bundles/org.simantics.databoard/src/org/simantics/databoard/serialization/impl/MutableVariantSerializer.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012 Association for Decentralized Information Management in
   3  * Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.databoard.serialization.impl;
  13
  14 import java.io.DataInput;
  15 import java.io.IOException;
  16 import java.util.ArrayList;
  17 import java.util.List;
  18
  19 import org.simantics.databoard.Bindings;
  20 import org.simantics.databoard.binding.Binding;
  21 import org.simantics.databoard.binding.VariantBinding;
  22 import org.simantics.databoard.binding.error.BindingException;
  23 import org.simantics.databoard.serialization.Serializer;
  24 import org.simantics.databoard.serialization.SerializerScheme;
  25 import org.simantics.databoard.type.Datatype;
  26
  27 /**
  28  * A version of VariantSerializer that uses Bindings.getMutableBinding instead
  29  * of Bindings.getBinding for deserialization.
  30  *
  31  * @author Tuukka Lehtonen
  32  */
  33 public class MutableVariantSerializer extends VariantSerializer {
  34
  35         public MutableVariantSerializer(VariantBinding binding, SerializerScheme scheme) {
  36                 super(binding, scheme);
  37         }
  38
  39         @Override
  40         public Object deserialize(DataInput in, List<Object> identities) throws IOException {
  41                 try {
  42                         List<Object> typeIdentities = new ArrayList<Object>(1);
  43                         Datatype type = (Datatype) datatypeSerializer.deserialize(in, typeIdentities);
  44                         Binding valueBinding = Bindings.getMutableBinding(type);
  45                         Serializer valueSerializer = scheme.getSerializerUnchecked(valueBinding);
  46                         assertRemainingBytes(in, valueSerializer.getMinSize());
  47                         Object value = valueSerializer.deserialize(in, identities);
  48                         return binding.create(valueBinding, value);
  49                 } catch (BindingException e) {
  50                         throw new IOException( e );
  51                 }
  52         }
  53
  54         @Override
  55         public void deserializeTo(DataInput in, List<Object> identities, Object obj) throws IOException {
  56                 try {
  57                         List<Object> typeIdentities = new ArrayList<Object>(1);
  58                         Datatype type = (Datatype) datatypeSerializer.deserialize(in, typeIdentities);
  59                         Datatype oldType = binding.getContentType(obj);
  60
  61                         if (type.equals(oldType)) {
  62                                 Binding valueBinding = binding.getContentBinding(obj);
  63                                 Serializer valueSerializer = scheme.getSerializerUnchecked(valueBinding);
  64                                 Object component = binding.getContent(obj);
  65 //                              assertRemainingBytes(in, valueSerializer.getMinSize());
  66                                 component = valueSerializer.deserializeToTry(in, identities, component);
  67                                 binding.setContent(obj, valueBinding, component);
  68                         } else {
  69                                 Binding valueBinding = Bindings.getMutableBinding(type);
  70                                 Serializer valueSerializer = scheme.getSerializerUnchecked(valueBinding);
  71 //                              assertRemainingBytes(in, valueSerializer.getMinSize());
  72                                 Object component = valueSerializer.deserialize(in, identities);
  73                                 binding.setContent(obj, valueBinding, component);
  74                         }
  75                 } catch (BindingException e) {
  76                         throw new IOException( e );
  77                 }
  78         }
  79
  80         @Override
  81         public void skip(DataInput in, List<Object> identities) throws IOException {
  82                 List<Object> typeIdentities = new ArrayList<Object>(1);
  83                 Datatype type = (Datatype) datatypeSerializer.deserialize(in, typeIdentities);
  84                 Binding valueBinding = Bindings.getMutableBinding(type);
  85                 Serializer valueSerializer = scheme.getSerializerUnchecked(valueBinding);
  86                 valueSerializer.skip(in, identities);
  87         }
  88
  89 }