hibernate-mapping

I want to map a generic field in a superclass with Hibernate. My mother class is : @Entity @Table(name = "ParameterValue") @Inheritance(strategy = InheritanceType.SINGLE_TABLE) @DiscriminatorColumn(name = "parameterType", discriminatorType = DiscriminatorType.STRING) public abstract class ParameterValue<C> { private C value; /* HELP NEEDED HERE */ public C getValue() { return value; } public void setValue(C value) { this.value = value; } } One subclass : @Entity @DiscriminatorValue(value = "integer") @AttributeOverride(name = "value", column = @Column(name = "intValue")) public class

I want to store image into database using hibernate and Java. I am using postgres database I tried bytea data type to store image and byte[] data type in hibernate pojo. I used the following code, CREATE TABLE photo ( "photo_name" bytea ) WITH (OIDS=FALSE); ALTER TABLE photo OWNER TO postgres; Hibernate Pojo public class PhotoEntity { byte[] name; public byte[] getName() { return name; } public void setName(byte[] name) { this.name = name; } } but it gives error at time of mapping. please give me any reference to do this. Craig Ringer If you are using Hibernate via JPA2, you may need the @Lob

In my project I have entities for users and companies: @Entity @Table(name = "users") public class UserDetails { @Id @GeneratedValue @Column(name = "user_id") private int id; @Column(name = "first_name") @NotEmpty @Size(min = 2, max = 20) private String firstName; @ManyToMany(cascade = CascadeType.REFRESH) @JoinTable(name = "users_companies", joinColumns = @JoinColumn(name = "user_id"), inverseJoinColumns = @JoinColumn(name = "company_id")) private Set<CompanyDetails> userCompanies = new HashSet(); //getters and setters of course... } @Entity @Table(name = "companies") public class

I am using Hibernate 3.2.5 for my application. I have a Dept table and an Employees table. Dept.java private int deptId; private String deptName; private Map empMap = new HashMap(); //Getters and Setters Employees.java private int empId; private String empName; private int deptId; private int age; private String sex; private Dept dept; HBM Mapping file <class name="com.jdbc.Dept" table="dept"> <id name="deptId" type="integer" column="DEPT_ID"> <generator class="assigned"></generator> </id> <property name="deptName"> <column name="DEPT_NAME"></column> </property> <map name="empMap" inverse=

I have a basic Hibernate code, I have set the property "hibernate.hbm2ddl.auto" as update still it is not auto-creating the table in the Database. These are the required files: employee.hbm.xml <hibernate-mapping> <class name="contacts.employee" table="contacts"> <meta attribute="class-description"></meta> <id column="contactId" name="contactId" type="string"> <generator class="assigned"/> </id> <property column="contactName" length="100" name="contactName" not-null="true" type="string"/> <property column="password" length="100" name="password" not-null="true" type="string"/> <set cascade="all