java - JsonMappingException: Can not instantiate value of type from Integral number; no single-int-arg constructor/factory method -

i'm trying query data have in json tree on firebase. go ahead , create pojo keep getting jsonmappingexception: can not instantiate value of type [simple type, class net.rmoreno.ally.ally] integral number; no single-int-arg constructor/factory method error. i've made takes consideration string email keeps crashing , telling me problem integral number. how can fix this.

here code makes crash

query.addchildeventlistener(new childeventlistener() {         arraylist<ally> allyarraylist = new arraylist<>();         @override        public void onchildadded(datasnapshot datasnapshot, string s) {             for(datasnapshot usersnapshot: datasnapshot.getchildren()){                 ally information = usersnapshot.getvalue(ally.class);                 allyarraylist.add(information);        } } 

here pojo

@jsonignoreproperties({"latitude", "longitude","phone","availability","email"}) public class ally {      string name;     //string email;     //string phone;     //int availability;      public ally(){      }      public string getname(){         return name;     }  //    public string getemail(){ //        return email; //    }  //    public string getphone(){ //        return phone; //    }  //    public int getavailability(){ //        return availability; //    } } 

here stack track

 com.firebase.client.firebaseexception: failed bounce type             @ com.firebase.client.datasnapshot.getvalue(datasnapshot.java:185)             @ net.rmoreno.ally.mainactivity$1.onchildadded(mainactivity.java:46)             @ com.firebase.client.core.childeventregistration.fireevent(childeventregistration.java:58)             @ com.firebase.client.core.view.dataevent.fire(dataevent.java:45)             @ com.firebase.client.core.view.eventraiser$1.run(eventraiser.java:38)             @ android.os.handler.handlecallback(handler.java:739)             @ android.os.handler.dispatchmessage(handler.java:95)             @ android.os.looper.loop(looper.java:135)             @ android.app.activitythread.main(activitythread.java:5221)             @ java.lang.reflect.method.invoke(native method)             @ java.lang.reflect.method.invoke(method.java:372)             @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:899)             @ com.android.internal.os.zygoteinit.main(zygoteinit.java:694)      caused by: com.fasterxml.jackson.databind.jsonmappingexception: can not instantiate value of type [simple type, class net.rmoreno.ally.ally] integral number; no single-int-arg constructor/factory method             @ com.fasterxml.jackson.databind.deser.std.stdvalueinstantiator.createfromint(stdvalueinstantiator.java:320)             @ com.fasterxml.jackson.databind.deser.beandeserializerbase.deserializefromnumber(beandeserializerbase.java:1012)             @ com.fasterxml.jackson.databind.deser.beandeserializer._deserializeother(beandeserializer.java:138)             @ com.fasterxml.jackson.databind.deser.beandeserializer.deserialize(beandeserializer.java:123)             @ com.fasterxml.jackson.databind.objectmapper._readmapandclose(objectmapper.java:2888)             @ com.fasterxml.jackson.databind.objectmapper.readvalue(objectmapper.java:2034)             @ com.firebase.client.datasnapshot.getvalue(datasnapshot.java:183)             at net.rmoreno.ally.mainactivity$1.onchildadded(mainactivity.java:46)             at com.firebase.client.core.childeventregistration.fireevent(childeventregistration.java:58)             at com.firebase.client.core.view.dataevent.fire(dataevent.java:45)             at com.firebase.client.core.view.eventraiser$1.run(eventraiser.java:38)             at android.os.handler.handlecallback(handler.java:739)             at android.os.handler.dispatchmessage(handler.java:95)             at android.os.looper.loop(looper.java:135)             at android.app.activitythread.main(activitythread.java:5221)             at java.lang.reflect.method.invoke(native method)             at java.lang.reflect.method.invoke(method.java:372)             at com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:899)             at com.android.internal.os.zygoteinit.main(zygoteinit.java:694) 

edit: here json structure on firebase

in json have array , rest of fields availability, email , name etc. present inside array.

in ally class trying parse these inner objects directly.

what should doing instead follows:

here inner-object class:

@jsonignoreproperties({"latitude", "longitude","phone","availability","email"}) public class arrayobject {      private string name;     private string email;     private string phone;     private int availability;      public arrayobject() {}      public string getname() {         return name;     }      public string getemail() {         return email;     }      public string getphone() {         return phone;     }      public int getavailability() {         return availability;     } } 

here ally class:

public class ally {     private arrayobject arrobj;      /* getter-setters */      public ally() {} }