Application: gvSIG desktop » gvSIG tools: Vector editing

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright ? 2007-2015 gvSIG Association

 *

 * 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.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.vectorediting.lib.prov.extendline;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.cresques.cts.IProjection;

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

import org.gvsig.fmap.dal.feature.EditableFeature;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.dal.feature.FeatureQuery;

import org.gvsig.fmap.dal.feature.FeatureSelection;

import org.gvsig.fmap.dal.feature.FeatureSet;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.fmap.geom.Geometry;

import static org.gvsig.fmap.geom.Geometry.TYPES.CURVE;

import static org.gvsig.fmap.geom.Geometry.TYPES.MULTICURVE;

import org.gvsig.fmap.geom.GeometryException;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.aggregate.MultiCurve;

import org.gvsig.fmap.geom.operation.GeometryOperationException;

import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException;

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

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

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

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

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

import org.gvsig.fmap.geom.type.GeometryType;

import org.gvsig.fmap.mapcontext.MapContext;

import org.gvsig.fmap.mapcontext.layers.vectorial.SpatialEvaluatorsFactory;

import org.gvsig.tools.dynobject.DynObject;

import org.gvsig.tools.evaluator.Evaluator;

import org.gvsig.tools.exception.BaseException;

import org.gvsig.tools.service.spi.ProviderServices;

import org.gvsig.tools.visitor.VisitCanceledException;

import org.gvsig.tools.visitor.Visitor;

import org.gvsig.vectorediting.lib.api.DrawingStatus;

import org.gvsig.vectorediting.lib.api.EditingServiceParameter;

import org.gvsig.vectorediting.lib.api.EditingServiceParameter.TYPE;

import org.gvsig.vectorediting.lib.api.exceptions.DrawServiceException;

import org.gvsig.vectorediting.lib.api.exceptions.FinishServiceException;

import org.gvsig.vectorediting.lib.api.exceptions.InvalidEntryException;

import org.gvsig.vectorediting.lib.api.exceptions.StartServiceException;

import org.gvsig.vectorediting.lib.api.exceptions.StopServiceException;

import org.gvsig.vectorediting.lib.prov.extendline.operation.ExtendLineOperation;

import org.gvsig.vectorediting.lib.prov.extendline.operation.ExtendLineOperationUtils;

import org.gvsig.vectorediting.lib.spi.AbstractEditingProvider;

import org.gvsig.vectorediting.lib.spi.DefaultDrawingStatus;

import org.gvsig.vectorediting.lib.spi.DefaultEditingServiceParameter;

import org.gvsig.vectorediting.lib.spi.EditingProvider;

import org.gvsig.vectorediting.lib.spi.EditingProviderFactory;

import org.gvsig.vectorediting.lib.spi.EditingProviderServices;

/**

 * @author llmarques

 *

 */

public class ExtendLineEditingProvider extends AbstractEditingProvider

        implements EditingProvider {

    private final int TOLERANCE_PIXELS = 3;

    private Point insertedPoint;

    private final EditingServiceParameter selectionParameter;

    private final EditingServiceParameter geometryToExtendToParameter;

    protected Map<EditingServiceParameter, Object> values;

    private final FeatureStore featureStore;

    private final MapContext mapContext;

    /**

     * Default constructor.

     *

     * @param services available services for this provider

     * @param parameters of this provider

     */

    public ExtendLineEditingProvider(ProviderServices services,

            DynObject parameters) {

        super(services);

        this.featureStore

                = (FeatureStore) parameters

                        .getDynValue(EditingProviderFactory.FEATURE_STORE_FIELD);

        this.mapContext

                = (MapContext) parameters

                        .getDynValue(EditingProviderFactory.MAPCONTEXT_FIELD);

        this.selectionParameter

                = new DefaultEditingServiceParameter("selection", "selection",

                        TYPE.SELECTION);

        this.geometryToExtendToParameter

                = new DefaultEditingServiceParameter("geometry_to_extend_to",

                        "geometry_to_extend_to", TYPE.POSITION);

    }

    public EditingServiceParameter next() {

        if (values.get(selectionParameter) == null) {

            return selectionParameter;

        } else if (values.get(geometryToExtendToParameter) == null) {

            return geometryToExtendToParameter;

        }

        return null;

    }

    @Override

    public DrawingStatus getDrawingStatus(Point mousePosition)

            throws DrawServiceException {

        FeatureSelection selection = (FeatureSelection) values.get(selectionParameter);

        if (selection != null) {

            DefaultDrawingStatus drawingStatus = new DefaultDrawingStatus();

