title: Creating queries using Criteria API (JPA 2.0)
body: <p>I'm trying to create a query with the Criteria API from JPA 2.0, but I can't make it work.</p>
  
  <p>The problem is with the "between" conditional method. I read <a href="http://docs.sun.com/app/docs/doc/820-7627/gjitv" rel="noreferrer">some documentation</a> to know how I have to do it, but since I'm discovering JPA, I don't understand why it does not work.</p>
  
  <p>First, I can't see "creationDate" which should appear when I write "Transaction_."</p>
  
  <p>I thought it was maybe normal, since I read the metamodel was generated at runtime, so I tried to use 'Foo_.getDeclaredSingularAttribute("value")' instead of 'Foo_.value', but it still doesn't work at all.</p>
  
  <p>Here is my code :</p>
  
  <pre><code>public List&lt;Transaction&gt; getTransactions(Date startDate, Date endDate) {
      EntityManager em = getEntityManager();
      try {
          CriteriaBuilder cb = em.getCriteriaBuilder();
          CriteriaQuery&lt;Transaction&gt; cq = cb.createQuery(Transaction.class);
          Metamodel m = em.getMetamodel();
          EntityType&lt;Transaction&gt; Transaction_ = m.entity(Transaction.class);
          Root&lt;Transaction&gt; transaction = cq.from(Transaction.class);
  
          // Error here. cannot find symbol. symbol: variable creationDate
          cq.where(cb.between(transaction.get(Transaction_.creationDate), startDate, endDate));
  
          // I also tried this:
          // cq.where(cb.between(Transaction_.getDeclaredSingularAttribute("creationDate"), startDate, endDate));
  
          List&lt;Transaction&gt; result = em.createQuery(cq).getResultList();
          return result;
      } finally {
          em.close();
      }
  }
  </code></pre>
  
  <p>Can someone help me to figure this out? Thanks.</p>
  
  <p>EDIT : here is the Transaction source (almost nothing in it, since it was automatically generated by Netbeans, from my database)</p>
  
  <pre><code>package projetjava.db;
  
  import java.io.Serializable;
  import java.util.Date;
  import javax.persistence.Basic;
  import javax.persistence.Column;
  import javax.persistence.Entity;
  import javax.persistence.GeneratedValue;
  import javax.persistence.GenerationType;
  import javax.persistence.Id;
  import javax.persistence.NamedQueries;
  import javax.persistence.NamedQuery;
  import javax.persistence.Table;
  import javax.persistence.Temporal;
  import javax.persistence.TemporalType;
  
  @Entity
  @Table(name = "transaction")
  @NamedQueries({
      @NamedQuery(name = "Transaction.findAll", query = "SELECT t FROM Transaction t"),
      @NamedQuery(name = "Transaction.findById", query = "SELECT t FROM Transaction t WHERE t.id = :id"),
      @NamedQuery(name = "Transaction.findByIDAccount", query = "SELECT t FROM Transaction t WHERE t.iDAccount = :iDAccount"),
      @NamedQuery(name = "Transaction.findByDescription", query = "SELECT t FROM Transaction t WHERE t.description = :description"),
      @NamedQuery(name = "Transaction.findByCreationDate", query = "SELECT t FROM Transaction t WHERE t.creationDate = :creationDate"),
      @NamedQuery(name = "Transaction.findByAmount", query = "SELECT t FROM Transaction t WHERE t.amount = :amount")})
  public class Transaction implements Serializable {
      private static final long serialVersionUID = 1L;
      @Id
      @GeneratedValue(strategy = GenerationType.IDENTITY)
      @Basic(optional = false)
      @Column(name = "ID")
      private Integer id;
      @Basic(optional = false)
      @Column(name = "IDAccount")
      private int iDAccount;
      @Basic(optional = false)
      @Column(name = "Description")
      private String description;
      @Basic(optional = false)
      @Column(name = "CreationDate")
      @Temporal(TemporalType.DATE)
      private Date creationDate;
      @Basic(optional = false)
      @Column(name = "Amount")
      private double amount;
  
      public Transaction() {
      }
  
      public Transaction(Integer id) {
          this.id = id;
      }
  
      public Transaction(Integer id, int iDAccount, String description, Date creationDate, double amount) {
          this.id = id;
          this.iDAccount = iDAccount;
          this.description = description;
          this.creationDate = creationDate;
          this.amount = amount;
      }
  
      public Integer getId() {
          return id;
      }
  
      public void setId(Integer id) {
          this.id = id;
      }
  
      public int getIDAccount() {
          return iDAccount;
      }
  
      public void setIDAccount(int iDAccount) {
          this.iDAccount = iDAccount;
      }
  
      public String getDescription() {
          return description;
      }
  
      public void setDescription(String description) {
          this.description = description;
      }
  
      public Date getCreationDate() {
          return creationDate;
      }
  
      public void setCreationDate(Date creationDate) {
          this.creationDate = creationDate;
      }
  
      public double getAmount() {
          return amount;
      }
  
      public void setAmount(double amount) {
          this.amount = amount;
      }
  
      @Override
      public int hashCode() {
          int hash = 0;
          hash += (id != null ? id.hashCode() : 0);
          return hash;
      }
  
      @Override
      public boolean equals(Object object) {
          // TODO: Warning - this method won't work in the case the id fields are not set
          if (!(object instanceof Transaction)) {
              return false;
          }
          Transaction other = (Transaction) object;
          if ((this.id == null &amp;&amp; other.id != null) || (this.id != null &amp;&amp; !this.id.equals(other.id))) {
              return false;
          }
          return true;
      }
  
      @Override
      public String toString() {
          return "projetjava.db.Transaction[id=" + id + "]";
      }
  
  }
  </code></pre>