Class BasicAutomata

Construction of basic automata.

This is a Lucene.NET EXPERIMENTAL API, use at your own risk

Inheritance

System.Object

BasicAutomata

Namespace: Lucene.Net.Util.Automaton

Assembly: Lucene.Net.dll

Syntax

public sealed class BasicAutomata : object

Methods

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MakeAnyChar()

Returns a new (deterministic) automaton that accepts any single codepoint.

Declaration

public static Automaton MakeAnyChar()

Returns

Type	Description
Automaton

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MakeAnyString()

Returns a new (deterministic) automaton that accepts all strings.

Declaration

public static Automaton MakeAnyString()

Returns

Type	Description
Automaton

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MakeChar(Int32)

Returns a new (deterministic) automaton that accepts a single codepoint of the given value.

Declaration

public static Automaton MakeChar(int c)

Parameters

Type	Name	Description
System.Int32	c

Returns

Type	Description
Automaton

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MakeCharRange(Int32, Int32)

Returns a new (deterministic) automaton that accepts a single codepoint whose value is in the given interval (including both end points).

Declaration

public static Automaton MakeCharRange(int min, int max)

Parameters

Type	Name	Description
System.Int32	min
System.Int32	max

Returns

Type	Description
Automaton

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MakeEmpty()

Returns a new (deterministic) automaton with the empty language.

Declaration

public static Automaton MakeEmpty()

Returns

Type	Description
Automaton

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MakeEmptyString()

Returns a new (deterministic) automaton that accepts only the empty string.

Declaration

public static Automaton MakeEmptyString()

Returns

Type	Description
Automaton

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MakeInterval(Int32, Int32, Int32)

Returns a new automaton that accepts strings representing decimal non-negative integers in the given interval.

Declaration

public static Automaton MakeInterval(int min, int max, int digits)

Parameters

Type	Name	Description
System.Int32	min	Minimal value of interval.
System.Int32	max	Maximal value of interval (both end points are included in the interval).
System.Int32	digits	If > 0, use fixed number of digits (strings must be prefixed by 0's to obtain the right length) - otherwise, the number of digits is not fixed.

Returns

Type	Description
Automaton

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MakeString(Int32[], Int32, Int32)

Declaration

public static Automaton MakeString(int[] word, int offset, int length)

Parameters

Type	Name	Description
System.Int32[]	word
System.Int32	offset
System.Int32	length

Returns

Type	Description
Automaton

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MakeString(String)

Returns a new (deterministic) automaton that accepts the single given string.

Declaration

public static Automaton MakeString(string s)

Parameters

Type	Name	Description
System.String	s

Returns

Type	Description
Automaton

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MakeStringUnion(ICollection<BytesRef>)

Returns a new (deterministic and minimal) automaton that accepts the union of the given collection of BytesRefs representing UTF-8 encoded strings.

Declaration

public static Automaton MakeStringUnion(ICollection<BytesRef> utf8Strings)

Parameters

Type	Name	Description
ICollection<BytesRef>	utf8Strings	The input strings, UTF-8 encoded. The collection must be in sorted order.

Returns

Type	Description
Automaton	An Automaton accepting all input strings. The resulting automaton is codepoint based (full unicode codepoints on transitions).