]> gerrit.simantics Code Review - simantics/platform.git/blobdiff - bundles/org.simantics.graph.db/src/org/simantics/graph/db/TransferableGraphs.java
Migrated source code from Simantics SVN
[simantics/platform.git] / bundles / org.simantics.graph.db / src / org / simantics / graph / db / TransferableGraphs.java
diff --git a/bundles/org.simantics.graph.db/src/org/simantics/graph/db/TransferableGraphs.java b/bundles/org.simantics.graph.db/src/org/simantics/graph/db/TransferableGraphs.java
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+/*******************************************************************************\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.graph.db;\r
+\r
+import java.io.BufferedOutputStream;\r
+import java.io.DataInput;\r
+import java.io.DataOutput;\r
+import java.io.DataOutputStream;\r
+import java.io.File;\r
+import java.io.FileOutputStream;\r
+import java.io.IOException;\r
+import java.io.InputStream;\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+import java.util.HashSet;\r
+import java.util.TreeMap;\r
+import java.util.UUID;\r
+\r
+import org.simantics.databoard.Accessors;\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.databoard.Datatypes;\r
+import org.simantics.databoard.accessor.error.AccessorConstructionException;\r
+import org.simantics.databoard.accessor.error.AccessorException;\r
+import org.simantics.databoard.accessor.file.FileVariantAccessor;\r
+import org.simantics.databoard.binding.Binding;\r
+import org.simantics.databoard.binding.error.BindingConstructionException;\r
+import org.simantics.databoard.binding.error.DatatypeConstructionException;\r
+import org.simantics.databoard.binding.mutable.Variant;\r
+import org.simantics.databoard.container.DataContainer;\r
+import org.simantics.databoard.container.DataContainers;\r
+import org.simantics.databoard.serialization.SerializationException;\r
+import org.simantics.databoard.serialization.Serializer;\r
+import org.simantics.databoard.type.Datatype;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.RequestProcessor;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.Session;\r
+import org.simantics.db.VirtualGraph;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.WriteOnlyGraph;\r
+import org.simantics.db.common.CommentMetadata;\r
+import org.simantics.db.common.request.ReadRequest;\r
+import org.simantics.db.common.request.WriteOnlyRequest;\r
+import org.simantics.db.common.request.WriteRequest;\r
+import org.simantics.db.exception.CancelTransactionException;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.service.SerialisationSupport;\r
+import org.simantics.db.service.VirtualGraphSupport;\r
+import org.simantics.graph.db.TransferableGraphSource.TransferableGraphSourceValueProcedure;\r
+import org.simantics.graph.diff.TransferableGraphDelta1;\r
+import org.simantics.graph.representation.Extensions;\r
+import org.simantics.graph.representation.External;\r
+import org.simantics.graph.representation.Identity;\r
+import org.simantics.graph.representation.TransferableGraph1;\r
+import org.simantics.graph.representation.Value;\r
+import org.simantics.utils.datastructures.BinaryFunction;\r
+\r
+import gnu.trove.list.array.TIntArrayList;\r
+import gnu.trove.map.hash.TObjectIntHashMap;\r
+\r
+public class TransferableGraphs {\r
+\r
+       public static long[] importGraph(Session session, Object tg, IImportAdvisor advisor) throws DatabaseException, TransferableGraphException {\r
+               if (tg instanceof TransferableGraph1) \r
+               {\r
+                       return importGraph1(session, (TransferableGraph1) tg, advisor);\r
+               }\r
+               throw new TransferableGraphException("Cannot import "+tg.getClass().getName());\r
+       }\r
+\r
+       public static long[] importGraph(WriteGraph g, Object tg, IImportAdvisor advisor) throws DatabaseException, TransferableGraphException {\r
+               if (tg instanceof TransferableGraph1) \r
+               {\r
+                       return importGraph1(g, (TransferableGraph1) tg, advisor);\r
+               }\r
+               throw new TransferableGraphException("Cannot import "+tg.getClass().getName());\r
+       }\r
+       \r
+       public static long[] importGraph(Session session, Object tg) throws DatabaseException, TransferableGraphException {\r
+               if (tg instanceof TransferableGraph1) \r
+               {\r
+                       return importGraph1(session, (TransferableGraph1) tg);\r
+               }\r
+               throw new TransferableGraphException("Cannot import "+tg.getClass().getName());\r
+       }\r
+\r
+       public static long[] importGraph(WriteGraph g, Object tg) throws DatabaseException, TransferableGraphException {\r
+               if (tg instanceof TransferableGraph1) \r
+               {\r
