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package org.spongycastle.asn1.x509;
import java.util.Enumeration;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.DERSequence;
/**
* Targets structure used in target information extension for attribute
* certificates from RFC 3281.
*
* <pre>
* Targets ::= SEQUENCE OF Target
*
* Target ::= CHOICE {
* targetName [0] GeneralName,
* targetGroup [1] GeneralName,
* targetCert [2] TargetCert
* }
*
* TargetCert ::= SEQUENCE {
* targetCertificate IssuerSerial,
* targetName GeneralName OPTIONAL,
* certDigestInfo ObjectDigestInfo OPTIONAL
* }
* </pre>
*
* @see org.spongycastle.asn1.x509.Target
* @see org.spongycastle.asn1.x509.TargetInformation
*/
public class Targets
extends ASN1Object
{
private ASN1Sequence targets;
/**
* Creates an instance of a Targets from the given object.
* <p>
* <code>obj</code> can be a Targets or a {@link ASN1Sequence}
*
* @param obj The object.
* @return A Targets instance.
* @throws IllegalArgumentException if the given object cannot be
* interpreted as Target.
*/
public static Targets getInstance(Object obj)
{
if (obj instanceof Targets)
{
return (Targets)obj;
}
else if (obj != null)
{
return new Targets(ASN1Sequence.getInstance(obj));
}
return null;
}
/**
* Constructor from ASN1Sequence.
*
* @param targets The ASN.1 SEQUENCE.
* @throws IllegalArgumentException if the contents of the sequence are
* invalid.
*/
private Targets(ASN1Sequence targets)
{
this.targets = targets;
}
/**
* Constructor from given targets.
* <p>
* The vector is copied.
*
* @param targets A <code>Vector</code> of {@link Target}s.
* @see Target
* @throws IllegalArgumentException if the vector contains not only Targets.
*/
public Targets(Target[] targets)
{
this.targets = new DERSequence(targets);
}
/**
* Returns the targets in a <code>Vector</code>.
* <p>
* The vector is cloned before it is returned.
*
* @return Returns the targets.
*/
public Target[] getTargets()
{
Target[] targs = new Target[targets.size()];
int count = 0;
for (Enumeration e = targets.getObjects(); e.hasMoreElements();)
{
targs[count++] = Target.getInstance(e.nextElement());
}
return targs;
}
/**
* Produce an object suitable for an ASN1OutputStream.
*
* Returns:
*
* <pre>
* Targets ::= SEQUENCE OF Target
* </pre>
*
* @return a ASN1Primitive
*/
public ASN1Primitive toASN1Primitive()
{
return targets;
}
}
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