org.gvsig.fmap.dal.feature
Interface FeatureIndexes

public interface FeatureIndexes

This interface gives access to a store's local indexes and also provides a delegated method for obtaining a resulting FeatureSet using the appropriate index given an Evaluator.

Author:

jyarza

Method Summary

boolean	areValid() Returns if all the indexes are valid and might be used to get Features.
FeatureIndex	getFeatureIndex(String name) Returns a FeatureIndex given the name with which it was created.
FeatureSet	getFeatureSet(Evaluator evaluator) Using the given evaluator attributes, choose and use an appropriate index to obtain a FeatureSet.
Iterator	iterator() Returns an iterator over the indexes.

Method Detail

getFeatureIndex

FeatureIndex getFeatureIndex(String name)

Returns a FeatureIndex given the name with which it was created.

Parameters:

name - FeatureIndex name

Returns:

FeatureIndex or null if it is not found.

getFeatureSet

FeatureSet getFeatureSet(Evaluator evaluator)
                         throws FeatureIndexException

Using the given evaluator attributes, choose and use an appropriate index to obtain a FeatureSet. If no index can be applied, then this method returns null

Parameters:

evaluator -

Returns:

FeatureSet or null if could not find any appropriate index.

Throws:

FeatureIndexException

iterator

Iterator iterator()

Returns an iterator over the indexes. Elements are of type FeatureIndex.

Returns:

Iterator over the FeatureIndex(es).

areValid

boolean areValid()

Returns if all the indexes are valid and might be used to get Features.

Returns:

if the indexes are valid