bundles/org.simantics.databoard/src/org/simantics/databoard/binding/BooleanBinding.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.binding;
  13
  14 import java.util.IdentityHashMap;
  15 import java.util.Set;
  16
  17 import org.simantics.databoard.accessor.reference.ChildReference;
  18 import org.simantics.databoard.binding.error.BindingException;
  19 import org.simantics.databoard.binding.error.RuntimeBindingException;
  20 import org.simantics.databoard.binding.impl.BindingPrintContext;
  21 import org.simantics.databoard.binding.impl.BooleanBindingDefault;
  22 import org.simantics.databoard.binding.mutable.MutableBooleanBinding;
  23 import org.simantics.databoard.type.BooleanType;
  24 import org.simantics.databoard.util.IdentityPair;
  25
  26 /**
  27  * This is a binding of Boolean Type and a Java Object.
  28  *
  29  * @see BooleanBindingDefault
  30  * @see MutableBooleanBinding
  31  * @see BooleanType
  32  * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
  33  */
  34 public abstract class BooleanBinding extends Binding {
  35
  36         public BooleanBinding(BooleanType type) {
  37                 this.type = type;
  38         }
  39
  40         public abstract Object create(boolean value) throws BindingException;
  41         public abstract Object create(Boolean value) throws BindingException;
  42         public abstract void setValue(Object obj, Boolean newValue) throws BindingException;
  43         public abstract void setValue(Object obj, boolean newValue)     throws BindingException;
  44         public abstract Boolean getValue(Object o) throws BindingException;
  45         public abstract boolean getValue_(Object o) throws BindingException;
  46
  47         public Object createUnchecked(Boolean value) throws RuntimeBindingException {
  48                 try {
  49                         return create(value);
  50                 } catch (BindingException e) {
  51                         throw new RuntimeBindingException(e);
  52                 }
  53         }
  54
  55         @Override
  56         public void readFrom(Binding srcBinding, Object src, Object dst)
  57                         throws BindingException {
  58                 boolean v = ((BooleanBinding)srcBinding).getValue_(src);
  59                 setValue(dst, v);
  60         }
  61
  62         @Override
  63         public BooleanType type() {
  64                 return (BooleanType) super.type();
  65         }
  66
  67         @Override
  68     public void accept(Visitor1 v, Object obj) {
  69         v.visit(this, obj);
  70     }
  71
  72         @Override
  73     public <T> T accept(Visitor<T> v) {
  74         return v.visit(this);
  75     }
  76
  77     @Override
  78     public void assertInstaceIsValid(Object obj, Set<Object> validInstances) throws BindingException {
  79                 if (!isInstance(obj)) throw new BindingException("Not a boolean instance");
  80     }
  81
  82     @Override
  83     public int deepHashValue(Object value, IdentityHashMap<Object, Object> hashedObjects) throws BindingException {
  84         boolean b = getValue_(value);
  85         return b ? 1231 : 1237;
  86     }
  87
  88     @Override
  89     public int deepCompare(Object o1, Object o2,
  90                 Set<IdentityPair<Object, Object>> compareHistory)
  91                 throws BindingException {
  92
  93         boolean v1 = getValue_(o1);
  94         boolean v2 = getValue_(o2);
  95         return (v2 == v1 ? 0 : (v1 ? 1 : -1));
  96     }
  97
  98     @Override
  99         protected void toString(Object value, BindingPrintContext ctx) throws BindingException {
 100         ctx.b.append(getValue_(value));
 101     }
 102
 103         @Override
 104         public Binding getComponentBinding(ChildReference path) {
 105                 if (path==null) return this;
 106                 throw new IllegalArgumentException();
 107         }
 108
 109         @Override
 110         public int getComponentCount() {
 111                 return 0;
 112         }
 113
 114         @Override
 115         public Binding getComponentBinding(int index) {
 116                 throw new IllegalArgumentException();
 117         }
 118 }