root / branches / dal_time_support / libraries / libFMap_dal / src / org / gvsig / fmap / dal / feature / FeatureIndexes.java @ 36417
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/* gvSIG. Geographic Information System of the Valencian Government
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*
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* Copyright (C) 2007-2008 Infrastructures and Transports Department
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* of the Valencian Government (CIT)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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/*
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* AUTHORS (In addition to CIT):
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* 2008 {{Company}} {{Task}}
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*/
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package org.gvsig.fmap.dal.feature; |
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import java.util.Iterator; |
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import org.gvsig.fmap.dal.feature.exception.FeatureIndexException; |
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import org.gvsig.tools.evaluator.Evaluator; |
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/**
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* This interface gives access to a store's local indexes
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* and also provides a delegated method for obtaining a
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* resulting {@link FeatureSet} using the appropriate
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* index given an {@link Evaluator}.
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*
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*
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* @author jyarza
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*
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*/
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public interface FeatureIndexes { |
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/**
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* Returns a FeatureIndex given the name with which it was created.
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*
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* @param name FeatureIndex name
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*
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* @return FeatureIndex or null if it is not found.
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*/
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public FeatureIndex getFeatureIndex(String name); |
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/**
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* Using the given evaluator attributes, choose and use an appropriate index
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* to obtain a FeatureSet. If no index can be applied, then this method
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* returns null
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*
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* @param evaluator
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* @return FeatureSet or null if could not find any appropriate index.
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* @throws FeatureIndexException
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*
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*/
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public FeatureSet getFeatureSet(Evaluator evaluator)
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throws FeatureIndexException;
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/**
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* Returns an iterator over the indexes. Elements are of type FeatureIndex.
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*
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* @return Iterator over the FeatureIndex(es).
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*/
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public Iterator iterator(); |
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/**
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* Returns if all the indexes are valid and might be used to get Features.
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*
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* @return if the indexes are valid
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*/
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public boolean areValid(); |
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} |