package jumpstart.web.pages.examples.input;

import javax.ejb.EJB;

import jumpstart.business.domain.person.Person;
import jumpstart.business.domain.person.iface.IPersonFinderServiceLocal;
import jumpstart.business.domain.person.iface.IPersonManagerServiceLocal;
import jumpstart.util.ExceptionUtil;

import org.apache.tapestry5.annotations.Import;
import org.apache.tapestry5.annotations.InjectComponent;
import org.apache.tapestry5.annotations.InjectPage;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.corelib.components.BeanEditForm;

@Import(stylesheet = "css/examples/plain.css")
public class Edit1 {

    // The activation context

    private Long personId;

    // Screen fields

    @Property
    private Person person;

    // Other pages

    @InjectPage
    private Edit2 page2;

    // Generally useful bits and pieces

    @InjectComponent("personForm")
    private BeanEditForm form;

    @EJB
    private IPersonFinderServiceLocal personFinderService;

    @EJB
    private IPersonManagerServiceLocal personManagerService;

    // The code

    // onActivate() is called by Tapestry to pass in the activation context from the URL.

    void onActivate(Long personId) {
        this.personId = personId;
    }

    // onPassivate() is called by Tapestry to get the activation context to put in the URL.

    Long onPassivate() {
        return personId;
    }

    // Form bubbles up the PREPARE_FOR_RENDER event during form render.

    void onPrepareForRender() throws Exception {

        // If fresh start, make sure there's a Person object available.

        if (form.isValid()) {
            person = findPerson(personId);

            // We'd like to handle null person in the template, but can't because we're in BeanEditForm. 
            // BeanEditForm doesn't handle null object well, so throw an exception to bypass it.

            if (person == null) {
                throw new Exception("Person " + personId + " does not exist.");
            }
        }

    }

    // Form bubbles up the PREPARE_FOR_SUBMIT event during form submission.

    void onPrepareForSubmit() {

        // Get Person object for the form fields to overlay.
        person = findPerson(personId);

        if (person == null) {
            form.recordError("Person has been deleted by another process.");
            // Instantiate an empty person to avoid NPE in the BeanEditForm.
            person = new Person();
        }
    }

    void onValidateFromPersonForm() {

        if (person.getFirstName() != null && person.getFirstName().equals("Acme")) {
            form.recordError("First Name must not be Acme.");
        }

        if (personId == 2 && !person.getFirstName().equals("Mary")) {
            form.recordError("First Name for this person must be Mary.");
        }

        if (form.getHasErrors()) {
            // We get here only if a server-side validator detected an error.
            return;
        }

        try {
            personManagerService.changePerson(person);
        }
        catch (Exception e) {
            // Display the cause. In a real system we would try harder to get a user-friendly message.
            form.recordError(ExceptionUtil.getRootCauseMessage(e));
        }
    }

    Object onSuccess() {
        page2.set(personId);
        return page2;
    }

    void onRefresh() {
        // By doing nothing the page will be displayed afresh.
    }

    private Person findPerson(Long personId) {
        Person person = personFinderService.findPerson(personId);

        if (person == null && personId < 4) {
            throw new IllegalStateException("Database data has not been set up!");
        }

        return person;
    }
}

.eg {
                margin: 20px 0;
                padding: 14px;
                border: 1px solid #ddd;
                border-radius: 6px;
                -webkit-border-radius: 6px;
                -mox-border-radius: 6px;
}

package jumpstart.business.domain.person;

import java.io.Serializable;
import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EnumType;
import javax.persistence.Enumerated;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.PrePersist;
import javax.persistence.PreUpdate;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.Version;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;


/**
 * The Person entity.
 */
@Entity
@SuppressWarnings("serial")
public class Person implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(nullable = false)
    private Long id;

    @Version
    @Column(nullable = false)
    private Integer version;

    @Column(length = 10, nullable = false)
    @NotNull
    @Size(max = 10)
    private String firstName;

    @Column(length = 10, nullable = false)
    @NotNull
    @Size(max = 10)
    private String lastName;
    
    @Enumerated(EnumType.STRING)
    @NotNull
    private Regions region;

    @Temporal(TemporalType.DATE)
    @NotNull
    private Date startDate;

    public String toString() {
        final String DIVIDER = ", ";
        
        StringBuilder buf = new StringBuilder();
        buf.append(this.getClass().getSimpleName() + ": ");
        buf.append("[");
        buf.append("id=" + id + DIVIDER);
        buf.append("version=" + version + DIVIDER);
        buf.append("firstName=" + firstName + DIVIDER);
        buf.append("lastName=" + lastName + DIVIDER);
        buf.append("region=" + region + DIVIDER);
        buf.append("startDate=" + startDate);
        buf.append("]");
        return buf.toString();
    }

    // Default constructor is required by JPA.
    public Person() {
    }

    public Person(String firstName, String lastName, Regions region, Date startDate) {
        super();
        this.firstName = firstName;
        this.lastName = lastName;
        this.region = region;
        this.startDate = startDate;
    }

    // The need for an equals() method is discussed at http://www.hibernate.org/109.html
    
    @Override
    public boolean equals(Object obj) {
        return (obj == this) || (obj instanceof Person) && id != null && id.equals(((Person) obj).getId());
    }

    // The need for a hashCode() method is discussed at http://www.hibernate.org/109.html

    @Override
    public int hashCode() {
        return id == null ? super.hashCode() : id.hashCode();
    }

    @PrePersist
    @PreUpdate
    public void validate() throws ValidationException {

    }

    public Long getId() {
        return id;
    }

    public Integer getVersion() {
        return version;
    }

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

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public Regions getRegion() {
        return region;
    }

    public void setRegion(Regions region) {
        this.region = region;
    }

    public Date getStartDate() {
        return startDate;
    }

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

}

package jumpstart.business.domain.person;

public enum Regions {
    EAST_COAST, WEST_COAST;
}