+                       return importGraph1(g, (TransferableGraph1) tg);\r
+               }\r
+               throw new TransferableGraphException("Cannot import "+tg.getClass().getName());\r
+       }\r
+       \r
+       public static Collection<Resource> collectExternals(RequestProcessor processor, final TransferableGraph1 tg) throws DatabaseException, TransferableGraphException {\r
+               final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg, new ImportAdvisor());\r
+               processor.syncRequest(new ReadRequest() {\r
+                       @Override\r
+                       public void run(ReadGraph graph) throws DatabaseException {\r
+                               process.prepare(graph);\r
+                       }\r
+               });\r
+               HashSet<Resource> result = new HashSet<Resource>();\r
+               for(Identity id : tg.identities) {\r
+                       if(id.definition instanceof External) {\r
+                               result.add(process.resources[id.resource]);\r
+                       }\r
+               }\r
+               return result;\r
+       }\r
+       \r
+       /**\r
+        * Imports transferable graph version 1 to the database. Root advisor is used\r
+        * to give identities to roots of the transferable graphs. It may be null,\r
+        * in which case new resources are created for all roots but the root library.\r
+        * \r
+        * @param session\r
+        * @param tg\r
+     * @param advisor root advisor or <code>null</code>\r
+        * @throws DatabaseException\r
+        */\r
+       public static long[] importGraph1(Session session, final TransferableGraph1 tg, final IImportAdvisor advisor_) throws DatabaseException, TransferableGraphException {\r
+               \r
+               final IImportAdvisor2 advisor = (advisor_ instanceof IImportAdvisor2) ? ((IImportAdvisor2)advisor_) : new WrapperAdvisor(advisor_);\r
+               \r
+               final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg, \r
+                               advisor == null ? new ImportAdvisor() : advisor);\r
+               session.syncRequest(new ReadRequest() {\r
+                       @Override\r
+                       public void run(ReadGraph graph) throws DatabaseException {\r
+                               process.prepare(graph);\r
+                       }\r
+               });             \r
+               session.syncRequest(new WriteOnlyRequest() {\r
+                       @Override\r
+                       public void perform(WriteOnlyGraph graph) throws DatabaseException {\r
+                               advisor.beforeWrite(graph, process);\r
+                               process.write(graph);\r
+                               advisor.afterWrite(graph, process);\r
+                       }\r
+               });\r
+               return process.getResourceIds(\r
+                               session.getService(SerialisationSupport.class));\r
+       }\r
+\r
+       public static void importGraph1(Session session, final TransferableGraph1 tg, IImportAdvisor advisor, final BinaryFunction<Boolean, WriteOnlyGraph, TransferableGraphImportProcess> callback) throws DatabaseException, TransferableGraphException {\r
+               final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg, \r
+                               advisor == null ? new ImportAdvisor() : advisor);\r
+               session.syncRequest(new ReadRequest() {\r
+                       @Override\r
+                       public void run(ReadGraph graph) throws DatabaseException {\r
+                               process.prepare(graph);\r
+                       }\r
+               });\r
+               session.syncRequest(new WriteOnlyRequest() {\r
+                       @Override\r
+                       public void perform(WriteOnlyGraph graph) throws DatabaseException {\r
+                               process.write(graph);\r
+                               if(callback != null)\r
+                                       callback.call(graph, process);\r
+                       }\r
+               });\r
+       }\r
+\r
+    public static void importGraph1(Session session, final TransferableGraphSource tg, IImportAdvisor advisor) throws Exception {\r
+        importGraph1(session, tg, advisor, null);\r
+    }\r
+\r
+    public static void importGraph1(Session session, final TransferableGraphSource tg, IImportAdvisor advisor, TGStatusMonitor monitor) throws DatabaseException {\r
+        importGraph1(session, null, tg, advisor, monitor);\r
+    }\r
+\r
+    public static void importGraph1(Session session, VirtualGraph vg, final TransferableGraphSource tg, IImportAdvisor advisor_, TGStatusMonitor monitor) throws DatabaseException {\r
+        \r
