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Sourcecode: libgnucrypto-java version File versions  Download package

DEREnumerated.java

/*
 * 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 org.bouncycastle.asn1;

import java.io.*;
import java.math.BigInteger;

public class DEREnumerated
    extends DERObject
{
    byte[]      bytes;

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

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

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

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

    /**
     * return an Enumerated 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 DEREnumerated getInstance(
        ASN1TaggedObject obj,
        boolean          explicit)
    {
        return getInstance(obj.getObject());
    }

    public DEREnumerated(
        int         value)
    {
        bytes = BigInteger.valueOf(value).toByteArray();
    }

    public DEREnumerated(
        BigInteger   value)
    {
        bytes = value.toByteArray();
    }

    public DEREnumerated(
        byte[]   bytes)
    {
        this.bytes = bytes;
    }

    public BigInteger getValue()
    {
        return new BigInteger(bytes);
    }

    void encode(
        DEROutputStream out)
        throws IOException
    {
        out.writeEncoded(ENUMERATED, bytes);
    }
    
    public boolean equals(
        Object  o)
    {
        if (o == null || !(o instanceof DEREnumerated))
        {
            return false;
        }

        DEREnumerated other = (DEREnumerated)o;

        if (bytes.length != other.bytes.length)
        {
            return false;
        }

        for (int i = 0; i != bytes.length; i++)
        {
            if (bytes[i] != other.bytes[i])
            {
                return false;
            }
        }

        return true;
    }
}

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