public class SharedDocDetail
{
   private long PK_ID;//----------primary key
   private String did;
   private String dDocName;
   private SharedTrackingDetails sharedTrkDeatils;


   public String getdDocName()
      {
      return dDocName;
      }

   public long getPK_ID()
       {
       return PK_ID;
       }

   public void setPK_ID(long pK_ID)
       {
       PK_ID = pK_ID;
       }

   public void setdDocName(String dDocName)
      {
      this.dDocName = dDocName;
      }

   public String getDid()
      {
      return did;
      }

   public void setDid(String did)
      {
      this.did = did;
      }

   public SharedTrackingDetails getSharedTrkDeatils()
      {
      return sharedTrkDeatils;
      }

   public void setSharedTrkDeatils(SharedTrackingDetails sharedTrkDeatils)
      {
      this.sharedTrkDeatils = sharedTrkDeatils;
      }







}

import java.util.Date;
import java.util.Set;

public class SharedTrackingDetails
{
   private long SHARED_ID;//---------------primary key
   private String sharedBy;
   private String sharedTo;
   private Date startDate;
   private Date endDate;
   private Date requestedDate;
   private Set<SharedDocDetail> documentIdSet;

   public long getSHARED_ID()
      {
      return SHARED_ID;
      }

   public void setSHARED_ID(long sHARED_ID)
      {
      SHARED_ID = sHARED_ID;
      }

   public String getSharedBy()
      {
      return sharedBy;
      }

   public void setSharedBy(String sharedBy)
      {
      this.sharedBy = sharedBy;
      }

   public String getSharedTo()
      {
      return sharedTo;
      }

   public void setSharedTo(String sharedTo)
      {
      this.sharedTo = sharedTo;
      }

   public Date getStartDate()
      {
      return startDate;
      }

   public void setStartDate(Date startDate)
      {
      this.startDate = startDate;
      }

   public Date getEndDate()
      {
      return endDate;
      }

   public void setEndDate(Date endDate)
      {
      this.endDate = endDate;
      }

   public Date getRequestedDate()
      {
      return requestedDate;
      }

   public void setRequestedDate(Date requestedDate)
      {
      this.requestedDate = requestedDate;
      }

   public Set<SharedDocDetail> getDocumentIdSet()
      {
      return documentIdSet;
      }

   public void setDocumentIdSet(Set<SharedDocDetail> documentIdSet)
      {
      this.documentIdSet = documentIdSet;
      }

}

<?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="com.hds.dal.common.SharedDocDetail" table="SHAREDDOCUMENTDETAILS">
   
      <id name="PK_ID" type="long">
         <column name="PK_ID" />
         <generator class="sequence">
            <param name="sequence">SHAREDDOC_SEQ</param>
         </generator>
      </id>
      
      <property name="did" type="text">
         <column name="DOCUMENTID" not-null="false" />
      </property>
   
      <property name="dDocName" type="text">
         <column name="DDOCNAME" not-null="false" />
      </property>
      
       <many-to-one name="sharedTrkDeatils" class="com.hds.dal.common.SharedTrackingDetails" fetch="select">
            <column name="SHARED_ID" not-null="true" />
        </many-to-one>
      
   </class>
   
</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="com.hds.dal.common.SharedTrackingDetails" table="SHAREDTRACKINGDETAILS">
   
      <id name="SHARED_ID" type="long">
         <column name="SHARED_ID" />
         <generator class="sequence">
            <param name="sequence">SHAREDTRACKING_SEQ</param>
         </generator>
      </id>
      
      <set name="documentIdSet"  table = "com.hds.dal.common.SharedDocDetail" inverse="true" lazy="false" fetch="select">
              <key>
                <column name="SHARED_ID" not-null="true" />
            </key>
         <one-to-many class="com.hds.dal.common.SharedDocDetail" />
      </set>
      
      <property name="sharedBy" type="text">
         <column name="SHAREDBY" not-null="false" />
      </property>
      
      <property name="sharedTo" type="text">
         <column name="SHAREDTO" />
      </property>
      
      <property name="startDate" type="timestamp">
         <column name="STARTDATE" not-null="false" />
      </property>

      <property name="endDate" type="timestamp">
         <column name="ENDDATE" not-null="false" />
      </property>
      
      <property name="requestedDate" type="timestamp">
         <column name="REQUESTEDDATE" not-null="false" />
      </property>
      
   </class>
   
</hibernate-mapping>

    
      try{
          Session session = null;
         session = HibernateUtil.getSessionFactory().openSession();
      
      Query qry = session.createQuery("from " + shareddocumentdetails + " c  where  c.SHARED_ID=32");// throws error here
         System.out.println(qry);
         List result = qry.list();
         
       }
catch(Throwable e1)
   {
   System.out.println(e1);
   }