February 2008 - hibernate-dev - Jboss List Archives

Re: SVN Tag for 3.2.0.GA? (hibernate-tools)

by Tomislav Stojcevich

This was for hibernate-tools. On Feb 19, 2008 10:07 AM, Tomislav Stojcevich <stojcevicht(a)gmail.com> wrote: > Was a tag created for this release? The closest I can find is CR1, I > need the sources to the GA release. > > > Thanks, > --tom > -- --tom

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[Search] Adding more functionality to ScopedAnalyzer

by Nick Vincent

Hi there, I would like to extend ScopeAnalyzer so that I can specify an analyzer for some extra fields that my custom bridge is writing into the index. I don't (and can't really) create dummy accessors in my class for these as their names are based on database data. For example imagine we wanted to search for staff by their department, so our field name might be: people.sales people.customerservice Assume these departments would come from the DB and wouldn't be hard coded into code, and require a custom analyzer. In order to support specifying a custom analyzer for these records there would need to be a way of specifying a wildcard in the ScopeAnalyzer that would match "people.*". This is a feature I need, and something which may be needed in the future. I'm happy to develop a patch for it. The way I would propose to approach this is: 1) Make ScopedAnalyzer match wildcards, which could be done by holding a second map of analyzers, sorted by key longest first, and if an analyzer cannot be found directly for a given field wilcard matches can be checked. If a match is found it can be explicitly populated in the direct cache for immediate lookup. If there is a miss then the default analyzer can be inserted, saving further wildcard tests. Performance penalty would be minimal. 2) Configure ScopedAnalyzer with the wildcards. I can see two approaches to doing this: a) Create a new class level annotation @AnalyzerBindings that takes something like @AnalyzerBindings({ @AnalyzerBinding(pattern="person.department.*", impl=MyAnalyzer.class) }) Configure this from DocumentBuilder when the class is setup. b) Create a callback or other mechanism that allows custom bridges to specify which patterns they would like to match. I'd suggest a method like Map<String, Analyzer) getCustomAnalyzers () could be added to the Bridge interface (or another interface to avoid breaking changes) which could be called when the bridges are configured in DocumentBuilder. Any feedback on either approach is much appreciated. Cheers, Nick

16 years, 2 months

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Adding fetch joins to HQL queries programatically

by Ali H. Ibrahim

Hi, I would like to be able to extend the functionality of org.hibernate.Query in two ways: 1. Have a method on Query that returns the result aliases and their position in the resulting object array. I think this information is already available at the QueryImpl level, but just not exposed through the public Query interface. Right now, if you do not use the AliasToMapResultTransformer this information cannot be accessed. 2. Being able to add fetch joins programmatically for a given alias. This is possible through straight hacking of the Hibernate code (I found the cleanest place to add the fetch join was in QueryLoader, but it could be done at the AST level too). I would like to do able to do this without resorting hacking Hibernate directly, but instead through a public API or extension point. Of course I could parse the HQL directly, but that is very ugly. Both of these points are already available in Criteria. Regards, Ali Ibrahim Autofetch: http://www.cs.utexas.edu/~aibrahim/autofetch

16 years, 2 months

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Hibernate extension points

by Ali H. Ibrahim

Hi, I have been working on an extension to Hibernate called Autofetch. I ran into some pain points and although I have worked around them for now, I was wondering which of these I could help make better either through patches or JIRA issues. Most of these are pretty selfish in that they would have made my life easier by making more code accessible. 1. AbstractLazyInitializer has the initialize method as final. It can be useful to be able to override that method to do stuff. I realize it is important to make sure that the method is eventually called. 2. AbstractPersistentCollection has read and write methods as final. Again, it was useful in my extension to be able to override these methods. 3. DefaultInitializeCollectionListener has initializeCollectionFromCache method as private. When I subclassed the DefaultInitializeCollectionListener I would have like to have been able to call this method from my subclass instead of copying the code. 4. The PojoInstantiator's state is all private with no getters. It would have nice to be able to subclass it in a meaningful way. 5. A generally useful class is a delegate interceptor which takes takes an interceptor as a constructor argument and by default dispatches requests to that interceptor. 6. Might be nice for HbmBinder not to be a static class. 7. Right now, the tuplizer extension point allows for very broad changes in how entities are instantiated, proxies, etc. However there is no such extension point for the PersistentCollection classes. I know you can change the underlying collection behavior, but I need to change the behavior of the collection classes before the underlying collection is instantiated. Shameless plug for Autofetch: http://www.cs.utexas.edu/~aibrahim/autofetch. Basically Autofetch tries to automate association fetches for queries, with the goal of eliminating the need for programmer provided fetch annotations either in the configuration file or in the queries themselves. It does so by monitoring a programs traversals and learning the correct fetch profile for each class of queries. It differentiates queries not only using the query itself, but also the stack trace so that different invocations of method containing a query will be treated differently. Regards, Ali Ibrahim

16 years, 2 months

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Trying to build trunk

by Jay D. McHugh

Hello all, I have been trying to build trunk for the past several days and the instructions that I have found don't appear to be current (they refer to using Ant even though there have been recent discussions on this list referring to maven). Is there a more current doc that .../268 ? Or, if there is not - could someone give me full directions for building Hibernate trunk from a clean start? Thanks, Jay

16 years, 2 months

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