+        final IImportAdvisor2 advisor = (advisor_ instanceof IImportAdvisor2) ? ((IImportAdvisor2)advisor_) : new WrapperAdvisor(advisor_);\r
+\r
+               final StreamingTransferableGraphImportProcess process = new StreamingTransferableGraphImportProcess(session, vg, tg, advisor);\r
+               session.syncRequest(new ReadRequest() {\r
+                       @Override\r
+                       public void run(ReadGraph graph) throws DatabaseException {\r
+                               try {\r
+                                       process.prepare(graph);\r
+                               } catch (DatabaseException e) {\r
+                                       throw e;\r
+                               } catch (Exception e) {\r
+                                       throw new DatabaseException(e);\r
+                               }\r
+                       }\r
+               });\r
+               session.syncRequest(new WriteOnlyRequest(vg) {\r
+                       @Override\r
+                       public void perform(WriteOnlyGraph graph) throws DatabaseException {\r
+                               try {\r
+                                   advisor.beforeWrite(graph, process);\r
+                                       process.write(graph);\r
+                    advisor.afterWrite(graph, process);\r
+                               } catch (Exception e) {\r
+                                       throw new DatabaseException(e);\r
+                               }\r
+                       }\r
+               });\r
+       }\r
+\r
+       public static void importGraph1WithMonitor(Session session, final TransferableGraph1 tg, IImportAdvisor advisor_, TGStatusMonitor monitor) throws DatabaseException {\r
+               final IImportAdvisor2 advisor = (advisor_ instanceof IImportAdvisor2) ? ((IImportAdvisor2)advisor_) : new WrapperAdvisor(advisor_);\r
+               final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg, \r
+                               advisor == null ? new ImportAdvisor() : advisor, monitor);\r
+               session.syncRequest(new ReadRequest() {\r
+                       @Override\r
+                       public void run(ReadGraph graph) throws DatabaseException {\r
+                               process.prepare(graph);\r
+                       }\r
+               });\r
+               session.syncRequest(new WriteOnlyRequest() {\r
+                       @Override\r
+                       public void perform(WriteOnlyGraph graph) throws DatabaseException {\r
+                               advisor.beforeWrite(graph, process);\r
+                               process.write2(graph);\r
+                               advisor.afterWrite(graph, process);\r
+                               CommentMetadata comments = graph.getMetadata(CommentMetadata.class);\r
+                               comments.add("Imported transferable graph with " + tg.resourceCount + " resources");\r
+                               graph.addMetadata(comments);\r
+                       }\r
+               });\r
+       }\r
+\r
+       public static void importGraph1WithChanges(Session session, final TransferableGraph1 tg, IImportAdvisor advisor, final BinaryFunction<Boolean, WriteGraph, TransferableGraphImportProcess> callback) throws DatabaseException, TransferableGraphException {\r
+               final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg, \r
+                               advisor == null ? new ImportAdvisor() : advisor);\r
+               session.syncRequest(new ReadRequest() {\r
+                       @Override\r
+                       public void run(ReadGraph graph) throws DatabaseException {\r
+                               process.prepare(graph);\r
+                       }\r
+               });\r
+               session.syncRequest(new WriteRequest() {\r
+                       @Override\r
+                       public void perform(WriteGraph graph) throws DatabaseException {\r
+                               process.write2(graph);\r
+                CommentMetadata comments = graph.getMetadata(CommentMetadata.class);\r
+                comments.add("Imported transferable graph with " + tg.resourceCount + " resources");\r
+                graph.addMetadata(comments);\r
+                               if(callback != null)\r
+                                       callback.call(graph, process);\r
+                       }\r
+               });\r
+       }\r
+       \r
+       public static long[] importGraph1(Session session, final TransferableGraph1 tg) throws DatabaseException, TransferableGraphException {\r
+               final TransferableGraphImportProcess process = \r
+                       new TransferableGraphImportProcess(tg, \r
+                               null);\r
+               session.syncRequest(new ReadRequest() {\r
