Support for linked lists in objmap2.

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

diff --git a/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/annotations/LinkedListGet.java b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/annotations/LinkedListGet.java
new file mode 100644 (file)
index 0000000..a474499
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+++ b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/annotations/LinkedListGet.java
@@ -0,0 +1,35 @@
+/*******************************************************************************
+ * 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;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.simantics.layer0.Layer0;
+import org.simantics.objmap.graph.annotations.meta.IsCollectionRule;
+
+/**
+ * A get method that returns the contents of a linked list mapped to the single object of
+ * a given relation.
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+@IsCollectionRule
+@HasCollectionAdder(LinkedListAdd.class)
+@HasCollectionRemover(LinkedListRem.class)
+public @interface LinkedListGet {
+       String value();
+       String type() default Layer0.URIs.List;
+       boolean composition() default false;
+}