nl.hippo.client.api.caching
Interface SourceValidity

All Superinterfaces:

Serializable

All Known Subinterfaces:

EventValidity

All Known Implementing Classes:

EventValidityImpl

public interface SourceValidity
extends Serializable

Field Summary

static int	INVALID
static int	UNKNOWN
static int	VALID

Method Summary

int	isValid() Check if the component is still valid.
int	isValid(SourceValidity newValidity) Check if the component is still valid.

Field Detail

VALID

static final int VALID

See Also:

Constant Field Values

INVALID

static final int INVALID

See Also:

Constant Field Values

UNKNOWN

static final int UNKNOWN

See Also:

Constant Field Values

Method Detail

isValid

int isValid()

Check if the component is still valid. The possible results are :

• -1: invalid. The component isn't valid anymore.
• 0: don't know. This validity should be checked against a new validity object using isValid(SourceValidity).
• 1: valid. The component is still valid.

isValid

int isValid(SourceValidity newValidity)

Check if the component is still valid. This is only true if the incoming Validity is of the same type and has the "same" values.

The invocation order is that the isValid method of the old Validity object is called with the new one as a parameter.

Returns:

-1 is returned, if the validity object is not valid anymore +1 is returned, if the validity object is still valid 0 is returned, if the validity check could not be performed. In this case, the new validity object is not usable. Examples for this are: when the validity objects have different types, or when one validity object for any reason is not able to get the required information.