@@ -0,0 +1,460 @@
+package uk.ac.ebi.phenotype.dao;%0A%0Aimport java.sql.SQLException;%0Aimport java.util.List;%0Aimport java.util.Map;%0A%0Aimport uk.ac.ebi.phenotype.pojo.Population;%0A%0Apublic interface PopulationDAO extends HibernateDAO %7B%0A%0A%09public void deleteAllPopulations();%0A%09%0A%09public List%3CPopulation%3E getAllPopulations();%0A%0A%09public void savePopulation(Population population);%0A%09%0A%09public Map%3CString, String%3E getDateOfExperimentAndTypeByObservation(Integer oid) throws SQLException;%0A%09%0A%09%0A%09%0A%7D%0A

add method to get date of experiment by type and observation init commit