applicationform.java

Java p2p程序设计2002年版

package com.sams.jxta.groups.student;

import net.jxta.membership.Authenticator;
import net.jxta.membership.MembershipService;
import net.jxta.credential.AuthenticationCredential;

/*
 * An Application Form represents an Authenticator.
 * 
 */
public class ApplicationForm implements Authenticator{
    
    private String studentName;
    private float GPA;
    private UniversityAdmissionsService admissionsService;
    private AuthenticationCredential unsubscribedCredential;    

    /*
     * Constructor
     */
    public ApplicationForm(UniversityAdmissionsService admissionsService,
                           AuthenticationCredential unsubscribedCredential){
        this.admissionsService      = admissionsService;
        this.unsubscribedCredential = unsubscribedCredential;
    }
    
    /*
     * Returns a String representing the method Name
     */
     public String getMethodName(){
        return "ApplicationForm";
    }

    /*
     * Returns the Authentication Credential
     */
    public AuthenticationCredential getAuthenticationCredential(){
        return unsubscribedCredential;
    }
    
    /*
     * Returns the Source Membership Service
     */
    public MembershipService  getSourceService(){
     return admissionsService;
    }

    /*
     * This method checks if the Application Form is authenticated properly
     * Only if the form is "filled" properly , can the peer join the Membership
     * Service. Here we consider an Application Form as ready to join if 
     * the GPA is greater than 3.0 and a "non blank" name has been provided.
     * 
     */
    public boolean  isReadyForJoin(){
     if(studentName == null || studentName.trim().equals(""))
        return false;                    
     if(GPA >3.0f)
      return true;
     else
      return false;
    }

    /*
     * Setter for the GPA
     */
    public void setGPA(float GPA){
     this.GPA = GPA;
    }
    
    /*
     * Setter for the Student Name
     */
    public void setStudentName(String studentName){
        this.studentName=studentName;
    }
}