Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.databoard / src / org / simantics / databoard / serialization / impl / VariantSerializer.java

diff --git a/bundles/org.simantics.databoard/src/org/simantics/databoard/serialization/impl/VariantSerializer.java b/bundles/org.simantics.databoard/src/org/simantics/databoard/serialization/impl/VariantSerializer.java
new file mode 100644 (file)
index 0000000..ccf7938
--- /dev/null
+++ b/bundles/org.simantics.databoard/src/org/simantics/databoard/serialization/impl/VariantSerializer.java
@@ -0,0 +1,139 @@
+package org.simantics.databoard.serialization.impl;\r
+\r
+import gnu.trove.map.hash.TObjectIntHashMap;\r
+\r
+import java.io.DataInput;\r
+import java.io.DataOutput;\r
+import java.io.IOException;\r
+import java.util.ArrayList;\r
+import java.util.List;\r
+\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.databoard.binding.Binding;\r
+import org.simantics.databoard.binding.VariantBinding;\r
+import org.simantics.databoard.binding.error.BindingException;\r
+import org.simantics.databoard.serialization.Serializer;\r
+import org.simantics.databoard.serialization.Serializer.RecursiveSerializer;\r
+import org.simantics.databoard.serialization.SerializerScheme;\r
+import org.simantics.databoard.type.Datatype;\r
+\r
+/**\r
+ * Serializes Variant instances using bindings from Bindings.getBinding for\r
+ * deserialization. These are assumed to be immutable bindings.\r
+ * \r
+ * @author Toni Kalajainen\r
+ */\r
+public class VariantSerializer extends RecursiveSerializer {\r
+       \r
+       VariantBinding binding;\r
+       Serializer datatypeSerializer;          \r
+       SerializerScheme scheme;\r
+       \r
+       public VariantSerializer(VariantBinding binding, SerializerScheme scheme) {                     \r
+               this.binding = binding;                 \r
+               this.scheme = scheme;\r
+       }\r
+       \r
+       @Override\r
+       public void finalizeConstruction() {\r
+               Binding dataTypeBinding = Bindings.getBindingUnchecked( Datatype.class );\r
+               this.datatypeSerializer = scheme.getSerializerUnchecked(dataTypeBinding);\r
+       }\r
+\r
+       @Override\r
+       public Object deserialize(DataInput in, List<Object> identities) throws IOException {                   \r
+               try {\r
+                       List<Object> typeIdentities = new ArrayList<Object>(1);\r
+                       Datatype type = (Datatype) datatypeSerializer.deserialize(in, typeIdentities);\r
+                       Binding valueBinding = Bindings.getBinding(type);\r
+                       Serializer valueSerializer = scheme.getSerializerUnchecked(valueBinding);\r
+                       assertRemainingBytes(in, valueSerializer.getMinSize());\r
+                       Object value = valueSerializer.deserialize(in, identities);\r
+                       return binding.create(valueBinding, value);\r
+               } catch (BindingException e) {\r
+                       throw new IOException( e ); \r
+               }\r
+       }\r
+       \r
+       @Override\r
+       public void deserializeTo(DataInput in, List<Object> identities, Object obj) throws IOException {\r
+               try {\r
+                       List<Object> typeIdentities = new ArrayList<Object>(1);                         \r
+                       Datatype type = (Datatype) datatypeSerializer.deserialize(in, typeIdentities);\r
+                       Datatype oldType = binding.getContentType(obj);\r
+               \r
+                       if (type.equals(oldType)) {\r
+                               Binding valueBinding = binding.getContentBinding(obj);\r
+                               Serializer valueSerializer = scheme.getSerializerUnchecked(valueBinding);\r
+                               Object component = binding.getContent(obj);\r
+//                             assertRemainingBytes(in, valueSerializer.getMinSize());\r
+                               component = valueSerializer.deserializeToTry(in, identities, component);\r
+                               binding.setContent(obj, valueBinding, component);\r
+                       } else {\r
+                               Binding valueBinding = Bindings.getBinding(type);\r
+                               Serializer valueSerializer = scheme.getSerializerUnchecked(valueBinding);\r
+//                             assertRemainingBytes(in, valueSerializer.getMinSize());\r
+                               Object component = valueSerializer.deserialize(in, identities);\r
+                               binding.setContent(obj, valueBinding, component);\r
+                       }\r
+               } catch (BindingException e) {\r
+                       throw new IOException( e ); \r
+               }\r
+       }\r
+\r
+       @Override\r
+       public void skip(DataInput in, List<Object> identities) throws IOException {\r
+               List<Object> typeIdentities = new ArrayList<Object>(1);                         \r
+               Datatype type = (Datatype) datatypeSerializer.deserialize(in, typeIdentities);                          \r
+               Binding valueBinding = Bindings.getBinding(type);\r
+               Serializer valueSerializer = scheme.getSerializerUnchecked(valueBinding);\r
+               valueSerializer.skip(in, identities);\r
+       }               \r
+       \r
+       @Override\r
+       public void serialize(DataOutput out, TObjectIntHashMap<Object> identities, Object variant) throws IOException {\r
+               try {\r
+                       TObjectIntHashMap<Object> typeIdentities = new TObjectIntHashMap<Object>(1);\r
+                       Datatype type = binding.getContentType(variant);\r
+                       datatypeSerializer.serialize(out, typeIdentities, type);                                \r
+                               \r
+                       Binding valueBinding = binding.getContentBinding(variant);\r
+                       Object value = binding.getContent(variant, valueBinding);\r
+                               \r
+                       Serializer valueSerializer = scheme.getSerializerUnchecked(valueBinding);\r
+                       valueSerializer.serialize(out, identities, value);\r
+               } catch (BindingException e) {\r
+                       throw new IOException( e ); \r
+               }\r
+       }\r
+\r
+       @Override\r
+       public Integer getConstantSize() {                      \r
+               return null;\r
+       }\r
+\r
+       @Override\r
+       public int getSize(Object variant, TObjectIntHashMap<Object> identities) throws IOException \r
+       {\r
+               try {\r
+                       TObjectIntHashMap<Object> typeIdentities = new TObjectIntHashMap<Object>(1);\r
+                       Datatype type = binding.getContentType(variant);\r
+                       int size = datatypeSerializer.getSize(type, typeIdentities);\r
+                               \r
+                       Binding valueBinding = binding.getContentBinding(variant);\r
+                       Object value = binding.getContent(variant, valueBinding);\r
+                               \r
+                       Serializer valueSerializer = scheme.getSerializerUnchecked(valueBinding);\r
+                       size += valueSerializer.getSize(value, identities);\r
+                       return size;\r
+               } catch (BindingException e) {\r
+                       throw new IOException( e ); \r
+               }\r
+       }\r
+       \r
+       @Override\r
+       public int getMinSize() {\r
+               return datatypeSerializer.getMinSize();\r
+       }\r
+       \r
+}
\ No newline at end of file