com.cronutils.model.field.expression

Class FieldExpression

java.lang.Object

com.cronutils.model.field.expression.FieldExpression

Direct Known Subclasses:

Always, And, Between, Every, On, QuestionMark

public abstract class FieldExpression
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
protected FieldConstraints	constraints

Constructor Summary

Constructors

Constructor and Description
FieldExpression(FieldConstraints constraints)

Method Summary

Modifier and Type	Method and Description
FieldExpression	accept(FieldExpressionVisitor visitor) Accept a visitor to perform some action on the instance.
And	and(FieldExpression exp)
abstract String	asString() Represents FieldExpression as string
protected FieldConstraints	getConstraints()
protected FieldValue	validate(FieldValue fieldValue) Validates given FieldValue.

Methods inherited from class java.lang.Object

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

Field Detail

constraints

protected FieldConstraints constraints

Constructor Detail

FieldExpression

public FieldExpression(FieldConstraints constraints)

Method Detail

and

public And and(FieldExpression exp)

getConstraints

protected FieldConstraints getConstraints()

validate

protected FieldValue validate(FieldValue fieldValue)

Validates given FieldValue. If an IntegerFieldValue instance, will check if is in allowed range. If a SpecialCharFieldValue instance, will check if SpecialChar is allowed.

Parameters:

fieldValue - - FieldValue instance, never null

Returns:

same FieldValue instance as parameter, never null

asString

public abstract String asString()

Represents FieldExpression as string

Returns:

String representation, never null.

accept

public final FieldExpression accept(FieldExpressionVisitor visitor)

Accept a visitor to perform some action on the instance. Current instance is cloned, so that we ensure immutability. Clone of this instance is returned after visitor.visit(clone) was invoked.

Parameters:

visitor - - FieldExpressionVisitor instance, never null

Returns:

FieldExpression copied instance with visitor action performed.