bundles/org.simantics.databoard/src/org/simantics/databoard/accessor/java/JavaBoolean.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.BooleanAccessor;
  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.BooleanInterestSet;
  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.BooleanBinding;
  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.type.BooleanType;
  33
  34 /**
  35  * Accessor to a Java Object of Boolean Type.
  36  *
  37  * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
  38  */
  39 public class JavaBoolean extends JavaObject implements BooleanAccessor {
  40
  41         public JavaBoolean(Accessor parent, BooleanBinding binding, Object object, AccessorParams params) {
  42                 super(parent, binding, object, params);
  43         }
  44
  45         public BooleanBinding getBinding() {
  46                 return (BooleanBinding) binding;
  47         }
  48
  49         @Override
  50         public BooleanType type() {
  51                 return getBinding().type();
  52         }
  53
  54         @Override
  55         public boolean getValue() throws AccessorException {
  56                 readLock();
  57                 try {
  58                         return getBinding().getValue_(object);
  59                 } catch (BindingException e) {
  60                         throw new AccessorException(e);
  61                 } finally {
  62                         readLock();
  63                 }
  64         }
  65
  66         @Override
  67         public void setValue(boolean newValue) throws AccessorException {
  68                 if (newValue == getValue()) return;
  69                 writeLock();
  70                 try {
  71                         if (binding.isImmutable() && parent!=null && parent instanceof JavaArray) {
  72                                 JavaObject jo = (JavaObject) parent;
  73                                 ArrayBinding ab = (ArrayBinding) jo.binding;
  74                                 Object nv = getBinding().create(newValue);
  75                                 ab.set(jo.object, (Integer)keyInParent, nv);
  76                                 this.object = nv;
  77                         } else if (binding.isImmutable() && parent!=null && parent instanceof JavaRecord) {
  78                                 JavaObject jo = (JavaObject) parent;
  79                                 RecordBinding rb = (RecordBinding) jo.binding;
  80                                 Object nv = getBinding().create(newValue);
  81                                 rb.setComponent(jo.object, (Integer)keyInParent, nv);
  82                                 this.object = nv;
  83                         } else if (binding.isImmutable() && parent!=null && parent instanceof JavaVariant) {
  84                                 JavaObject jo = (JavaObject) parent;
  85                                 VariantBinding vb = (VariantBinding) ((JavaVariant)parent).binding;
  86                                 Object nv = getBinding().create(newValue);
  87                                 vb.setContent(jo.object, getBinding(), nv);
  88                                 this.object = nv;
  89                         } else {
  90                                 // Set value
  91                                 getBinding().setValue(object, newValue);
  92                         }
  93
  94                         // Notify
  95                         ListenerEntry le = listeners;
  96                         while (le!=null) {
  97                                 BooleanInterestSet is = le.getInterestSet();
  98                                 if (is.inNotifications()) {
  99                                         Event e = new ValueAssigned( Bindings.BOOLEAN, is.inValues() ? newValue : null );
 100                                         emitEvent(le, e);
 101                                 }
 102                                 le = le.next;
 103                         }
 104
 105                 } catch (BindingException e) {
 106                         throw new AccessorException(e);
 107                 } finally {
 108                         writeUnlock();
 109                 }
 110         }
 111
 112         @Override
 113         public void setValue(Binding binding, Object newValue) throws AccessorException {
 114                 try {
 115                         boolean nv = ((BooleanBinding)binding).getValue_(newValue);
 116                         setValue(nv);
 117                 } catch (BindingException e) {
 118                         throw new AccessorException(e);
 119                 }
 120         }
 121
 122         @SuppressWarnings("unchecked")
 123         public <T extends Accessor> T getComponent(ChildReference reference)
 124         throws AccessorConstructionException {
 125                 if (reference==null) return (T) this;
 126                 throw new ReferenceException(reference.getClass()+" is not a subreference of BooleanType");
 127         }
 128
 129         @Override
 130         Event applyLocal(Event e, boolean makeRollback) throws AccessorException {
 131                 Event rollback = null;
 132                 rollback = makeRollback ? new ValueAssigned( Bindings.BOOLEAN, getValue() ) : null;
 133                 if (e instanceof ValueAssigned) {
 134                         ValueAssigned va = (ValueAssigned) e;
 135                         if (va.newValue == null) throw new AccessorException("Boolean value expected, got null");
 136                         setValue(va.newValue.getBinding(), va.newValue.getValue());
 137                         return rollback;
 138                 } else throw new AccessorException("Cannot apply "+e.getClass().getName()+" to Boolean");
 139         }
 140
 141
 142 }
 143