using System;
namespace Org.BouncyCastle.Asn1.X509{
/**
* Target information extension for attributes certificates according to RFC
* 3281.
*
* <pre>
* SEQUENCE OF Targets
* </pre>
*
*/
public class TargetInformation
: Asn1Encodable
{
private readonly Asn1Sequence targets;
/**
* Creates an instance of a TargetInformation from the given object.
* <p>
* <code>obj</code> can be a TargetInformation or a {@link Asn1Sequence}</p>
*
* @param obj The object.
* @return A TargetInformation instance.
* @throws ArgumentException if the given object cannot be interpreted as TargetInformation.
*/
public static TargetInformation GetInstance(
object obj)
{
if (obj is TargetInformation)
{
return (TargetInformation) obj;
}
if (obj is Asn1Sequence)
{
return new TargetInformation((Asn1Sequence) obj);
}
throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
}
/**
* Constructor from a Asn1Sequence.
*
* @param seq The Asn1Sequence.
* @throws ArgumentException if the sequence does not contain
* correctly encoded Targets elements.
*/
private TargetInformation(
Asn1Sequence targets)
{
this.targets = targets;
}
/**
* Returns the targets in this target information extension.
* <p>
* The ArrayList is cloned before it is returned.</p>
*
* @return Returns the targets.
*/
public virtual Targets[] GetTargetsObjects()
{
Targets[] result = new Targets[targets.Count];
for (int i = 0; i < targets.Count; ++i)
{
result[i] = Targets.GetInstance(targets[i]);
}
return result;
}
/**
* Constructs a target information from a single targets element.
* According to RFC 3281 only one targets element must be produced.
*
* @param targets A Targets instance.
*/
public TargetInformation(
Targets targets)
{
this.targets = new DerSequence(targets);
}
/**
* According to RFC 3281 only one targets element must be produced. If
* multiple targets are given they must be merged in
* into one targets element.
*
* @param targets An array with {@link Targets}.
*/
public TargetInformation(
Target[] targets)
: this(new Targets(targets))
{
}
/**
* Produce an object suitable for an Asn1OutputStream.
*
* Returns:
*
* <pre>
* SEQUENCE OF Targets
* </pre>
*
* <p>
* According to RFC 3281 only one targets element must be produced. If
* multiple targets are given in the constructor they are merged into one
* targets element. If this was produced from a
* {@link Org.BouncyCastle.Asn1.Asn1Sequence} the encoding is kept.</p>
*
* @return an Asn1Object
*/
public override Asn1Object ToAsn1Object()
{
return targets;
}
}
}
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