Hi!

I hava two classes that have the following structure:

@Entity
@SequenceGenerator(name = "crawlerdocument_sequence", sequenceName = "crawlerdocument_id_seq")
@Inheritance(strategy = InheritanceType.JOINED)
public abstract class CrawlerDocument implements Serializable {

 //The states a document can have in the DB
 /**
 * This state transcribes the normal state of a document
 */
 public static final int IDLE = 0;
 /**
 * This state transcribes that the document is being crawled/indexed
 */
 public static final int UPDATING_REPOSITORY = 1;
 /**
 * This state transcribes the document has been updated in the filesystem
 */
 public static final int UPDATED = 2;
 /**
 * This state transcribes the document has not been changed in the file system
 */
 public static final int NOT_CHANGED = 3;
 /**
 * This state transcribes the document has been created int he file system
 */
 public static final int INSERTED = 4;

 protected Permissions permissions;

 protected Repository repository;

 private int state;

 private Long id;

 public CrawlerDocument(){}

 @Id
 @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "crawlerdocument_sequence")
 public Long getId() {
 return id;
 }

 @Column(length = 2700)
 public Permissions getPermissions(){
 return this.permissions;
 }

 public void setPermissions(Permissions permissions){
 this.permissions = permissions;
 }


 @ManyToOne(targetEntity = Repository.class , optional=false,fetch = FetchType.EAGER)
 public Repository getRepository(){
 return this.repository;
 }

 public void setRepository(Repository repository){
 this.repository = repository;
 }

 public void setState(int state){
 this.state = state;
 }

 public int getState(){
 return this.state;
 }

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

A another class that extends this class:

@Entity
@IdClass(FileSystemCrawlerDocumentPK.class)
public class FileSystemCrawlerDocument extends CrawlerDocument{

 private static final long serialVersionUID = 4457330551129440853L;

 private String fullPath;
 private String rootPath;
 private String fileName;
 private String repositoryRelativePath;
 private Date lastChanged;

 public FileSystemCrawlerDocument(){}

 /**
 * Contructor to be used only for directories, though they are not saved we can process
 * the path in order to keep the part after the root path
 * @param fullPath
 * @param rootPath
 */
 public FileSystemCrawlerDocument(String fullPath,String rootPath){
 this.fullPath = fullPath;
 this.rootPath = rootPath;
 this.repositoryRelativePath = fullPath.substring(rootPath.length());
 this.permissions = new Permissions();
 }

 /**
 * Contructor to be used for the processed files these inherit both the permissions
 * and the relative path of the parent directory
 * @param parent
 * @param fileName
 */
 public FileSystemCrawlerDocument(FileSystemCrawlerDocument parent, String fileName){
 this.fileName = fileName;
 this.repositoryRelativePath = parent.getRepositoryRelativePath();
 this.permissions = parent.getPermissions();
 }

 @Transient
 public String getFullPath() {
 return fullPath;
 }

 public void setFullPath(String fullPath) {
 this.fullPath = fullPath;
 }

 @Transient
 public String getRootPath() {
 return rootPath;
 }

 public void setRootPath(String rootPath) {
 this.rootPath = rootPath;
 }

 @Id
 @Column(length = 1500)
 public String getFileName() {
 return fileName;
 }

 public void setFileName(String fileName) {
 this.fileName = fileName;
 }

 @Id
 @Column(length = 2700)
 public String getRepositoryRelativePath() {
 return repositoryRelativePath;
 }

 public void setRepositoryRelativePath(String repositoryRelativePath) {
 this.repositoryRelativePath = repositoryRelativePath;
 }


 public String toString() {
 return "FileSystemCrawlerDocument{" +
 "fullPath='" + fullPath + '\'' +
 ", rootPath='" + rootPath + '\'' +
 ", fileName='" + fileName + '\'' +
 ", repositoryRelativePath='" + repositoryRelativePath + '\'' +
 ", repository=" + repository +
 ", permissions=" + permissions +
 '}';
 }

 @Temporal(TemporalType.TIMESTAMP)
 public Date getLastChanged() {
 return lastChanged;
 }

 public void setLastChanged(Date lastChanged) {
 this.lastChanged = lastChanged;
 }
}

This second class uses the following id class:

public class FileSystemCrawlerDocumentPK implements Serializable {

 private String fileName;
 private String repositoryRelativePath;

 public String getFileName() {
 return fileName;
 }

 public void setFileName(String fileName) {
 this.fileName = fileName;
 }

 public String getRepositoryRelativePath() {
 return repositoryRelativePath;
 }

 public void setRepositoryRelativePath(String repositoryRelativePath) {
 this.repositoryRelativePath = repositoryRelativePath;
 }

 public boolean equals(Object o) {
 if (this == o) return true;
 if (o == null || getClass() != o.getClass()) return false;

 final FileSystemCrawlerDocumentPK that = (FileSystemCrawlerDocumentPK) o;

 if (!fileName.equals(that.fileName)) return false;
 if (!repositoryRelativePath.equals(that.repositoryRelativePath)) return false;

 return true;
 }

 public int hashCode() {
 int result;
 result = fileName.hashCode();
 result = 29 * result + repositoryRelativePath.hashCode();
 return result;
 }
}

The objective is to map to a DB model a bit like this

Table CrawlerDocument
id, int , sequence, pk
attr 1
attr 2

Table FileSystemCrawlerDocument
id (from CrawlerDocument), int , sequence, pk, fk
fileName, pk
relativeRootPath, pk
attr3
attr4



I can't seem to get this to work.

I gives me the following error:

org.hibernate.AnnotationException: Unable to define/override @Id(s) on a subclass: com.criticalsoftware.search.entities.FileSystemCrawlerDocument


I'm using Jboss 4.0.4 GA with EJB3


Any help would be very much appreciated.