Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / adapter / impl / RelatedObjectRemover.java

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/adapter/impl/RelatedObjectRemover.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/adapter/impl/RelatedObjectRemover.java
new file mode 100644 (file)
index 0000000..a1d48cf
--- /dev/null
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/adapter/impl/RelatedObjectRemover.java
@@ -0,0 +1,76 @@
+/*******************************************************************************\r
+ * Copyright (c) 2012 Association for Decentralized Information Management in\r
+ * 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.db.layer0.adapter.impl;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.adapter.Remover;\r
+import org.simantics.db.layer0.util.RemoverUtil;\r
+\r
+/**\r
+ * A simple {@link Remover} implementation for removing a resource and its specified related objects using the {@link EntityRemover} logic.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class RelatedObjectRemover extends AbstractRemover {\r
+\r
+    Resource[] relations;\r
+\r
+    public RelatedObjectRemover(ReadGraph graph, Resource component, String relationURI) throws DatabaseException {\r
+        super(component);\r
+        relations = new Resource[] { graph.getResource(relationURI) };\r
+    }\r
+\r
+    public RelatedObjectRemover(ReadGraph graph, Resource component, String relationURI, String relationURI2) throws DatabaseException {\r
+        this(graph, component, new String[] { relationURI, relationURI2 });\r
+    }\r
+\r
+    public RelatedObjectRemover(ReadGraph graph, Resource component, String relationURI, String relationURI2, String relationURI3) throws DatabaseException {\r
+        this(graph, component, new String[] { relationURI, relationURI2, relationURI3 });\r
+    }\r
+\r
+    public RelatedObjectRemover(ReadGraph graph, Resource component, String... relationURIs) throws DatabaseException {\r
+        super(component);\r
+        if (relationURIs.length == 0) {\r
+            relations = Resource.NONE;\r
+        } else {\r
+            relations = new Resource[relationURIs.length];\r
+            for (int i = 0; i < relationURIs.length; ++i)\r
+                relations[i] = graph.getResource(relationURIs[i]);\r
+        }\r
+    }\r
+\r
+    @Override\r
+    public void remove(WriteGraph graph) throws DatabaseException {\r
+        Collection<Resource> objects = new ArrayList<Resource>();\r
+        for (Resource relation : relations) {\r
+            for (Resource object : graph.getObjects(resource, relation)) {\r
+                if (object.equals(resource))\r
+                    continue;\r
+                objects.add(object);\r
+            }\r
+        }\r
+\r
+        // Remove self first to prevent later actions for returning to it.\r
+        EntityRemover.remove(graph, resource);\r
+\r
+        // Finally, remove related matter.\r
+        for (Resource object : objects)\r
+            RemoverUtil.remove(graph, object);\r
+    }\r
+\r
+}\r