package org.aspectj.apache.bcel.verifier;

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/**
 * A VerificationResult is what a PassVerifier returns
 * after verifying.
 *
 * @version $Id: VerificationResult.java,v 1.2 2008/05/28 23:53:00 aclement Exp $
 * @author <A HREF="http://www.inf.fu-berlin.de/~ehaase"/>Enver Haase</A>
 *
 */
public class VerificationResult{

	/**
	 * Constant to indicate verification has not been tried yet.
	 * This happens if some earlier verification pass did not return VERIFIED_OK.
	 */
	public static final int VERIFIED_NOTYET = 0;
	/** Constant to indicate verification was passed. */
	public static final int VERIFIED_OK = 1;
	/** Constant to indicate verfication failed. */
	public static final int VERIFIED_REJECTED = 2;

	/**
	 * This string is the canonical message for verifications that have not been tried yet.
	 * This happens if some earlier verification pass did not return VERIFIED_OK.
	 */
	private static final String VERIFIED_NOTYET_MSG = "Not yet verified.";
	/** This string is the canonical message for passed verification passes. */
	private static final String VERIFIED_OK_MSG = "Passed verification.";

	/**
	 * Canonical VerificationResult for not-yet-tried verifications.
	 * This happens if some earlier verification pass did not return VERIFIED_OK.
	 */
	public static final VerificationResult VR_NOTYET = new VerificationResult(VERIFIED_NOTYET, VERIFIED_NOTYET_MSG);
	/** Canonical VerificationResult for passed verifications. */
	public static final VerificationResult VR_OK = new VerificationResult(VERIFIED_OK, VERIFIED_OK_MSG);

	/** The numeric status. */
	private int numeric;

	/** The detailed message. */
	private String detailMessage;

	/** The usual constructor. */
	public VerificationResult(int status, String message){
		numeric = status;
		detailMessage = message;
	}

	/** Returns one one the VERIFIED_OK, VERIFIED_NOTYET, VERIFIED_REJECTED constants. */
	public int getStatus(){
		return numeric;
	}

	/** Returns a detailed message. */
	public String getMessage(){
		return detailMessage;
	}

	/**
	 * Returns if two VerificationResult instances are equal.
	 */ 
	public boolean equals(Object o){
		if (! (o instanceof VerificationResult)) return false;
		VerificationResult other = (VerificationResult) o;
		return ((other.numeric == this.numeric) && (other.detailMessage.equals(this.detailMessage)));
	}
	
	/**
	 * Returns a String representation of the VerificationResult.
	 */
	public String toString(){
		String ret="";
		if (numeric == VERIFIED_NOTYET)   ret = "VERIFIED_NOTYET";
		if (numeric == VERIFIED_OK)       ret = "VERIFIED_OK";
		if (numeric == VERIFIED_REJECTED) ret = "VERIFIED_REJECTED";
		ret+="\n"+detailMessage+"\n";
		return ret;
	}
}