net.sf.ehcache.search
Interface Results

All Known Implementing Classes:

NullResults, ResultsImpl

public interface Results

Results object for an execution of a Query. Instances of this class are thread safe

Author:

teck, Greg Luck

Method Summary

List<Result>	all() Retrieve all of the cache results in one shot.
void	discard() Discard this query result.
boolean	hasAggregators() Whether the results contains aggregates
boolean	hasAttributes() Whether the Results have cache attributes included.
boolean	hasKeys() Whether the Results have cache keys included.
boolean	hasValues() Whether the Results have cache values included.
List<Result>	range(int start, int count) Retrieve a subset of the cache results.
int	size() Results size

Method Detail

discard

void discard()

Discard this query result. This call is not mandatory but is recommended after the caller is done with results. It can allow the cache, which may be distributed, to immediately free any resources associated with this result.

Multiple calls are ignored. Attempting to read results from this instance after this method has been called will produce SearchException

all

List<Result> all()
                 throws SearchException

Retrieve all of the cache results in one shot. For large result sets this might consume large amount of memory

Returns:

a List of all the matching cache entries

Throws:

SearchException

range

List<Result> range(int start,
                   int count)
                   throws SearchException,
                          IndexOutOfBoundsException

Retrieve a subset of the cache results. This method is useful when showing "paged" results in a user interface or simply to keep memory overhead fixed

Parameters:

start - starting index to access

count - the number of results to return

Returns:

a List of the given size. This list will be smaller than the requested size if no more results are available. If there are no more results an empty list will be returned.

Throws:

SearchException

IndexOutOfBoundsException

size

int size()

Results size

Returns:

number of results present

hasKeys

boolean hasKeys()

Whether the Results have cache keys included. If so these can be extracted from the Result object.

Returns:

true if keys are included

hasValues

boolean hasValues()

Whether the Results have cache values included. If so these can be extracted from the Result object.

Returns:

true if values are included

hasAttributes

boolean hasAttributes()

Whether the Results have cache attributes included. If so these can be extracted from the Result object.

Returns:

true if attributes are included

hasAggregators

boolean hasAggregators()

Whether the results contains aggregates

Returns:

true if this is an aggregate