Hello, I have next trouble:
in the of mapping class, hibernate create table:

CREATE
TABLE movie_media_asset
(
movie_id BIGINT NOT NULL,
promotrailers_id BIGINT NOT NULL,
previews_id BIGINT NOT NULL,
PRIMARY KEY (movie_id, previews_id),
CONSTRAINT fk519177e62df3f0da FOREIGN KEY (movie_id) REFERENCES public.movie (id),
CONSTRAINT fk519177e6892787b FOREIGN KEY (previews_id) REFERENCES public.media_asset (id),
CONSTRAINT fk519177e6e991c3f7 FOREIGN KEY (promotrailers_id) REFERENCES public.media_asset
(id),
UNIQUE (promotrailers_id),
UNIQUE (previews_id)
)

How I can this trouble get round??? Help me, please

Source code:

public class Movie extends implements java.io.Serializable
{

private java.util.Set < MediaAsset > previews = new java.util.TreeSet < MediaAsset >();
private java.util.Set < MediaAsset > promoTrailers = new java.util.TreeSet < MediaAsset > ();

// ------------- Relations ------------------

/**
* Get the previews Collection
*
* @return java.util.Set<MediaAsset>
*/
@javax.persistence.OneToMany(fetch = javax.persistence.FetchType.LAZY)
public java.util.Set < MediaAsset > getPreviews() {
return this.previews;
}

/**
* Set the previews
*
* @param previews
*/
public void setPreviews(java.util.Set < MediaAsset > previews) {
this.previews = previews;
}

/**
* Add MediaAsset
*
* @param mediaAsset
*/

public void addToPreviews(MediaAsset mediaAsset) {
if (mediaAsset == null)
return;
this.getPreviews().add(mediaAsset);
}

/**
* Remove MediaAsset
*
* @param mediaAsset
*/

public void removeFromPreviews(MediaAsset mediaAsset) {
if (mediaAsset == null)
return;
this.getPreviews().remove(mediaAsset);
}

/**
* Get the promoTrailers Collection
*
* @return java.util.Set<MediaAsset>
*/
@javax.persistence.OneToMany(fetch = javax.persistence.FetchType.LAZY)
public java.util.Set < MediaAsset > getPromoTrailers() {
return this.promoTrailers;
}

/**
* Set the promoTrailers
*
* @param promoTrailers
*/
public void setPromoTrailers(java.util.Set < MediaAsset > promoTrailers) {
this.promoTrailers = promoTrailers;
}

/**
* Add MediaAsset
*
* @param mediaAsset
*/

public void addToPromoTrailers(MediaAsset mediaAsset) {
if (mediaAsset == null)
return;
this.getPromoTrailers().add(mediaAsset);
}

/**
* Remove MediaAsset
*
* @param mediaAsset
*/

public void removeFromPromoTrailers(MediaAsset mediaAsset) {
if (mediaAsset == null)
return;
this.getPromoTrailers().remove(mediaAsset);
}
}

public class MediaAsset implements java.io.Serializable
{

private static final long serialVersionUID = 182342506630035664L;

// ----------- Attribute Definitions ------------

private java.lang.String fileName;
private java.lang.Long fileSize;
private java.lang.Long duration;

}

You forgot to describe what is your problem :D