if (cacheKeyExpr == null)
return null;
try {
final Serializable templateKey = (Serializable) cacheKeyExpr.getValue(this.expressionContext);
if (templateKey != null) {
return new JXCacheKey(this.startDocument.getUri(), templateKey);
}
} catch (Exception e) {
getLogger().error("error evaluating cache key", e);
}
return null;