Migrated source code from Simantics SVN

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

diff --git a/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/mutable/ContainerOptionalBinding.java b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/mutable/ContainerOptionalBinding.java
new file mode 100644 (file)
index 0000000..df4fd54
--- /dev/null
+++ b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/mutable/ContainerOptionalBinding.java
@@ -0,0 +1,72 @@
+/*******************************************************************************\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 org.simantics.databoard.binding.Binding;\r
+import org.simantics.databoard.binding.OptionalBinding;\r
+import org.simantics.databoard.binding.error.BindingException;\r
+import org.simantics.databoard.type.OptionalType;\r
+
+/**
+ * Binds OptionalType to ValueContainer
+ *
+ * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
+ */
+public class ContainerOptionalBinding extends OptionalBinding {
+
+       public ContainerOptionalBinding(Binding componentBinding) {
+               super(componentBinding);
+       }
+
+       public ContainerOptionalBinding(OptionalType type, Binding componentBinding) {
+               super(type, componentBinding);
+       }\r
+       
+       @Override
+       public boolean hasValue(Object arg) {
+               return ((ValueContainer)arg).value != null;
+       }
+
+       @Override
+       public Object getValue(Object arg) {
+               return ((ValueContainer)arg).value;
+       }
+       
+       @Override
+       public Object createNoValue() {
+               return new ValueContainer();
+       }
+       
+       @Override
+       public Object createValue(Object value) throws BindingException {
+               ValueContainer result = new ValueContainer();
+               result.value = value;
+               return result;
+       }
+       
+       @Override
+       public boolean isInstance(Object obj) {
+               return obj instanceof ValueContainer;
+       }
+       
+       @Override
+       public void setValue(Object optional, Object componentValue)
+       throws BindingException {
+               ((ValueContainer) optional).value = componentValue;
+       }
+       
+       @Override
+       public void setNoValue(Object optional) throws BindingException {
+               ((ValueContainer) optional).value = null;               
+       }
+}
+