--- /dev/null
+/*******************************************************************************\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.layer0.utils.predicates;\r
+\r
+import java.util.Collection;\r
+\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+\r
+public interface IUnaryPredicate {\r
+\r
+ boolean supportsUnboundedQuery();\r
+ \r
+ Collection<Resource> getResources(ReadGraph g) throws DatabaseException;\r
+ boolean has(ReadGraph g, Resource resource) throws DatabaseException;\r
+\r
+ boolean supportsAddition();\r
+ boolean supportsRemoval();\r
+ \r
+ void add(WriteGraph g, Resource r) throws DatabaseException;\r
+ void remove(WriteGraph g, Resource r) throws DatabaseException;\r
+ \r
+}\r