Problem with many-to-many relation with zk+spring+hibernate

 Usertupe usert=new Usertype();
 usert.setNomusertype(usert.getNomusertype);
 usert.setRoleusertype(usert.getRoleusertype);

/**
 * EN: Model class for the <b>Security Right</b>.<br>
 * DE: Model Klasse fuer die <b>Zugriffsschutz Einzelrechte</b>.<br>
 * 
 * @author bbruhns
 * @author Stephan Gerth
 */
public class SecurityRight implements java.io.Serializable, Entity {

	private static final long serialVersionUID = 1L;

	private long id = Long.MIN_VALUE;
	private int version;
	private Integer rightType;
	private String shorttext;
	private String longtext;
	private String vendor;
	private boolean systemRight = false;
	private Set<SecurityGroupright> securityGrouprights = new HashSet<SecurityGroupright>(0);

	@Override
	public boolean isNew() {
		return (getId() == Long.MIN_VALUE);
	}

	public SecurityRight() {
	}

	public SecurityRight(long id, String shorttext, String vendor, boolean systemRight) {
		this.id = id;
		this.shorttext = shorttext;
		this.vendor = vendor;
		this.systemRight = systemRight;
	}

	public SecurityRight(long id, Integer rightType, String shorttext, String longtext, String vendor, boolean systemRight, Set<SecurityGroupright> securityGrouprights) {
		this.id = id;
		this.rightType = rightType;
		this.shorttext = shorttext;
		this.longtext = longtext;
		this.vendor = vendor;
		this.systemRight = systemRight;
		this.securityGrouprights = securityGrouprights;
	}

	@Override
	public void setId(long id) {
		this.id = id;
	}

	@Override
	public long getId() {
		return id;
	}

	public int getVersion() {
		return this.version;
	}

	public void setVersion(int version) {
		this.version = version;
	}

	public void setRightType(Integer rightType) {
		this.rightType = rightType;
	}

	public Integer getRightType() {
		return rightType;
	}

	public void setShorttext(String shorttext) {
		this.shorttext = shorttext;
	}

	public String getShorttext() {
		return shorttext;
	}

	public void setLongtext(String longtext) {
		this.longtext = longtext;
	}

	public String getLongtext() {
		return longtext;
	}

	public void setVendor(String vendor) {
		this.vendor = vendor;
	}

	public String getVendor() {
		return vendor;
	}

	public void setSystemRight(boolean systemRight) {
		this.systemRight = systemRight;
	}

	public boolean isSystemRight() {
		return systemRight;
	}

	public Set<SecurityGroupright> getSecurityGrouprights() {
		return this.securityGrouprights;
	}

	public void setSecurityGrouprights(Set<SecurityGroupright> securityGrouprights) {
		this.securityGrouprights = securityGrouprights;
	}

	@Override
	public int hashCode() {
		return Long.valueOf(getId()).hashCode();
	}

	public boolean equals(SecurityRight secRight) {
		return getId() == secRight.getId();
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}

		if (obj instanceof SecurityRight) {
			SecurityRight secRight = (SecurityRight) obj;
			return equals(secRight);
		}

		return false;
	}

	public String toString() {

		StringBuilder builder = new StringBuilder();
		builder.append("SecurityRight [id=");
		builder.append(getId());
		builder.append(", shorttext=");
		builder.append(getShorttext());
		builder.append(", vendor=");
		builder.append(getVendor());
		builder.append("]");

		return builder.toString();
	}
}

/**
 * EN: Model class for the <b>Security Group</b>.<br>
 * DE: Model Klasse fuer die <b>Zugriffsschutz Gruppen</b>.<br>
 * 
 * @author bbruhns
 * @author Stephan Gerth
 */
public class SecurityGroup implements java.io.Serializable, Entity {

	private static final long serialVersionUID = 1L;

	private long id = Long.MIN_VALUE;
	private int version;
	private String shorttext;
	private String longtext;
	private String vendor;
	private boolean systemGroup = false;
	private Set<SecurityGroupright> securityGrouprights = new HashSet<SecurityGroupright>(0);
	private Set<SecurityRolegroup> securityRolegroups = new HashSet<SecurityRolegroup>(0);

	@Override
	public boolean isNew() {
		return (getId() == Long.MIN_VALUE);
	}

	public SecurityGroup() {
	}

	public SecurityGroup(long id, String shorttext, String vendor, boolean systemGroup) {
		this.id = id;
		this.shorttext = shorttext;
		this.vendor = vendor;
		this.systemGroup = systemGroup;
	}

	public SecurityGroup(long id, String shorttext, String longtext, String vendor, boolean systemGroup, Set<SecurityGroupright> securityGrouprights, Set<SecurityRolegroup> securityRolegroups) {
		this.id = id;
		this.shorttext = shorttext;
		this.longtext = longtext;
		this.vendor = vendor;
		this.systemGroup = systemGroup;
		this.securityGrouprights = securityGrouprights;
		this.securityRolegroups = securityRolegroups;
	}

