Support for linked lists in objmap2.

[simantics/platform.git] / bundles / org.simantics.objmap2 / src / org / simantics / objmap / graph / annotations / factories / LinkedListRuleFactory.java

diff --git a/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/annotations/factories/LinkedListRuleFactory.java b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/annotations/factories/LinkedListRuleFactory.java
new file mode 100644 (file)
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+++ b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/annotations/factories/LinkedListRuleFactory.java
@@ -0,0 +1,41 @@
+/*******************************************************************************
+ * Copyright (c) 2019 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:
+ *     Semantum oy - initial API and implementation
+ *******************************************************************************/
+package org.simantics.objmap.graph.annotations.factories;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Field;
+import java.util.Collection;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.exception.ResourceNotFoundException;
+import org.simantics.db.exception.ServiceException;
+import org.simantics.db.exception.ValidationException;
+import org.simantics.objmap.bidirectional.IBidirectionalMappingRule;
+import org.simantics.objmap.graph.annotations.LinkedList;
+import org.simantics.objmap.graph.rules.MappedElementsRule;
+import org.simantics.objmap.graph.rules.domain.LinkedListAccessor;
+import org.simantics.objmap.graph.rules.factory.IFieldRuleFactory;
+import org.simantics.objmap.graph.rules.range.FieldAccessor;
+
+public class LinkedListRuleFactory<Range> implements IFieldRuleFactory<Resource, Range> {
+
+    @Override
+    public IBidirectionalMappingRule<Resource, Range> create(ReadGraph g, Annotation _annotation, Field field) throws ResourceNotFoundException, ValidationException, ServiceException {
+        LinkedList annotation = (LinkedList)_annotation;
+        return new MappedElementsRule<Resource,Range>(
+                new LinkedListAccessor(g.getResource(annotation.value()), g.getResource(annotation.type()), annotation.composition()),
+                new FieldAccessor<Range,Collection<Range>>(field)
+            );
+    }
+
+}