Hi. I keep getting an error,
the code follows the error message. The problem seems to occur at
"★★★HERE".
after "List<GCalendar> calendars = (List<GCalendar>) query.execute();"
"calendars" is StreamingQueryResult object.
Does the error mean that I cannot cast this object to String or Date?
Could anyone help me? Thanks in advance.
soichi
//error message
java.lang.ClassCastException: java.lang.String cannot be cast to
java.util.Date
at com.soichi.rainbows.GCalendar.jdoReplaceField(GCalendar.java)
at com.soichi.rainbows.GCalendar.jdoReplaceFields(GCalendar.java)
at
org.datanucleus.state.JDOStateManagerImpl.replaceFields(JDOStateManagerImpl.java:
2772)
at
org.datanucleus.state.JDOStateManagerImpl.replaceFields(JDOStateManagerImpl.java:
2791)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.fetchObject(DatastorePersistenceHandler.java:
480)
at
org.datanucleus.store.appengine.query.DatastoreQuery.entityToPojo(DatastoreQuery.java:
565)
at
org.datanucleus.store.appengine.query.DatastoreQuery.entityToPojo(DatastoreQuery.java:
520)
at org.datanucleus.store.appengine.query.DatastoreQuery.access
$300(DatastoreQuery.java:110)
at org.datanucleus.store.appengine.query.DatastoreQuery
$6.apply(DatastoreQuery.java:638)
at org.datanucleus.store.appengine.query.DatastoreQuery
$6.apply(DatastoreQuery.java:630)
at
org.datanucleus.store.appengine.query.LazyResult.resolveNext(LazyResult.java:
94)
at
org.datanucleus.store.appengine.query.LazyResult.get(LazyResult.java:
81
...
//-------------------------------
//a part of the code that produces the error
Query query = pm.newQuery(GCalendar.class);
query.setOrdering("date desc");
List<GCalendar> calendars = (List<GCalendar>)
query.execute();
resp.setContentType("text/html");
resp.setCharacterEncoding("utf-8");
resp.getWriter().print(render(calendars));
//--------------------------------
private String render(List<GCalendar> calendars) {
StringBuffer sb = new StringBuffer();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
sb.append(head);
for (GCalendar calendar : calendars){ //
★★★HERE
String tmp = sdf.format(calendar.getDate());
sb.append(MessageFormat.format(memoTmpl, tmp,
calendar.getYoubi(), calendar.getTime(),
calendar.getNaiyou()));
}
sb.append(tail);
return sb.toString();
}
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