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/* see bouncycastle_license.txt */
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);
}
}
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