Create custom finder with spring repository - spring

Question

I am using Spring Roo with repository layers. I have two classes: Document (with the title of the document) and FilledDocument (that contains the related Document). Like this:
public class Document {
/**
*/
#NotNull
private String titleDocument;
...
}
public class FilledDocument {
/**
*/
#OneToOne
private Document relatedDocument;
...
}
I would want to create a finder for the class FilledDocument that match for title inside of the atribute relatedDocument.
I am using a solution that isnt elegant and efficient. In my controller I have:
#RequestMapping(params = "find", produces = "text/html")
public String findFilledDocumentsByTitleDocumentContaining(#RequestParam(value = "title", required = true) String title, Model uiModel) {
LinkedList<FilledDocument> allFilledDocuments = new LinkedList<FilledDocument>();
allFilledDocuments.addAll(filledDocumentService.findAllFilledDocuments());
ArrayList<FilledDocument> filledDocuments=new ArrayList<FilledDocument>();
for( FilledDocument filledDocument : allFilledDocuments ) {
if( filledDocument.getRelatedDocument().getTitleDocument().toLowerCase().contains(title.toLowerCase()) == true ) {
filledDocuments.add(filledDocument);
}
}
uiModel.addAttribute("filleddocuments", filledDocuments);
return "filleddocuments/list";
}
I am reading this Spring Data JPA - Reference Documentation and I am trying with #Query in the repository class, like this:
#Query("select f from FilledDocument f where f.relatedDocument.titleDocument containing = ?1")
public ArrayList<FilledDocument> findFilledDocumentByTitleDocument(#Param("titleDocument") String titleDocument);
but it doesnt work. Any ideas?

Answer 1

If you are using Spring Data JPA 1.3.1 or newer that you can just write :
#Query("select f from FilledDocument f where f.relatedDocument.titleDocument like %:title%")
List<FilledDocument> findFilledDocumentByTitleDocument(#Param("title") String titleDocument);
If you are stuck on an older version then your code would be:
#Query("select f from FilledDocument f where f.relatedDocument.titleDocument like :title")
List<FilledDocument> findFilledDocumentByTitleDocument(#Param("title") String titleDocument);
And when you call the findFilledDocumentByTitleDocument method you need to pass
"%"+title+"%"
as an argument.
Check out this blog post for the full story and section 1.3.4 of the documentation.