+/*******************************************************************************\r
+ * Copyright (c) 2010 Association for Decentralized Information Management in\r
+ * 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.databoard.binding.mutable;
+
+import java.util.Set;\r
+\r
+import org.simantics.databoard.adapter.AdaptException;\r
+import org.simantics.databoard.adapter.AdapterFactory;\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.binding.reflection.ClassBindingFactory;\r
+import org.simantics.databoard.type.Datatype;\r
+
+/**
+ * ImmutableVariantBinding binds VariantType to {@link Variant} Class.
+ */
+public class ImmutableVariantBinding extends VariantBinding {
+ \r
+ ClassBindingFactory bindingFactory;\r
+ AdapterFactory adapterFactory;\r
+
+ public ImmutableVariantBinding(ClassBindingFactory bindingFactory, AdapterFactory adapterFactory) {\r
+ this.bindingFactory = bindingFactory;\r
+ this.adapterFactory = adapterFactory;\r
+ }
+
+ @Override
+ public boolean isImmutable() {
+ return true;
+ }
+
+ @Override
+ public Object create(Binding binding, Object value) throws BindingException {
+ return new Variant(binding, value);
+ }
+
+ @Override
+ public Binding getContentBinding(Object variant) throws BindingException {
+ Variant result = (Variant) variant;
+ return result.binding;
+ }
+
+ @Override
+ public Datatype getContentType(Object variant) throws BindingException {
+ Variant result = (Variant) variant;
+ return result.binding.type();
+ }
+
+ @Override
+ public Object getContent(Object variant, Binding binding) throws BindingException {
+ Variant var = (Variant) variant;
+ try {
+ Binding binding1 = var.binding;
+ Object value1 = var.value;
+ Binding binding2 = binding;
+ Object value2 = adapterFactory.adapt(value1, binding1, binding2);
+ return value2;
+ } catch (AdaptException e) {
+ throw new BindingException(e);
+ }
+ }
+
+ public Object getContent(Object variant) throws BindingException {
+ Variant var = (Variant) variant;
+ return var.value;
+ }
+
+ @Override
+ public void setContent(Object variant, Binding binding, Object value)
+ throws BindingException {\r
+ Variant var = (Variant) variant;\r
+ if (var.binding == binding && var.value==value) return;\r
+ throw new BindingException("Cannot write to immutable variant");
+ }
+
+ @Override
+ public void assertInstaceIsValid(Object obj, Set<Object> validInstances) throws BindingException {
+ if (obj==null) throw new BindingException("null value is not Variant");
+ if (obj instanceof Variant == false) throw new BindingException("wrong class, Variant expected");
+ Variant var = (Variant) obj;
+ if (var.binding==null) throw new BindingException("Binding is expected");
+ var.binding.assertInstaceIsValid(var.value, validInstances);
+ }
+
+ @Override
+ public boolean isInstance(Object obj) {
+ if (obj==null) return false;
+ if (obj instanceof Variant == false) return false;
+ return true;
+ }
+
+ boolean isValid(Binding binding, Object obj) throws BindingException {
+ binding.assertInstaceIsValid(obj);
+ return true;
+ }
+\r
+ @Override\r
+ public int baseHashCode() {\r
+ return super.baseHashCode() + 7 * adapterFactory.hashCode() + 13 * bindingFactory.hashCode(); \r
+ }\r
+ \r
+ @Override\r
+ protected boolean baseEquals(Object obj) {\r
+ ImmutableVariantBinding o = (ImmutableVariantBinding)obj;\r
+ return super.baseEquals(obj) && o.adapterFactory == adapterFactory && o.bindingFactory == bindingFactory;\r
+ }
+}