java - JPA entity mapping - linking the same entity -

-

i faced problem mapping same entity. entity represents tree node , assumes parent , child defined same entity:

id-class

@mappedsuperclass public class parentid {     @id     @generatedvalue(strategy = generationtype.auto)     @column(name = "id")     private long id;      public void setid(long id) {         this.id = id;     }     public long getid() {         return id;     } }

entity-class

@entity @table(name = "navigation_tree_node") public class navigationtreenode extends parentid {      @column(name = "node_name")     private string nodename;      @column(name = "node_type")     @enumerated(enumtype.ordinal)     private nodetype nodetype;      @manytoone(fetch = fetchtype.eager)     @joincolumn(name = "entity_id")     private navigationtreenode parent;      @onetomany(mappedby = "parent")     private list<navigationtreenode> children;      public string getnodename() {         return nodename;     }      public void setnodename(string nodename) {         this.nodename = nodename;     }      public nodetype getnodetype() {         return nodetype;     }      public void setnodetype(nodetype nodetype) {         this.nodetype = nodetype;     }      public void setparent(navigationtreenode parent) {         this.parent = parent;     }      public navigationtreenode getparent() {         return parent;     }      public void setchildren(list<navigationtreenode> children) {         this.children = children;     }      public list<navigationtreenode> getchildren() {         return children;     }      public enum nodetype {         root,         node,         leaf;          public string getname() {             return this.name();         }     } }

sql

create table "dev1"."navigation_tree_node"     (    "id" number not null enable,      "node_name" varchar2(30 byte),      "node_type" varchar2(20 byte),      "parent_id" number,      "entity_id" number,       primary key ("entity_id")   using index pctfree 10 initrans 2 maxtrans 255 compute statistics    storage(initial 65536 next 1048576 minextents 1 maxextents 2147483645   pctincrease 0 freelists 1 freelist groups 1 buffer_pool default flash_cache default cell_flash_cache default)   tablespace "system"  enable,       foreign key ("parent_id")       references "dev1"."navigation_tree_node" ("entity_id") enable    ) segment creation immediate    pctfree 10 pctused 40 initrans 1 maxtrans 255 nocompress logging   storage(initial 65536 next 1048576 minextents 1 maxextents 2147483645   pctincrease 0 freelists 1 freelist groups 1 buffer_pool default flash_cache default cell_flash_cache default)   tablespace "system" ;    create or replace trigger "dev1"."navigation_tree_node_trigger"    before insert on navigation_tree_node   each row begin   select dev1_seq.nextval   :new.id   dual; end;

when try compile following exception thrown:

caused by: java.sql.sqlexception: ora-17059 fail convert internal representation     @ oracle.jdbc.driver.charcommonaccessor.getint(charcommonaccessor.java:147)     @ oracle.jdbc.driver.t4cvarcharaccessor.getint(t4cvarcharaccessor.java:830)     @ oracle.jdbc.driver.oracleresultsetimpl.getint(oracleresultsetimpl.java:942)     @ oracle.jdbc.driver.oracleresultset.getint(oracleresultset.java:438)     @ org.hibernate.type.enumtype$ordinalenumvaluemapper.getvalue(enumtype.java:372)     @ org.hibernate.type.enumtype.nullsafeget(enumtype.java:107)     @ org.hibernate.type.customtype.nullsafeget(customtype.java:127)     @ org.hibernate.type.abstracttype.hydrate(abstracttype.java:106)     @ org.hibernate.persister.entity.abstractentitypersister.hydrate(abstractentitypersister.java:2969)     @ org.hibernate.loader.loader.loadfromresultset(loader.java:1696)     @ org.hibernate.loader.loader.instancenotyetloaded(loader.java:1628)     @ org.hibernate.loader.loader.getrow(loader.java:1515)     @ org.hibernate.loader.loader.getrowfromresultset(loader.java:726)     @ org.hibernate.loader.loader.processresultset(loader.java:953)     @ org.hibernate.loader.loader.doquery(loader.java:921)     @ org.hibernate.loader.loader.doqueryandinitializenonlazycollections(loader.java:355)     @ org.hibernate.loader.loader.dolist(loader.java:2554)     ... 35 more

could please how correct code? thanks.

you have 

@column(name = "node_type") @enumerated(enumtype.ordinal) // <-- number private nodetype nodetype;

but in sql it's

"node_type" varchar2(20 byte).

Comments

Post a Comment

Popular posts from this blog

javascript - Slick Slider width recalculation -

-
i'm trying add slide in panel on slick container css. carousel works except new width not being calculated when space has been added. recalibrate once advance next slide i'd happen each time panel opened or closed. i've tried adding both margin , padding, neither makes difference. ideas? https://jsfiddle.net/mhigley/dpf7mlpl/ html: <button type="button" id="button"><i class="fa fa-arrow-right"></i></button> <aside> <h2>slide in panel</h2> <ol> <li>list item</li> <li>list item</li> <li>list item</li> <li>list item</li> <li>list item</li> </ol> </aside> <main role="main"> <div class="sections"> <section> <article> <h2>first slide</h2> <p>lorem ipsum d...
Read more

jsf - PrimeFaces Datatable - What is f:facet actually doing? -

-
looking through primefaces code in app noticed following line: <f:facet name="header">#{trainsearch.traincount} trains</f:facet> it looks overriding header, makes sense, can explain me in little more detail? what happening line of code? complete code listed below: <p:datatable id = "results" value = "#{trainsearch.trains}" var = "train" rendered="#{not empty trainsearch.trains}" styleclass = "train-search-table horizontal-border"> <f:facet name="header">#{trainsearch.traincount} trains</f:facet> <p:column headertext = "train id"> <p:panelgrid columns="1" styleclass = "train-id-grid" layout = "grid"> <h:outputtext styleclass = "train-id-label" value="#{train.traini}"/> <h:outputtex...
Read more

angular2 services - Angular 2 RC 4 Http post not firing -

-
i trying fire post request app , it's not working, tried multiple ways. don't see request being fired under network tab in chrome. not sure problem is, appreciated. import { injectable } '@angular/core'; import { http, headers } '@angular/http'; @injectable() export class userservice{ private _url="users"; constructor(private _http: http){ } checkifusernameexists(username){ return this._http.get(this._url+"/"+username) .map(response => response.json()) } createuser(user){ let headers = new headers(); headers.append('content-type', 'application/json') console.log(json.stringify(user)); return this._http.post(this._url, json.stringify(user),{headers: headers}) .map(response => response.json()) } } first need capture error , solve error: this._http.post(this._url, json.stringify(user),{headers: headers}) .subscribe( ...
Read more