git.gag.com Git - debian/openrocket/blob - core/src/net/sf/openrocket/util/ArrayUtils.java

   1 package net.sf.openrocket.util;
   2
   3 import java.lang.reflect.Array;
   4
   5 public class ArrayUtils {
   6
   7         /**
   8          * Implementation of java.util.Arrays.copyOfRange
   9          *
  10          * Since Froyo does not include this function it must be implemented here.
  11          *
  12          * @param original
  13          * @param start
  14          * @param end
  15          * @return
  16          */
  17         public static <T> T[] copyOfRange( T[] original, int start, int end ) {
  18
  19                 if ( original == null ) {
  20                         throw new NullPointerException();
  21                 }
  22
  23                 if ( start < 0 || start > original.length ) {
  24                         throw new ArrayIndexOutOfBoundsException();
  25                 }
  26
  27                 if ( start > end ) {
  28                         throw new IllegalArgumentException();
  29                 }
  30
  31                 T[] result = (T[]) Array.newInstance( original.getClass().getComponentType(), end-start );
  32
  33                 int index = 0;
  34                 int stop = original.length < end ? original.length : end;
  35                 for ( int i = start; i < stop; i ++ ) {
  36                         if ( i < original.length ) {
  37                                 result[index] = original[i];
  38                         }
  39                         index++;
  40                 }
  41
  42                 return result;
  43
  44         }
  45
  46 }