Group property into elasticsearch

Hi everyone,

I have a query in SQL like this:
Criteria crit = session.createCriteria(SignupLog.class);
if (start != null) {
crit.add(Restrictions.ge("reqDate", start));
}
if (finish != null) {
crit.add(Restrictions.le("reqDate", finish));
}
if (website != null) {
crit.add(Restrictions.eq("website", website));
}
if (org != null) {
crit.add(Restrictions.eq("organisation", org));
}
crit.setProjection(Projections.projectionList()
.add(Projections.min("reqDate"))
.add(Projections.rowCount())
.add(Projections.groupProperty("groupEntity"))
.add(Projections.groupProperty("reqYear"))
.add(Projections.groupProperty("reqMonth"))
.add(Projections.groupProperty("reqDay")));

And for now I want to do it by using elasticsearch? How can I do it?

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