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Author Message
 Post subject: Mapping Exception for HashMap when using Annotations
PostPosted: Thu Dec 22, 2011 3:48 pm 
Newbie

Joined: Thu Dec 22, 2011 3:34 pm
Posts: 1
Here's the code.

Code:
package ch7;

import java.util.HashMap;
import java.util.Map;
import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;


@Entity
public class Account {
    private String name;
    private String address;
    private String telephone;
    private String creditCardNumber;
   

    private Map<String, Integer> items = new HashMap<String, Integer>();
   
   
    private Long id;
   
    public Account() {
       
    }

    @ElementCollection
    public Map<String, Integer> getItems() {
        return items;
    }

    public void setItems(Map<String, Integer> items) {
        this.items = items;
    }

    @Id
    @GeneratedValue
    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String Name) {
        this.name = Name;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getTelephone() {
        return telephone;
    }

    public void setTelephone(String telephone) {
        this.telephone = telephone;
    }

    public String getCreditCardNumber() {
        return creditCardNumber;
    }

    public void setCreditCardNumber(String creditCardNumber) {
        this.creditCardNumber = creditCardNumber;
    }
}


Here's the stacktrace

Code:
org.hibernate.MappingException: Could not determine type for: java.util.Map, for columns: [org.hibernate.mapping.Column(items)]
   org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:266)
   org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:253)
   org.hibernate.mapping.Property.isValid(Property.java:185)
   org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:440)
   org.hibernate.mapping.RootClass.validate(RootClass.java:192)
   org.hibernate.cfg.Configuration.validate(Configuration.java:1102)
   org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1287)
   org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859)
   shared.HibernateHelper.createFactory(HibernateHelper.java:176)
   shared.HibernateHelper.createTable(HibernateHelper.java:149)
   shared.HibernateHelper.createTable(HibernateHelper.java:155)
   ch7.CartController.init(CartController.java:28)
   javax.servlet.GenericServlet.init(GenericServlet.java:160)
   org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:498)
   org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
   org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
   org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:394)
   org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
   org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
   org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166)
   org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
   java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
   java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
   java.lang.Thread.run(Thread.java:619)


I've read the Documentation closely and adding @ElementCollection seems to be all I should need to do here. I'm also using netbeans and read that there was a bug that you needed to make sure you were using hibernate > 3.5 so created a new Persistence Unit to do this but I hasn't changed anything. I've also tried moving the annotations from getters to the fields but this didn't make any difference either. What is it I'm missing?


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