http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.7. 

package org.bouncycastle.i18n.filter;

public interface Filter
{

    
Runs the filter on the input String and returns the filtered String

Params:
  • input – input String
Returns:filtered String
/**
     * Runs the filter on the input String and returns the filtered String
     * @param input input String
     * @return filtered String
     */
    public String doFilter(String input);
    
    
Runs the filter on the input url and returns the filtered String

Params:
  • input – input url String
Returns:filtered String
/**
     * Runs the filter on the input url and returns the filtered String
     * @param input input url String
     * @return filtered String
     */
    public String doFilterUrl(String input);

}