Uses of Class
org.apache.lucene.util.automaton.Automaton

Packages that use Automaton

Package	Description
org.apache.lucene.analysis	Text analysis.
org.apache.lucene.search	Code to search indices.
org.apache.lucene.util.automaton	Finite-state automaton for regular expressions.

Uses of Automaton in org.apache.lucene.analysis

Methods in org.apache.lucene.analysis that return Automaton

Modifier and Type	Method and Description
Automaton	TokenStreamToAutomaton.toAutomaton(TokenStream in) Pulls the graph (including PositionLengthAttribute) from the provided TokenStream, and creates the corresponding automaton where arcs are bytes (or Unicode code points if unicodeArcs = true) from each term.

Uses of Automaton in org.apache.lucene.search

Fields in org.apache.lucene.search declared as Automaton

Modifier and Type	Field and Description
protected Automaton	AutomatonQuery.automaton the automaton to match index terms against

Methods in org.apache.lucene.search that return Automaton

Modifier and Type	Method and Description
static Automaton	FuzzyTermsEnum.buildAutomaton(String text, int prefixLength, boolean transpositions, int maxEdits) Builds a binary Automaton to match a fuzzy term
Automaton	AutomatonQuery.getAutomaton() Returns the automaton used to create this query
Automaton	FuzzyQuery.toAutomaton() Expert: Constructs an equivalent Automaton accepting terms matched by this query
static Automaton	PrefixQuery.toAutomaton(BytesRef prefix) Build an automaton accepting all terms with the specified prefix.
static Automaton	TermRangeQuery.toAutomaton(BytesRef lowerTerm, BytesRef upperTerm, boolean includeLower, boolean includeUpper)
static Automaton	WildcardQuery.toAutomaton(Term wildcardquery) Convert Lucene wildcard syntax into an automaton.

Constructors in org.apache.lucene.search with parameters of type Automaton

Constructor and Description
AutomatonQuery(Term term, Automaton automaton) Create a new AutomatonQuery from an Automaton.
AutomatonQuery(Term term, Automaton automaton, int maxDeterminizedStates) Create a new AutomatonQuery from an Automaton.
AutomatonQuery(Term term, Automaton automaton, int maxDeterminizedStates, boolean isBinary) Create a new AutomatonQuery from an Automaton.

Uses of Automaton in org.apache.lucene.util.automaton

Fields in org.apache.lucene.util.automaton declared as Automaton

Modifier and Type	Field and Description
Automaton	CompiledAutomaton.automaton Two dimensional array of transitions, indexed by state number for traversal.

