tityTag.html" title="class in jakarta.ws.rs.core">EntityTag</a>&nbsp;eTag)</span></div>
<div class="block">Evaluate request preconditions based on the passed in value.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>lastModified</code> - a date that specifies the modification date of the resource</dd>
<dd><code>eTag</code> - an ETag for the current state of the resource</dd>
<dt>Returns:</dt>
<dd><code>null</code> if the preconditions are met or a <code>ResponseBuilder</code> set with the appropriat