How can I pass arguments to an extension point constructor/ createExecutableExtension with parameters in eclipse

Please also refer to my previous post.
http://exploreeclipse.blogspot.in/2015/09/reading-extension-point-from-eclipse.html

public void readExtensionPoint(String myjsonString) {

IExtensionRegistry registry = Platform.getExtensionRegistry();

IConfigurationElement[] elements = registry.getConfigurationElementsFor("com.kk.myplugin", "services");

for (IConfigurationElement iConfigurationElement : elements)

{

iConfigurationElement.getAttribute("service_id");

iConfigurationElement.getAttribute("name");

try

{

try

{

String attribute = iConfigurationElement.getAttribute("class");

String contributorName = iConfigurationElement.getDeclaringExtension().getContributor().getName();

Class<?> javaClass = Platform.getBundle(contributorName).loadClass(attribute);

Constructor<?> ctor = javaClass.getDeclaredConstructor(String.class);

IService service = (IService) ctor.newInstance(myjsonString);

return service;

}

catch (Exception e)

{

}

}

catch (CoreException e)

{

e.printStackTrace();

}

}

}

Reading an extension point from eclipse plugin

public void readExtensionPoint() {

IExtensionRegistry registry = Platform.getExtensionRegistry();

IConfigurationElement[] elements = registry.getConfigurationElementsFor("com.kk.core", "platformServices");

for (IConfigurationElement iConfigurationElement : elements)

{

iConfigurationElement.getAttribute("id");

try

{

//This is your class

Object createExecutableExtension = iConfigurationElement.createExecutableExtension("class");

}

catch (CoreException e)

{

e.printStackTrace();

}

}

}

Here is my extension point schema definition:

<?xml version='1.0' encoding='UTF-8'?>

<!-- Schema file written by PDE -->

<schema targetNamespace="com.kk.core" xmlns="http://www.w3.org/2001/XMLSchema">

<annotation>

      <appinfo>

         <meta.schema plugin="com.kk.core" id="platformServices" name="platformServices"/>

      </appinfo>

      <documentation>

         [Enter description of this extension point.]

      </documentation>

   </annotation>

   <element name="extension">

      <annotation>

         <appinfo>

            <meta.element />

         </appinfo>

      </annotation>

      <complexType>

         <sequence minOccurs="1" maxOccurs="unbounded">

            <element ref="service"/>

         </sequence>

         <attribute name="point" type="string" use="required">

            <annotation>

               <documentation>

                  

               </documentation>

            </annotation>

         </attribute>

         <attribute name="id" type="string">

            <annotation>

               <documentation>

                  

               </documentation>

            </annotation>

         </attribute>

         <attribute name="name" type="string">

            <annotation>

               <documentation>

                  

               </documentation>

               <appinfo>

                  <meta.attribute translatable="true"/>

               </appinfo>

            </annotation>

         </attribute>

      </complexType>

   </element>

   <element name="service">

      <complexType>

         <attribute name="id" type="string" use="required">

            <annotation>

               <documentation>

                  

               </documentation>

            </annotation>

         </attribute>

         <attribute name="class" type="string" use="required">

            <annotation>

               <documentation>

                  

               </documentation>

               <appinfo>

                  <meta.attribute kind="java" basedOn="com.kk.core.services.Service:com.kk.core.services.IService"/>

               </appinfo>

            </annotation>

         </attribute>

      </complexType>

   </element>

   <annotation>

      <appinfo>

         <meta.section type="since"/>

      </appinfo>

      <documentation>

         [Enter the first release in which this extension point appears.]

      </documentation>

   </annotation>

   <annotation>

      <appinfo>

         <meta.section type="examples"/>

      </appinfo>

      <documentation>

         [Enter extension point usage example here.]

      </documentation>

   </annotation>

   <annotation>

      <appinfo>

         <meta.section type="apiinfo"/>

      </appinfo>

      <documentation>

         [Enter API information here.]

      </documentation>

   </annotation>

   <annotation>

      <appinfo>

         <meta.section type="implementation"/>

      </appinfo>

      <documentation>

         [Enter information about supplied implementation of this extension point.]

      </documentation>

   </annotation>

</schema>

Extension:

   <extension

         id="com.kk.core.platform.services"

         name="KK Platform Services"

         point="com.core.platformServices">

      <service

            class="com.kk.core.services.CheckService"

            id="xx34567vvk">

      </service>

     

   </extension>