[jira] [Resolved] (SOLR-328) Proposal: ObjectField for storing and retrieving arbitrary serializable Objects

["Erick Erickson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Erick Erickson resolved SOLR-328.
---------------------------------

    Resolution: Fixed

Cleaning up old JIRAs, re-open if necessary. Exists binary type now.
                
> Proposal: ObjectField for storing and retrieving arbitrary serializable Objects
> -------------------------------------------------------------------------------
>
>                 Key: SOLR-328
>                 URL: https://issues.apache.org/jira/browse/SOLR-328
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>    Affects Versions: 1.3
>            Reporter: Jonathan Woods
>            Priority: Minor
>         Attachments: ObjectField.patch
>
>
> A while back I developed a means of storing and retrieving arbitrary Objects in a Lucene Document [Field], and I thought that something similar might be useful for Solr.  Clearly, it will have more use in embedded Solr implementations, but there's no reason why remote clients couldn't share Object implementations and benefit too.
> I wanted to attach a draft implementation of ObjectField, a subclass of org.apache.solr.schema.FieldType, but I soon got lost in a sea of Solr Strings.  Instead, I've ended this message with code for getting and setting Object values in Lucene Fields.  Someone who's closer to Solr could easily include this in an implementation of ObjectField.
> The approach uses Java serialisation, which is often seen as fragile in the sense that changes in class implementation can easily break the serialisation format.  However, imo that doesn't matter at all here: if a class's implementation changes all you'd need to do is re-index; and in any case object structure changes are nowhere near as common as object content changes, which are bread and butter to Solr.
> Comments welcomed.  Oh, and since this is my first communication with Solr - thanks to all concerned for a great piece of software.
> Jon
> ========================================================
> public static Object getObject(final Document document, final String fieldName) {
> 	final byte[] serialisation = document.getBinaryValue(fieldName);
> 	try {
> 		return new ObjectInputStream(new ByteArrayInputStream(serialisation)).readObject();
> 	}
> 	catch (final Exception e) {
> 		throw new SearchRuntimeException("While trying to deserialise object from Field", e);
> 	}
> }
> public static void indexObject(final Document document, final String fieldName, final Serializable object, final boolean compress) throws IndexingException {
> 	final ByteArrayOutputStream boas = new ByteArrayOutputStream();
> 	try {
> 		ObjectOutputStream oos = new ObjectOutputStream(boas);
> 		oos.writeObject(object);
> 		oos.close();
> 	}
> 	catch (IOException e) {
> 		throw new IndexingException("On trying to serialise object", e);
> 	}
> 	document.add(new Field(fieldName, boas.toByteArray(), compress ? Store.COMPRESS : Store.YES));
> }

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org