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

   1 /*******************************************************************************
   2  *  Copyright (c) 2010 Association for Decentralized Information Management in
   3  *  Industry THTH ry.
   4  *  All rights reserved. This program and the accompanying materials
   5  *  are made available under the terms of the Eclipse Public License v1.0
   6  *  which accompanies this distribution, and is available at
   7  *  http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  *  Contributors:
  10  *      VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.databoard.accessor.java;
  13
  14 import org.simantics.databoard.Bindings;
  15 import org.simantics.databoard.accessor.Accessor;
  16 import org.simantics.databoard.accessor.LongAccessor;
  17 import org.simantics.databoard.accessor.error.AccessorConstructionException;
  18 import org.simantics.databoard.accessor.error.AccessorException;
  19 import org.simantics.databoard.accessor.error.ReferenceException;
  20 import org.simantics.databoard.accessor.event.Event;
  21 import org.simantics.databoard.accessor.event.ValueAssigned;
  22 import org.simantics.databoard.accessor.impl.AccessorParams;
  23 import org.simantics.databoard.accessor.impl.ListenerEntry;
  24 import org.simantics.databoard.accessor.interestset.LongInterestSet;
  25 import org.simantics.databoard.accessor.reference.ChildReference;
  26 import org.simantics.databoard.binding.ArrayBinding;
  27 import org.simantics.databoard.binding.Binding;
  28 import org.simantics.databoard.binding.LongBinding;
  29 import org.simantics.databoard.binding.RecordBinding;
  30 import org.simantics.databoard.binding.VariantBinding;
  31 import org.simantics.databoard.binding.error.BindingException;
  32 import org.simantics.databoard.binding.mutable.ContainerOptionalBinding;
  33 import org.simantics.databoard.type.LongType;
  34
  35 public class JavaLong extends JavaObject implements LongAccessor {
  36
  37         public JavaLong(Accessor parent, LongBinding binding, Object object, AccessorParams params) {
  38                 super(parent, binding, object, params);
  39         }
  40
  41         public LongBinding getBinding() {
  42                 return (LongBinding) binding;
  43         }
  44
  45         @Override
  46         public LongType type() {
  47                 return getBinding().type();
  48         }
  49
  50         @Override
  51         public long getValue() throws AccessorException {
  52                 readLock();
  53                 try {
  54                         return getBinding().getValue_(object);
  55                 } catch (BindingException e) {
  56                         throw new AccessorException(e);
  57                 } finally {
  58                         readUnlock();
  59                 }
  60         }
  61
  62         @Override
  63         public void setValue(long newValue) throws AccessorException {
  64                 if (newValue == getValue()) return;
  65                 writeLock();
  66                 try {
  67                         if (binding.isImmutable() && parent!=null && parent instanceof JavaArray) {
  68                                 JavaObject jo = (JavaObject) parent;
  69                                 ArrayBinding ab = (ArrayBinding) jo.binding;
  70                                 Object nv = getBinding().create(newValue);
  71                                 ab.set(jo.object, (Integer)keyInParent, nv);
  72                                 this.object = nv;
  73                         } else if (binding.isImmutable() && parent!=null && parent instanceof JavaRecord) {
  74                                 JavaObject jo = (JavaObject) parent;
  75                                 RecordBinding rb = (RecordBinding) jo.binding;
  76                                 Object nv = getBinding().create(newValue);
  77                                 rb.setComponent(jo.object, (Integer)keyInParent, nv);
  78                                 this.object = nv;
  79                         } else if (binding.isImmutable() && parent!=null && parent instanceof JavaVariant) {
  80                                 JavaObject jo = (JavaObject) parent;
  81                                 VariantBinding vb = (VariantBinding) jo.binding;
  82                                 Object nv = getBinding().create(newValue);
  83                                 vb.setContent(jo.object, getBinding(), nv);
  84                                 this.object = nv;
  85                         } else if (binding.isImmutable() && parent!=null && parent instanceof JavaOptional) {
  86                                 // Plain assign
  87                                 JavaOptional jo = (JavaOptional) parent;
  88                                 ContainerOptionalBinding vb = (ContainerOptionalBinding) jo.binding;
  89                                 vb.setValue(jo.object, newValue);
  90                                 this.object = newValue;
  91                         } else {
  92                                 // Set value
  93                                 getBinding().setValue(object, newValue);
  94                         }
  95
  96
  97                         // Notify
  98                         ListenerEntry le = listeners;
  99                         while (le!=null) {
 100                                 LongInterestSet is = le.getInterestSet();
 101                                 if (is.inNotifications()) {
 102                                         Event e = new ValueAssigned( Bindings.LONG, is.inValues() ? newValue : null );
 103                                         emitEvent(le, e);
 104                                 }
 105                                 le = le.next;
 106                         }
 107
 108                 } catch (BindingException e) {
 109                         throw new AccessorException(e);
 110                 } finally {
 111                         writeUnlock();
 112                 }
 113         }
 114
 115         @Override
 116         public void setValue(Binding binding, Object newValue) throws AccessorException {
 117                 try {
 118                         long nv = ((LongBinding)binding).getValue_(newValue);
 119                         setValue(nv);
 120                 } catch (BindingException e) {
 121                         throw new AccessorException(e);
 122                 }
 123         }
 124
 125         @SuppressWarnings("unchecked")
 126         @Override
 127         public <T extends Accessor> T getComponent(ChildReference reference)
 128         throws AccessorConstructionException {
 129                 if (reference==null) return (T) this;
 130                 throw new ReferenceException(reference.getClass()+" is not a subreference of LongType");
 131         }
 132
 133         @Override
 134         Event applyLocal(Event e, boolean makeRollback) throws AccessorException {
 135                 Event rollback = makeRollback ? new ValueAssigned( Bindings.LONG, getValue() ) : null;
 136                 if (e instanceof ValueAssigned) {
 137                         ValueAssigned va = (ValueAssigned) e;
 138                         if (va.newValue == null) throw new AccessorException("Long value expected, got null");
 139                         setValue(va.newValue.getBinding(), va.newValue.getValue());
 140                         return rollback;
 141                 } else {
 142                         throw new AccessorException("Cannot apply "+e.getClass().getName()+" to Long");
 143                 }
 144         }
 145
 146
 147 }
 148