de.tsenger.animamea.asn1.FileID.java Source code

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Here is the source code for de.tsenger.animamea.asn1.FileID.java

Source

/**
 *  Copyright 2011, Tobias Senger
 *  
 *  This file is part of animamea.
 *
 *  Animamea is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Animamea is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License   
 *  along with animamea.  If not, see <http://www.gnu.org/licenses/>.
 */

package de.tsenger.animamea.asn1;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DEROctetString;

import de.tsenger.animamea.tools.HexString;

/**
 * 
 * @author Tobias Senger (tobias@t-senger.de)
 */
public class FileID extends ASN1Object {

    private DEROctetString fid = null;
    private DEROctetString sfid = null;

    public FileID(ASN1Sequence seq) {
        fid = (DEROctetString) seq.getObjectAt(0);
        if (seq.size() > 1) {
            sfid = (DEROctetString) seq.getObjectAt(1);
        }
    }

    public byte[] getFID() {
        return fid.getOctets();
    }

    public byte getSFID() {
        if (sfid != null)
            return (sfid.getOctets()[0]);
        else
            return -1; // optionales Feld sfid ist nicht vorhanden
    }

    @Override
    public String toString() {
        return "FileID \n\tFID: " + HexString.bufferToHex(getFID()) + "\n\tSFID: " + getSFID() + "\n";
    }

    /**
     * The definition of FileID is
      * <pre>
      * FileID ::= SEQUENCE {
      *      fid      OCTET STRING (SIZE(2)),
      *      sfid   OCTET STRING (SIZE(1)) OPTIONAL
      * }
      * </pre>
     */
    @Override
    public ASN1Primitive toASN1Primitive() {
        ASN1EncodableVector v = new ASN1EncodableVector();
        v.add(fid);
        if (sfid != null)
            v.add(sfid);

        return ASN1Sequence.getInstance(v);
    }

}