com.cronutils.model.time.generator

Class FieldValueGenerator

java.lang.Object

com.cronutils.model.time.generator.FieldValueGenerator

public abstract class FieldValueGenerator
extends Object

Provides a strategy to generate values. Strategy is valid for 0+ numbers

Field Summary

Fields

Modifier and Type	Field and Description
protected FieldExpression	expression
protected static int	NO_VALUE

Constructor Summary

Constructors

Constructor and Description
FieldValueGenerator(FieldExpression expression)

Method Summary

Modifier and Type	Method and Description
List<Integer>	generateCandidates(int start, int end)
protected abstract List<Integer>	generateCandidatesNotIncludingIntervalExtremes(int start, int end)
abstract int	generateNextValue(int reference) Generates next valid value from reference
abstract int	generatePreviousValue(int reference) Generates previous valid value from reference
abstract boolean	isMatch(int value)
protected abstract boolean	matchesFieldExpressionClass(FieldExpression fieldExpression)

Methods inherited from class java.lang.Object

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

Field Detail

NO_VALUE

protected static int NO_VALUE

expression

protected FieldExpression expression

Constructor Detail

FieldValueGenerator

public FieldValueGenerator(FieldExpression expression)

Method Detail

generateNextValue

public abstract int generateNextValue(int reference)
                               throws NoSuchValueException

Generates next valid value from reference

Parameters:

reference - - reference value

Returns:

generated value - Integer

Throws:

NoSuchValueException - - if there is no next value

generatePreviousValue

public abstract int generatePreviousValue(int reference)
                                   throws NoSuchValueException

Generates previous valid value from reference

Parameters:

reference - - reference value

Returns:

generated value - Integer

Throws:

NoSuchValueException - - if there is no previous value

generateCandidatesNotIncludingIntervalExtremes

protected abstract List<Integer> generateCandidatesNotIncludingIntervalExtremes(int start,
                                                                                int end)

isMatch

public abstract boolean isMatch(int value)

generateCandidates

public final List<Integer> generateCandidates(int start,
                                              int end)

matchesFieldExpressionClass

protected abstract boolean matchesFieldExpressionClass(FieldExpression fieldExpression)