Methods in org.apache.lucene.util.automaton that return Automaton

Modifier and Type	Method and Description
static Automaton	DaciukMihovAutomatonBuilder.build(Collection<BytesRef> input) Build a minimal, deterministic automaton from a sorted list of BytesRef representing strings in UTF-8.
static Automaton	Operations.complement(Automaton a, int maxDeterminizedStates) Returns a (deterministic) automaton that accepts the complement of the language of the given automaton.
static Automaton	Operations.concatenate(Automaton a1, Automaton a2) Returns an automaton that accepts the concatenation of the languages of the given automata.
static Automaton	Operations.concatenate(List<Automaton> l) Returns an automaton that accepts the concatenation of the languages of the given automata.
Automaton	UTF32ToUTF8.convert(Automaton utf32) Converts an incoming utf32 automaton to an equivalent utf8 one.
static Automaton	Operations.determinize(Automaton a, int maxDeterminizedStates) Determinizes the given automaton.
Automaton	Automaton.Builder.finish() Compiles all added states and transitions into a new Automaton and returns it.
Automaton	TooComplexToDeterminizeException.getAutomaton() Returns the automaton that caused this exception, if any.
Automaton	AutomatonProvider.getAutomaton(String name) Returns automaton of the given name.
static Automaton	Operations.intersection(Automaton a1, Automaton a2) Returns an automaton that accepts the intersection of the languages of the given automata.
static Automaton	Automata.makeAnyBinary() Returns a new (deterministic) automaton that accepts all binary terms.
static Automaton	Automata.makeAnyChar() Returns a new (deterministic) automaton that accepts any single codepoint.
static Automaton	Automata.makeAnyString() Returns a new (deterministic) automaton that accepts all strings.
static Automaton	Automata.makeBinary(BytesRef term) Returns a new (deterministic) automaton that accepts the single given binary term.
static Automaton	Automata.makeBinaryInterval(BytesRef min, boolean minInclusive, BytesRef max, boolean maxInclusive) Creates a new deterministic, minimal automaton accepting all binary terms in the specified interval.
static Automaton	Automata.makeChar(int c) Returns a new (deterministic) automaton that accepts a single codepoint of the given value.
static Automaton	Automata.makeCharRange(int min, int max) Returns a new (deterministic) automaton that accepts a single codepoint whose value is in the given interval (including both end points).
static Automaton	Automata.makeDecimalInterval(int min, int max, int digits) Returns a new automaton that accepts strings representing decimal (base 10) non-negative integers in the given interval.
static Automaton	Automata.makeEmpty() Returns a new (deterministic) automaton with the empty language.
static Automaton	Automata.makeEmptyString() Returns a new (deterministic) automaton that accepts only the empty string.
static Automaton	Automata.makeString(int[] word, int offset, int length) Returns a new (deterministic) automaton that accepts the single given string from the specified unicode code points.
static Automaton	Automata.makeString(String s) Returns a new (deterministic) automaton that accepts the single given string.
static Automaton	Automata.makeStringUnion(Collection<BytesRef> utf8Strings) Returns a new (deterministic and minimal) automaton that accepts the union of the given collection of BytesRefs representing UTF-8 encoded strings.
static Automaton	MinimizationOperations.minimize(Automaton a, int maxDeterminizedStates) Minimizes (and determinizes if not already deterministic) the given automaton using Hopcroft's algorithm.
static Automaton	Operations.minus(Automaton a1, Automaton a2, int maxDeterminizedStates) Returns a (deterministic) automaton that accepts the intersection of the language of a1 and the complement of the language of a2.
static Automaton	Operations.optional(Automaton a) Returns an automaton that accepts the union of the empty string and the language of the given automaton.
static Automaton	Operations.removeDeadStates(Automaton a) Removes transitions to dead states (a state is "dead" if it is not reachable from the initial state or no accept state is reachable from it.)
static Automaton	Operations.repeat(Automaton a) Returns an automaton that accepts the Kleene star (zero or more concatenated repetitions) of the language of the given automaton.
static Automaton	Operations.repeat(Automaton a, int count) Returns an automaton that accepts min or more concatenated repetitions of the language of the given automaton.
static Automaton	Operations.repeat(Automaton a, int min, int max) Returns an automaton that accepts between min and max (including both) concatenated repetitions of the language of the given automaton.
static Automaton	Operations.reverse(Automaton a) Returns an automaton accepting the reverse language.
Automaton	RegExp.toAutomaton() Constructs new Automaton from this RegExp.
Automaton	RegExp.toAutomaton(AutomatonProvider automaton_provider, int maxDeterminizedStates) Constructs new Automaton from this RegExp.
Automaton	LevenshteinAutomata.toAutomaton(int n) Compute a DFA that accepts all strings within an edit distance of n.
Automaton	RegExp.toAutomaton(int maxDeterminizedStates) Constructs new Automaton from this RegExp.
Automaton	LevenshteinAutomata.toAutomaton(int n, String prefix) Compute a DFA that accepts all strings within an edit distance of n, matching the specified exact prefix.
Automaton	RegExp.toAutomaton(Map<String,Automaton> automata, int maxDeterminizedStates) Constructs new Automaton from this RegExp.
static Automaton	Operations.union(Automaton a1, Automaton a2) Returns an automaton that accepts the union of the languages of the given automata.
static Automaton	Operations.union(Collection<Automaton> l) Returns an automaton that accepts the union of the languages of the given automata.

