1 /*******************************************************************************
2 * Copyright (c) 2010 Association for Decentralized Information Management in
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
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.databoard.binding.impl;
14 import java.util.Objects;
17 import org.simantics.databoard.adapter.AdaptException;
18 import org.simantics.databoard.adapter.AdapterFactory;
19 import org.simantics.databoard.binding.Binding;
20 import org.simantics.databoard.binding.RecordBinding;
21 import org.simantics.databoard.binding.UnionBinding;
22 import org.simantics.databoard.binding.VariantBinding;
23 import org.simantics.databoard.binding.error.BindingConstructionException;
24 import org.simantics.databoard.binding.error.BindingException;
25 import org.simantics.databoard.binding.factory.BindingRepository;
26 import org.simantics.databoard.binding.reflection.BindingRequest;
27 import org.simantics.databoard.binding.reflection.ClassBindingFactory;
28 import org.simantics.databoard.binding.reflection.VoidBinding;
29 import org.simantics.databoard.type.Datatype;
30 import org.simantics.databoard.type.RecordType;
31 import org.simantics.databoard.type.UnionType;
34 * ObjectVariantBinding binds VariantType and Object.class.
35 * The implementation is immutable as Object.class is not a container, it is
38 * ObjectVariantBinding understands many classes
39 * Collections: ArrayList, List, LinkedList, int[], .., other arrays [], Map, TreeMap, HashMap, Set, HashSet, TreeSet,
41 * immutable primitives: Integer, Boolean, ...
42 * mutable primitives: MutableInteger, MutableBoolean, ...
43 * classes: Record-classes, Bean-Classes, Immutable-Classes
44 * <code>null</code> is bound to a void.
46 * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
48 public class ObjectVariantBinding extends VariantBinding {
50 ClassBindingFactory bindingFactory;
51 AdapterFactory adapterFactory;
53 public ObjectVariantBinding(ClassBindingFactory bindingFactory, AdapterFactory adapterFactory) {
54 this.bindingFactory = bindingFactory;
55 this.adapterFactory = adapterFactory;
58 public ClassBindingFactory getBindingFactory() {
59 return bindingFactory;
62 public BindingRepository getRepository() {
63 return bindingFactory.getRepository();
67 public Object create(Binding srcBinding, Object value) throws BindingException {
68 if (srcBinding instanceof VoidBinding) return null;
72 //Annotation[] annotations = new Annotation[ srcBinding.getComponentCount() ];
73 BindingRequest request = new BindingRequest( value.getClass() );
74 //request.componentBinding = srcBinding.getComponentCount()>0?srcBinding.getComponentBinding(0):null;
75 Binding dstBinding = bindingFactory.getBinding( request );
76 return adapterFactory.adapt(value, srcBinding, dstBinding);
77 } catch (BindingConstructionException e) {
78 throw new BindingException(e);
79 } catch (AdaptException e) {
80 throw new BindingException(e);
85 public Binding getContentBinding(Object variant) throws BindingException {
87 if (variant==null) return VoidBinding.VOID_BINDING;
88 BindingRequest request = new BindingRequest(variant.getClass());
89 return bindingFactory.construct(request);
90 } catch (BindingConstructionException e) {
91 throw new BindingException(e);
96 public Datatype getContentType(Object variant) throws BindingException {
97 return getContentBinding(variant).type();
101 public Object getContent(Object variant, Binding binding)
102 throws BindingException {
104 Binding binding1 = getContentBinding(variant);
105 Object value1 = variant;
107 Binding binding2 = binding;
108 Object value2 = adapterFactory.adapt(value1, binding1, binding2);
111 } catch (AdaptException e) {
112 throw new BindingException(e);
117 public Object getContent(Object variant)
118 throws BindingException {
123 public void setContent(Object variant, Binding binding, Object value)
124 throws BindingException {
125 if (variant==value) return;
127 Binding binding1 = getContentBinding(variant);
128 Datatype type1 = binding1.type();
130 Binding binding2 = binding;
131 Datatype type2 = binding2.type();
133 // New value cannot be assigned to Object from different data type
134 if (!type1.equals(type2)) {
135 throw new BindingException("Cannot assign "+value.getClass()+" to "+variant.getClass());
138 // Can only assing to union or record of previous type
139 if (type1 instanceof RecordType) {
140 RecordType recordType = (RecordType) type1;
141 int count = recordType.getComponentCount();
142 RecordBinding rb1 = (RecordBinding) binding1;
143 RecordBinding rb2 = (RecordBinding) binding2;
144 Object resultValues[] = new Object[count];
145 for (int i=0; i<count; i++) {
146 Binding cb1 = rb1.componentBindings[i];
147 Binding cb2 = rb2.componentBindings[i];
149 Object componentValue2 = rb2.getComponent(value, i);
150 Object componentValue1 = adapterFactory.adapt(componentValue2, cb2, cb1);
151 resultValues[i] = componentValue1;
153 rb1.setComponents(variant, resultValues);
154 } else if (type1 instanceof UnionType) {
155 UnionBinding ub1 = (UnionBinding) binding1;
156 UnionBinding ub2 = (UnionBinding) binding2;
157 int tag = ub2.getTag(value);
158 Binding cb1 = ub1.getComponentBindings()[tag];
159 Binding cb2 = ub2.getComponentBindings()[tag];
161 Object componentValue2 = ub2.getValue(value);
162 Object componentValue1 = adapterFactory.adapt(componentValue2, cb2, cb1);
164 ub1.setValue(variant, tag, componentValue1);
166 throw new BindingException("Cannot assign "+value.getClass()+" to "+variant.getClass());
169 } catch (AdaptException e) {
170 throw new BindingException(e);
176 public void assertInstaceIsValid(Object obj, Set<Object> validInstances) throws BindingException {
177 getContentBinding(obj).assertInstaceIsValid(obj);
181 public boolean isInstance(Object obj) {
186 public boolean isImmutable() {
191 protected boolean baseEquals(Object obj) {
192 ObjectVariantBinding o = (ObjectVariantBinding)obj;
193 return super.baseEquals( obj ) && o.adapterFactory == adapterFactory && o.bindingFactory == bindingFactory;
197 public boolean equals(Object o1, Object o2) {
198 return Objects.equals(o1, o2);