bundles/org.simantics.databoard/src/org/simantics/databoard/accessor/java/JavaInteger.java

   1 /*******************************************************************************\r
   2  *  Copyright (c) 2010 Association for Decentralized Information Management in\r
   3  *  Industry THTH ry.\r
   4  *  All rights reserved. This program and the accompanying materials\r
   5  *  are made available under the terms of the Eclipse Public License v1.0\r
   6  *  which accompanies this distribution, and is available at\r
   7  *  http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  *  Contributors:\r
  10  *      VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.databoard.accessor.java;
  13
  14 import org.simantics.databoard.Bindings;\r
  15 import org.simantics.databoard.accessor.Accessor;\r
  16 import org.simantics.databoard.accessor.IntegerAccessor;\r
  17 import org.simantics.databoard.accessor.error.AccessorConstructionException;\r
  18 import org.simantics.databoard.accessor.error.AccessorException;\r
  19 import org.simantics.databoard.accessor.error.ReferenceException;\r
  20 import org.simantics.databoard.accessor.event.Event;\r
  21 import org.simantics.databoard.accessor.event.ValueAssigned;\r
  22 import org.simantics.databoard.accessor.impl.AccessorParams;\r
  23 import org.simantics.databoard.accessor.impl.ListenerEntry;\r
  24 import org.simantics.databoard.accessor.interestset.IntegerInterestSet;\r
  25 import org.simantics.databoard.accessor.reference.ChildReference;\r
  26 import org.simantics.databoard.binding.ArrayBinding;\r
  27 import org.simantics.databoard.binding.Binding;\r
  28 import org.simantics.databoard.binding.IntegerBinding;\r
  29 import org.simantics.databoard.binding.RecordBinding;\r
  30 import org.simantics.databoard.binding.VariantBinding;\r
  31 import org.simantics.databoard.binding.error.BindingException;\r
  32 import org.simantics.databoard.type.IntegerType;\r
  33
  34 public class JavaInteger extends JavaObject implements IntegerAccessor {
  35
  36         public JavaInteger(Accessor parent, IntegerBinding binding, Object object, AccessorParams params) {
  37                 super(parent, binding, object, params);
  38         }
  39
  40         public IntegerBinding getBinding() {
  41                 return (IntegerBinding) binding;
  42         }
  43
  44         @Override
  45         public IntegerType type() {
  46                 return getBinding().type();
  47         }
  48
  49         @Override
  50         public int getValue() throws AccessorException {\r
  51                 readLock();
  52                 try {
  53                         return getBinding().getValue_(object);
  54                 } catch (BindingException e) {
  55                         throw new AccessorException(e);
  56                 } finally {\r
  57                         readUnlock();\r
  58                 }
  59         }
  60
  61         @Override
  62         public void setValue(int newValue) throws AccessorException {
  63                 if (newValue == getValue()) return;\r
  64                 try {
  65                         if (binding.isImmutable() && parent!=null && parent instanceof JavaArray) {\r
  66                                 JavaObject jo = (JavaObject) parent;\r
  67                                 ArrayBinding ab = (ArrayBinding) jo.binding;\r
  68                                 Object nv = getBinding().create(newValue);\r
  69                                 ab.set(jo.object, (Integer)keyInParent, nv);\r
  70                                 this.object = nv;\r
  71                         } else if (binding.isImmutable() && parent!=null && parent instanceof JavaRecord) {\r
  72                                 JavaObject jo = (JavaObject) parent;\r
  73                                 RecordBinding rb = (RecordBinding) jo.binding;\r
  74                                 Object nv = getBinding().create(newValue);\r
  75                                 rb.setComponent(jo.object, (Integer)keyInParent, nv);\r
  76                                 this.object = nv;\r
  77                         } else if (binding.isImmutable() && parent!=null && parent instanceof JavaVariant) {\r
  78                                 JavaObject jo = (JavaObject) parent;\r
  79                                 VariantBinding vb = (VariantBinding) jo.binding;\r
  80                                 Object nv = getBinding().create(newValue);\r
  81                                 vb.setContent(jo.object, getBinding(), nv );\r
  82                                 this.object = nv;\r
  83                         } else {                        \r
  84                                 // Set value\r
  85                                 getBinding().setValue(object, newValue);\r
  86                         }\r
  87
  88                         // Notify
  89                         ListenerEntry le = listeners;
  90                         while (le!=null) {
  91                                 IntegerInterestSet is = le.getInterestSet();
  92                                 if (is.inNotifications()) {
  93                                         Event e = new ValueAssigned( Bindings.INTEGER, is.inValues() ? newValue : null );
  94                                         emitEvent(le, e);
  95                                 }
  96                                 le = le.next;
  97                         }
  98
  99                 } catch (BindingException e) {
 100                         throw new AccessorException(e);
 101                 }
 102         }
 103
 104         @Override
 105         public void setValue(Binding binding, Object newValue) throws AccessorException {
 106                 try {
 107                         int nv = ((IntegerBinding)binding).getValue_(newValue);
 108                         setValue(nv);
 109                 } catch (BindingException e) {
 110                         throw new AccessorException(e);
 111                 }
 112         }
 113
 114         @SuppressWarnings("unchecked")
 115         @Override
 116         public <T extends Accessor> T getComponent(ChildReference reference)
 117         throws AccessorConstructionException {
 118                 if (reference==null) return (T) this;
 119
 120                 throw new ReferenceException(reference.getClass()+" is not a subreference of BooleanType");
 121         }
 122
 123         @Override
 124         Event applyLocal(Event e, boolean makeRollback) throws AccessorException {\r
 125                 Event rollback = makeRollback ? new ValueAssigned( Bindings.INTEGER, getValue() ) : null;               \r
 126                 if (e instanceof ValueAssigned) {\r
 127                         ValueAssigned va = (ValueAssigned) e;\r
 128                         if (va.newValue == null) throw new AccessorException("Integer value expected, got null");                       \r
 129                         setValue(va.newValue.getBinding(), va.newValue.getValue());\r
 130                         return rollback;\r
 131                 } else {\r
 132                         throw new AccessorException("Cannot apply "+e.getClass().getName()+" to Integer");\r
 133                 }
 134         }
 135
 136 }
 137