public String getEngine() {
        return this.engine;
    }
<p>
The database engine to use for the new instance.
</p>
<p>
This setting doesn't apply to RDS Custom.
</p>
<p>
Default: The same as source
</p>
<p>
Constraint: Must be compatible with the engine of the source. For example, you can restore a MariaDB 10.1 DB
instance from a MySQL 5.6 snapshot.
</p>
<p>
Valid Values:
</p>
<ul>
<li>
<p>
<code>db2-ae</code>
</p>
</li>
<li>
<p>
<code>db2-se</code>
</p>
</li>
<li>
<p>
<code>mariadb</code>
</p>
</li>
<li>
<p>
<code>mysql</code>
</p>
</li>
<li>
<p>
<code>oracle-ee</code>
</p>
</li>
<li>
<p>
<code>oracle-ee-cdb</code>
</p>
</li>
<li>
<p>
<code>oracle-se2</code>
</p>
</li>
<li>
<p>
<code>oracle-se2-cdb</code>
</p>
</li>
<li>
<p>
<code>postgres</code>
</p>
</li>
<li>
<p>
<code>sqlserver-ee</code>
</p>
</li>
<li>
<p>
<code>sqlserver-se</code>
</p>
</li>
<li>
<p>
<code>sqlserver-ex</code>
</p>
</li>
<li>
<p>
<code>sqlserver-web</code>
</p>
</li>
</ul>

@return The database engine to use for the new instance.</p>
        <p>
        This setting doesn't apply to RDS Custom.
        </p>
        <p>
        Default: The same as source
        </p>
        <p>
        Constraint: Must be compatible with the engine of the source. For example, you can restore a MariaDB 10.1
        DB instance from a MySQL 5.6 snapshot.
        </p>
        <p>
        Valid Values:
        </p>
        <ul>
        <li>
        <p>
        <code>db2-ae</code>
        </p>
        </li>
        <li>
        <p>
        <code>db2-se</code>
        </p>
        </li>
        <li>
        <p>
        <code>mariadb</code>
        </p>
        </li>
        <li>
        <p>
        <code>mysql</code>
        </p>
        </li>
        <li>
        <p>
        <code>oracle-ee</code>
        </p>
        </li>
        <li>
        <p>
        <code>oracle-ee-cdb</code>
        </p>
        </li>
        <li>
        <p>
        <code>oracle-se2</code>
        </p>
        </li>
        <li>
        <p>
        <code>oracle-se2-cdb</code>
        </p>
        </li>
        <li>
        <p>
        <code>postgres</code>
        </p>
        </li>
        <li>
        <p>
        <code>sqlserver-ee</code>
        </p>
        </li>
        <li>
        <p>
        <code>sqlserver-se</code>
        </p>
        </li>
        <li>
        <p>
        <code>sqlserver-ex</code>
        </p>
        </li>
        <li>
        <p>
        <code>sqlserver-web</code>
        </p>
        </li>
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/RestoreDBInstanceFromDBSnapshotRequest.java