jaxp/src/com/sun/org/apache/xpath/internal/Arg.java

@@ -22,10 +22,11 @@
  */
 package com.sun.org.apache.xpath.internal;
 
 import com.sun.org.apache.xml.internal.utils.QName;
 import com.sun.org.apache.xpath.internal.objects.XObject;
+import java.util.Objects;
 
 /**
  * This class holds an instance of an argument on
  * the stack. The value of the argument can be either an
  * XObject or a String containing an expression.

@@ -180,11 +181,11 @@
    */
   public Arg()
   {
 
     m_qname = new QName("");
-    ;  // so that string compares can be done.
+       // so that string compares can be done.
     m_val = null;
     m_expression = null;
     m_isVisible = true;
     m_isFromWithParam = false;
   }

@@ -221,18 +222,24 @@
     m_isVisible = true;
     m_isFromWithParam = false;
     m_expression = null;
   }
 
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(this.m_qname);
+    }
+
   /**
    * Equality function specialized for the variable name.  If the argument
    * is not a qname, it will deligate to the super class.
    *
    * @param   obj   the reference object with which to compare.
    * @return  <code>true</code> if this object is the same as the obj
    *          argument; <code>false</code> otherwise.
    */
+  @Override
   public boolean equals(Object obj)
   {
     if(obj instanceof QName)
     {
       return m_qname.equals(obj);