</span></dt>
<dd><code><a href="http://download.oracle.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - If some aspect
              of the property is prevents it from being stored
              in the context</dd>
<dd><code><a href="http://download.oracle.com/javase/6/docs/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperation