hibernate - java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Calendar -

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i trying convert string calendar,but giving exception.

here code:-

public list<classa> getdata(string fromdatetime, string todatetime, integer apiid)             throws daoexception, parseexception {         calendar cal1 = calendar.getinstance();         calendar cal2 = calendar.getinstance();         dateformat df=new simpledateformat("yyyy-mm-dd hh:mm:ss");         cal1.settime(df.parse(fromdatetime));         cal2.settime(df.parse(todatetime)); return findbycriteria(restrictions.eq("apiid", apiid),                 restrictions.between("searchgenerationtime", fromdatetime, todatetime));        }

please can told me wrong in code ?? lets assume fromdatetime & todatetime user input 2014-04-02 19:24:43 & 2014-04-03 12:03:51 respectively. thanks.

edited:- here stack trace

java.lang.classcastexception: java.lang.string cannot cast java.util.calendar     @ org.hibernate.type.descriptor.java.calendartypedescriptor.unwrap(calendartypedescriptor.java:40)     @ org.hibernate.type.descriptor.sql.timestamptypedescriptor$1.dobind(timestamptypedescriptor.java:53)     @ org.hibernate.type.descriptor.sql.basicbinder.bind(basicbinder.java:91)     @ org.hibernate.type.abstractstandardbasictype.nullsafeset(abstractstandardbasictype.java:283)     @ org.hibernate.type.abstractstandardbasictype.nullsafeset(abstractstandardbasictype.java:278)     @ org.hibernate.loader.loader.bindpositionalparameters(loader.java:1873)     @ org.hibernate.loader.loader.bindparametervalues(loader.java:1844)     @ org.hibernate.loader.loader.preparequerystatement(loader.java:1716)     @ org.hibernate.loader.loader.doquery(loader.java:801)     @ org.hibernate.loader.loader.doqueryandinitializenonlazycollections(loader.java:274)     @ org.hibernate.loader.loader.dolist(loader.java:2542)     @ org.hibernate.loader.loader.listignorequerycache(loader.java:2276)     @ org.hibernate.loader.loader.list(loader.java:2271)     @ org.hibernate.loader.criteria.criterialoader.list(criterialoader.java:119)     @ org.hibernate.impl.sessionimpl.list(sessionimpl.java:1716)     @ org.hibernate.impl.criteriaimpl.list(criteriaimpl.java:347)     @ com.via.database.util.daoutil.findbycriteriainternal(daoutil.java:227)     @ com.via.database.util.daoutil.findbycriteria(daoutil.java:198)     @ com.via.database.dao.hibernate.generichibernatedao.findbycriteria(generichibernatedao.java:175)     @ com.eos.accounts.database.dao.hibernate.hotelsearcherrequestresponsedao.getdata(hotelsearcherrequestresponsedao.java:53)     @ com.eos.hotels.hotelsearcherutility.gethotelsearchrequestresopnsedata(hotelsearcherutility.java:50)     @ com.eos.b2c.ui.b2ccallcenternavigation.dogetextension(b2ccallcenternavigation.java:9568)     @ com.eos.b2c.ui.b2ccallcenternavigation.doget(b2ccallcenternavigation.java:5851)     @ javax.servlet.http.httpservlet.service(httpservlet.java:617)     @ javax.servlet.http.httpservlet.service(httpservlet.java:717)     @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:290)     @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:206)     @ com.eos.accounts.usermanagerfilter.dofilter(usermanagerfilter.java:972)     @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:235)     @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:206)     @ org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:233)     @ org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:191)     @ org.apache.catalina.authenticator.authenticatorbase.invoke(authenticatorbase.java:470)     @ org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:127)     @ org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:103)     @ org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:109)     @ org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:293)     @ org.apache.coyote.http11.http11processor.process(http11processor.java:861)     @ org.apache.coyote.http11.http11protocol$http11connectionhandler.process(http11protocol.java:606)     @ org.apache.tomcat.util.net.jioendpoint$worker.run(jioendpoint.java:489)     @ java.lang.thread.run(thread.java:701)

i think return statement should follows:

return findbycriteria(restrictions.eq("apiid", apiid),                restrictions.between("searchgenerationtime", cal1, cal2));

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