Package com.helger.base.state

Interface IChangeIndicator

All Known Implementing Classes:

ChangeWithValue, EChange

public interface IChangeIndicator

Very simple interface for an object that has changed/unchanged indication.

Author:

Philip Helger

Method Summary

Modifier and Type	Method	Description
default @NonNull EChange	and(boolean bChange)	Logical AND of this change indicator with a boolean value.
default @NonNull EChange	and(@NonNull IChangeIndicator aChange)	Logical AND of this change indicator with another one.
boolean	isChanged()
default boolean	isUnchanged()
default @NonNull EChange	or(boolean bChange)	Logical OR of this change indicator with a boolean value.
default @NonNull EChange	or(@NonNull IChangeIndicator aChange)	Logical OR of this change indicator with another one.

Method Details

isChanged

boolean isChanged()

Returns:

true if changed and false if unchanged.

isUnchanged

default boolean isUnchanged()

Returns:

true if unchanged and false if changed.

or

default @NonNull EChange or(@NonNull IChangeIndicator aChange)

Logical OR of this change indicator with another one.

Parameters:

aChange - The other change indicator. May not be null.

Returns:

EChange.CHANGED if either this or the other indicator is changed.

or

default @NonNull EChange or(boolean bChange)

Logical OR of this change indicator with a boolean value.

Parameters:

bChange - The other change value.

Returns:

EChange.CHANGED if either this indicator is changed or the passed value is true.

and

default @NonNull EChange and(@NonNull IChangeIndicator aChange)

Logical AND of this change indicator with another one.

Parameters:

aChange - The other change indicator. May not be null.

Returns:

EChange.CHANGED if both this and the other indicator are changed.

and

default @NonNull EChange and(boolean bChange)

Logical AND of this change indicator with a boolean value.

Parameters:

bChange - The other change value.

Returns:

EChange.CHANGED if both this indicator is changed and the passed value is true.