From: Marko Luukkainen <marko.luukkainen@semantum.fi>
Date: Tue, 17 Dec 2019 15:52:55 +0000 (+0200)
Subject: Simple update operation
X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Finterop.git;a=commitdiff_plain;h=f46f7fca458ebc63f7a280b9088904710f6149f1

Simple update operation

Operation creates new objects by copyingL0.InstanceOf and L0.HasProperty
relations.

gitlab #20

Change-Id: I4a1bacd17a826c6cffea375dd311428e0a24ec89
---

diff --git a/org.simantics.interop.update/src/org/simantics/interop/update/model/SimpleObjectUpdateOp.java b/org.simantics.interop.update/src/org/simantics/interop/update/model/SimpleObjectUpdateOp.java
new file mode 100644
index 0000000..9f2f41a
--- /dev/null
+++ b/org.simantics.interop.update/src/org/simantics/interop/update/model/SimpleObjectUpdateOp.java
@@ -0,0 +1,82 @@
+package org.simantics.interop.update.model;
+
+import java.util.Collection;
+
+import org.simantics.db.Resource;
+import org.simantics.db.Statement;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.interop.test.GraphChanges;
+import org.simantics.layer0.Layer0;
+
+/**
+ * Simple update operation, where 
+ *   addition is based on copying L0.InstanceOf and L0.HasProperty relations.
+ *   deletion is deny.
+ * 
+ * @author luukkainen
+ *
+ */
+public class SimpleObjectUpdateOp extends AddDeleteUpdateOp {
+	
+	private Statement r;
+	protected Resource copyObj;
+	
+	public SimpleObjectUpdateOp(Statement r, boolean add, GraphChanges changes) {
+		super(changes);
+		this.r = r;
+		this.add = add;
+	}
+	
+	@Override
+	protected void _apply(WriteGraph g) throws DatabaseException {
+		if (add) {
+			Resource parent = null;
+			if (getChanges().getComparable().containsRight(r.getSubject()))
+				parent = getChanges().getComparable().getLeft(r.getSubject());
+			else {
+				Collection<UpdateOp> parentOps = getParentOps();
+				if (parentOps.size() != 1)
+					throw new RuntimeException("Parent not found.");
+				parent = parentOps.iterator().next().getCreatedResource();
+			}
+			if (parent == null)
+				throw new RuntimeException("Parent not found.");
+			
+			Layer0 L0 = Layer0.getInstance(g);
+			
+			Resource sourceObj = r.getObject();
+			
+			copyObj = g.newResource();
+			for (Resource t : g.getObjects(sourceObj, L0.InstanceOf)) {
+				g.claim(copyObj, L0.InstanceOf, t);
+			}
+			copyProperties(g, sourceObj, copyObj);
+			g.claim(parent, r.getPredicate(), copyObj);
+				
+		} else {
+			
+			Resource sourceObj= r.getObject();
+			g.deny(sourceObj);
+			
+		}
+
+	}
+	
+	@Override
+	public Statement getStatement() {
+		return r;
+	}
+	
+	@Override
+	public Resource getResource() {
+		return r.getObject();
+	}
+	
+	@Override
+	public Resource getCreatedResource() {
+		return copyObj;
+	}
+	
+
+}