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package com.lowagie.bc.asn1;
import java.io.IOException;
public class DERBoolean
extends DERObject
{
byte value;
public static final DERBoolean FALSE = new DERBoolean(false);
public static final DERBoolean TRUE = new DERBoolean(true);
/**
* return a boolean from the passed in object.
*
* @exception IllegalArgumentException if the object cannot be converted.
*/
public static DERBoolean getInstance(
Object obj)
{
if (obj == null || obj instanceof DERBoolean)
{
return (DERBoolean)obj;
}
if (obj instanceof ASN1OctetString)
{
return new DERBoolean(((ASN1OctetString)obj).getOctets());
}
if (obj instanceof ASN1TaggedObject)
{
return getInstance(((ASN1TaggedObject)obj).getObject());
}
throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
}
/**
* return a DERBoolean from the passed in boolean.
*/
public static DERBoolean getInstance(
boolean value)
{
return (value ? TRUE : FALSE);
}
/**
* return a Boolean 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 DERBoolean getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(obj.getObject());
}
public DERBoolean(
byte[] value)
{
this.value = value[0];
}
public DERBoolean(
boolean value)
{
this.value = (value) ? (byte)0xff : (byte)0;
}
public boolean isTrue()
{
return (value != 0);
}
void encode(
DEROutputStream out)
throws IOException
{
byte[] bytes = new byte[1];
bytes[0] = value;
out.writeEncoded(BOOLEAN, bytes);
}
public boolean equals(
Object o)
{
if ((o == null) || !(o instanceof DERBoolean))
{
return false;
}
return (value == ((DERBoolean)o).value);
}
}
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