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Sourcecode: libgnucrypto-java version File versions  Download package

BERTaggedObject.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.util.*;

/**
 * BER TaggedObject - in ASN.1 nottation this is any object proceeded by
 * a [n] where n is some number - these are assume to follow the construction
 * rules (as with sequences).
 */
00037 public class BERTaggedObject
    extends DERTaggedObject
{
    /**
     * @param tagNo the tag number for this object.
     * @param obj the tagged object.
     */
00044     public BERTaggedObject(
        int             tagNo,
        DEREncodable    obj)
    {
            super(tagNo, obj);
    }

    /**
     * @param explicit true if an explicitly tagged object.
     * @param tagNo the tag number for this object.
     * @param obj the tagged object.
     */
00056     public BERTaggedObject(
        boolean         explicit,
        int             tagNo,
        DEREncodable    obj)
    {
            super(explicit, tagNo, obj);
    }

    /**
     * create an implicitly tagged object that contains a zero
     * length sequence.
     */
00068     public BERTaggedObject(
        int             tagNo)
    {
        super(false, tagNo, new BERConstructedSequence());
    }

    void encode(
        DEROutputStream  out)
        throws IOException
    {
        if (out instanceof ASN1OutputStream || out instanceof BEROutputStream)
        {
            out.write(CONSTRUCTED | TAGGED | tagNo);
            out.write(0x80);

            if (!empty)
            {
                if (!explicit)
                {
                    if (obj instanceof BERConstructedOctetString)
                    {
                        Enumeration  e = ((BERConstructedOctetString)obj).getObjects();

                        while (e.hasMoreElements())
                        {
                            out.writeObject(e.nextElement());
                        }
                    }
                    else if (obj instanceof ASN1Sequence)
                    {
                        Enumeration  e = ((ASN1Sequence)obj).getObjects();

                        while (e.hasMoreElements())
                        {
                            out.writeObject(e.nextElement());
                        }
                    }
                    else if (obj instanceof ASN1Set)
                    {
                        Enumeration  e = ((ASN1Set)obj).getObjects();

                        while (e.hasMoreElements())
                        {
                            out.writeObject(e.nextElement());
                        }
                    }
                    else
                    {
                        throw new RuntimeException("not implemented: " + obj.getClass().getName());
                    }
                }
                else
                {
                    out.writeObject(obj);
                }
            }

            out.write(0x00);
            out.write(0x00);
        }
        else
        {
            super.encode(out);
        }
    }
}

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