+                       @Override\r
+                       public void run(ReadGraph graph) throws DatabaseException {\r
+                               process.prepare(graph);\r
+                       }\r
+               });             \r
+               session.syncRequest(new WriteOnlyRequest() {\r
+                       @Override\r
+                       public void perform(WriteOnlyGraph graph) throws DatabaseException {\r
+                               process.write(graph);\r
+                       }\r
+               });\r
+               return process.getResourceIds(\r
+                               session.getService(SerialisationSupport.class));\r
+       }\r
+       \r
+       public static long[] importGraph1(WriteGraph graph, final TransferableGraph1 tg) throws DatabaseException, TransferableGraphException {\r
+               final TransferableGraphImportProcess process = \r
+                       new TransferableGraphImportProcess(tg, \r
+                               null);\r
+               process.prepare(graph);\r
+               process.write2(graph);\r
+               return process.getResourceIds(\r
+                               graph.getSession().getService(SerialisationSupport.class));\r
+       }\r
+       \r
+       /**\r
+        * Import transferable graph version 1 to the database. Root advisor is used\r
+        * to give identities to roots of the transferable graphs. It may be null,\r
+        * in which case new resources are created for all roots but the root library.\r
+        * \r
+        * @param session\r
+        * @param tg\r
+     * @param advisor root advisor or <code>null</code>\r
+        * @throws DatabaseException\r
+        */\r
+       public static long[] importGraph1(WriteGraph graph, TransferableGraph1 tg, IImportAdvisor advisor) throws DatabaseException {\r
+           return importGraph1(graph, tg, advisor, null);\r
+       }\r
+\r
+       public static long[] importGraph1(WriteGraph graph, TransferableGraph1 tg, IImportAdvisor advisor, TGStatusMonitor monitor) throws DatabaseException {\r
+               TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg, \r
+                               advisor == null ? new ImportAdvisor() : advisor, monitor);\r
+               process.prepare(graph);\r
+               if(advisor instanceof IImportAdvisor2) ((IImportAdvisor2)advisor).beforeWrite(graph, process);\r
+               process.write2(graph);\r
+               if(advisor instanceof IImportAdvisor2) ((IImportAdvisor2)advisor).afterWrite(graph, process);\r
+               return process.getResourceIds(\r
+                               graph.getSession().getService(SerialisationSupport.class));\r
+       }\r
+\r
+       public static long[] applyDelta(WriteGraph graph, long[] oldResources, TransferableGraphDelta1 delta) throws DatabaseException {\r
+               SerialisationSupport serializer = \r
+                       graph.getSession().getService(SerialisationSupport.class);\r
+               \r
+               TGToGraphMap aMap = new TGToGraphMap(delta.a);\r
+               aMap.addOldResources(serializer, oldResources);\r
+               aMap.deny(graph);\r
+               \r
+               TGToGraphMap bMap = new TGToGraphMap(delta.b);\r
+               bMap.addMappedOldResources(serializer, delta.aToB, aMap.getResources());\r
+               bMap.prepare(graph);\r
+               bMap.claim(graph);\r
+               \r
+               return bMap.getResources(serializer);\r
+       }\r
+       \r
+       public static boolean hasChanges(ReadGraph graph, long[] oldResources, TransferableGraphDelta1 delta) throws DatabaseException {\r
+               \r
+               SerialisationSupport serializer = \r
+                       graph.getSession().getService(SerialisationSupport.class);\r
+               \r
+               TGToGraphMap aMap = new TGToGraphMap(delta.a);\r
+               aMap.addOldResources(serializer, oldResources);\r
+               if(aMap.checkDeny(graph)) return true;\r
+               \r
+               TGToGraphMap bMap = new TGToGraphMap(delta.b);\r
+               bMap.addMappedOldResources(serializer, delta.aToB, aMap.getResources());\r
+               bMap.prepare(graph);\r
+               return bMap.checkClaim(graph);\r
+               \r
+       }\r
+\r
+       public static void uninstallGraph(WriteGraph writeGraph, TransferableGraph1 graph,\r
+                       ImportAdvisor advisor) throws TransferableGraphException {\r
+               // TODO HANNU IMPLEMENTS\r
+               throw new UnsupportedOperationException();\r
+       }       \r
+       \r
+       public static long[] importVirtualGraph(Session session, final VirtualGraph vg, final TransferableGraph1 tg, IImportAdvisor advisor) throws DatabaseException {\r
