13.2. 验证约束

package org.jboss.as.quickstarts.bean_validation_custom_constraint;

@Entity
@Table(name = "person")
public class Person implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue
    @Column(name = "person_id")
    private Long personId;

    @NotNull

    @Size(min = 4)
    private String firstName;

    @NotNull
    @Size(min = 4)
    private String lastName;

    // Custom Constraint @Address for bean validation
    @NotNull
    @Address
    @OneToOne(mappedBy = "person", cascade = CascadeType.ALL)
    private PersonAddress personAddress;

    public Person() {

    }

    public Person(String firstName, String lastName, PersonAddress address) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.personAddress = address;
    }

    /* getters and setters omitted for brevity*/
}

package org.jboss.as.quickstarts.bean_validation_custom_constraint;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import javax.validation.Constraint;
import javax.validation.Payload;

// Linking the AddressValidator class with @Address annotation.
@Constraint(validatedBy = { AddressValidator.class })
// This constraint annotation can be used only on fields and method parameters.
@Target({ ElementType.FIELD, ElementType.PARAMETER })
@Retention(value = RetentionPolicy.RUNTIME)
@Documented
public @interface Address {

    // The message to return when the instance of MyAddress fails the validation.
    String message() default "Address Fields must not be null/empty and obey character limit constraints";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};
}

package org.jboss.as.quickstarts.bean_validation_custom_constraint;

import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.PrimaryKeyJoinColumn;
import javax.persistence.Table;

@Entity
@Table(name = "person_address")
public class PersonAddress implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @Column(name = "person_id", unique = true, nullable = false)
    @GeneratedValue(strategy = GenerationType.SEQUENCE)
    private Long personId;

    private String streetAddress;
    private String locality;
    private String city;
    private String state;
    private String country;
    private String pinCode;

    @OneToOne
    @PrimaryKeyJoinColumn
    private Person person;

    public PersonAddress() {

    }

    public PersonAddress(String streetAddress, String locality, String city, String state, String country, String pinCode) {
        this.streetAddress = streetAddress;
        this.locality = locality;
        this.city = city;
        this.state = state;
        this.country = country;
        this.pinCode = pinCode;
    }

    /* getters and setters omitted for brevity*/
}