Methods in org.apache.lucene.util.automaton with parameters of type Automaton

Modifier and Type	Method and Description
static int	Automata.appendAnyChar(Automaton a, int state) Accept any single character starting from the specified state, returning the new state
static int	Automata.appendChar(Automaton a, int state, int c) Appends the specified character to the specified state, returning a new state.
static Automaton	Operations.complement(Automaton a, int maxDeterminizedStates) Returns a (deterministic) automaton that accepts the complement of the language of the given automaton.
static Automaton	Operations.concatenate(Automaton a1, Automaton a2) Returns an automaton that accepts the concatenation of the languages of the given automata.
Automaton	UTF32ToUTF8.convert(Automaton utf32) Converts an incoming utf32 automaton to an equivalent utf8 one.
void	Automaton.copy(Automaton other) Copies over all states/transitions from other.
void	Automaton.Builder.copy(Automaton other) Copies over all states/transitions from other.
void	Automaton.Builder.copyStates(Automaton other) Copies over all states from other.
static Automaton	Operations.determinize(Automaton a, int maxDeterminizedStates) Determinizes the given automaton.
static String	Operations.getCommonPrefix(Automaton a) Returns the longest string that is a prefix of all accepted strings and visits each state at most once.
static BytesRef	Operations.getCommonPrefixBytesRef(Automaton a) Returns the longest BytesRef that is a prefix of all accepted strings and visits each state at most once.
static BytesRef	Operations.getCommonSuffixBytesRef(Automaton a, int maxDeterminizedStates) Returns the longest BytesRef that is a suffix of all accepted strings.
static IntsRef	Operations.getSingleton(Automaton a) If this automaton accepts a single input, return it.
static boolean	Operations.hasDeadStates(Automaton a) Returns true if this automaton has any states that cannot be reached from the initial state or cannot reach an accept state.
static boolean	Operations.hasDeadStatesFromInitial(Automaton a) Returns true if there are dead states reachable from an initial state.
static boolean	Operations.hasDeadStatesToAccept(Automaton a) Returns true if there are dead states that reach an accept state.
static Automaton	Operations.intersection(Automaton a1, Automaton a2) Returns an automaton that accepts the intersection of the languages of the given automata.
static boolean	Operations.isEmpty(Automaton a) Returns true if the given automaton accepts no strings.
static boolean	Operations.isFinite(Automaton a) Returns true if the language of this automaton is finite.
static boolean	Operations.isTotal(Automaton a) Returns true if the given automaton accepts all strings.
static boolean	Operations.isTotal(Automaton a, int minAlphabet, int maxAlphabet) Returns true if the given automaton accepts all strings for the specified min/max range of the alphabet.
static Automaton	MinimizationOperations.minimize(Automaton a, int maxDeterminizedStates) Minimizes (and determinizes if not already deterministic) the given automaton using Hopcroft's algorithm.
static Automaton	Operations.minus(Automaton a1, Automaton a2, int maxDeterminizedStates) Returns a (deterministic) automaton that accepts the intersection of the language of a1 and the complement of the language of a2.
static Automaton	Operations.optional(Automaton a) Returns an automaton that accepts the union of the empty string and the language of the given automaton.
static Automaton	Operations.removeDeadStates(Automaton a) Removes transitions to dead states (a state is "dead" if it is not reachable from the initial state or no accept state is reachable from it.)
static Automaton	Operations.repeat(Automaton a) Returns an automaton that accepts the Kleene star (zero or more concatenated repetitions) of the language of the given automaton.
static Automaton	Operations.repeat(Automaton a, int count) Returns an automaton that accepts min or more concatenated repetitions of the language of the given automaton.
static Automaton	Operations.repeat(Automaton a, int min, int max) Returns an automaton that accepts between min and max (including both) concatenated repetitions of the language of the given automaton.
static Automaton	Operations.reverse(Automaton a) Returns an automaton accepting the reverse language.
static boolean	Operations.run(Automaton a, IntsRef s) Returns true if the given string (expressed as unicode codepoints) is accepted by the automaton.
static boolean	Operations.run(Automaton a, String s) Returns true if the given string is accepted by the automaton.
static boolean	Operations.sameLanguage(Automaton a1, Automaton a2) Returns true if these two automata accept exactly the same language.
static boolean	Operations.subsetOf(Automaton a1, Automaton a2) Returns true if the language of a1 is a subset of the language of a2.
static int[]	Operations.topoSortStates(Automaton a) Returns the topological sort of all states reachable from the initial state.
static Automaton	Operations.union(Automaton a1, Automaton a2) Returns an automaton that accepts the union of the languages of the given automata.

Method parameters in org.apache.lucene.util.automaton with type arguments of type Automaton

Modifier and Type	Method and Description
static Automaton	Operations.concatenate(List<Automaton> l) Returns an automaton that accepts the concatenation of the languages of the given automata.
Automaton	RegExp.toAutomaton(Map<String,Automaton> automata, int maxDeterminizedStates) Constructs new Automaton from this RegExp.
static Automaton	Operations.union(Collection<Automaton> l) Returns an automaton that accepts the union of the languages of the given automata.

Constructors in org.apache.lucene.util.automaton with parameters of type Automaton

Constructor and Description
ByteRunAutomaton(Automaton a) Converts incoming automaton to byte-based (UTF32ToUTF8) first
ByteRunAutomaton(Automaton a, boolean isBinary, int maxDeterminizedStates) expert: if isBinary is true, the input is already byte-based
CharacterRunAutomaton(Automaton a) Construct with a default number of maxDeterminizedStates.
CharacterRunAutomaton(Automaton a, int maxDeterminizedStates) Construct specifying maxDeterminizedStates.
CompiledAutomaton(Automaton automaton) Create this, passing simplify=true and finite=null, so that we try to simplify the automaton and determine if it is finite.
CompiledAutomaton(Automaton automaton, Boolean finite, boolean simplify) Create this.
CompiledAutomaton(Automaton automaton, Boolean finite, boolean simplify, int maxDeterminizedStates, boolean isBinary) Create this.
FiniteStringsIterator(Automaton a) Constructor.
FiniteStringsIterator(Automaton a, int startState, int endState) Constructor.
LimitedFiniteStringsIterator(Automaton a, int limit) Constructor.
RunAutomaton(Automaton a, int alphabetSize) Constructs a new RunAutomaton from a deterministic Automaton.
RunAutomaton(Automaton a, int alphabetSize, int maxDeterminizedStates) Constructs a new RunAutomaton from a deterministic Automaton.
TooComplexToDeterminizeException(Automaton automaton, int maxDeterminizedStates) Use this constructor when the automaton failed to determinize.