is this a bug in EJB?

[mnrz]

hello

I have some entity in my application, when I declare a method starting with term "is" the database will be updated with a new field whereas I didn't declare that field as a database field

here is an example:

import static org.jboss.seam.ScopeType.SESSION;

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import org.hibernate.validator.NotNull;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;

@Entity
@Table(name ="group_permission")
@Name("group")
@Scope(SESSION)
public class Group implements Serializable{

 private String name;
 private Long id;
 private Integer permissionGroup = new Integer(0);
 private Set<Permission> permissions =new HashSet<Permission>();
 private static final int Export_Permission = 8;
 private static final String All_Permission = "*";

 @OneToMany(mappedBy="group", fetch = FetchType.EAGER ,cascade=CascadeType.ALL )
 public Set<Permission> getPermissions() {
 return permissions;
 }

 public void setPermissions(Set<Permission> permissions) {
 this.permissions = permissions;
 }
 @Id @GeneratedValue
 @Column(name = "id")
 public Long getId() {
 return id;
 }
 public void setId(Long id) {
 this.id = id;
 }

 @NotNull
 @Column(name="name")
 public String getName() {
 return name;
 }
 public void setName(String name) {
 this.name = name;
 }
 public boolean equals(Object o) {
 if (o == null)
 return false;

 if (!(o instanceof Group))
 return false;

 Group that = (Group) o;

 return this.getName().equals(that.getName());
 }

 public int hashCode() {

 return this.getName().hashCode()+720;

 }

 @Column(name="permissionGroup")
 public Integer getPermissionGroup() {
 return permissionGroup;
 }

 public void setPermissionGroup(Integer permissionGroup) {
 this.permissionGroup = permissionGroup;
 }
 public void setPermission(boolean permission){
 permissionGroup=0;
 if(permission){
 permissionGroup=permissionGroup | Export_Permission;
 }

 }
 public void addPermission(ColumnHeader ch ,String categoryName){

 if(permissions==null){
 permissions=new HashSet<Permission>();
 }
 if(ch.isDisplayable() ||ch.isSearchable()){
 Permission permission=new Permission();
 permission.setGroup(this);
 permission.setCategory(categoryName);
 permission.displayablePermission(ch.isDisplayable());
 permission.searchablePermission(ch.isSearchable());
 permission.setFieldName(ch.getName());
 permissions.add(permission);
 }
 }
 
 public boolean hasExportPermission(){
 if((Export_Permission & Export_Permission) == Export_Permission)
 return true;
 else
 return false;
 }

 public void setExportPermission(boolean export){
 if(export) {
 permissionGroup = permissionGroup | Export_Permission;
 }else {
 permissionGroup = permissionGroup & ~Export_Permission;
 }
 }

 public boolean hasDisplayPermission(String categoryName, String fieldName) {
 for(Permission p: permissions) {
 if(p.getCategory().trim().equals(All_Permission)){
 return true;
 }
 if(p.getCategory().equals(categoryName) && p.getFieldName().equals(fieldName)) {
 return p.hasDisplayablePermission();
 }
 }
 return false;
 }

 public boolean hasSearchPermission(String categoryName, String fieldName) {
 for(Permission p: permissions) {
 if(p.getCategory().equals(All_Permission)){
 return true;
 }
 if(p.getCategory().equals(categoryName) && p.getFieldName().equals(fieldName)) {
 return p.hasSearchablePermission();
 }
 }
 return false;
 }

}

as you can see in above code represented in blue color, I have some utility method in my entity, if I rename the method hasExportPermission() to isExportPermission() the EJB will create a field in corresponding table with name exportPermission and because it returns boolean the type of the field will be tinyint(1) (using mySql)

I expect since I didn't declare it by annotations it shouldn't consider it as a table field, but it does!!!!

I want to know whether this is a bug or I made a mistake somewhere

it is remarkable to say that I am using JBoss Seam framework, but I don't think this is its fault.

thank you very much

[waynebaylor]

that is the default behavior.

Hibernate is parsing attribute info from the getter/setter methods since you have declared @Id on the getId() method . is*() is considered a valid getter for boolean, thus the resulting DB column. you can mark the is*() method with @Transient and it will be ignored.