bundles/org.simantics.databoard/src/org/simantics/databoard/accessor/java/JavaFloat.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.FloatAccessor;\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.FloatInterestSet;\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.FloatBinding;\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.FloatType;\r
  33
  34 public class JavaFloat extends JavaObject implements FloatAccessor {
  35
  36         public JavaFloat(Accessor parent, FloatBinding binding, Object object, AccessorParams params) {
  37                 super(parent, binding, object, params);
  38         }
  39
  40         public FloatBinding getBinding() {
  41                 return (FloatBinding) binding;
  42         }
  43
  44         @Override
  45         public FloatType type() {
  46                 return getBinding().type();
  47         }
  48
  49         @Override
  50         public float 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(float newValue) throws AccessorException {
  63                 if (newValue == getValue()) return;\r
  64                 writeLock();\r
  65                 try {
  66                         if (binding.isImmutable() && parent!=null && parent instanceof JavaArray) {\r
  67                                 JavaObject jo = (JavaObject) parent;\r
  68                                 ArrayBinding ab = (ArrayBinding) jo.binding;\r
  69                                 Object nv = getBinding().create(newValue);\r
  70                                 ab.set(jo.object, (Integer)keyInParent, nv);\r
  71                                 this.object = nv;\r
  72                         } else if (binding.isImmutable() && parent!=null && parent instanceof JavaRecord) {\r
  73                                 JavaObject jo = (JavaObject) parent;\r
  74                                 RecordBinding rb = (RecordBinding) jo.binding;\r
  75                                 Object nv = getBinding().create(newValue);\r
  76                                 rb.setComponent(jo.object, (Integer)keyInParent, nv);\r
  77                                 this.object = nv;\r
  78                         } else if (binding.isImmutable() && parent!=null && parent instanceof JavaVariant) {\r
  79                                 JavaObject jo = (JavaObject) parent;\r
  80                                 VariantBinding vb = (VariantBinding) jo.binding;\r
  81                                 Object nv = getBinding().create(newValue);\r
  82                                 vb.setContent(jo.object, getBinding(), nv);\r
  83                                 this.object = nv;\r
  84                         } else {                        \r
  85                                 // Set value\r
  86                                 getBinding().setValue(object, newValue);\r
  87                         }\r
  88 \r
  89
  90                         // Notify
  91                         ListenerEntry le = listeners;
  92                         while (le!=null) {
  93                                 FloatInterestSet is = le.getInterestSet();
  94                                 if (is.inNotifications()) {
  95                                         Event e = new ValueAssigned( Bindings.FLOAT, is.inValues() ? newValue : null );
  96                                         emitEvent(le, e);
  97                                 }
  98                                 le = le.next;
  99                         }
 100
 101                 } catch (BindingException e) {
 102                         throw new AccessorException(e);
 103                 } finally {\r
 104                         writeUnlock();\r
 105                 }
 106         }
 107
 108         @Override
 109         public void setValue(Binding binding, Object newValue) throws AccessorException {
 110                 try {
 111                         float nv = ((FloatBinding)binding).getValue_(newValue);
 112                         setValue(nv);
 113                 } catch (BindingException e) {
 114                         throw new AccessorException(e);
 115                 }
 116         }
 117
 118         @SuppressWarnings("unchecked")
 119         @Override
 120         public <T extends Accessor> T getComponent(ChildReference reference)
 121         throws AccessorConstructionException {
 122                 if (reference==null) return (T) this;
 123
 124                 throw new ReferenceException(reference.getClass()+" is not a subreference of BooleanType");
 125         }
 126
 127         @Override
 128         Event applyLocal(Event e, boolean makeRollback) throws AccessorException {
 129                 Event rollback = makeRollback ? new ValueAssigned( Bindings.FLOAT, getValue() ) : null;                 \r
 130                 if (e instanceof ValueAssigned) {\r
 131                         ValueAssigned va = (ValueAssigned) e;\r
 132                         if (va.newValue == null) throw new AccessorException("Float value expected, got null");                 \r
 133                         setValue(va.newValue.getBinding(), va.newValue.getValue());\r
 134                         return rollback;\r
 135                 } else {\r
 136                         throw new AccessorException("Cannot apply "+e.getClass().getName()+" to Float");                        \r
 137                 }
 138         }
 139
 140 }