bundles/org.simantics.databoard/src/org/simantics/databoard/binding/mutable/MutableVariantBinding.java

   1 /*******************************************************************************
   2  *  Copyright (c) 2010 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.binding.mutable;
  13
  14 import java.util.Set;
  15
  16 import org.simantics.databoard.adapter.AdapterFactory;
  17 import org.simantics.databoard.binding.Binding;
  18 import org.simantics.databoard.binding.error.BindingException;
  19 import org.simantics.databoard.binding.reflection.ClassBindingFactory;
  20
  21 /**
  22  * MutableVariantBinding binds VariantType to {@link MutableVariant} Class.
  23  */
  24 public class MutableVariantBinding extends ImmutableVariantBinding {
  25
  26         public MutableVariantBinding(ClassBindingFactory bindingFactory, AdapterFactory adapterFactory) {
  27                 super(bindingFactory, adapterFactory);
  28         }
  29
  30         @Override
  31         public Object create(Binding binding, Object value) throws BindingException {
  32                 return new MutableVariant(binding, value);
  33         }
  34
  35         @Override
  36         public boolean isImmutable() {
  37                 return false;
  38         }
  39
  40         @Override
  41         public boolean isInstance(Object obj) {
  42                 if (obj==null) return false;
  43                 if (obj instanceof MutableVariant == false) return false;
  44                 return true;
  45         }
  46
  47         @Override
  48         public void assertInstaceIsValid(Object obj, Set<Object> validInstances) throws BindingException {
  49                 if (obj==null) throw new BindingException("null value is not MutableVariant");
  50                 if (obj instanceof MutableVariant == false) throw new BindingException("wrong class, MutableVariant expected");
  51                 MutableVariant var = (MutableVariant) obj;
  52                 if (var.binding==null) throw new BindingException("Binding is expected");
  53                 var.binding.assertInstaceIsValid(var.value, validInstances);
  54         }
  55
  56         @Override
  57         public void setContent(Object variant, Binding binding, Object value)
  58                         throws BindingException {
  59                 assert(isValid(binding, value));
  60                 MutableVariant var = (MutableVariant) variant;
  61                 var.binding = binding;
  62                 var.value = value;
  63         }
  64
  65 }