Examples of org.hibernate.search.indexes.IndexReaderAccessor.open()

Class org.hibernate.search.indexes.IndexReaderAccessor

Examples of org.hibernate.search.indexes.IndexReaderAccessor.open()

org.hibernate.search.indexes.IndexReaderAccessor.open()
Opens an IndexReader on all indexes containing the entities passed as parameter. In the simplest case passing a single entity will map to a single index; if the entity uses a sharding strategy or if multiple entities using different index names are selected, the single IndexReader will act as a MultiReader on the aggregate of these indexes. This MultiReader is not filtered by Hibernate Search, so it might contain information relevant to different types as well.
The returned IndexReader is read only; writing directly to the index is discouraged. If you need to write to the index use the {@link org.hibernate.search.spi.SearchFactoryIntegrator#getWorker()} to queue change operations to the backend.

The IndexReader should not be closed in other ways except being returned to this instance via {@link #close(IndexReader)}.
@param entities the entity types for which to return a (multi)reader @return an IndexReader containing at least all listed entities @throws java.lang.IllegalArgumentException if one of the specified classes is not indexed


                // search on all indexed fields: generate field list, removing internal hibernate search field name: _hibernate_class
                // TODO: possible improvement: cache the fields of each entity
                SearchFactory searchFactory = fullTextEntityManager.getSearchFactory();
                readerAccessor = searchFactory.getIndexReaderAccessor();
                reader = readerAccessor.open(searchedEntity);
                Collection<String> fieldNames = new HashSet<>();
                for (FieldInfo fieldInfo : ReaderUtil.getMergedFieldInfos(reader)) {
                    if (fieldInfo.isIndexed) {
                        fieldNames.add(fieldInfo.name);
                    }

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                // search on all indexed fields: generate field list, removing internal hibernate search field name: _hibernate_class
                // TODO: possible improvement: cache the fields of each entity
                SearchFactory searchFactory = txtSession.getSearchFactory();
                readerAccessor = searchFactory.getIndexReaderAccessor();
                reader = readerAccessor.open(searchedEntity);
                Collection<String> fieldNames = new HashSet<>();
                for (FieldInfo fieldInfo : ReaderUtil.getMergedFieldInfos(reader)) {
                    if (fieldInfo.isIndexed) {
                        fieldNames.add(fieldInfo.name);
                    }

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    assertFalse( indexContainsField( "parents.parents.parents.employees.name" ) );
  }


  private boolean indexContainsField(String fieldName) throws IOException {
    IndexReaderAccessor indexReaderAccessor = getSearchFactory().getIndexReaderAccessor();
    IndexReader indexReader = indexReaderAccessor.open( WorkingPerson.class );
    try {
      for ( AtomicReaderContext leave : indexReader.leaves() ) {
        if ( leave.reader().terms( fieldName ) != null ) {
          return true;
        }

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