+               final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg, \r
+                               advisor == null ? new ImportAdvisor() : advisor);\r
+               session.syncRequest(new ReadRequest() {\r
+                       @Override\r
+                       public void run(ReadGraph graph) throws DatabaseException {\r
+                               process.prepare(graph);\r
+                       }\r
+               });\r
+               session.syncRequest(new WriteOnlyRequest(vg) {\r
+                       @Override\r
+                       public void perform(WriteOnlyGraph graph) throws DatabaseException {\r
+                               // Needed because process#write does not support virtual WriteOnlyGraph\r
+                               if (vg != null)\r
+                                       process.write2(graph);\r
+                               else\r
+                                       process.write(graph);\r
+                       }\r
+                       \r
+               });\r
+               return process.getResourceIds(session.getService(SerialisationSupport.class));\r
+       }       \r
+\r
+       public static long[] importVirtualGraph(WriteGraph graph, final TransferableGraph1 tg, IImportAdvisor advisor) throws DatabaseException {\r
+               final TransferableGraphImportProcess process = new TransferableGraphImportProcess(tg, \r
+                               advisor == null ? new ImportAdvisor() : advisor);\r
+               process.prepare(graph);\r
+               process.write2(graph);\r
+               return process.getResourceIds(graph.getService(SerialisationSupport.class));\r
+       }       \r
+       \r
+       public static TransferableGraph1 readGraph(File file) throws TransferableGraphException {\r
+               FileVariantAccessor va = null;\r
+               try {\r
+                       va = Accessors.openAccessor(file);\r
+                       Datatype type = va.getContentType();\r
+                       if(type.equals(Datatypes.getDatatype(TransferableGraph1.class))) \r
+                               return  (TransferableGraph1)va.getContentValue(Bindings.getBinding(TransferableGraph1.class));\r
+                       else\r
+                               throw new SerializationException("Unknown transferable graph data type.");\r
+               } catch (AccessorException e) {\r
+                       throw new TransferableGraphException(e);\r
+               } catch (BindingConstructionException e) {\r
+                       throw new TransferableGraphException(e);\r
+               } catch (SerializationException e) {\r
+                       throw new TransferableGraphException(e);\r
+               } catch (AccessorConstructionException e) {\r
+                       throw new TransferableGraphException(e);\r
+               } catch (DatatypeConstructionException e) {\r
+                       throw new TransferableGraphException(e);\r
+               } finally {\r
+                       if(va != null) {\r
+                               try {\r
+                                       va.close();\r
+                               } catch (AccessorException e) {\r
+                               }\r
+                       }\r
+               } \r
+       }\r
+       \r
+       public static void importVirtualGraph(Session session, VirtualGraph vg, File file) throws TransferableGraphException {\r
+               try {\r
+                       importVirtualGraph(session, vg, readGraph(file), new ImportAdvisor());\r
+               } catch (DatabaseException e) {\r
+                       throw new TransferableGraphException(e);\r
+               }\r
+       }\r
+       \r
+       public static VirtualGraph importVirtualGraph(Session session, File file) throws TransferableGraphException {\r
+               VirtualGraphSupport support = session.getService(VirtualGraphSupport.class);\r
+               VirtualGraph vg = support.getMemoryPersistent(UUID.randomUUID().toString());\r
+               importVirtualGraph(session, vg, file);\r
+               return vg;\r
+       }\r
+       \r
+       public static void writeTransferableGraph(RequestProcessor processor, final String format, final TransferableGraphSource source, File target) throws Exception {\r
+               writeTransferableGraph(processor, format, 1, source, target);\r
+       }\r
+\r
+       public static void writeTransferableGraph(RequestProcessor processor, final String format, final int version, final TransferableGraphSource source, File target) throws Exception {\r
+               writeTransferableGraph(processor, format, version, new TreeMap<String,Variant>(), source, target);\r
+       }\r
+\r
