Automata (Lucene 8.9.0 API)乐学网一站式学习平台

java.lang.Object
- org.apache.lucene.util.automaton.Automata

```
public final class Automata
extends Object
```
Construction of basic automata.

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

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static int`	`appendAnyChar(Automaton a, int state)` Accept any single character starting from the specified state, returning the new state
`static int`	`appendChar(Automaton a, int state, int c)` Appends the specified character to the specified state, returning a new state.
`static Automaton`	`makeAnyBinary()` Returns a new (deterministic) automaton that accepts all binary terms.
`static Automaton`	`makeAnyChar()` Returns a new (deterministic) automaton that accepts any single codepoint.
`static Automaton`	`makeAnyString()` Returns a new (deterministic) automaton that accepts all strings.
`static Automaton`	`makeBinary(BytesRef term)` Returns a new (deterministic) automaton that accepts the single given binary term.
`static Automaton`	`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`	`makeChar(int c)` Returns a new (deterministic) automaton that accepts a single codepoint of the given value.
`static Automaton`	`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`	`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`	`makeEmpty()` Returns a new (deterministic) automaton with the empty language.
`static Automaton`	`makeEmptyString()` Returns a new (deterministic) automaton that accepts only the empty string.
`static Automaton`	`makeNonEmptyBinary()` Returns a new (deterministic) automaton that accepts all binary terms except the empty string.
`static Automaton`	`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`	`makeString(String s)` Returns a new (deterministic) automaton that accepts the single given string.
`static Automaton`	`makeStringUnion(Collection<BytesRef> utf8Strings)` Returns a new (deterministic and minimal) automaton that accepts the union of the given collection of `BytesRef`s representing UTF-8 encoded strings.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - makeEmpty
```
public static Automaton makeEmpty()
```
    Returns a new (deterministic) automaton with the empty language.
  - makeEmptyString
```
public static Automaton makeEmptyString()
```
    Returns a new (deterministic) automaton that accepts only the empty string.
  - makeAnyString
```
public static Automaton makeAnyString()
```
    Returns a new (deterministic) automaton that accepts all strings.
  - makeAnyBinary
```
public static Automaton makeAnyBinary()
```
    Returns a new (deterministic) automaton that accepts all binary terms.
  - makeNonEmptyBinary
```
public static Automaton makeNonEmptyBinary()
```
    Returns a new (deterministic) automaton that accepts all binary terms except the empty string.
  - makeAnyChar
```
public static Automaton makeAnyChar()
```
    Returns a new (deterministic) automaton that accepts any single codepoint.
  - appendAnyChar
```
public static int appendAnyChar(Automaton a,
                                int state)
```
    Accept any single character starting from the specified state, returning the new state
  - makeChar
```
public static Automaton makeChar(int c)
```
    Returns a new (deterministic) automaton that accepts a single codepoint of the given value.
  - appendChar
```
public static int appendChar(Automaton a,
                             int state,
                             int c)
```
    Appends the specified character to the specified state, returning a new state.
  - makeCharRange
```
public static Automaton 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).
  - makeBinaryInterval
```
public static Automaton makeBinaryInterval(BytesRef min,
                                           boolean minInclusive,
                                           BytesRef max,
                                           boolean maxInclusive)
```
    Creates a new deterministic, minimal automaton accepting all binary terms in the specified interval. Note that unlike makeDecimalInterval(int, int, int), the returned automaton is infinite, because terms behave like floating point numbers leading with a decimal point. However, in the special case where min == max, and both are inclusive, the automata will be finite and accept exactly one term.
  - makeDecimalInterval
```
public static Automaton makeDecimalInterval(int min,
                                            int max,
                                            int digits)
                                     throws IllegalArgumentException
```
    Returns a new automaton that accepts strings representing decimal (base 10) non-negative integers in the given interval.
    
    Parameters:
    
    min - minimal value of interval
    
    max - maximal value of interval (both end points are included in the interval)
    
    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 (any number of leading 0s is accepted)
    
    Throws:
    
    IllegalArgumentException - if min > max or if numbers in the interval cannot be expressed with the given fixed number of digits
  - makeString
```
public static Automaton makeString(String s)
```
    Returns a new (deterministic) automaton that accepts the single given string.
  - makeBinary
```
public static Automaton makeBinary(BytesRef term)
```
    Returns a new (deterministic) automaton that accepts the single given binary term.
  - makeString
```
public static Automaton makeString(int[] word,
                                   int offset,
                                   int length)
```
    Returns a new (deterministic) automaton that accepts the single given string from the specified unicode code points.
  - makeStringUnion
```
public static Automaton 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.
    
    Parameters:
    
    utf8Strings - The input strings, UTF-8 encoded. The collection must be in sorted order.
    
    Returns:
    
    An Automaton accepting all input strings. The resulting automaton is codepoint based (full unicode codepoints on transitions).

Class Automata

Method Summary

Methods inherited from class java.lang.Object

Method Detail

makeEmpty

makeEmptyString

makeAnyString

makeAnyBinary

makeNonEmptyBinary

makeAnyChar

appendAnyChar

makeChar

appendChar

makeCharRange

makeBinaryInterval

makeDecimalInterval

makeString

makeBinary

makeString

makeStringUnion