// Copyright (c) 2002 Graz University of Technology. All rights reserved.
// 
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// are permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice, this
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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//    include the following acknowledgment:
// 
//    "This product includes software developed by IAIK of Graz University of
//     Technology."
// 
//    Alternately, this acknowledgment may appear in the software itself, if and
//    wherever such third-party acknowledgments normally appear.
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// 4. The names "Graz University of Technology" and "IAIK of Graz University of
//    Technology" must not be used to endorse or promote products derived from this
//    software without prior written permission.
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// 5. Products derived from this software may not be called "IAIK PKCS Wrapper",
//    nor may "IAIK" appear in their name, without prior written permission of
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package iaik.pkcs.pkcs11.objects;

/**
 * Objects of this class represent a boolean attribute of a PKCS#11 object
 * as specified by PKCS#11.
 *
 * @author <a href="mailto:Karl.Scheibelhofer@iaik.at"> Karl Scheibelhofer </a>
 * @version 1.0
 * @invariants
 */
public class BooleanAttribute extends Attribute {

	/**
	 * Default constructor - only for internal use in AttributeArrayAttribute.getValueString().
	 */
	BooleanAttribute() {
		super();
	}

	/**
	 * Constructor taking the PKCS#11 type of the attribute.
	 *
	 * @param type The PKCS'11 type of this attribute; e.g.
	 *             PKCS11Constants.CKA_PRIVATE.
	 * @preconditions (type <> null)
	 * @postconditions
	 */
	public BooleanAttribute(Long type) {
		super(type);
	}

	/**
	 * Set the boolean value of this attribute. Null, is also valid.
	 * A call to this method sets the present flag to true.
	 *
	 * @param value The boolean value to set. May be null.
	 * @preconditions
	 * @postconditions
	 */
	public void setBooleanValue(Boolean value) {
		ckAttribute_.pValue = value;
		present_ = true;
	}

	/**
	 * Get the boolean value of this attribute. Null, is also possible.
	 *
	 * @return The boolean value of this attribute or null.
	 * @preconditions
	 * @postconditions
	 */
	public Boolean getBooleanValue() {
		return (Boolean) ckAttribute_.pValue;
	}

	/* (non-Javadoc)
	 * @see iaik.pkcs.pkcs11.objects.Attribute#setValue(java.lang.Object) */
	public void setValue(java.lang.Object value)
	    throws UnsupportedOperationException
	{
		setBooleanValue((Boolean) value);
	}

}