bundles/org.simantics.db.impl/src/org/simantics/db/impl/graph/RandomAccessSubList.java

   1 package org.simantics.db.impl.graph;
   2
   3 import java.util.AbstractList;
   4 import java.util.List;
   5
   6 public class RandomAccessSubList<T> extends AbstractList<T> {
   7     private final List<T> baseList;
   8     private final int fromIndex;
   9     private final int length;
  10
  11     public RandomAccessSubList(List<T> baseList, int fromIndex, int length) {
  12         this.baseList = baseList;
  13         this.fromIndex = fromIndex;
  14         this.length = length;
  15     }
  16
  17     @Override
  18     public T get(int index) {
  19         if(index < 0 || index > length)
  20             throw new IndexOutOfBoundsException();
  21         return baseList.get(index+fromIndex);
  22     }
  23
  24     @Override
  25     public int size() {
  26         return length;
  27     }
  28 }