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JCIFS is an Open Source client library that implements the CIFS/SMB networking protocol in 100% Java
There is a newer version: 1.3.18.1
/* Copyright (c) 2000 The Legion Of The Bouncy Castle
 * (http://www.bouncycastle.org)
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package jcifs.spnego.asn1;

import java.io.IOException;

public class DERBoolean
    extends DERObject
{
    byte         value;

    public static final DERBoolean FALSE = new DERBoolean(false);
    public static final DERBoolean TRUE  = new DERBoolean(true);

    /**
     * return a boolean from the passed in object.
     *
     * @exception IllegalArgumentException if the object cannot be converted.
     */
    public static DERBoolean getInstance(
        Object  obj)
    {
        if (obj == null || obj instanceof DERBoolean)
        {
            return (DERBoolean)obj;
        }

        if (obj instanceof ASN1OctetString)
        {
            return new DERBoolean(((ASN1OctetString)obj).getOctets());
        }

        if (obj instanceof ASN1TaggedObject)
        {
            return getInstance(((ASN1TaggedObject)obj).getObject());
        }

        throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
    }

    /**
     * return a DERBoolean from the passed in boolean.
     */
    public static DERBoolean getInstance(
        boolean  value)
    {
        return (value ? TRUE : FALSE);
    }

    /**
     * return a Boolean from a tagged object.
     *
     * @param obj the tagged object holding the object we want
     * @param explicit true if the object is meant to be explicitly
     *              tagged false otherwise.
     * @exception IllegalArgumentException if the tagged object cannot
     *               be converted.
     */
    public static DERBoolean getInstance(
        ASN1TaggedObject obj,
        boolean          explicit)
    {
        return getInstance(obj.getObject());
    }
    
    public DERBoolean(
        byte[]       value)
    {
        this.value = value[0];
    }

    public DERBoolean(
        boolean     value)
    {
        this.value = (value) ? (byte)0xff : (byte)0;
    }

    public boolean isTrue()
    {
        return (value != 0);
    }

    void encode(
        DEROutputStream out)
        throws IOException
    {
        byte[]  bytes = new byte[1];

        bytes[0] = value;

        out.writeEncoded(BOOLEAN, bytes);
    }
    
    public boolean equals(
        Object  o)
    {
        if ((o == null) || !(o instanceof DERBoolean))
        {
            return false;
        }

        return (value == ((DERBoolean)o).value);
    }

}