Merge pull request #584 from Alanscut/redundant_if

imporve redundant if statement

json-path/src/main/java/com/jayway/jsonpath/internal/Utils.java

@@ -379,10 +379,7 @@ public final class Utils {
      * @throws IllegalArgumentException if the character sequence is empty
      */
     public static <T extends CharSequence> T notEmpty(T chars, String message, Object... values) {
-        if (chars == null) {
+        if (chars == null || chars.length() == 0) {
-            throw new IllegalArgumentException(String.format(message, values));
-        }
-        if (chars.length() == 0) {
             throw new IllegalArgumentException(String.format(message, values));
         }
         return chars;

json-path/src/main/java/com/jayway/jsonpath/spi/json/JacksonJsonNodeJsonProvider.java

@@ -101,8 +101,8 @@ public class JacksonJsonNodeJsonProvider extends AbstractJsonProvider {
                 return e.asInt();
             } else if (e.isLong()) {
                 return e.asLong();
-            } else if (e.isBigDecimal()) {
+            } else if (e.isBigInteger()) {
-                return e.decimalValue();
+                return e.bigIntegerValue();
             } else if (e.isDouble()) {
                 return e.doubleValue();
             } else if (e.isFloat()) {