[hibernate-issues] [Hibernate-JIRA] Commented: (HSEARCH-372) ClassBridges are not handled in projection

[Thomas Goetz (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=33268#action_33268 ] 

Thomas Goetz commented on HSEARCH-372:
--------------------------------------

Ok, in my case it works if I extend DocumentBuilderIndexedEntity.processFieldsForProjection like that:

--- snip ---
private static void processFieldsForProjection(PropertiesMetadata metadata, String[] fields, Object[] result, Document document) {
		final int nbrFoEntityFields = metadata.fieldNames.size();
		for ( int index = 0; index < nbrFoEntityFields; index++ ) {
			populateResult(
					metadata.fieldNames.get( index ),
					metadata.fieldBridges.get( index ),
					metadata.fieldStore.get( index ),
					fields,
					result,
					document
			);
		}

        // handle ClassBridge
        final int nbrOfClassFields = metadata.classNames.size();
        for (int index = 0; index < nbrOfClassFields; index++) {
            populateResult(
                    metadata.classNames.get(index),
                    metadata.classBridges.get(index),
                    metadata.classStores.get(index),
                    fields,
                    result,
                    document
            );
        }


		final int nbrOfEmbeddedObjects = metadata.embeddedPropertiesMetadata.size();
		for ( int index = 0; index < nbrOfEmbeddedObjects; index++ ) {
			//there is nothing we can do for collections
			if ( metadata.embeddedContainers.get( index ) == PropertiesMetadata.Container.OBJECT ) {
				processFieldsForProjection(
						metadata.embeddedPropertiesMetadata.get( index ), fields, result, document
				);
			}
		}
	}
--- snip ---

This may not be the desired solution, but as I only use ClassBridge with name() and don't do anything unusual inside the ClassBridge implementations, I can live with that hack for now.

> ClassBridges are not handled in projection
> ------------------------------------------
>
>                 Key: HSEARCH-372
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-372
>             Project: Hibernate Search
>          Issue Type: New Feature
>    Affects Versions: 3.1.0.GA
>            Reporter: Thomas Goetz
>            Priority: Critical
>             Fix For: 3.2.0
>
>         Attachments: ClassBridgeProjectionTest.zip
>
>
> Values that were stored by a ClassBridge are not accessible via projection. Luke shows the values, so I'm sure they are there. I think Emmanuel is already aware of the problem, as stated here: https://forum.hibernate.org/viewtopic.php?f=9&t=996373&view=previous
> As I run Hibernate Search from within JBoss I'm not quit sure how to demonstrate this bug in a standalone testcase. If someone gave me a hint on how this could be done without too much pain, I'd supply a test case.
> I use the following annotation on the class to be indexed: 
> @ClassBridge(
>         name = "amount_of_students",
>         index = Index.UN_TOKENIZED,
>         store = Store.YES,
>         impl = StudentsSizeBridge.class)
> public class Teacher implements Serializable {
> 	
> 	...
> 	
> }
> As I said, the amount_of_students value is correctly stored in the Lucene index (viewable with Luke), but if I try to project the value within a FullTextQuery it is always empty.

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