Application: gvSIG desktop

package org.gvsig.fmap.dal.feature.impl;

import java.util.List;

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

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

import org.gvsig.fmap.dal.feature.spi.FeatureReferenceProviderServices;

import org.gvsig.fmap.dal.feature.spi.index.AbstractFeatureIndexProvider;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.SpatialIndex;

import org.gvsig.fmap.geom.primitive.Envelope;

import org.gvsig.fmap.geom.primitive.NullGeometry;

public class MemorySpatialIndexProvider extends AbstractFeatureIndexProvider {

        public static final String NAME = "MemorySpatialIndexProvider";

        private SpatialIndex index = null;

        public MemorySpatialIndexProvider() {

        }

    public void initialize() {

            try {

                        this.index = GeometryLocator.getGeometryManager().createDefaultMemorySpatialIndex();

                } catch (Exception e) {

                        throw new RuntimeException();

                }

    }

    public void delete(Object o, FeatureReferenceProviderServices fref) {

        Geometry geom = (Geometry) o;

        this.index.remove(geom, fref.getOID());

    }

    public void insert(Object o, FeatureReferenceProviderServices fref) {

        if (o == null || o instanceof NullGeometry) {

            return;

        }

        Geometry geom = (Geometry) o;

        this.index.insert(geom, fref.getOID());

    }

    public List match(Object value) throws FeatureIndexException {

        Envelope env = null;

        if (value instanceof Envelope) {

            env = (Envelope) value;

        } else {

            if (value instanceof Geometry) {

                env = ((Geometry) value).getEnvelope();

            }

        }

        return new LongList(this.index.queryAsList(env));

    }

    public List match(Object min, Object max) {

        throw new UnsupportedOperationException(

            "Can't perform this kind of search.");

    }

    public List nearest(int count, Object value) throws FeatureIndexException {

        throw new UnsupportedOperationException(

            "Can't perform this kind of search.");

    }

    public boolean isMatchSupported() {

        return true;

    }

    public boolean isNearestSupported() {

        return false;

    }

    public boolean isNearestToleranceSupported() {

        return false;

    }

    public boolean isRangeSupported() {

        return false;

    }

    public List nearest(int count, Object value, Object tolerance)

        throws FeatureIndexException {

        throw new UnsupportedOperationException();

    }

    public List range(Object value1, Object value2)

        throws FeatureIndexException {

        throw new UnsupportedOperationException();

    }

    public void clear() throws DataException {

        this.index.removeAll();

    }

 }