org.apache.avalon.excalibur.source
Interface SourceValidity

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

NOPValidity, TimeStampValidity, AggregatedValidity

public interface SourceValidity

extends java.io.Serializable

A Validity object contains all information to check if a Source object is still valid. There are two possibilities: The validity object has all information to check by itself how long it is valid (e.g. given an expires date). The other possibility needs another (newer) validity object to compare against (e.g. to test a last modification date). To avoid testing, what the actual implementation of the validity object supports, the invocation order is to first call isValid() and only if this results in false, then to call isValid(SourceValidity). But remember to call the second isValid(SourceValidity) when false is returned by the first invocation!

Version:

CVS $Revision: 1.3 $ $Date: 2002/01/08 13:43:48 $

Author:

Carsten Ziegeler

Method Summary

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

Method Detail

isValid

public boolean isValid()

Check if the component is still valid. If false is returned the isValid(SourceValidity) must be called afterwards!

isValid

public boolean 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