+       public static void writeTransferableGraph(RequestProcessor processor, String format, int version, TreeMap<String, Variant> metadata, TransferableGraphSource source, File target) throws Exception {\r
+               writeTransferableGraph(processor, format, version, metadata, source, target, TGStatusMonitor.NULL_MONITOR);\r
+       }\r
+\r
+       public static void writeTransferableGraph(RequestProcessor processor, String format, int version, TreeMap<String, Variant> metadata, TransferableGraphSource source, File target, TGStatusMonitor monitor) throws Exception {\r
+               final Serializer datatypeSerializer = Bindings.getSerializerUnchecked(Datatype.class);\r
+               try (DataOutputStream out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(target), 128*1024))) {\r
+                       DataContainer container = new DataContainer(format, version, metadata, null);\r
+                       DataContainers.writeHeader(out, container);\r
+                       datatypeSerializer.serialize((DataOutput) out, Datatypes.getDatatypeUnchecked(TransferableGraph1.class));\r
+                       writeTransferableGraph(processor, source, out, monitor);\r
+               }\r
+       }\r
+\r
+       private static TGStatusMonitor safeMonitor(TGStatusMonitor mon) {\r
+               return mon == null ? TGStatusMonitor.NULL_MONITOR : mon;\r
+       }\r
+\r
+       private static class CopyingInputStream extends InputStream {\r
+               public DataInput in;\r
+               public DataOutput out;\r
+\r
+               @Override\r
+               public int read() throws IOException {\r
+                       int value = in.readUnsignedByte();\r
+                       out.write(value);\r
+                       return value;\r
+               }\r
+       }\r
+\r
+       private static long copy(byte[] buffer, DataInput in, DataOutput out, long bytesToCopy) throws IOException {\r
+               int read = 0;\r
+               long bufferLength = buffer.length;\r
+               while (read < bytesToCopy) {\r
+                       int l = (int) Math.min(bufferLength, bytesToCopy-read);\r
+                       in.readFully(buffer, 0, l);\r
+                       out.write(buffer, 0, l);\r
+                       read += l;\r
+               }\r
+               return read;\r
+       }\r
+\r
+       private static final int LITERAL_VALUE_IO_BUFFER_SIZE = 128 * 1024;\r
+\r
+       private static void writeTransferableGraph(RequestProcessor processor, final TransferableGraphSource source, final DataOutput out, TGStatusMonitor monitor) throws Exception {\r
+               long start = System.nanoTime();\r
+\r
+               final Serializer datatypeSerializer = Bindings.getSerializerUnchecked(Datatype.class);\r
+               final Serializer identitySerializer = Bindings.getSerializerUnchecked(Identity.class);\r
+               final Serializer extensionSerializer = Bindings.getSerializerUnchecked(Extensions.class);\r
+\r
+               int totalCount = source.getIdentityCount() + source.getStatementCount()/4 + source.getValueCount();\r
+               TGStatusMonitor.Updater progress = new TGStatusMonitor.Updater(safeMonitor(monitor), totalCount);\r
+\r
+               out.writeInt(source.getResourceCount());\r
+               extensionSerializer.serialize(out, new Extensions(source.getExtensions()));\r
+\r
+//             System.err.println("resource count: " + source.getResourceCount());\r
+//             System.err.println("identity count: " + source.getIdentityCount());\r
+\r
+               byte[] buffer = new byte[LITERAL_VALUE_IO_BUFFER_SIZE];\r
+\r
+               processor.syncRequest(new ReadRequest() {\r
+                       @Override\r
+                       public void run(ReadGraph graph) throws DatabaseException {\r
+                               try {\r
+                                       if (monitor.isCanceled())\r
+                                               throw new CancelTransactionException();\r
+\r
+                                       out.writeInt(source.getIdentityCount());\r
+                                       source.forIdentities(graph, value -> {\r
+                                               //System.err.println("id: " + value);\r
+                                               identitySerializer.serialize(out, value);\r
+                                               progress.worked(1);\r
+                                       });\r
+\r
+                                       if (monitor.isCanceled())\r
+                                               throw new CancelTransactionException();\r
+\r
+                                       out.writeInt(source.getStatementCount());\r
+                                       //System.err.println("stms: " + source.getStatementCount());\r
+                                       //int[] counter = {0};\r
