| Package | Description | 
|---|---|
| org.apache.lucene.analysis | Text analysis. | 
| org.apache.lucene.codecs.blocktree | BlockTree terms dictionary. | 
| org.apache.lucene.index | Code to maintain and access indices. | 
| org.apache.lucene.search | Code to search indices. | 
| org.apache.lucene.util.automaton | Finite-state automaton for regular expressions. | 
| Class and Description | 
|---|
| Automaton Represents an automaton and all its states and transitions. | 
| Class and Description | 
|---|
| CompiledAutomaton Immutable class holding compiled details for a given
 Automaton. | 
| Class and Description | 
|---|
| CompiledAutomaton Immutable class holding compiled details for a given
 Automaton. | 
| Class and Description | 
|---|
| Automaton Represents an automaton and all its states and transitions. | 
| AutomatonProvider Automaton provider for  RegExp.RegExp.toAutomaton(AutomatonProvider,int) | 
| CompiledAutomaton Immutable class holding compiled details for a given
 Automaton. | 
| Class and Description | 
|---|
| Automaton Represents an automaton and all its states and transitions. | 
| AutomatonProvider Automaton provider for  RegExp.RegExp.toAutomaton(AutomatonProvider,int) | 
| ByteRunAutomaton Automaton representation for matching UTF-8 byte[]. | 
| CompiledAutomaton.AUTOMATON_TYPE Automata are compiled into different internal forms for the
 most efficient execution depending upon the language they accept. | 
| FiniteStringsIterator Iterates all accepted strings. | 
| RegExp Regular Expression extension to  Automaton. | 
| RunAutomaton Finite-state automaton with fast run operation. | 
| TooComplexToDeterminizeException This exception is thrown when determinizing an automaton would result in one
 has too many states. | 
| Transition Holds one transition from an  Automaton. | 
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