class Resource{

String[] keywords;

FROM Resource resource WHERE  keywords[0] like '%searchstring%'

@CollectionOfElements List<String> keywords

from Resource resource inner join resource.keywords keyword where keyword like '%abc%' and index(keyword)=0

@Entity
@Table(name = "Document")
public class Document implements Serializable
{
    @Id @GeneratedValue
    @Column(name = "Id")
    private Long id;

    @Column(name = "Name")
    private String name;

    @JoinTable(name = "Label", joinColumns = {@JoinColumn(name = "DocID")})
    @CollectionOfElements(targetElement = String.class)
    @Column(name = "Name")
    @IndexColumn(name = "Position")
    private String[] labels;

    public Long getId()
    {
        return id;
    }

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

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public String[] getLabels()
    {
        return labels;
    }

    public void setLabels(String[] labels)
    {
        this.labels = labels;
    }
}

public class Driver22
{
    public static void main(String[] args)
    {
        EntityManagerFactory emf = Persistence.createEntityManagerFactory("manager1");
        EntityManager em = emf.createEntityManager();

        em.getTransaction().begin();

        Query query = em.createQuery("select doc from Document doc where doc.labels[0] like '%Test'");

        List<Document> docs = query.getResultList();

        for (Document doc : docs)
        {
            System.out.println(">>> doc = " + doc.getName());
        }

        em.getTransaction().commit();

        em.close();
        emf.close();
    }