	@Override
	public void setId(long id) {
		this.id = id;
	}

	@Override
	public long getId() {
		return id;
	}

	public int getVersion() {
		return this.version;
	}

	public void setVersion(int version) {
		this.version = version;
	}

	public void setShorttext(String shorttext) {
		this.shorttext = shorttext;
	}

	public String getShorttext() {
		return shorttext;
	}

	public void setLongtext(String longtext) {
		this.longtext = longtext;
	}

	public String getLongtext() {
		return longtext;
	}

	public void setVendor(String vendor) {
		this.vendor = vendor;
	}

	public String getVendor() {
		return vendor;
	}

	public void setSystemGroup(boolean systemGroup) {
		this.systemGroup = systemGroup;
	}

	public boolean isSystemGroup() {
		return systemGroup;
	}

	public Set<SecurityGroupright> getSecurityGrouprights() {
		return this.securityGrouprights;
	}

	public void setSecurityGrouprights(Set<SecurityGroupright> securityGrouprights) {
		this.securityGrouprights = securityGrouprights;
	}

	public Set<SecurityRolegroup> getSecurityRolegroups() {
		return this.securityRolegroups;
	}

	public void setSecurityRolegroups(Set<SecurityRolegroup> securityRolegroups) {
		this.securityRolegroups = securityRolegroups;
	}

	@Override
	public int hashCode() {
		return Long.valueOf(getId()).hashCode();
	}

	public boolean equals(SecurityGroup securityGroup) {
		return getId() == securityGroup.getId();
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}

		if (obj instanceof SecurityGroup) {
			SecurityGroup securityGroup = (SecurityGroup) obj;
			return equals(securityGroup);
		}

		return false;
	}

	public String toString() {

		StringBuilder builder = new StringBuilder();
		builder.append("SecurityGroup [id=");
		builder.append(getId());
		builder.append(", shorttext=");
		builder.append(getShorttext());
		builder.append(", vendor=");
		builder.append(getVendor());
		builder.append("]");

		return builder.toString();
	}

}

/**
 * EN: Model class for <b>Security Groupright</b>.<br>
 * DE: Model Klasse fuer die <b>Zugriffsschutz GruppenRechte</b>.<br>
 * 
 * @author bbruhns
 * @author Stephan Gerth
 */
public class SecurityGroupright implements java.io.Serializable, Entity {

	private static final long serialVersionUID = 1L;

	private long id = Long.MIN_VALUE;
	private int version;
	private SecurityGroup securityGroup;
	private SecurityRight securityRight;

	@Override
	public boolean isNew() {
		return (getId() == Long.MIN_VALUE);
	}

	public SecurityGroupright() {
	}

	public SecurityGroupright(long id, SecurityGroup securityGroup, SecurityRight securityRight) {
		this.setId(id);
		this.securityGroup = securityGroup;
		this.securityRight = securityRight;
	}

	@Override
	public void setId(long id) {
		this.id = id;
	}

	@Override
	public long getId() {
		return id;
	}

	public int getVersion() {
		return this.version;
	}

	public void setVersion(int version) {
		this.version = version;
	}

	public SecurityGroup getSecurityGroup() {
		return this.securityGroup;
	}

	public void setSecurityGroup(SecurityGroup securityGroup) {
		this.securityGroup = securityGroup;
	}

	public SecurityRight getSecurityRight() {
		return this.securityRight;
	}

	public void setSecurityRight(SecurityRight securityRight) {
		this.securityRight = securityRight;
	}

	@Override
	public int hashCode() {
		return Long.valueOf(getId()).hashCode();
	}

	public boolean equals(SecurityGroupright secGroupright) {
		return getId() == secGroupright.getId();
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}

		if (obj instanceof SecurityGroupright) {
			SecurityGroupright secGroupright = (SecurityGroupright) obj;
			return equals(secGroupright);
		}

		return false;
	}

	public String toString() {

		StringBuilder builder = new StringBuilder();
		builder.append("SecurityGroupright [id=");
		builder.append(getId());
		builder.append("]");

		return builder.toString();
	}

}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

	<class name="org.opentruuls.backend.user.model.SecurityGroup"
		schema="oikarus_user" table="sec_group">

		<id name="id" type="long">
			<column name="grp_id" />
			<generator class="sequence">
				<param name="sequence">sec_group_seq</param>
			</generator>
		</id>

		<version name="version" column="VERSION" type="integer" />

		<property name="shorttext" type="string">
			<column name="grp_shorttext" length="40" not-null="true"
				unique="true" />
		</property>
		<property name="longtext" type="string">
			<column name="grp_longtext" length="300" />
		</property>
		<property name="vendor" type="string">
			<column name="grp_vendor" length="20" not-null="true" />
		</property>
		<property name="systemGroup" type="boolean">
			<column name="grp_system" not-null="true" />
		</property>

