.getPossibleRelatedValue(predicate, b.HasName);\r
-                if(parameter3.equals(name)) {\r
-                    if(result != null) return null;\r
-                    result = graph.getPossibleStatement(parameter, predicate);\r
-                }\r
-               }\r
-        }\r
-        return result;\r
-    }\r
-\r
-}\r
+/*******************************************************************************
+ * 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.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.Statement;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.layer0.Layer0;
+
+final public class PossibleStatementWithNamedPredicate extends TernaryRead<Resource, Resource, String, Statement> {
+
+    public PossibleStatementWithNamedPredicate(Resource resource, Resource predicate, String name) {
+        super(resource, predicate, name);
+    }
+
+    @Override
+    public Statement perform(ReadGraph graph) throws DatabaseException {
+       Layer0 b = Layer0.getInstance(graph);
+        Statement result = null;
+        for(Resource predicate : graph.getPredicates(parameter)) {
+               if(graph.isSubrelationOf(predicate, parameter2)) {
+               String name = graph.getPossibleRelatedValue(predicate, b.HasName);
+                if(parameter3.equals(name)) {
+                    if(result != null) return null;
+                    result = graph.getPossibleStatement(parameter, predicate);
+                }
+               }
+        }
+        return result;
+    }
+
+}