Query DSL: Struggling with filtering operator 'contains'

[therrmann]

I have cached objects with a multivalued field like the following:

@Indexed

class Resource{

   @Field(analyze = Analyze.NO)

    private List<String> categories;

    ....

}

I want to search for all resources where the list categories contains a specific value.

Currently I am trying it like this:

QueryFactory factory=Search.getSearchManager(cache);

Query query=queryFactory.from(Resource.class).having("categories").contains("foo").toBuilder().build();

List<Resource> result=query.list();

This results in the following exception:

org.hibernate.search.bridge.BridgeException: Exception while calling bridge#set

  class: Resource

  path: categories

What am I doing wrong. Do I need to special annotations for the categories field?

Thanks in advance, Tobias

[anistor]

Hi Tobias,

A full stacktrace would help us find out the cause.

Thanks!

[therrmann]

I get the following stacktrace:

org.hibernate.search.bridge.BridgeException: Exception while calling bridge#set

  class: Resource

  path: categories

  at org.hibernate.search.bridge.util.impl.ContextualExceptionBridgeHelper.buildBridgeException(ContextualExceptionBridgeHelper.java:84)

  at org.hibernate.search.bridge.util.impl.ContextualExceptionBridgeHelper$OneWayConversionContextImpl.set(ContextualExceptionBridgeHelper.java:113)

  at org.hibernate.search.engine.spi.DocumentBuilderIndexedEntity.buildDocumentFields(DocumentBuilderIndexedEntity.java:432)

  at org.hibernate.search.engine.spi.DocumentBuilderIndexedEntity.getDocument(DocumentBuilderIndexedEntity.java:359)

  at org.hibernate.search.engine.spi.DocumentBuilderIndexedEntity.createUpdateWork(DocumentBuilderIndexedEntity.java:288)

  at org.hibernate.search.engine.spi.DocumentBuilderIndexedEntity.addWorkToQueue(DocumentBuilderIndexedEntity.java:230)

  at org.hibernate.search.engine.impl.WorkPlan$PerEntityWork.enqueueLuceneWork(WorkPlan.java:486)

  at org.hibernate.search.engine.impl.WorkPlan$PerClassWork.enqueueLuceneWork(WorkPlan.java:261)

  at org.hibernate.search.engine.impl.WorkPlan.getPlannedLuceneWork(WorkPlan.java:147)

  at org.hibernate.search.backend.impl.WorkQueue.prepareWorkPlan(WorkQueue.java:114)

  at org.hibernate.search.backend.impl.BatchedQueueingProcessor.prepareWorks(BatchedQueueingProcessor.java:56)

  at org.hibernate.search.backend.impl.TransactionalWorker.performWork(TransactionalWorker.java:85)

  at org.infinispan.query.backend.QueryInterceptor.performSearchWorks(QueryInterceptor.java:235)

  at org.infinispan.query.backend.QueryInterceptor.performSearchWork(QueryInterceptor.java:229)

  at org.infinispan.query.backend.QueryInterceptor.updateIndexes(QueryInterceptor.java:223)

  at org.infinispan.query.backend.QueryInterceptor.processPutKeyValueCommand(QueryInterceptor.java:446)

  at org.infinispan.query.backend.QueryInterceptor.visitPutKeyValueCommand(QueryInterceptor.java:164)

  at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:71)

  at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98)

  at org.infinispan.interceptors.locking.AbstractLockingInterceptor.visitPutKeyValueCommand(AbstractLockingInterceptor.java:48)

  at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:71)

  at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98)

  at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:112)

  at org.infinispan.commands.AbstractVisitor.visitPutKeyValueCommand(AbstractVisitor.java:35)

  at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:71)

  at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98)

  at org.infinispan.interceptors.CacheMgmtInterceptor.updateStoreStatistics(CacheMgmtInterceptor.java:159)

  at org.infinispan.interceptors.CacheMgmtInterceptor.visitPutKeyValueCommand(CacheMgmtInterceptor.java:145)

  at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:71)

  at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98)

  at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:102)

  at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:71)

  at org.infinispan.commands.AbstractVisitor.visitPutKeyValueCommand(AbstractVisitor.java:35)

  at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:71)

  at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:333)

  at org.infinispan.cache.impl.CacheImpl.executeCommandAndCommitIfNeeded(CacheImpl.java:1578)

  at org.infinispan.cache.impl.CacheImpl.putInternal(CacheImpl.java:1056)

  at org.infinispan.cache.impl.CacheImpl.put(CacheImpl.java:1048)

  at org.infinispan.cache.impl.CacheImpl.put(CacheImpl.java:1649)

  at org.infinispan.cache.impl.CacheImpl.put(CacheImpl.java:246)

  at TestClass.writeResource(TestClass.java:183)

  Caused by: java.lang.ClassCastException: java.util.Collections$EmptyList cannot be cast to java.lang.String

  at org.hibernate.search.bridge.builtin.StringBridge.objectToString(StringBridge.java:27)

  at org.hibernate.search.bridge.builtin.impl.String2FieldBridgeAdaptor.set(String2FieldBridgeAdaptor.java:31)

  at org.hibernate.search.bridge.util.impl.ContextualExceptionBridgeHelper$OneWayConversionContextImpl.set(ContextualExceptionBridgeHelper.java:110)

  ... 80 more

[anistor]

Hi Tobias,

just add @FieldBridge(impl = BuiltinIterableBridge.class) to your 'categories' field and the error will disappear. The query will work too

Adrian

[therrmann]

Thanks, that helped. Do you know where to find a good documentation of these annotations? I googled quite a bit before posting here, but didn't find anything.

Regards, Tobias

[anistor]

These are documented in the Hibernate Search Reference guide (Hibernate Search) but this particular one does not seem to be. Besides their user guide I find their unit tests to be very useful.