[hibernate-issues] [Hibernate-JIRA] Commented: (HSEARCH-115) Add a default value for indexing null value

[Emmanuel Bernard (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_28779 ] 

Emmanuel Bernard commented on HSEARCH-115:
------------------------------------------

And that's why I imagined it probably must be postponned to 3.1 We will have to break the bridge API to introduce the default null value (or maybe an implementation). This is really the fieldbridge's responsibility to do this job. All HSearch can do is to give a hint about the default value if the object is null.

We can't fight ambiguity, and we can't fight crypto analyzers either. When a user pick up a specific 'null' value, then it's his responsibility. The default should still be no indexing as it is today as this is the right semantic.

> Add a default value for indexing null value
> -------------------------------------------
>
>                 Key: HSEARCH-115
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-115
>             Project: Hibernate Search
>          Issue Type: Improvement
>          Components: mapping
>            Reporter: Julien Brulin
>            Assignee: Hardy Ferentschik
>             Fix For: 3.0.1, 3.1.0
>
>
> Hi,
> Null elements are not indexed by lucene then it's not easy to use a nullable property in lucene query.
> I have a TagTranslation entity in my model with a nullable property language. In this case null is used as default language for tag translation.
> Each translation may have many variations like synonyms. 
> Because I can specified a default value for null value in the @Field annotation like this @Field(index=Index.UN_TOKENIZED, store=Store.NO, default='null'), i can't search a cat tag with a default translation like this : +value:cat* +lang:null 
> <pre></code>
> @Entity()
> @Table(name="indexing_tag_trans")
> @org.hibernate.annotations.Cache(usage=org.hibernate.annotations.CacheConcurrencyStrategy.READ_WRITE)
> @Indexed
> public class TagTranslation implements java.io.Serializable {
>     
>   
> 	private static final long serialVersionUID = -1065316566731456110L;
> 	
>     @Id
>     @GeneratedValue(strategy=GenerationType.IDENTITY)
>     @DocumentId
>     private Integer id;
>     
> 	@Field(index=Index.UN_TOKENIZED, store=Store.NO)
>     private String language;
>     
>     @Field(index=Index.TOKENIZED, store=Store.YES)
>     private String value;
>     
>     @OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY)
>     @org.hibernate.annotations.Fetch(org.hibernate.annotations.FetchMode.SUBSELECT)
>     @JoinColumn(name="translation_id")
>     @IndexedEmbedded
>     private List<TagVariation> variations = new LinkedList<TagVariation>();
>     
>     public TagTranslation() { }
> ...
> </code>
> </pre>
> What do you think about that ?
> Ps: sorry for english write, i am a french guy.

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