+ * return a printable string from the passed in object.
+ *
+ * @exception IllegalArgumentException if the object cannot be converted.
+ */
+ public static DERPrintableString getInstance(
+ Object obj)
+ {
+ if (obj == null || obj instanceof DERPrintableString)
+ {
+ return (DERPrintableString)obj;
+ }
+
+ if (obj instanceof ASN1OctetString)
+ {
+ return new DERPrintableString(((ASN1OctetString)obj).getOctets());
+ }
+
+ if (obj instanceof ASN1TaggedObject)
+ {
+ return getInstance(((ASN1TaggedObject)obj).getObject());
+ }
+
+ throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
+ }
+
+ /**
+ * return a Printable 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.
+ */
+ public static DERPrintableString getInstance(
+ ASN1TaggedObject obj,
+ boolean explicit)
+ {
+ return getInstance(obj.getObject());
+ }
+
+ /**