Add double[] and boolean[] versions of Util.expandArray

src/main/java/net/imglib2/util/Util.java

@@ -129,6 +129,32 @@ public static long[] getArrayFromValue( final long value, final int numDimension
 		return values;
 	}
 
+	/**
+	 * Expand or truncate the provided array of {@code values} to length {@code
+	 * newLength}.
+	 * <p>
+	 * If {@code values.length < newLength} then the last value is repeated.
+	 * That is, the remaining elements are filled with {@code
+	 * values[values.length - 1]}.
+	 * <p>
+	 * If {@code values.length == newLength} then {@code values} is returned,
+	 * otherwise a new array is created.
+	 *
+	 * @param values
+	 * 		values to copy
+	 * @param newLength
+	 * 		length of expanded array
+	 *
+	 * @return an array where {@code array.length == newLength} and {@code array[i] == values[Math.max(i, values.length)]}
+	 */
+	public static double[] expandArray( final double[] values, final int newLength )
+	{
+		final double[] expandedValues = ( values.length == newLength ) ? values : Arrays.copyOf( values, newLength );
+		if ( values.length < newLength )
+			Arrays.fill( expandedValues, values.length, newLength, values[ values.length - 1 ] );
+		return expandedValues;
+	}
+
 	/**
 	 * Expand or truncate the provided array of {@code values} to length {@code
 	 * newLength}.
@@ -181,6 +207,32 @@ public static int[] expandArray( final int[] values, final int newLength )
 		return expandedValues;
 	}
 
+	/**
+	 * Expand or truncate the provided array of {@code values} to length {@code
+	 * newLength}.
+	 * <p>
+	 * If {@code values.length < newLength} then the last value is repeated.
+	 * That is, the remaining elements are filled with {@code
+	 * values[values.length - 1]}.
+	 * <p>
+	 * If {@code values.length == newLength} then {@code values} is returned,
+	 * otherwise a new array is created.
+	 *
+	 * @param values
+	 * 		values to copy
+	 * @param newLength
+	 * 		length of expanded array
+	 *
+	 * @return an array where {@code array.length == newLength} and {@code array[i] == values[Math.max(i, values.length)]}
+	 */
+	public static boolean[] expandArray( final boolean[] values, final int newLength )
+	{
+		final boolean[] expandedValues = ( values.length == newLength ) ? values : Arrays.copyOf( values, newLength );
+		if ( values.length < newLength )
+			Arrays.fill( expandedValues, values.length, newLength, values[ values.length - 1 ] );
+		return expandedValues;
+	}
+
 	public static double distance( final RealLocalizable position1, final RealLocalizable position2 )
 	{
 		double dist = 0;