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package org.spongycastle.asn1.cms;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Set;
import org.spongycastle.asn1.DLSet;
/**
* <a href="http://tools.ietf.org/html/rfc5652">RFC 5652</a> defines
* 5 "SET OF Attribute" entities with 5 different names.
* This is common implementation for them all:
* <pre>
* SignedAttributes ::= SET SIZE (1..MAX) OF Attribute
* UnsignedAttributes ::= SET SIZE (1..MAX) OF Attribute
* UnprotectedAttributes ::= SET SIZE (1..MAX) OF Attribute
* AuthAttributes ::= SET SIZE (1..MAX) OF Attribute
* UnauthAttributes ::= SET SIZE (1..MAX) OF Attribute
*
* Attributes ::=
* SET SIZE(1..MAX) OF Attribute
* </pre>
*/
public class Attributes
extends ASN1Object
{
private ASN1Set attributes;
private Attributes(ASN1Set set)
{
attributes = set;
}
public Attributes(ASN1EncodableVector v)
{
attributes = new DLSet(v);
}
/**
* Return an Attribute set object from the given object.
* <p>
* Accepted inputs:
* <ul>
* <li> null → null
* <li> {@link Attributes} object
* <li> {@link org.spongycastle.asn1.ASN1Set#getInstance(java.lang.Object) ASN1Set} input formats with Attributes structure inside
* </ul>
*
* @param obj the object we want converted.
* @exception IllegalArgumentException if the object cannot be converted.
*/
public static Attributes getInstance(Object obj)
{
if (obj instanceof Attributes)
{
return (Attributes)obj;
}
else if (obj != null)
{
return new Attributes(ASN1Set.getInstance(obj));
}
return null;
}
public Attribute[] getAttributes()
{
Attribute[] rv = new Attribute[attributes.size()];
for (int i = 0; i != rv.length; i++)
{
rv[i] = Attribute.getInstance(attributes.getObjectAt(i));
}
return rv;
}
/**
* Produce an object suitable for an ASN1OutputStream.
*/
public ASN1Primitive toASN1Primitive()
{
return attributes;
}
}
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