List<TemporalCoverage> timePeriods = resource.getTemporalCoverages();
for (TemporalCoverage timePeriod : timePeriods) {
if (timePeriod.getStart() != null)
distribution.incrementCount(String.valueOf(timePeriod.getStart().getYear()));
if (timePeriod.getEnd() != null)
distribution.incrementCount(String.valueOf(timePeriod.getEnd().getYear()));
}
}
return (buildPieGraphURL("DDMS%20Date%20Distribution", distribution, PIE_GRAPH));
}