package com.lowagie.bc.asn1; import java.io.IOException; /** * DER BMPString object. */ public class DERBMPString extends DERObject implements DERString { String string; /** * return a BMP String from the given object. * * @param obj the object we want converted. * @exception IllegalArgumentException if the object cannot be converted. */ public static DERBMPString getInstance( Object obj) { if (obj == null || obj instanceof DERBMPString) { return (DERBMPString)obj; } if (obj instanceof ASN1OctetString) { return new DERBMPString(((ASN1OctetString)obj).getOctets()); } if (obj instanceof ASN1TaggedObject) { return getInstance(((ASN1TaggedObject)obj).getObject()); } throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName()); } /** * return a BMP 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 DERBMPString getInstance( ASN1TaggedObject obj, boolean explicit) { return getInstance(obj.getObject()); } /** * basic constructor - byte encoded string. */ public DERBMPString( byte[] string) { char[] cs = new char[string.length / 2]; for (int i = 0; i != cs.length; i++) { cs[i] = (char)((string[2 * i] << 8) | (string[2 * i + 1] & 0xff)); } this.string = new String(cs); } /** * basic constructor */ public DERBMPString( String string) { this.string = string; } public String getString() { return string; } public int hashCode() { return this.getString().hashCode(); } public boolean equals( Object o) { if (!(o instanceof DERBMPString)) { return false; } DERBMPString s = (DERBMPString)o; return this.getString().equals(s.getString()); } void encode( DEROutputStream out) throws IOException { char[] c = string.toCharArray(); byte[] b = new byte[c.length * 2]; for (int i = 0; i != c.length; i++) { b[2 * i] = (byte)(c[i] >> 8); b[2 * i + 1] = (byte)c[i]; } out.writeEncoded(BMP_STRING, b); } }