Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.layer0.utils / src / org / simantics / layer0 / utils / collections / ConditionalList.java

diff --git a/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/collections/ConditionalList.java b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/collections/ConditionalList.java
new file mode 100644 (file)
index 0000000..2791f9b
--- /dev/null
+++ b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/collections/ConditionalList.java
@@ -0,0 +1,46 @@
+/*******************************************************************************\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.collections;\r
+\r
+import java.util.Collection;\r
+\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.layer0.utils.operations.IOperation;\r
+import org.simantics.layer0.utils.predicates.IUnaryPredicate;\r
+import org.simantics.utils.datastructures.persistent.IContextMap;\r
+\r
+public class ConditionalList implements IContextualList {\r
+\r
+       IUnaryPredicate predicate;\r
+       Resource thenElement;\r
+       Resource elseElement;\r
+\r
+       public ConditionalList(IUnaryPredicate predicate, Resource thenElement,\r
+                       Resource elseElement) {\r
+               this.predicate = predicate;\r
+               this.thenElement = thenElement;\r
+               this.elseElement = elseElement;\r
+       }\r
+\r
+       @Override\r
+       public void fill(ReadGraph g, IContextMap parameters, Collection<Resource> c) throws DatabaseException {\r
+               Resource r = (Resource)parameters.get(IOperation.SUBJECT);\r
+               \r
+               if(predicate.has(g, r))\r
+                       ContextualListUtils.fill(g, thenElement, parameters, c);\r
+               else if(elseElement != null)\r
+                       ContextualListUtils.fill(g, elseElement, parameters, c);\r
+       }\r
+\r
+}\r