Reuse String.isEmpty()

Author: garydgregory

src/main/java/org/apache/commons/jxpath/ri/NamespaceResolver.java

@@ -48,7 +48,7 @@ protected static String getPrefix(final NodePointer pointer, final String namesp
                 final String uri = nsPointer.getNamespaceURI();
                 if (uri.equals(namespaceURI)) {
                     final String prefix = nsPointer.getName().getName();
-                    if (!"".equals(prefix)) {
+                    if (!prefix.isEmpty()) {
                         return prefix;
                     }
                 }

src/main/java/org/apache/commons/jxpath/ri/model/dom/DOMNodePointer.java

@@ -36,6 +36,7 @@
 import org.apache.commons.jxpath.ri.model.NodePointer;
 import org.apache.commons.jxpath.ri.model.beans.NullPointer;
 import org.apache.commons.jxpath.util.TypeUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.w3c.dom.Attr;
 import org.w3c.dom.Comment;
 import org.w3c.dom.Document;
@@ -136,7 +137,7 @@ public static String getNamespaceURI(Node node) {
                 aNode = aNode.getParentNode();
             }
         }
-        return "".equals(uri) ? null : uri;
+        return StringUtils.isEmpty(uri) ? null : uri;
     }
 
     /**

src/main/java/org/apache/commons/jxpath/ri/model/jdom/JDOMNodePointer.java

@@ -117,7 +117,7 @@ private static String getNamespaceURI(final Object node) {
         if (node instanceof Element) {
             final Element element = (Element) node;
             String ns = element.getNamespaceURI();
-            if ("".equals(ns)) {
+            if (ns.isEmpty()) {
                 ns = null;
             }
             return ns;