bundles/org.simantics.databoard/src/org/simantics/databoard/binding/impl/ArrayListBinding.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.util.ArrayList;
  15 import java.util.Collection;
  16 import java.util.Iterator;
  17 import java.util.List;
  18
  19 import org.simantics.databoard.binding.ArrayBinding;
  20 import org.simantics.databoard.binding.Binding;
  21 import org.simantics.databoard.binding.error.BindingException;
  22 import org.simantics.databoard.type.ArrayType;
  23
  24 /**
  25  * CollectionListBinding binds ArrayType to java.util.List and
  26  * instantiates java.util.ArrayList.
  27  *
  28  * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
  29  */
  30 public class ArrayListBinding extends ArrayBinding {
  31
  32         public ArrayListBinding(Binding componentBinding) {
  33                 this(new ArrayType(componentBinding.type()), componentBinding);
  34         }
  35
  36         public ArrayListBinding(ArrayType type, Binding componentBinding) {
  37                 super(type, componentBinding);
  38                 if (type==null) throw new IllegalArgumentException("null arg");
  39                 this.type = type;
  40         }
  41
  42         @Override
  43         public Object create() {
  44                 return new ArrayList<Object>();
  45         }
  46
  47         @Override
  48         public Object create(Collection<Object> collection) throws BindingException {
  49                 return new ArrayList<Object>( collection );
  50         }
  51
  52         /**
  53          * Create new ArrayList
  54          */
  55         @Override
  56         public Object create(int length, Iterator<Object> values) {
  57                 ArrayList<Object> array = new ArrayList<Object>(length);
  58                 while (values.hasNext())
  59                         array.add(values.next());
  60                 return array;
  61         }
  62
  63         public Object create(Object[] values) {
  64                 ArrayList<Object> array = new ArrayList<Object>(values.length);
  65                 for (int i=0; i<values.length; i++)
  66                         array.add(values[i]);
  67                 return array;
  68         }
  69
  70
  71         @SuppressWarnings("unchecked")
  72         @Override
  73         public Object get(Object array, int index) throws BindingException {
  74                 if (!isInstance(array)) throw new BindingException("Unexpected class "+array.getClass().getSimpleName()+", java.util.List expected");
  75                 List<Object> list = (List<Object>) array;
  76                 return list.get(index);
  77         }
  78
  79         @SuppressWarnings("unchecked")
  80     @Override
  81         public void getAll(Object array, Object[] result) throws BindingException {
  82                 List<Object> list = (List<Object>) array;
  83                 for (int i=0; i<list.size(); i++)
  84                         result[i] = list.get(i);
  85         }
  86
  87         @SuppressWarnings("unchecked")
  88     @Override
  89         public void set(Object array, int index, Object value)
  90                         throws BindingException {
  91                 List<Object> list = (List<Object>) array;
  92                 list.set(index, value);
  93         }
  94
  95         @SuppressWarnings("unchecked")
  96     @Override
  97         public void add(Object array, int index, Object element)
  98                         throws BindingException, IndexOutOfBoundsException {
  99                 List<Object> list = (List<Object>) array;
 100                 list.add(index, element);
 101         }
 102
 103         @SuppressWarnings("unchecked")
 104         @Override
 105         public void remove(Object array, int index, int count) throws BindingException {
 106                 List<Object> list = (List<Object>) array;
 107                 for (int i=0; i<count; i++)
 108                         list.remove(index);
 109         }
 110
 111         @SuppressWarnings("unchecked")
 112         @Override
 113         public int size(Object array) throws BindingException {
 114                 if (!isInstance(array)) throw new BindingException("Unexpected class "+array.getClass().getSimpleName()+", java.util.List expected");
 115                 List<Object> list = (List<Object>) array;
 116                 return list.size();
 117         }
 118
 119         @Override
 120         public boolean isInstance(Object obj) {
 121                 return obj instanceof List<?>;
 122         }
 123
 124         @Override
 125         public void setSize(Object array, int newSize) throws BindingException {
 126                 @SuppressWarnings("unchecked")
 127                 List<Object> list = (List<Object>) array;
 128                 int oldSize = list.size();
 129                 if (oldSize==newSize) return;
 130
 131                 if (oldSize>newSize) {
 132                         for (int i=oldSize-1; i>=newSize; i--)
 133                                 list.remove(i);
 134                         return;
 135                 }
 136
 137                 int c = newSize - oldSize;
 138                 for (int i=0; i<c; i++) {
 139                         list.add( componentBinding.createDefault() );
 140                 }
 141         }
 142
 143         @Override
 144         public boolean isImmutable() {
 145                 return false;
 146         }
 147
 148         @Override
 149         public boolean isResizable() {
 150                 return true;
 151         }
 152
 153 }
 154