Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.databoard / src / org / simantics / databoard / binding / mutable / ImmutableVariantBinding.java

diff --git a/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/mutable/ImmutableVariantBinding.java b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/mutable/ImmutableVariantBinding.java
new file mode 100644 (file)
index 0000000..3301c8d
--- /dev/null
+++ b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/mutable/ImmutableVariantBinding.java
@@ -0,0 +1,117 @@
+/*******************************************************************************\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
+       }
+}