DetachedCriteria criIndf = DetachedCriteria.forClass(ItemAItemB.class,"IAB");
ProjectionList p = Projections.projectionList();
p.add(Projections.property("IAB." + SceInrIdf.Fields.QUANTIDADE.toString()));
criIndf.setProjection(p);
      
criIndf.createAlias("IAB." + ItemAItemB.Fields.ItemA.toString(), "IA", Criteria.INNER_JOIN);
criIndf.createAlias("IA." + ItemA.Fields.A.toString(), "A", Criteria.INNER_JOIN);
criIndf.createAlias("IAB." + ItemAItemB.Fields.ItemB.toString(), "IB", Criteria.INNER_JOIN);
criIndf.createAlias("IB." + ItemB.Fields.B.toString(), "B", Criteria.INNER_JOIN);
      
criIndf.add(Restrictions.eqProperty("B." + B.Fields.SEQ.toString(),seqB));
criIndf.add(Restrictions.eqProperty("A." + A.Fields.SEQ.toString(),seqA));

SELECT this_.quantidade
FROM ItemAItemB this_
WHERE B.seq= seqB
AND A.seq = seqA

public class A implements Serializable {
   [...]

   @Id
   @SequenceGenerator(name="A_SEQ_GENERATOR", sequenceName="SCE_DFE_SQ1")
   @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="A_SEQ_GENERATOR")
   public Integer getSeq() {
      return this.seq;
   }

   [...]
   //bi-directional many-to-one association to ItemA
   @OneToMany(mappedBy="id.a")
   public Set<A> getA() {
      return this.a;
   }

}

public class ItemA implements Serializable {

   @EmbeddedId
   public ItemAId getId() {
      return this.id;
   }
}

@Embeddable
public class ItemAId implements Serializable {

   //bi-directional many-to-one association to A
   @ManyToOne
   @JoinColumn(name="dfs_seq")
   public A getA() {
      return this.a;
   }

   public Integer numero(){
      return this.numero;
   }

}

public class B implements Serializable {

   @Id
   @SequenceGenerator(name="B_SEQ_GENERATOR", sequenceName="SCE_NRS_SQ1")
   @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="B_SEQ_GENERATOR")
   public Integer getSeq() {
      return this.seq;
   }

   @OneToMany(mappedBy="id.b", cascade={CascadeType.ALL})
   public Set<ItemB> getItemB() {
      return itemB;
   }
}

public class ItemB implements Serializable {

   @EmbeddedId
   public ItemBId getId() {
      return this.id;
   }

   public Integer numero(){
      return this.numero;
   }
}

@Embeddable
public class ItemBId implements Serializable {

   //bi-directional many-to-one association to B
   @ManyToOne
   @JoinColumn(name="nrs_seq")
   public B getB() {
      return this.b;
   }

}

public class ItemAItemB implements Serializable {
   public Integer getQuantidade() {
      return this.quantidade;
   }

   @EmbeddedId
   public ItemAItemBId getId() {
      return this.id;
   }
}

@Embeddable
public class ItemAItemBId implements Serializable {

   //bi-directional many-to-one association to B
   @ManyToOne
   @JoinColumns({
      @JoinColumn(name="nrs_seq", referencedColumnName="iaf_afn_numero", nullable=false, insertable=false, updatable=false),
      @JoinColumn(name="b_numero", referencedColumnName="iaf_numero", nullable=false, insertable=false, updatable=false)
      })
   public ItemB getItemB() {
      return this.itemB;
   }

   //bi-directional many-to-one association to A
   @ManyToOne
   @JoinColumns({
      @JoinColumn(name="dfs_seq", referencedColumnName="iaf_afn_numero", nullable=false, insertable=false, updatable=false),
      @JoinColumn(name="a_numero", referencedColumnName="iaf_numero", nullable=false, insertable=false, updatable=false)
      })

   public A getA() {
      return this.a;
   }

}

public class ItemA implements Serializable {

   @EmbeddedId
   public ItemAId getId() {
      return this.id;
   }

   //bi-directional many-to-one association to A
   @ManyToOne(fetch=FetchType.LAZY)
   @JoinColumn(name="dfs_seq",insertable=false, updatable=false)
   public A getA() {
      return this.a;
   }
}

public class itemAId{

   [...]
   @Column(name="dfs_seq")
   public Integer getDfsSeq(){
      return this.dfsSeq;
   }

   [...]
   @Column(name="nrs_seq")
   public Integer getNrsSeq(){
      return this.nrsSeq;
   }

}