Application: gvSIG desktop

/* gvSIG. Geographic Information System of the Valencian Government

*

* Copyright (C) 2007-2008 Infrastructures and Transports Department

* of the Valencian Government (CIT)

* 

* This program is free software; you can redistribute it and/or

* modify it under the terms of the GNU General Public License

* as published by the Free Software Foundation; either version 2

* of the License, or (at your option) any later version.

* 

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

* GNU General Public License for more details.

* 

* You should have received a copy of the GNU General Public License

* along with this program; if not, write to the Free Software

* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 

* MA  02110-1301, USA.

* 

*/

/*

* AUTHORS (In addition to CIT):

* 2008 {{Company}}   {{Task}}

*/

package org.gvsig.fmap.dal.feature;

import java.util.List;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.feature.exception.FeatureIndexException;

/**

 * This interface represents a local index on feature based data.

 * 

 * All indexes are stored in local files. Creating server 

 * side indexes is not supported.

 * 

 * 

 * @author jyarza

 *

 */

public interface FeatureIndex {

        /** Index name */

        public String getName();

        /** Attribute names */

        public List getAttributeNames();

        /** Data type */

        public int getDataType();

        /**

         * Inserts a Feature in the index.

         * The Feature must contain a column that matches this index's column (name and data type)

         * @param feat

         */

    public void insert(Feature feat) throws DataException;

        /**

         * Inserts a FeatureSet into this index

         * FeatureType is not checked so it will accept any FeatureType

         * as long as exists a column with a valid name

         */        

        public void insert(FeatureSet data) throws DataException;

        /**

         * Deletes a Feature in the index.

         * The Feature must contain a column that matches this index's column (name and data type)

         * @param feat

         */

    public void delete(Feature feat) throws DataException;

        /**

         * Deletes a FeatureSet from this index

         * FeatureType is not checked so it will accept any FeatureType

         * as long as exists a column with a valid name

         */        

        public void delete(FeatureSet data) throws FeatureIndexException;        

        /**

         * Returns a FeatureSet with the set of values that match the given value. 

         * 

         * @param value 

         *                         is the value to match.

         * @return

         *                 a FeatureSet containing the values in the index that match the given value.

         * 

         * @throws FeatureIndexException

         */

        public FeatureSet getMatchFeatureSet(Object value)

                        throws FeatureIndexException;

        /**

         * Returns a FeatureSet with the set of values that belong to the range defined by value1 and value2.

         * 

         * @param value1

         *                         range lower limit.

         * 

         * @param value2

         *                         range higher limit.

         * 

         * @return

         *                 a FeatureSet with the set of values that belong to the range defined by value1 and value2.

         * 

         * @throws FeatureIndexException

         */

        public FeatureSet getRangeFeatureSet(Object value1, Object value2)

                        throws FeatureIndexException;

        /**

         * Returns a FeatureSet with the set of up to <code>count</code> values that are nearest to the given value.

         * 

         * @param count

         *                         maximum number of values that their resulting FeatureSet will return

         * 

         * @param value

         *                         the value around which the nearest <code>count</code> will be looked up.

         * 

         * @return

         *                 a FeatureSet with the set of up to <code>count</code> values that are nearest to the given value.

         * 

         * @throws FeatureIndexException

         */

        public FeatureSet getNearestFeatureSet(int count, Object value)

                        throws FeatureIndexException;

        /**

         * Returns a FeatureSet with the set of up to <code>count</code> values whose distance to the given value

         * is not greater than <code>tolerance</code>

         * 

         * @param count

         *                         maximum number of values that their resulting FeatureSet will return

         * 

         * @param value

         *                         the value around which the nearest <code>count</code> will be looked up.

         * 

         * @param tolerance

         *                         maximum distance from the given value.

         * 

         * @return

         *                 a FeatureSet with the set of up to <code>count</code> values that are nearest to the given value.

         * 

         * @throws FeatureIndexException

         */

        public FeatureSet getNearestFeatureSet(int count, Object value, 

                        Object tolerance) throws FeatureIndexException;

    /**

     * Returns if the index is valid and might be used to get Features.

     * 

     * @return if the index is valid

     */

    public boolean isValid();

    /**

     * Returns if the index is in the process of being filled with the Features

     * of a store.

     * 

     * @return if the index is filling with data

     */

    public boolean isFilling();

}