com.liferay.portal.kernel.search
Interfaces 
BooleanClause
BooleanClauseFactory
BooleanClauseOccur
BooleanQuery
BooleanQueryFactory
Document
Hits
Indexer
IndexerRegistry
IndexSearcher
IndexWriter
OpenSearch
PortalSearchEngine
Query
QueryTerm
SearchEngine
SearchPermissionChecker
TermQuery
TermQueryFactory
WildcardQuery
Classes 
BooleanClauseFactoryUtil
BooleanClauseOccurImpl
BooleanQueryFactoryUtil
DocumentComparator
DocumentComparatorOrderBy
DocumentImpl
Field
HitsImpl
IndexerRegistryUtil
SearchContext
SearchEngineUtil
Sort
StringQueryImpl
Summary
TermQueryFactoryUtil
Exceptions 
ParseException
SearchException