		<set name="securityGrouprights" table="sec_groupright" inverse="true"
			lazy="true" fetch="select">
			<key>
				<column name="grp_id" not-null="true" />
			</key>
			<one-to-many class="org.opentruuls.backend.user.model.SecurityGroupright" />
		</set>
		<set name="securityRolegroups" table="sec_rolegroup" inverse="true"
			lazy="true" fetch="select">
			<key>
				<column name="grp_id" not-null="true" />
			</key>
			<one-to-many class="org.opentruuls.backend.user.model.SecurityRolegroup" />
		</set>
	</class>

	<query name="allGroupsForUserSqlQuery">
		SELECT distinct g FROM SecurityGroup g
		JOIN
		g.securityRolegroups
		AS rg
		JOIN rg.securityRole.securityUserroles AS ur
		JOIN
		ur.user AS u
		WHERE u.id = ?
	</query>
</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

	<class name="org.opentruuls.backend.user.model.SecurityRight"
		table="sec_right">

		<!--
			<id name="id" type="long"> <column name="rig_id" /> <generator
			class="assigned" /> </id>
		-->

		<id name="id" type="long">
			<column name="rig_id" />
			<generator class="sequence">
				<param name="sequence">sec_right_seq</param>
			</generator>
		</id>

		<version name="version" column="VERSION" type="integer" />

		<property name="rightType" type="java.lang.Integer">
			<column name="rig_type" />
		</property>
		<property name="shorttext" type="string">
			<column name="rig_shorttext" length="50" not-null="true"
				unique="true" />
		</property>
		<property name="longtext" type="string">
			<column name="rig_longtext" length="300" />
		</property>
		<property name="vendor" type="string">
			<column name="rig_vendor" length="20" not-null="true" />
		</property>
		<property name="systemRight" type="boolean">
			<column name="rig_system" not-null="true" />
		</property>

		<set name="securityGrouprights" table="sec_groupright" inverse="true"
			lazy="true" fetch="select">
			<key>
				<column name="rig_id" not-null="true" />
			</key>
			<one-to-many class="org.opentruuls.backend.user.model.SecurityGroupright" />
		</set>
	</class>

	<query name="allRightsForUserSqlQuery">
		SELECT distinct r FROM SecurityRight r
		JOIN
		r.securityGrouprights AS gr
		JOIN gr.securityGroup.securityRolegroups AS
		rg
		JOIN
		rg.securityRole.securityUserroles AS ur
		JOIN ur.user AS u
		WHERE
		u.id = ?
	</query>

</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

	<class name="org.opentruuls.backend.user.model.SecurityGroupright"
		table="sec_groupright">

		<id name="id" type="long">
			<column name="gri_id" />
			<generator class="sequence">
				<param name="sequence">sec_groupright_seq</param>
			</generator>
		</id>

		<version name="version" column="VERSION" type="integer" />

		<many-to-one name="securityGroup"
			class="org.opentruuls.backend.user.model.SecurityGroup" fetch="select">
			<column name="grp_id" not-null="true" />
		</many-to-one>
		<many-to-one name="securityRight"
			class="org.opentruuls.backend.user.model.SecurityRight" fetch="select">
			<column name="rig_id" not-null="true" />
		</many-to-one>
	</class>
</hibernate-mapping>

	@SuppressWarnings("unchecked")
	@Override
	public SecurityGroupright getGroupRightByGroupAndRight(SecurityGroup aGroup, SecurityRight aRight) {
		DetachedCriteria criteria = DetachedCriteria.forClass(SecurityGroupright.class);
		criteria.add(Restrictions.eq("securityGroup", aGroup));
		criteria.add(Restrictions.eq("securityRight", aRight));

		return (SecurityGroupright) DataAccessUtils.uniqueResult(getHibernateTemplate().findByCriteria(criteria));
	}

	@SuppressWarnings("unchecked")
	@Override
	public List<SecurityGroupright> getGroupRightsByGroup(SecurityGroup aGroup) {
		DetachedCriteria criteria = DetachedCriteria.forClass(SecurityGroupright.class);
		criteria.add(Restrictions.eq("securityGroup", aGroup));

		return getHibernateTemplate().findByCriteria(criteria);
	}

	@Override
	public boolean isRightInGroup(SecurityRight aRight, SecurityGroup aGroup) {
		DetachedCriteria criteria = DetachedCriteria.forClass(SecurityGroupright.class);
		criteria.add(Restrictions.eq("securityGroup", aGroup));
		criteria.add(Restrictions.eq("securityRight", aRight));
		criteria.setProjection(Projections.rowCount());

		int count = DataAccessUtils.intResult(getHibernateTemplate().findByCriteria(criteria));
		return count > 0;
	}