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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.8 and up. The APIs are designed primarily to be used in conjunction with the BC LTS provider but may also be used with other providers providing cryptographic services.

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package org.bouncycastle.pkix;

import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.x500.X500Name;
import org.bouncycastle.asn1.x509.GeneralName;
import org.bouncycastle.asn1.x509.GeneralSubtree;
import org.bouncycastle.asn1.x509.NameConstraintValidatorException;

public class PKIXNameConstraintValidator
{
    ASN1PKIXNameConstraintValidator validator = new ASN1PKIXNameConstraintValidator();

    public PKIXNameConstraintValidator()
    {
    }

    public int hashCode()
    {
        return validator.hashCode();
    }

    public boolean equals(Object o)
    {
        if (!(o instanceof PKIXNameConstraintValidator))
        {
            return false;
        }
        PKIXNameConstraintValidator constraintValidator = (PKIXNameConstraintValidator)o;
        return this.validator.equals(constraintValidator.validator);
    }

    public void checkPermittedDN(ASN1Sequence dns)
        throws PKIXNameConstraintValidatorException
    {
        try
        {
            this.validator.checkPermittedDN(X500Name.getInstance(dns));
        }
        catch (NameConstraintValidatorException e)
        {
            throw new PKIXNameConstraintValidatorException(e.getMessage(), e);
        }
    }

    public void checkExcludedDN(ASN1Sequence dns)
        throws PKIXNameConstraintValidatorException
    {
        try
        {
            this.validator.checkExcludedDN(X500Name.getInstance(dns));
        }
        catch (NameConstraintValidatorException e)
        {
            throw new PKIXNameConstraintValidatorException(e.getMessage(), e);
        }
    }

    /**
     * Checks if the given GeneralName is in the permitted set.
     *
     * @param name The GeneralName
     * @throws PKIXNameConstraintValidatorException
     *          If the name
     */
    public void checkPermitted(GeneralName name)
        throws PKIXNameConstraintValidatorException
    {
        try
        {
            validator.checkPermitted(name);
        }
        catch (NameConstraintValidatorException e)
        {
            throw new PKIXNameConstraintValidatorException(e.getMessage(), e);
        }
    }

    /**
     * Check if the given GeneralName is contained in the excluded set.
     *
     * @param name The GeneralName.
     * @throws PKIXNameConstraintValidatorException
     *          If the name is
     *          excluded.
     */
    public void checkExcluded(GeneralName name)
        throws PKIXNameConstraintValidatorException
    {
        try
        {
            validator.checkExcluded(name);
        }
        catch (NameConstraintValidatorException e)
        {
            throw new PKIXNameConstraintValidatorException(e.getMessage(), e);
        }
    }

    public void intersectPermittedSubtree(GeneralSubtree permitted)
    {
        validator.intersectPermittedSubtree(permitted);
    }

    /**
     * Updates the permitted set of these name constraints with the intersection
     * with the given subtree.
     *
     * @param permitted The permitted subtrees
     */

    public void intersectPermittedSubtree(GeneralSubtree[] permitted)
    {
        validator.intersectPermittedSubtree(permitted);
    }

    public void intersectEmptyPermittedSubtree(int nameType)
    {
        validator.intersectEmptyPermittedSubtree(nameType);
    }
    
    /**                                                           
     * Adds a subtree to the excluded set of these name constraints.
     *
     * @param subtree A subtree with an excluded GeneralName.
     */
    public void addExcludedSubtree(GeneralSubtree subtree)
    {
        validator.addExcludedSubtree(subtree);
    }

    public String toString()
    {
        return validator.toString();
    }
}