Implemented asBigInteger and asBigDecimal in converters

Author: awalter17

src/main/java/org/scijava/convert/NumberToBigDecimalConverter.java

@@ -32,7 +32,8 @@
 package org.scijava.convert;
 
 import java.math.BigDecimal;
-import java.math.BigInteger;
+
+import org.scijava.util.NumberUtils;
 
 /**
  * Converts numbers to BigDecimals.
@@ -43,15 +44,7 @@ public abstract class NumberToBigDecimalConverter<N extends Number> extends Numb
 
 	@Override
 	public BigDecimal convert(Number n) {
-		// cannot get doubleValue of a BigInteger
-		if(BigInteger.class.isInstance(n)){
-			return new BigDecimal((BigInteger) n);
-		}
-		// Using .doubleValue on a long would cause loss of accuracy
-		else if(Long.class.isInstance(n)){
-			return new BigDecimal(n.longValue());
-		}
-		return new BigDecimal(n.doubleValue());
+		return NumberUtils.asBigDecimal(n);
 	}
 
 	@Override

src/main/java/org/scijava/convert/NumberToBigIntegerConverter.java

@@ -8,13 +8,13 @@
  * %%
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
- * 
+ *
  * 1. Redistributions of source code must retain the above copyright notice,
  *    this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -33,21 +33,25 @@
 
 import java.math.BigInteger;
 
+import org.scijava.util.NumberUtils;
+
 /**
  * Converts numbers to BigIntegers.
  *
  * @author Alison Walter
  */
-public abstract class NumberToBigIntegerConverter<N extends Number> extends NumberToNumberConverter<N, BigInteger> {
+public abstract class NumberToBigIntegerConverter<N extends Number> extends
+	NumberToNumberConverter<N, BigInteger>
+{
 
 	@Override
-	public BigInteger convert(Number n) {
-		return BigInteger.valueOf(n.longValue());
+	public BigInteger convert(final Number n) {
+		return NumberUtils.asBigInteger(n);
 	}
 
 	@Override
 	public Class<BigInteger> getOutputType() {
 		return BigInteger.class;
 	}
 
-}
+}