org.bouncycastle.asn1.x509.qualified.SemanticsInformation.java Source code

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Here is the source code for org.bouncycastle.asn1.x509.qualified.SemanticsInformation.java

Source

package org.bouncycastle.asn1.x509.qualified;

import java.util.Enumeration;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.x509.GeneralName;

/**
 * The SemanticsInformation object.
 * <pre>
 *       SemanticsInformation ::= SEQUENCE {
 *         semanticsIdentifier        OBJECT IDENTIFIER   OPTIONAL,
 *         nameRegistrationAuthorities NameRegistrationAuthorities
 *                                                         OPTIONAL }
 *         (WITH COMPONENTS {..., semanticsIdentifier PRESENT}|
 *          WITH COMPONENTS {..., nameRegistrationAuthorities PRESENT})
 *
 *     NameRegistrationAuthorities ::=  SEQUENCE SIZE (1..MAX) OF
 *         GeneralName
 * </pre>
 */
public class SemanticsInformation extends ASN1Object {
    private ASN1ObjectIdentifier semanticsIdentifier;
    private GeneralName[] nameRegistrationAuthorities;

    public static SemanticsInformation getInstance(Object obj) {
        if (obj instanceof SemanticsInformation) {
            return (SemanticsInformation) obj;
        }

        if (obj != null) {
            return new SemanticsInformation(ASN1Sequence.getInstance(obj));
        }

        return null;
    }

    private SemanticsInformation(ASN1Sequence seq) {
        Enumeration e = seq.getObjects();
        if (seq.size() < 1) {
            throw new IllegalArgumentException("no objects in SemanticsInformation");
        }

        Object object = e.nextElement();
        if (object instanceof ASN1ObjectIdentifier) {
            semanticsIdentifier = ASN1ObjectIdentifier.getInstance(object);
            if (e.hasMoreElements()) {
                object = e.nextElement();
            } else {
                object = null;
            }
        }

        if (object != null) {
            ASN1Sequence generalNameSeq = ASN1Sequence.getInstance(object);
            nameRegistrationAuthorities = new GeneralName[generalNameSeq.size()];
            for (int i = 0; i < generalNameSeq.size(); i++) {
                nameRegistrationAuthorities[i] = GeneralName.getInstance(generalNameSeq.getObjectAt(i));
            }
        }
    }

    public SemanticsInformation(ASN1ObjectIdentifier semanticsIdentifier, GeneralName[] generalNames) {
        this.semanticsIdentifier = semanticsIdentifier;
        this.nameRegistrationAuthorities = cloneNames(generalNames);
    }

    public SemanticsInformation(ASN1ObjectIdentifier semanticsIdentifier) {
        this.semanticsIdentifier = semanticsIdentifier;
        this.nameRegistrationAuthorities = null;
    }

    public SemanticsInformation(GeneralName[] generalNames) {
        this.semanticsIdentifier = null;
        this.nameRegistrationAuthorities = cloneNames(generalNames);
    }

    public ASN1ObjectIdentifier getSemanticsIdentifier() {
        return semanticsIdentifier;
    }

    public GeneralName[] getNameRegistrationAuthorities() {
        return cloneNames(nameRegistrationAuthorities);
    }

    public ASN1Primitive toASN1Primitive() {
        ASN1EncodableVector seq = new ASN1EncodableVector(2);

        if (this.semanticsIdentifier != null) {
            seq.add(semanticsIdentifier);
        }
        if (this.nameRegistrationAuthorities != null) {
            seq.add(new DERSequence(nameRegistrationAuthorities));
        }

        return new DERSequence(seq);
    }

    private static GeneralName[] cloneNames(GeneralName[] names) {
        if (names != null) {
            GeneralName[] tmp = new GeneralName[names.length];

            System.arraycopy(names, 0, tmp, 0, names.length);

            return tmp;
        }
        return null;
    }
}