package edu.stanford.rt.credential;
/**
 * @author Ninghui Li, Sandra Qiu<br>
 *
 * This class handles <code>Principal</code> element which consists of
 * ds:KeyValue. Instead of storing the key vlaue, we store the 
 * hashValue of the key value. The key value is stored in 
 * <code>PublicKeyPrincipalInfo</code>.
 */
public class PublicKeyPrincipal extends Principal
{
	/**
	 * Hash value for the public key stored in this principal
	 */
	private String hashValue;
	/** Contructor of PublicKeyPrincipal */
	public PublicKeyPrincipal(String hashValue)
	{
		this.hashValue = hashValue;
	}
	/* (non-Javadoc)
	 * @see java.lang.Object#equals(Object)
	 */
	public boolean equals(Object principal)
	{
		if (!(principal instanceof PublicKeyPrincipal))
			return false;
		return this.hashCode() == principal.hashCode();
	}
	/* (non-Javadoc)
	 * @see java.lang.Object#hashCode()
	 */
	public int hashCode()
	{
		return hashValue.hashCode();
	}
    
	/* (non-Javadoc)
	 * @see edu.stanford.rt.credential.PrincipalExpression#toString(String)
	 */
    public String toString(String indent)
    {
        String thisIndent = indent + "  ";
        return thisIndent + "PublicKeyPrincipal: " + hashValue;
    }

    /** pretty printing for debugging */
    public String toString() { return hashValue; }
}