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DSS Model contains the data model representation for DSS

There is a newer version: 6.0.d4j.2

package port.org.bouncycastle.asn1;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

import port.org.bouncycastle.util.Encodable;

/**
 * Base class for defining an ASN.1 object.
 */
public abstract class ASN1Object implements ASN1Encodable, Encodable {
	/**
	 * Return the default BER or DER encoding for this object.
	 *
	 * @return BER/DER byte encoded object.
	 * @throws java.io.IOException
	 *             on encoding error.
	 */
	public byte[] getEncoded() throws IOException {
		ByteArrayOutputStream bOut = new ByteArrayOutputStream();
		ASN1OutputStream aOut = new ASN1OutputStream(bOut);

		aOut.writeObject(this);

		return bOut.toByteArray();
	}

	/**
	 * Return either the default for "BER" or a DER encoding if "DER" is specified.
	 *
	 * @param encoding
	 *            name of encoding to use.
	 * @return byte encoded object.
	 * @throws IOException
	 *             on encoding error.
	 */
	public byte[] getEncoded(String encoding) throws IOException {
		if (encoding.equals(ASN1Encoding.DER)) {
			ByteArrayOutputStream bOut = new ByteArrayOutputStream();
			DEROutputStream dOut = new DEROutputStream(bOut);

			dOut.writeObject(this);

			return bOut.toByteArray();
		} else if (encoding.equals(ASN1Encoding.DL)) {
			ByteArrayOutputStream bOut = new ByteArrayOutputStream();
			DLOutputStream dOut = new DLOutputStream(bOut);

			dOut.writeObject(this);

			return bOut.toByteArray();
		}

		return this.getEncoded();
	}

	@Override
	public int hashCode() {
		return this.toASN1Primitive().hashCode();
	}

	@Override
	public boolean equals(Object o) {
		if (this == o) {
			return true;
		}

		if (!(o instanceof ASN1Encodable)) {
			return false;
		}

		ASN1Encodable other = (ASN1Encodable) o;

		return this.toASN1Primitive().equals(other.toASN1Primitive());
	}

	/**
	 * @deprecated use toASN1Primitive()
	 * @return the underlying primitive type.
	 */
	@Deprecated
	public ASN1Primitive toASN1Object() {
		return this.toASN1Primitive();
	}

	/**
	 * Return true if obj is a byte array and represents an object with the given tag value.
	 *
	 * @param obj
	 *            object of interest.
	 * @param tagValue
	 *            tag value to check for.
	 * @return true if obj is a byte encoding starting with the given tag value, false otherwise.
	 */
	protected static boolean hasEncodedTagValue(Object obj, int tagValue) {
		return (obj instanceof byte[]) && (((byte[]) obj)[0] == tagValue);
	}

	/**
	 * Method providing a primitive representation of this object suitable for encoding.
	 *
	 * @return a primitive representation of this object.
	 */
	@Override
	public abstract ASN1Primitive toASN1Primitive();
}