+                                       source.forStatements(graph, r -> {\r
+                                               for (int i = 0; i < 4; ++i)\r
+                                                       out.writeInt(r[i]);\r
+                                               //System.err.println("stm " + (counter[0]++) + ": " + r[0] + " " + r[1] + " " + r[2] + " " + r[3]);\r
+                                               progress.worked(1);\r
+                                       });\r
+\r
+                                       if (monitor.isCanceled())\r
+                                               throw new CancelTransactionException();\r
+\r
+                                       out.writeInt(source.getValueCount());\r
+                                       //System.err.println("vals: " + source.getValueCount());\r
+                                       CopyingInputStream cis = new CopyingInputStream();\r
+                                       cis.out = out;\r
+                                       source.forValues2(graph, new TransferableGraphSourceValueProcedure() {\r
+                                               TObjectIntHashMap<Object> identities = new TObjectIntHashMap<>();\r
+\r
+                                               @Override\r
+                                               public void rawCopy(int resource, int length, DataInput input) throws Exception {\r
+                                                       out.writeInt(resource);\r
+                                                       long copied = copy(buffer, input, out, length);\r
+                                                       assert copied == length;\r
+                                                       //System.err.println("value " + (num++) + ": raw variant, " + length + " bytes, copied " + copied + " bytes");\r
+                                                       progress.worked(1);\r
+                                               }\r
+\r
+                                               @Override\r
+                                               public void execute(int resource, Datatype type, DataInput input) throws Exception {\r
+                                                       out.writeInt(resource);\r
+                                                       identities.clear();\r
+                                                       datatypeSerializer.serialize(out, identities, type);\r
+                                                       Binding binding = Bindings.getBinding(type);\r
+                                                       Serializer serializer = Bindings.getSerializer(binding);\r
+                                                       cis.in = input;\r
+                                                       serializer.skip(cis);\r
+                                                       cis.in = null;\r
+                                                       progress.worked(1);\r
+                                               }\r
+                                       });\r
+\r
+                               } catch (DatabaseException e) {\r
+                                       throw e;\r
+                               } catch (Exception e) {\r
+                                       throw new DatabaseException(e);\r
+                               }\r
+                       }\r
+               });\r
+\r
+               long end = System.nanoTime();\r
+               System.err.println("Wrote transferable graph in " + 1e-9*(end-start) + " seconds.");\r
+       }\r
+\r
+       public static TransferableGraph1 create(ReadGraph graph, TransferableGraphSource source) throws DatabaseException {\r
+               \r
+               final TIntArrayList statements = new TIntArrayList();\r
+               final ArrayList<Value> values = new ArrayList<>();\r
+               final ArrayList<Identity> identities = new ArrayList<>();\r
+               \r
+               try {\r
+\r
+                       source.forStatements(graph, r -> statements.addAll(r));\r
+                       source.forValues(graph, v -> values.add(v));\r
+                       source.forIdentities(graph, i -> identities.add(i));\r
+\r
+                       return new TransferableGraph1(source.getResourceCount(), \r
+                                       identities.toArray(new Identity[identities.size()]),\r
+                                       statements.toArray(),\r
+                                       values.toArray(new Value[values.size()]),\r
+                                       source.getExtensions());\r
+                       \r
+               } catch (Exception e) {\r
+                       \r
+                       throw new DatabaseException(e);\r
+                       \r
+               }\r
+               \r
+       }\r
+\r
+}\r