www.pudn.com > cryptix-asn1-0.1.11.zip > DerInvalidLengthException.java

/* $Id: DerInvalidLengthException.java,v 1.1.1.1 2001/02/24 04:58:58 raif Exp $ 
 * 
 * Copyright (C) 1997-2001 The Cryptix Foundation Limited. All rights reserved. 
 * 
 * Use, modification, copying and distribution of this software is subject to 
 * the terms and conditions of the Cryptix General Licence. You should have 
 * received a copy of the Cryptix General Licence along with this library; if 
 * not, you can download a copy from http://www.cryptix.org/ 
 */ 
package cryptix.asn1.encoding; 
 
import cryptix.asn1.io.EncodingException; 
 
/** 
 * A subclass of EncodingException class (checked exception) to 
 * denote that the parsed size of the data to read from the stream (in number 
 * of bytes) does not match the value expected for a specific ASN.1 type.
 
 * 
 * @version $Revision: 1.1.1.1 $ 
 * @author  Raif S. Naffah 
 */ 
public class DerInvalidLengthException extends EncodingException { 
 
	// Constants and vars 
	// ....................................................................... 
 
	/** 
	 * The ID of the ASN.1 UNIVERSAL type for which a length mismatch was 
	 * detected. 
	 */ 
	private int typeID; 
 
	/** 
	 * The expected length value. This is what got parsed in the Length part of 
	 * the DER triplet. 
	 */ 
	private int expectedLength; 
 
	/** 
	 * The actual number of bytes, constituting the size/length of the element 
	 * itself. 
	 */ 
	private int actualLength; 
 
	// Constructor(s) 
	// ....................................................................... 
 
	/** 
	 * Constructs a DerLengthMismatchException with no detail message. 
	 * 
	 * @param tagValue the ID of the ASN.1 UNIVERSAL type. It is the same value 
	 * as that of the type's Tag value field instance; ie. that returned by the 
	 * getValue() method when invoked on this element's Tag instance. 
	 * @param xLength the known pre-determined length value of the designated 
	 * type. 
	 * @param aLength the expected (parsed from the Length part of the DER 
	 * triplet) length value. 
	 */ 
	public DerInvalidLengthException(int tagValue, int xLength, int aLength) { 
		super("DER"); 
 
		this.typeID = tagValue; 
		this.expectedLength = xLength; 
		this.actualLength = aLength; 
	} 
 
	// Instance methods 
	// ....................................................................... 
 
	/** 
	 * Returns an identifier of the UNIVERSAL type for which a length mismatch 
	 * was detected. 
	 * 
	 * @return an ID of the type for which the mismatch was detected. 
	 */ 
	public int getTypeID() { 
		return (this.typeID); 
	} 
 
	/** 
	 * Returns the expected size in bytes of the element in the stream. 
	 * 
	 * @return the expected size of the element's encoding. 
	 */ 
	public int getExpectedLength() { 
		return (this.expectedLength); 
	} 
 
	/** 
	 * Returns the actual size in bytes of the element in the stream. 
	 * 
	 * @return the actual size of the element's encoding. 
	 */ 
	public int getActualLength() { 
		return (this.actualLength); 
	} 
}