Migrated source code from Simantics SVN

[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
new file mode 100644 (file)
index 0000000..e17d8d9
--- /dev/null
+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleStatementWithNamedPredicate.java
@@ -0,0 +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