Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / service / impl / VirtualGraphInitializer.java

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/service/impl/VirtualGraphInitializer.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/service/impl/VirtualGraphInitializer.java
new file mode 100644 (file)
index 0000000..decdc8c
--- /dev/null
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/service/impl/VirtualGraphInitializer.java
@@ -0,0 +1,86 @@
+/*******************************************************************************\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.db.layer0.service.impl;\r
+\r
+import java.io.IOException;\r
+import java.io.InputStream;\r
+import java.net.URL;\r
+import java.util.Enumeration;\r
+import java.util.UUID;\r
+\r
+import org.eclipse.core.runtime.IStatus;\r
+import org.eclipse.core.runtime.MultiStatus;\r
+import org.eclipse.core.runtime.Status;\r
+import org.osgi.framework.Bundle;\r
+import org.osgi.framework.BundleContext;\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.databoard.Datatypes;\r
+import org.simantics.databoard.serialization.Serializer;\r
+import org.simantics.databoard.type.Datatype;\r
+import org.simantics.db.Session;\r
+import org.simantics.db.VirtualGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.internal.Activator;\r
+import org.simantics.db.service.VirtualGraphSupport;\r
+import org.simantics.db.services.ServiceInitializer;\r
+import org.simantics.graph.db.ImportAdvisor;\r
+import org.simantics.graph.db.TransferableGraphs;\r
+import org.simantics.graph.representation.TransferableGraph1;\r
+\r
+/**\r
+ * A database client service initializer which ensures that any <code>.tg</code>\r
+ * files defined in a bundle folder <code>virtualgraphs</code> are imported into\r
+ * randomly named in-memory virtualgraphs for the initialized session.\r
+ * \r
+ * @author Antti Villberg\r
+ */\r
+public class VirtualGraphInitializer implements ServiceInitializer {\r
+\r
+       @Override\r
+       public IStatus initialize(Session s) {\r
+               MultiStatus result = new MultiStatus(Activator.PLUGIN_ID, 0, "VirtualGraphInitialize errors:", null);\r
+               BundleContext context = Activator.getInstance().getContext();\r
+               Serializer datatypeSerializer = Bindings.getSerializerUnchecked( Datatype.class );\r
+               Datatype tgType = Datatypes.getDatatypeUnchecked(TransferableGraph1.class);\r
+               Serializer tgSerializer = Bindings.getSerializerUnchecked( TransferableGraph1.class );\r
+               for (final Bundle b : context.getBundles()) {\r
+                       Enumeration<?> graphs = b.getEntryPaths("virtualgraphs");\r
+                       while(graphs != null && graphs.hasMoreElements()) {\r
+                               String element = (String)graphs.nextElement();\r
+                               if(!element.endsWith(".tg"))\r
+                                       continue;\r
+                               URL url = b.getEntry(element);\r
+                               try {\r
+                                       InputStream stream = url.openStream();\r
+                                       Datatype dt = (Datatype) datatypeSerializer.deserialize( stream );\r
+                                       if(dt.equals(tgType)) {\r
+                                               VirtualGraphSupport support = s.getService(VirtualGraphSupport.class);\r
+                                               VirtualGraph vg = support.getMemoryPersistent(UUID.randomUUID().toString());\r
+                                               TransferableGraph1 tg = (TransferableGraph1) tgSerializer.deserialize(stream);\r
+                                               TransferableGraphs.importVirtualGraph(s, vg, tg, \r
+                                                               new ImportAdvisor());\r
+                                       }\r
+                                       stream.close();\r
+                               } catch (IOException e) {\r
+                                       IStatus status = new Status(IStatus.ERROR, context.getBundle().getSymbolicName(), "VirtualGraphInitializer transferable graph initialization failed for '" + url.toString() + "', see exception for details.", e);\r
+                                       result.add(status);\r
+                               } catch (DatabaseException e) {\r
+                                       IStatus status = new Status(IStatus.ERROR, context.getBundle().getSymbolicName(), "VirtualGraphInitializer transferable graph initialization failed for '" + url.toString() + "', see exception for details.", e);\r
+                                       result.add(status);\r
+                               }\r
+                       }\r
+               }\r
+               if (!result.isOK()) return result;\r
+               return Status.OK_STATUS;\r
+       }\r
+\r
+}\r