Is it true that we cannot use Composite Primary key when we opt for EJB 1.1 & Weblogic 5.1 as the development platform. If it is possible would anyone help in providing some direction to achieve my goal in developing a system, my database system would be on SQL.

Murali Thantry

It is possible to have a composite key in weblogic 5.1

here is an example

package com.whatever.whatever

import java.io.Serializable;

public class CompositePK implements java.io.Serializable {

  public int firstID;
  public int secondID;

  public CompositePK(){}
  
  public CompositePK( int firstID, int secondID ){
    this.firstID = firstID;
    this.secondID = secondID;
  }

  public boolean equals(Object obj){
    if (obj == null || !(obj instanceof CompositePK))
      return false;
    else if ( (((CompositePK)obj).firstID == firstID) &&
              (((CompositePK)obj).secondID == secondID) )
     return true;
    else
      return false;
  }

  public int hashCode(){
    return toString().hashCode();
  }

  public String toString(){
    return firstID+""+secondID;
  }
}