org.gvsig.fmap.dal.feature.impl

Class DefaultFeatureIndexes

java.lang.Object

org.gvsig.fmap.dal.feature.impl.DefaultFeatureIndexes

All Implemented Interfaces:

FeatureIndexes

public class DefaultFeatureIndexes
extends Object
implements FeatureIndexes

This class provides access to a FeatureStore local indexes and also decides which index to use given an evaluator containing the filter expression.

Constructor Summary

Constructors

Constructor and Description
DefaultFeatureIndexes(DefaultFeatureStore store) Creates an empty DataIndexes for the given FeatureStore

Method Summary

Methods

Modifier and Type	Method and Description
void	addIndex(FeatureIndexProviderServices index)
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.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultFeatureIndexes

public DefaultFeatureIndexes(DefaultFeatureStore store)
                      throws DataException

Creates an empty DataIndexes for the given FeatureStore

Parameters:

store - FeatureStore to whom this belongs

Throws:

DataException

Method Detail

getFeatureIndex

public FeatureIndex getFeatureIndex(String name)

Description copied from interface: FeatureIndexes

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

Specified by:

getFeatureIndex in interface FeatureIndexes

Parameters:

name - FeatureIndex name

Returns:

FeatureIndex or null if it is not found.

addIndex

public void addIndex(FeatureIndexProviderServices index)

iterator

public Iterator iterator()

Description copied from interface: FeatureIndexes

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

Specified by:

iterator in interface FeatureIndexes

Returns:

Iterator over the FeatureIndex(es).

getFeatureSet

public 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

Specified by:

getFeatureSet in interface FeatureIndexes

Parameters:

evaluator -

Returns:

FeatureSet or null if could not find any appropriate index.

Throws:

FeatureIndexException

areValid

public boolean areValid()

Description copied from interface: FeatureIndexes

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

Specified by:

areValid in interface FeatureIndexes

Returns:

if the indexes are valid

toString

public String toString()

Overrides:

toString in class Object