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package sun.security.x509;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.math.BigInteger;
import java.util.Enumeration;

import sun.security.util.*;

This class defines the SerialNumber attribute for the Certificate.
Author:
Amit Kapoor, Hemma Prafullchandra
See Also:
CertAttrSet/**
 * This class defines the SerialNumber attribute for the Certificate.
 *
 * @author Amit Kapoor
 * @author Hemma Prafullchandra
 * @see CertAttrSet
 */
public class CertificateSerialNumber implements CertAttrSet<String> {
    
Identifier for this attribute, to be used with the
get, set, delete methods of Certificate, x509 type.
/**
     * Identifier for this attribute, to be used with the
     * get, set, delete methods of Certificate, x509 type.
     */
    public static final String IDENT = "x509.info.serialNumber";

    
Sub attributes name for this CertAttrSet.
/**
     * Sub attributes name for this CertAttrSet.
     */
    public static final String NAME = "serialNumber";
    public static final String NUMBER = "number";

    private SerialNumber        serial;

    
Default constructor for the certificate attribute.
Params:
num – the serial number for the certificate./**
     * Default constructor for the certificate attribute.
     *
     * @param num the serial number for the certificate.
     */
    public CertificateSerialNumber(BigInteger num) {
      this.serial = new SerialNumber(num);
    }

    
Default constructor for the certificate attribute.
Params:
num – the serial number for the certificate./**
     * Default constructor for the certificate attribute.
     *
     * @param num the serial number for the certificate.
     */
    public CertificateSerialNumber(int num) {
      this.serial = new SerialNumber(num);
    }

    
Create the object, decoding the values from the passed DER stream.
Params:
in – the DerInputStream to read the serial number from.
Throws:
IOException – on decoding errors./**
     * Create the object, decoding the values from the passed DER stream.
     *
     * @param in the DerInputStream to read the serial number from.
     * @exception IOException on decoding errors.
     */
    public CertificateSerialNumber(DerInputStream in) throws IOException {
        serial = new SerialNumber(in);
    }

    
Create the object, decoding the values from the passed stream.
Params:
in – the InputStream to read the serial number from.
Throws:
IOException – on decoding errors./**
     * Create the object, decoding the values from the passed stream.
     *
     * @param in the InputStream to read the serial number from.
     * @exception IOException on decoding errors.
     */
    public CertificateSerialNumber(InputStream in) throws IOException {
        serial = new SerialNumber(in);
    }

    
Create the object, decoding the values from the passed DerValue.
Params:
val – the DER encoded value.
Throws:
IOException – on decoding errors./**
     * Create the object, decoding the values from the passed DerValue.
     *
     * @param val the DER encoded value.
     * @exception IOException on decoding errors.
     */
    public CertificateSerialNumber(DerValue val) throws IOException {
        serial = new SerialNumber(val);
    }

    
Return the serial number as user readable string.
/**
     * Return the serial number as user readable string.
     */
    public String toString() {
        if (serial == null) return "";
        return (serial.toString());
    }

    
Encode the serial number in DER form to the stream.
Params:
out – the DerOutputStream to marshal the contents to.
Throws:
IOException – on errors./**
     * Encode the serial number in DER form to the stream.
     *
     * @param out the DerOutputStream to marshal the contents to.
     * @exception IOException on errors.
     */
    public void encode(OutputStream out) throws IOException {
        DerOutputStream tmp = new DerOutputStream();
        serial.encode(tmp);

        out.write(tmp.toByteArray());
    }

    
Set the attribute value.
/**
     * Set the attribute value.
     */
    public void set(String name, Object obj) throws IOException {
        if (!(obj instanceof SerialNumber)) {
            throw new IOException("Attribute must be of type SerialNumber.");
        }
        if (name.equalsIgnoreCase(NUMBER)) {
            serial = (SerialNumber)obj;
        } else {
            throw new IOException("Attribute name not recognized by " +
                                "CertAttrSet:CertificateSerialNumber.");
        }
    }

    
Get the attribute value.
/**
     * Get the attribute value.
     */
    public SerialNumber get(String name) throws IOException {
        if (name.equalsIgnoreCase(NUMBER)) {
            return (serial);
        } else {
            throw new IOException("Attribute name not recognized by " +
                                "CertAttrSet:CertificateSerialNumber.");
        }
    }

    
Delete the attribute value.
/**
     * Delete the attribute value.
     */
    public void delete(String name) throws IOException {
        if (name.equalsIgnoreCase(NUMBER)) {
            serial = null;
        } else {
            throw new IOException("Attribute name not recognized by " +
                                "CertAttrSet:CertificateSerialNumber.");
        }
    }

    
Return an enumeration of names of attributes existing within this
attribute.
/**
     * Return an enumeration of names of attributes existing within this
     * attribute.
     */
    public Enumeration<String> getElements() {
        AttributeNameEnumeration elements = new AttributeNameEnumeration();
        elements.addElement(NUMBER);

        return (elements.elements());
    }

    
Return the name of this attribute.
/**
     * Return the name of this attribute.
     */
    public String getName() {
        return (NAME);
    }
}