org.apache.flink.cep.nfa.compiler

类 NFACompiler

java.lang.Object

org.apache.flink.cep.nfa.compiler.NFACompiler

public class NFACompiler
extends Object

Compiler class containing methods to compile a Pattern into a NFA or a NFACompiler.NFAFactory.

嵌套类概要

嵌套类

限定符和类型	类和说明
static interface	NFACompiler.NFAFactory<T> Factory interface for NFA.

字段概要

字段

限定符和类型	字段和说明
protected static String	ENDING_STATE_NAME

构造器概要

构造器

构造器和说明
NFACompiler()

方法概要

限定符和类型	方法和说明
static boolean	canProduceEmptyMatches(Pattern<?,?> pattern) Verifies if the provided pattern can possibly generate empty match.
static <T> NFACompiler.NFAFactory<T>	compileFactory(Pattern<T,?> pattern, boolean timeoutHandling) Compiles the given pattern into a NFACompiler.NFAFactory.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

ENDING_STATE_NAME

protected static final String ENDING_STATE_NAME

另请参阅:

常量字段值

构造器详细资料

NFACompiler

public NFACompiler()

方法详细资料

compileFactory

public static <T> NFACompiler.NFAFactory<T> compileFactory(Pattern<T,?> pattern,
                                                           boolean timeoutHandling)

Compiles the given pattern into a NFACompiler.NFAFactory. The NFA factory can be used to create multiple NFAs.

类型参数:

T - Type of the input events

参数:

pattern - Definition of sequence pattern

timeoutHandling - True if the NFA shall return timed out event patterns

返回:

Factory for NFAs corresponding to the given pattern

canProduceEmptyMatches

public static boolean canProduceEmptyMatches(Pattern<?,?> pattern)

Verifies if the provided pattern can possibly generate empty match. Example of patterns that can possibly generate empty matches are: A*, A?, A* B? etc.

参数:

pattern - pattern to check

返回:

true if empty match could potentially match the pattern, false otherwise