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package org.bouncycastle.asn1.cms;
import org.bouncycastle.asn1.ASN1Choice;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERTaggedObject;
/**
* <a href="http://tools.ietf.org/html/rfc5544">RFC 5544</a>:
* Binding Documents with Time-Stamps; Evidence object.
* <p>
* <pre>
* Evidence ::= CHOICE {
* tstEvidence [0] TimeStampTokenEvidence, -- see RFC 3161
* ersEvidence [1] EvidenceRecord, -- see RFC 4998
* otherEvidence [2] OtherEvidence
* }
* </pre>
*/
public class Evidence
extends ASN1Object
implements ASN1Choice
{
private TimeStampTokenEvidence tstEvidence;
public Evidence(TimeStampTokenEvidence tstEvidence)
{
this.tstEvidence = tstEvidence;
}
private Evidence(ASN1TaggedObject tagged)
{
if (tagged.getTagNo() == 0)
{
this.tstEvidence = TimeStampTokenEvidence.getInstance(tagged, false);
}
}
/**
* Return an Evidence object from the given object.
* <p>
* Accepted inputs:
* <ul>
* <li> {@link Evidence} object
* <li> {@link org.bouncycastle.asn1.ASN1TaggedObject#getInstance(java.lang.Object) ASN1TaggedObject} input formats with Evidence data inside
* </ul>
*
* @param obj the object we want converted.
* @exception IllegalArgumentException if the object cannot be converted.
*/
public static Evidence getInstance(Object obj)
{
if (obj == null || obj instanceof Evidence)
{
return (Evidence)obj;
}
else if (obj instanceof ASN1TaggedObject)
{
return new Evidence(ASN1TaggedObject.getInstance(obj));
}
throw new IllegalArgumentException("unknown object in getInstance");
}
public TimeStampTokenEvidence getTstEvidence()
{
return tstEvidence;
}
public ASN1Primitive toASN1Primitive()
{
if (tstEvidence != null)
{
return new DERTaggedObject(false, 0, tstEvidence);
}
return null;
}
}
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