uk.gov.nationalarchives.droid.signatureFile.Shift Maven / Gradle / Ivy

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/*
 * � The National Archives 2005-2006.  All rights reserved.
 * See Licence.txt for full licence details.
 *
 * Developed by:
 * Tessella Support Services plc
 * 3 Vineyard Chambers
 * Abingdon, OX14 3PX
 * United Kingdom
 * http://www.tessella.com
 *
 * Tessella/NPD/4305
 * PRONOM 4
 *
 * $History: Shift.java $
 * 
 * *****************  Version 6  *****************
 * User: Walm         Date: 17/05/05   Time: 12:48
 * Updated in $/PRONOM4/FFIT_SOURCE/signatureFile
 * wait for end of element tag before setting its content via the
 * completeElementContent method
 * 
 * *****************  Version 5  *****************
 * User: Walm         Date: 5/04/05    Time: 18:07
 * Updated in $/PRONOM4/FFIT_SOURCE/signatureFile
 * review headers
 *
 */
package uk.gov.nationalarchives.droid.signatureFile;

import uk.gov.nationalarchives.droid.base.MessageDisplay;
import uk.gov.nationalarchives.droid.base.SimpleElement;

/**
 * holds a shift function value
 * 
 * @author Martin Waller
 * @version 4.0.0
 */
public class Shift extends SimpleElement {
	long myShiftValue;
	int myShiftByte = 999;

	/**
	 * Set the shift distance when the end of element tag is reached. This will
	 * have been stored in the text attribute by the setText method defined in
	 * SimpleElement
	 */
	@Override
	public void completeElementContent() {
		final String theElementValue = getText(); // ((SimpleElement)this).getText();
		try {
			this.myShiftValue = Long.parseLong(theElementValue);
		} catch (final Exception e) {
			MessageDisplay
					.generalWarning("The following non-numerical shift distance was found in the signature file: "
							+ theElementValue);
			this.myShiftValue = 1;
		}

	}

	/* getters */
	public int getShiftByte() {
		return this.myShiftByte;
	}

	public long getShiftValue() {
		return this.myShiftValue;
	}

	/**
	 * Respond to an XML attribute
	 * 
	 * @param theName
	 *            attribute name
	 * @param theValue
	 *            attribute value
	 */
	@Override
	public void setAttributeValue(final String theName, final String theValue) {
		if (theName.equals("Byte")) {
			try {
				this.myShiftByte = Integer.parseInt(theValue, 16);
			} catch (final Exception e) {
			}
		} else {
			MessageDisplay.unknownAttributeWarning(theName, getElementName());
		}
	}
}