Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.databoard / src / org / simantics / databoard / accessor / java / JavaString.java

diff --git a/bundles/org.simantics.databoard/src/org/simantics/databoard/accessor/java/JavaString.java b/bundles/org.simantics.databoard/src/org/simantics/databoard/accessor/java/JavaString.java
new file mode 100644 (file)
index 0000000..345cd7d
--- /dev/null
+++ b/bundles/org.simantics.databoard/src/org/simantics/databoard/accessor/java/JavaString.java
@@ -0,0 +1,141 @@
+/*******************************************************************************\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.accessor.java;
+
+import org.simantics.databoard.Bindings;\r
+import org.simantics.databoard.accessor.Accessor;\r
+import org.simantics.databoard.accessor.StringAccessor;\r
+import org.simantics.databoard.accessor.error.AccessorConstructionException;\r
+import org.simantics.databoard.accessor.error.AccessorException;\r
+import org.simantics.databoard.accessor.error.ReferenceException;\r
+import org.simantics.databoard.accessor.event.Event;\r
+import org.simantics.databoard.accessor.event.ValueAssigned;\r
+import org.simantics.databoard.accessor.impl.AccessorParams;\r
+import org.simantics.databoard.accessor.impl.ListenerEntry;\r
+import org.simantics.databoard.accessor.interestset.StringInterestSet;\r
+import org.simantics.databoard.accessor.reference.ChildReference;\r
+import org.simantics.databoard.binding.ArrayBinding;\r
+import org.simantics.databoard.binding.Binding;\r
+import org.simantics.databoard.binding.RecordBinding;\r
+import org.simantics.databoard.binding.StringBinding;\r
+import org.simantics.databoard.binding.VariantBinding;\r
+import org.simantics.databoard.binding.error.BindingException;\r
+import org.simantics.databoard.type.StringType;\r
+
+public class JavaString extends JavaObject implements StringAccessor {
+       
+       public JavaString(Accessor parent, StringBinding binding, Object object, AccessorParams params) {
+               super(parent, binding, object, params);
+       }
+       
+       public StringBinding getBinding() {
+               return (StringBinding) binding;
+       }
+
+       @Override
+       public StringType type() {
+               return getBinding().type();
+       }
+
+       @Override
+       public String getValue() throws AccessorException {\r
+               readLock();
+               try {
+                       return getBinding().getValue(object);
+               } catch (BindingException e) {
+                       throw new AccessorException(e);
+               } finally {\r
+                       readUnlock();\r
+               }
+       }       
+       
+       @Override
+       public void setValue(String newValue) throws AccessorException {
+               if (newValue.equals( getValue() )) return;\r
+               writeLock();\r
+               try {
+                       if (binding.isImmutable() && parent!=null && parent instanceof JavaArray) {\r
+                               JavaObject jo = (JavaObject) parent;\r
+                               ArrayBinding ab = (ArrayBinding) jo.binding;\r
+                               Object nv = getBinding().create(newValue);\r
+                               ab.set(jo.object, (Integer)keyInParent, nv);\r
+                               this.object = nv;\r
+                       } else if (binding.isImmutable() && parent!=null && parent instanceof JavaRecord) {\r
+                               JavaObject jo = (JavaObject) parent;\r
+                               RecordBinding rb = (RecordBinding) jo.binding;\r
+                               Object nv = getBinding().create(newValue);\r
+                               rb.setComponent(jo.object, (Integer)keyInParent, nv);\r
+                               this.object = nv;\r
+                       } else if (binding.isImmutable() && parent!=null && parent instanceof JavaVariant) {\r
+                               JavaObject jo = (JavaObject) parent;\r
+                               VariantBinding vb = (VariantBinding) jo.binding;\r
+                               Object nv = getBinding().create(newValue);\r
+                               vb.setContent(jo.object, getBinding(), nv);\r
+                               this.object = nv;\r
+                       } else {                        \r
+                               // Set value\r
+                               getBinding().setValue(object, newValue);\r
+                       }\r
+\r
+                       
+                       // Notify
+                       ListenerEntry le = listeners;
+                       while (le!=null) {
+                               StringInterestSet is = le.getInterestSet();
+                               if (is.inNotifications()) {
+                                       Event e = new ValueAssigned( Bindings.STRING, is.inValues() ? newValue : null );
+                                       emitEvent(le, e);
+                               }
+                               le = le.next;
+                       }
+                       
+               } catch (BindingException e) {
+                       throw new AccessorException(e);
+               } finally {\r
+                       writeUnlock();\r
+               }
+       }
+
+       @Override
+       public void setValue(Binding binding, Object newValue) throws AccessorException {
+               try {
+                       String nv = ((StringBinding)binding).getValue(newValue);
+                       setValue(nv);
+               } catch (BindingException e) {
+                       throw new AccessorException(e);
+               }
+       }
+
+       @SuppressWarnings("unchecked")
+       @Override
+       public <T extends Accessor> T getComponent(ChildReference reference)
+       throws AccessorConstructionException {
+               if (reference==null) return (T) this;           
+               throw new ReferenceException(reference.getClass()+" is not a subreference of StringType");      
+       }
+
+       @Override
+       Event applyLocal(Event e, boolean makeRollback) throws AccessorException {\r
+               Event rollback = makeRollback ? new ValueAssigned( Bindings.STRING, getValue() ) : null;                \r
+               if (e instanceof ValueAssigned) {\r
+                       ValueAssigned va = (ValueAssigned) e;\r
+                       if (va.newValue == null) throw new AccessorException("String value expected, got null");\r
+                       setValue(va.newValue.getBinding(), va.newValue.getValue());\r
+                       return rollback;\r
+               } else {\r
+                       throw new AccessorException("Cannot apply "+e.getClass().getName()+" to String");                       \r
+               }
+       }
+
+}
+
+