Class BasicAutomata

Construction of basic automata.

Note

This API is experimental and might change in incompatible ways in the next release.

Inheritance
System.Object
BasicAutomata
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: Lucene.Net.Util.Automaton
Assembly: Lucene.Net.dll
Syntax
public static class BasicAutomata

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
Exceptions
Type Condition
System.ArgumentException

If min > max or if numbers in the interval cannot be expressed with the given fixed number of digits.

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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
System.Collections.Generic.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).