Sample Sorting Code

public int compare(Object object1,  Object object2)

{

    // Logic to get column values to compare from object1 and 
object2

     // Get sort info keys

    Map sortKeys = getSortKeys ( );

    // Get column key name defined to get column values from 
object1 and object2

    String columnKey = (String) sortKeys.get("columnKey");

    // Get column values from object1 and object2

    Map m1 = (Map)object1;

    Map m2 = (Map)object2;

    String columnValue1 = (String)m1.get(columnKey);

    String columnValue2 = (String)m2.get(columnKey);

    // Code to custom compare columnValue1 and 2 goes here.

    .

    .

    .

}