simpleprincipal.java

本书以大量精简的实例介绍了Java安全性编程方面的概念和技术

import java.security.Principal;

public final class SimplePrincipal implements
  Principal {
    private final String name;

    public SimplePrincipal(String name) {
        if (name == null) {
            throw new IllegalArgumentException(
                            "Name cannot be null");
        }
        this.name = name;
    }
    public int hashCode() {
        return name.hashCode();
    }    
    public java.lang.String getName() {
        return name;
    }
    public java.lang.String toString() {
        return "SimplePrincipal: " + name;
    }
    public boolean equals(java.lang.Object obj) {
        if (obj == null) return false;
        if (!(obj instanceof SimplePrincipal))
                                     return false;
        SimplePrincipal other =
                            (SimplePrincipal) obj;
        return name.equals(other.getName());
    }
}