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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.IOException;

import port.org.bouncycastle.util.Arrays;
import port.org.bouncycastle.util.Strings;

/**
 * DER VisibleString object encoding ISO 646 (ASCII) character code points 32 to 126.
 * 
 * Explicit character set escape sequences are not allowed.
 * 
 */
public class DERVisibleString extends ASN1Primitive implements ASN1String {

	private byte[] string;

	/**
	 * Return a Visible String from the passed in object.
	 *
	 * @param obj
	 *            a DERVisibleString or an object that can be converted into one.
	 * @exception IllegalArgumentException
	 *                if the object cannot be converted.
	 * @return a DERVisibleString instance, or null
	 */
	public static DERVisibleString getInstance(Object obj) {
		if ((obj == null) || (obj instanceof DERVisibleString)) {
			return (DERVisibleString) obj;
		}

		if (obj instanceof byte[]) {
			try {
				return (DERVisibleString) fromByteArray((byte[]) obj);
			} catch (Exception e) {
				throw new IllegalArgumentException("encoding error in getInstance: " + e.toString());
			}
		}

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

	/**
	 * Return a Visible String 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.
	 * @return a DERVisibleString instance, or null
	 */
	public static DERVisibleString getInstance(ASN1TaggedObject obj, boolean explicit) {
		ASN1Primitive o = obj.getObject();

		if (explicit || (o instanceof DERVisibleString)) {
			return getInstance(o);
		} else {
			return new DERVisibleString(ASN1OctetString.getInstance(o).getOctets());
		}
	}

	/**
	 * Basic constructor - byte encoded string.
	 */
	DERVisibleString(byte[] string) {
		this.string = string;
	}

	/**
	 * Basic constructor
	 */
	public DERVisibleString(String string) {
		this.string = Strings.toByteArray(string);
	}

	@Override
	public String getString() {
		return Strings.fromByteArray(string);
	}

	@Override
	public String toString() {
		return getString();
	}

	public byte[] getOctets() {
		return Arrays.clone(string);
	}

	@Override
	boolean isConstructed() {
		return false;
	}

	@Override
	int encodedLength() {
		return 1 + StreamUtil.calculateBodyLength(string.length) + string.length;
	}

	@Override
	void encode(ASN1OutputStream out) throws IOException {
		out.writeEncoded(BERTags.VISIBLE_STRING, this.string);
	}

	@Override
	boolean asn1Equals(ASN1Primitive o) {
		if (!(o instanceof DERVisibleString)) {
			return false;
		}

		return Arrays.areEqual(string, ((DERVisibleString) o).string);
	}

	@Override
	public int hashCode() {
		return Arrays.hashCode(string);
	}

}