in java.lang">Object</a></pre>
<div class="block">This utility class is used by containers to communicate policy context
 identifiers and other policy relevant context to <code>Policy</code> 
 providers. <code>Policy</code> providers use the policy context identifier
 to select the subset of policy to apply in access decisions.
 <P>
 The value of a policy context identifier is a <code>
 String</code> and each thread has an independently 
 established policy context identifier. 
 A container will establish t