Rule for SuspiciousEqualsMethodName

Hello, similar to the rule SuspiciousHashcodeMethodName I created one for equals (often used with wrong parameter type).

   <rule name="SuspiciousEqualsMethodName"
         message="The method name and parameter number are suspiciously close to equals(Object)"
         class="net.sourceforge.pmd.rules.XPathRule">
      <description>
      The method name and parameter number are suspiciously close to equals(Object), which
      may mean you are trying (and failing) to override the equals(Object) method.
      </description>
      <properties>
         <property name="xpath">
            <value>
<![CDATA[
//ClassDeclaration//MethodDeclarator
  [@Image = 'equals']
  [count(FormalParameters/*) = 1 ]
  [ not (FormalParameters//Type/Name
         [@Image = 'Object' or @Image = 'java.lang.Object'])
  ]
]]>
            </value>
         </property>
      </properties>
      <priority>2</priority>
      <example>
<![CDATA[
public class Foo {
public int equals(Object o) {
// oops, this probably was supposed to be boolean equals
}
public boolean equals(String s) {
// oops, this probably was supposed to be equals(Object)
}
}
]]>
      </example>
   </rule>