@Entity
@Table( name = "Cars" )
class Car
{
	@Id
	@GeneratedValue( strategy = GenerationType.SEQUENCE )
	@Column( name = "id" )
	public int id;

	@Column( name = "number" )
	public String number;

	@OneToMany( mappedBy = "car" )
	public Set<Driver> drivers;
}

@Entity
@Table( name = "Drivers" )
class Driver
{
	@Id
	@GeneratedValue( strategy = GenerationType.SEQUENCE )
	@Column( name = "id" )
	public int id;

	@Column( name = "name" )
	public String name;

	@ManyToOne
	public Car car;
}

@Entity
@Table( name = "Columns" )
public class FileColumn implements Serializable
{
	private int id;
	private int position;
	private String title;
	private DataType type;

	@ManyToOne
	private File file;

	@Id
	@SequenceGenerator( name = "pk_columns", sequenceName = "columns_id_seq" )
	@GeneratedValue( strategy = GenerationType.SEQUENCE, generator = "pk_columns" )
	@Column( name = "id" )
	public int getId()
	{
		return id;
	}

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


	@Column( name = "position" )
	public int getPosition()
	{
		return position;
	}

	public void setPosition( int position )
	{
		this.position = position;
	}


	@Column( name = "title" )
	public String getTitle()
	{
		return title;
	}

	public void setTitle( String title )
	{
		this.title = title;
	}


	@Column( name = "type" )
	public DataType getType()
	{
		return type;
	}

	public void setType( DataType type )
	{
		this.type = type;
	}

	public File getFile()
	{
		return file;
	}

	public void setFile( File file )
	{
		this.file = file;
	}
}


@Entity
@Table( name = "Files" )
public class File implements Serializable
{
	private int id;
	private String URI;
	private String delimiter;
	private boolean isTitle;
	private int colCount;

	@OneToMany( mappedBy = "file", fetch = FetchType.EAGER )
	private Set<FileColumn> columns;

	@Id
	@SequenceGenerator( name = "pk_files", sequenceName = "files_id_seq" )
	@GeneratedValue( strategy = GenerationType.SEQUENCE, generator = "pk_files" )
	@Column( name = "id" )
	public int getId()
	{
		return id;
	}

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


	@Column( name = "URI" )
	public String getURI()
	{
		return URI;
	}

	public void setURI( String URI )
	{
		this.URI = URI;
	}


	@Column( name = "delimiter" )
	public String getDelimiter()
	{
		return delimiter;
	}

	public void setDelimiter( String delimiter )
	{
		this.delimiter = delimiter;
	}


	@Column( name = "is_title")
	public boolean isTitle()
	{
		return isTitle;
	}

	public void setTitle( boolean title )
	{
		isTitle = title;
	}

	@Column( name = "col_count" )
	public int getColCount()
	{
		return colCount;
	}

	public void setColCount( int colCount )
	{
		this.colCount = colCount;
	}

	public Set<FileColumn> getColumns()
	{
		return columns;
	}

	public void setColumns( Set<FileColumn> columns )
	{
		this.columns = columns;
	}
}

        @ManyToOne
	public File getFile()
	{
		return file;
	}

        @OneToMany( mappedBy = "file", fetch = FetchType.EAGER )
	public Set<FileColumn> getColumns()
	{
		return columns;
	}

    <groupId>com.bs.amg</groupId>
    <artifactId>Unis</artifactId>
    <version>1.0-SNAPSHOT</version>
	<modules>
		<module>CSV</module>
		<module>CSV_Client</module>
	</modules>
	<packaging>pom</packaging>

    <name>Unis</name>

    <properties>
        <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>6.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

     <dependency>
         <groupId>org.hibernate.javax.persistence</groupId>
         <artifactId>hibernate-jpa-2.0-api</artifactId>
         <scope>provided</scope>
      </dependency>

<packaging>pom</packaging>