java - Jackson doesn't deserialize -

i struggling deserializing jackson fasterxml. guess there type information , polymorphic use. tried different things after reading jackson docs , this still not manage it. serialization goes deserializing produced string not make it.

thanks in advance help

here classes :

   @jsontypeinfo(use = jsontypeinfo.id.class, include = jsontypeinfo.as.property, property = "@class")   private class dynreachslotinternalrep {      @jsontypeinfo(use = jsontypeinfo.id.class, include = jsontypeinfo.as.property, property = "@class")      private class liststartstop extends mergeablelinkedlist<dyntimeslot> {         private static final long serialversionuid = 1l;     }       private liststartstop[] weekrep = new liststartstop[7];      @suppresswarnings("unused")     public liststartstop[] getweekrep() {         return weekrep;     }      @suppresswarnings("unused")     public void setweekrep(liststartstop[] weekrep) {         this.weekrep = weekrep;     }      public dynreachslotinternalrep() {         super();      } /...    @jsontypeinfo(use = jsontypeinfo.id.class, include = jsontypeinfo.as.property, property = "@class") public class dyntimeslot extends intervalcomparison<dyntimeslot> {  private int starthour; private int startminute; private int stophour; private int stopminute;   public int getstarthour() {     return starthour; }  public void setstarthour(int starthour) {     this.starthour = starthour; }  public int getstartminute() {     return startminute; }  public void setstartminute(int startminute) {     this.startminute = startminute; }  public int getstophour() {     return stophour; }  public void setstophour(int stophour) {     this.stophour = stophour; }  public int getstopminute() {     return stopminute; }  public void setstopminute(int stopminute) {     this.stopminute = stopminute; }  public dyntimeslot(int starthour, int startminute, int stophour, int stopminute) {     super();     if ((stophour < starthour) || ((stophour == starthour) && (startminute > stopminute)))         throw new runtimeexception("malformed timeslot");      this.starthour = starthour;     this.startminute = startminute;     this.stophour = stophour;     this.stopminute = stopminute; }  public dyntimeslot() {     super();  }  /...  @jsontypeinfo(use=jsontypeinfo.id.class, include=jsontypeinfo.as.property, property="@class") public class mergeablelinkedlist<a extends intervalcomparison<a>>  extends linkedlist<a> {  /**  *   */ private static final long serialversionuid = 1l;  public mergeablelinkedlist() {     super();     }   public void insert(a toinsert) {     recursiveinsert(toinsert, this.listiterator()); }  public void delete (a todelete) {     recursivedelete(todelete, this.listiterator()); } 

here stack trace :

com.fasterxml.jackson.databind.jsonmappingexception: no suitable constructor found type [simple type, class com.dynamease.entity.dynreachslot$dynreachslotinternalrep]: can not instantiate json object (need add/enable type information?) @ [source: java.io.stringreader@277b65b1; line: 1, column: 70] @ com.fasterxml.jackson.databind.jsonmappingexception.from(jsonmappingexception.java:164) @ com.fasterxml.jackson.databind.deser.beandeserializerbase.deserializefromobjectusingnondefault(beandeserializerbase.java:984) @ com.fasterxml.jackson.databind.deser.beandeserializer.deserializefromobject(beandeserializer.java:276) @ com.fasterxml.jackson.databind.deser.beandeserializer._deserializeother(beandeserializer.java:157) @ com.fasterxml.jackson.databind.deser.beandeserializer.deserialize(beandeserializer.java:123) @ com.fasterxml.jackson.databind.jsontype.impl.aspropertytypedeserializer._deserializetypedforid(aspropertytypedeserializer.java:113) @ com.fasterxml.jackson.databind.jsontype.impl.aspropertytypedeserializer.deserializetypedfromobject(aspropertytypedeserializer.java:82) @ com.fasterxml.jackson.databind.deser.beandeserializerbase.deserializewithtype(beandeserializerbase.java:894) @ com.fasterxml.jackson.databind.deser.impl.typewrappeddeserializer.deserialize(typewrappeddeserializer.java:36) @ com.fasterxml.jackson.databind.objectmapper._readmapandclose(objectmapper.java:2888) @ com.fasterxml.jackson.databind.objectmapper.readvalue(objectmapper.java:2034) @ com.dynamease.entity.dynreachslot$dyntimeslotoperations.getfromdirectoryrepresentation(dynreachslot.java:145) @ com.dynamease.entity.dynreachslot.<init>(dynreachslot.java:53) @ com.dynamease.entity.dynreachslottest.test2(dynreachslottest.java:31) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:57) @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) @ java.lang.reflect.method.invoke(method.java:606) @ org.junit.runners.model.frameworkmethod$1.runreflectivecall(frameworkmethod.java:47) @ org.junit.internal.runners.model.reflectivecallable.run(reflectivecallable.java:12) @ org.junit.runners.model.frameworkmethod.invokeexplosively(frameworkmethod.java:44) @ org.junit.internal.runners.statements.invokemethod.evaluate(invokemethod.java:17) @ org.junit.runners.parentrunner.runleaf(parentrunner.java:271) @ org.junit.runners.blockjunit4classrunner.runchild(blockjunit4classrunner.java:70) @ org.junit.runners.blockjunit4classrunner.runchild(blockjunit4classrunner.java:50) @ org.junit.runners.parentrunner$3.run(parentrunner.java:238) @ org.junit.runners.parentrunner$1.schedule(parentrunner.java:63) @ org.junit.runners.parentrunner.runchildren(parentrunner.java:236) @ org.junit.runners.parentrunner.access$000(parentrunner.java:53) @ org.junit.runners.parentrunner$2.evaluate(parentrunner.java:229) @ org.junit.runners.parentrunner.run(parentrunner.java:309) @ org.eclipse.jdt.internal.junit4.runner.junit4testreference.run(junit4testreference.java:50) @ org.eclipse.jdt.internal.junit.runner.testexecution.run(testexecution.java:38) @ org.eclipse.jdt.internal.junit.runner.remotetestrunner.runtests(remotetestrunner.java:467) @ org.eclipse.jdt.internal.junit.runner.remotetestrunner.runtests(remotetestrunner.java:683) @ org.eclipse.jdt.internal.junit.runner.remotetestrunner.run(remotetestrunner.java:390) @ org.eclipse.jdt.internal.junit.runner.remotetestrunner.main(remotetestrunner.java:197) 

from you've posted, think you're missing jsoncreator() dynreachslotinternalrep class.

here's nice tutorial.