public void setCertificateIdentifier(String certificateIdentifier) {
        this.certificateIdentifier = certificateIdentifier;
    }
<p>
The user-supplied certificate identifier. If this parameter is specified, information for only the identified
certificate is returned. This parameter isn't case-sensitive.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
Must match an existing CertificateIdentifier.
</p>
</li>
</ul>

@param certificateIdentifier
       The user-supplied certificate identifier. If this parameter is specified, information for only the
       identified certificate is returned. This parameter isn't case-sensitive.</p>
       <p>
       Constraints:
       </p>
       <ul>
       <li>
       <p>
       Must match an existing CertificateIdentifier.
       </p>
       </li>
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/DescribeCertificatesRequest.java