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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.4.

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package org.bouncycastle.asn1.x509;

import java.util.Enumeration;

import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;

/**
 * Target information extension for attributes certificates according to RFC
 * 3281.
 * 
 *  
 *           SEQUENCE OF Targets
 *


 * 
 */
public class TargetInformation
    extends ASN1Object
{
    private ASN1Sequence targets;

    /**
     * Creates an instance of a TargetInformation from the given object.
     *

* obj can be a TargetInformation or a {@link ASN1Sequence} * * @param obj The object. * @return A TargetInformation instance. * @throws IllegalArgumentException if the given object cannot be * interpreted as TargetInformation. */ public static TargetInformation getInstance(Object obj) { if (obj instanceof TargetInformation) { return (TargetInformation)obj; } else if (obj != null) { return new TargetInformation(ASN1Sequence.getInstance(obj)); } return null; } /** * Constructor from a ASN1Sequence. * * @param seq The ASN1Sequence. * @throws IllegalArgumentException if the sequence does not contain * correctly encoded Targets elements. */ private TargetInformation(ASN1Sequence seq) { targets = seq; } /** * Returns the targets in this target information extension. * * @return Returns the targets. */ public Targets[] getTargetsObjects() { Targets[] copy = new Targets[targets.size()]; int count = 0; for (Enumeration e = targets.getObjects(); e.hasMoreElements();) { copy[count++] = Targets.getInstance(e.nextElement()); } return copy; } /** * 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: * * * SEQUENCE OF Targets * * *

* 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. * * @return a ASN1Primitive */ public ASN1Primitive toASN1Primitive() { return targets; } }