org.apache.excalibur.source.impl.validity
Class DeferredAggregatedValidity

java.lang.Object
  org.apache.excalibur.source.impl.validity.AbstractAggregatedValidity
      org.apache.excalibur.source.impl.validity.DeferredAggregatedValidity

All Implemented Interfaces:

java.io.Serializable, SourceValidity

public final class DeferredAggregatedValidity

extends AbstractAggregatedValidity

implements SourceValidity

A validation object using a List. This validity object does the same as the AggregatedValidity object, but the contained validity objects are only fetched when required.

Version:

CVS $Revision: 1.4 $ $Date: 2004/02/28 11:47:17 $

Author:

Avalon Development Team

See Also:

Serialized Form

Field Summary

Fields inherited from interface org.apache.excalibur.source.SourceValidity

INVALID, UNKNOWN, UNKNWON, VALID

Constructor Summary

DeferredAggregatedValidity()

Method Summary

void	add(DeferredValidity validity)
int	isValid() Check if the component is still valid.
int	isValid(SourceValidity validity) Check if the component is still valid.
java.lang.String	toString()

Methods inherited from class org.apache.excalibur.source.impl.validity.AbstractAggregatedValidity

add, getValidities

Methods inherited from class java.lang.Object

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

Constructor Detail

DeferredAggregatedValidity

public DeferredAggregatedValidity()

Method Detail

add

public void add(DeferredValidity validity)

isValid

public int isValid()

Check if the component is still valid. If 0 is returned the isValid(SourceValidity) must be called afterwards! If -1 is returned, the component is not valid anymore and if +1 is returnd, the component is valid.

Specified by:

isValid in interface SourceValidity

isValid

public int isValid(SourceValidity validity)

Description copied from interface: SourceValidity

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.

Specified by:

isValid in interface SourceValidity

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.

toString

public java.lang.String toString()

Overrides:

toString in class AbstractAggregatedValidity