bundles/org.simantics.databoard/src/org/simantics/databoard/binding/impl/DoubleArrayBinding.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.impl;
  13
  14 import java.lang.reflect.Array;
  15 import java.util.IdentityHashMap;
  16 import java.util.Iterator;
  17 import java.util.Set;
  18
  19 import org.simantics.databoard.binding.ArrayBinding;
  20 import org.simantics.databoard.binding.Binding;
  21 import org.simantics.databoard.binding.DoubleBinding;
  22 import org.simantics.databoard.binding.error.BindingException;
  23 import org.simantics.databoard.binding.error.UnsupportedOperationException;
  24 import org.simantics.databoard.type.ArrayType;
  25 import org.simantics.databoard.type.DoubleType;
  26 import org.simantics.databoard.type.NumberType;
  27 import org.simantics.databoard.util.IdentityPair;
  28
  29 /**
  30  * Binds Double[] type to double[] Class.
  31  */
  32 public final class DoubleArrayBinding extends ArrayBinding {
  33
  34         public static DoubleArrayBinding createFrom(ArrayType type) {
  35                 return new DoubleArrayBinding(type, new DoubleBindingDefault((DoubleType) type.componentType));
  36         }
  37
  38         public DoubleArrayBinding(ArrayType type, Binding componentBinding) {
  39                 super(type, componentBinding);
  40         }
  41
  42         @Override
  43         public Object create() {
  44                 return new double[0];
  45         }
  46
  47         @Override
  48         public Object create(int length, Iterator<Object> values) {
  49                 double[] array = new double[length];
  50                 for(int i=0;i<length;++i)
  51                         array[i] = (Double)values.next();
  52                 return array;
  53         }
  54
  55         public Object create(Object[] values) {
  56                 double[] result = new double[values.length];
  57                 for (int i=0; i<values.length; i++)
  58                         result[i] = (Double) values[i];
  59                 return result;
  60         }
  61
  62         @Override
  63     public Object createDefault()
  64     throws BindingException
  65     {
  66                 NumberType nt = (NumberType) type().componentType;
  67                 if (nt.getRange() == null) {
  68                 return new double[ type().minLength() ];
  69                 }
  70                 return super.createDefault();
  71     }
  72
  73         @Override
  74         public void readFrom(Binding srcBinding, Object src, Object dst)
  75                         throws BindingException {
  76                 // Src Binding
  77                 ArrayBinding sb = (ArrayBinding) srcBinding;
  78                 // Src Component Binding
  79                 DoubleBinding scb = (DoubleBinding) sb.getComponentBinding();
  80
  81                 double[] d = (double[]) dst;
  82                 if (d.length != sb.size(src)) throw new BindingException("double[] is length immutable");
  83
  84                 for (int i=0; i<d.length; i++) {
  85                         d[i] = scb.getValue_( sb.get(src, i) );
  86                 }
  87         }
  88
  89         @Override
  90         public Object readFromTry(Binding srcBinding, Object src, Object dst) throws BindingException {
  91                 // Src Binding
  92                 ArrayBinding sb = (ArrayBinding) srcBinding;
  93                 // Src Component Binding
  94                 DoubleBinding scb = (DoubleBinding) sb.getComponentBinding();
  95
  96                 double[] d = (double[]) dst;
  97                 int srcSize = sb.size(src);
  98                 if (d.length != srcSize) d = new double[ srcSize ];
  99
 100                 for (int i=0; i<d.length; i++) {
 101                         d[i] = scb.getValue_( sb.get(src, i) );
 102                 }
 103
 104                 return d;
 105         }
 106
 107         /**
 108          * Create an array object.
 109          * Note! The argument is consumed (is used in the result).
 110          *
 111          * @param array
 112          * @return an object that contains the array
 113          */
 114         public Object create(double[] array) {
 115                 return array;
 116         }
 117
 118         @Override
 119         public Object get(Object array, int index) throws BindingException {
 120                 if (!isInstance(array)) throw new BindingException("Unexpected class "+array.getClass().getSimpleName()+", double[] expected");
 121                 return ((double[])array)[index];
 122         }
 123
 124         @Override
 125         public void getAll(Object array, Object[] result) throws BindingException {
 126                 double[] a = (double[])array;
 127                 for (int i=0; i<a.length; i++)
 128                         result[i] = a[i];
 129         }
 130
 131         @Override
 132         public void set(Object array, int index, Object value)
 133                         throws BindingException {
 134                 double[] a = (double[])array;
 135                 a[index] = (Double) value;
 136         }
 137
 138         @Override
 139         public int size(Object array) throws BindingException {
 140                 if (!isInstance(array)) throw new BindingException("Unexpected class "+array.getClass().getSimpleName()+", double[] expected");
 141                 return ((double[])array).length;
 142         }
 143
 144         @Override
 145         public boolean isInstance(Object obj) {
 146                 return obj instanceof double[];
 147         }
 148
 149         @Override
 150         public boolean isImmutable() {
 151                 return false;
 152         }
 153
 154         public double[] getArray(Object array) throws BindingException {
 155                 if (!isInstance(array)) throw new BindingException("Unexpected class "+array.getClass().getSimpleName()+", double[] expected");
 156                 return (double[]) array;
 157         }
 158
 159     @Override
 160     public int deepHashValue(Object value, IdentityHashMap<Object, Object> hashedObjects) throws BindingException {
 161         int result = 1;
 162         double[] array = (double[]) value;
 163         for (int i=0; i<array.length; i++) {
 164                 double element = array[i];
 165                 long bits = Double.doubleToLongBits(element);
 166                 int elementHash = (int)(bits ^ (bits >>> 32));
 167                 result = 31*result + elementHash;
 168         }
 169         return result;
 170     }
 171
 172     @Override
 173     public int deepCompare(Object o1, Object o2,
 174                 Set<IdentityPair<Object, Object>> compareHistory)
 175                 throws BindingException {
 176         double[] a1 = (double[]) o1;
 177         double[] a2 = (double[]) o2;
 178                 // Compare Lengths
 179                 int l1 = a1.length;
 180                 int l2 = a2.length;
 181                 int dif = l1 - l2;
 182                 if (dif!=0) return dif;
 183                 // Compare elements
 184                 for (int i=0; i<l1; i++) {
 185                         double v1 = a1[i];
 186                         double v2 = a2[i];
 187                         dif = Double.compare(v1, v2);
 188                         if (dif!=0) return dif;
 189                 }
 190                 return 0;
 191     }
 192
 193     @Override
 194     public void add(Object array, int index, Object element)
 195                 throws BindingException, IndexOutOfBoundsException {
 196         throw new UnsupportedOperationException();
 197     }
 198
 199         @Override
 200         public void remove(Object array, int index, int count) throws BindingException {
 201         throw new UnsupportedOperationException();
 202         }
 203
 204         @Override
 205         public void setSize(Object array, int newSize) throws BindingException {
 206                 int oldSize = Array.getLength(array);
 207                 if (oldSize==newSize) return;
 208                 throw new BindingException("double[] is length immutable");
 209         }
 210
 211         @Override
 212         public boolean isResizable() {
 213                 return false;
 214         }
 215
 216 }