            // We do not show the possible result when moving the mouse

            // due to possible performance problems working with databases

//            EditingProviderManager editingProviderManager

//                    = EditingProviderLocator.getProviderManager();

//            ISymbol lineSymbolEditing = editingProviderManager.getSymbol("line-symbol-editing");

//            DisposableIterator selectionIterator = null;

//            try {

//                Geometry boundaryGeometry = getGeometry(mousePosition);

//                if (boundaryGeometry != null) {

//

//                    selectionIterator = selection.fastIterator();

//                    while (selectionIterator.hasNext()) {

//                        Feature feature = (Feature) selectionIterator.next();

//

//                        Geometry geometry = feature.getDefaultGeometry();

//

//                        if (geometry instanceof MultiCurve) {

//                            MultiCurve multiCurve = (MultiCurve) geometry;

//

//                            for (int i = 0; i < multiCurve

//                                    .getPrimitivesNumber(); i++) {

//

//                                Curve curve = multiCurve.getCurveAt(i);

//                                if (!isClosed(curve)) {

//                                    Curve extendedCurve

//                                            = extendLine(mousePosition, curve, boundaryGeometry);

//                                    drawingStatus.addStatus(extendedCurve, lineSymbolEditing, "");

//                                }

//                            }

//

//                        } else if (geometry instanceof Curve) {

//                            if (!isClosed((Curve) geometry)) {

//                                Curve extendedCurve

//                                        = extendLine(mousePosition, (Curve) geometry, boundaryGeometry);

//                                drawingStatus.addStatus(extendedCurve, lineSymbolEditing, "");

//                            }

//                        }

//

//                    }

//                    DisposeUtils.dispose(selectionIterator);

//

//                }

//

//            } catch (BaseException e) {

//                throw new DrawServiceException(e);

//            } finally {

//                DisposeUtils.dispose(selectionIterator);

//            }

            return drawingStatus;

        }

        return null;

    }

    private boolean isClosed(Curve curve) {

        if (curve instanceof Arc) {

            Arc arc = (Arc) curve;

            if (arc.getInitPoint().equals(arc.getEndPoint())) {

                return true;

            }

        } else if (curve instanceof Curve) {

            Point firstPoint = curve.getVertex(0);

            Point lastPoint = curve.getVertex(curve.getNumVertices() - 1);

            if (firstPoint.equals(lastPoint)) {

                return true;

            }

        }

        return false;

    }

    private Curve extendLine(Point mousePosition, Curve curve, Geometry boundaryGeometry)

            throws GeometryOperationNotSupportedException,

            GeometryOperationException, DataException, GeometryException {

        ExtendLineOperation operation

                = ExtendLineOperationUtils.getOperation((Primitive) curve);

        return operation.extendLine(curve, mousePosition, boundaryGeometry);

    }

    public void stop() throws StopServiceException {

        values.clear();

    }

    public List<EditingServiceParameter> getParameters() {

        List<EditingServiceParameter> parameters = new ArrayList<>();

        parameters.add(selectionParameter);

        parameters.add(geometryToExtendToParameter);

        return parameters;

    }

    @Override

    public void setValue(EditingServiceParameter parameter, Object value) throws InvalidEntryException {

        validateAndInsertValue(parameter, value);

    }

    public void setValue(Object value) throws InvalidEntryException {

        EditingServiceParameter parameter = next();

        validateAndInsertValue(parameter, value);

    }

    private void validateAndInsertValue(

            final EditingServiceParameter parameter, Object value)

            throws InvalidEntryException {

        if (parameter == selectionParameter) {

            if (value instanceof FeatureSelection) {

                FeatureSelection featureSelection = (FeatureSelection) value;

                if (featureSelection.getSelectedCount() > 0) {

                    try {

                        featureSelection.accept(new Visitor() {

                            public void visit(Object obj)

                                    throws VisitCanceledException, BaseException {

                                Feature feature = (Feature) obj;

                                Geometry geometry

                                        = feature.getDefaultGeometry();

                                if (!isValidGeometryToSelect(geometry)) {

                                    throw new InvalidEntryException(null);

                                }

                            }

                        });

                        values.put(parameter, featureSelection);

                        return;

                    } catch (BaseException e) {

                        throw new InvalidEntryException(e);

                    }

                }

            }

        } else if (parameter == geometryToExtendToParameter) {

            if (value instanceof Point) {

                Point point = (Point) value;

                Geometry geometry = getGeometry(point);

                if (geometry != null) {

                    values.put(parameter, geometry);

                    insertedPoint = point;

                    return;

                }

            }

        }

        throw new InvalidEntryException(null);

    }

    private boolean isValidGeometryToSelect(Geometry geometry) {

        GeometryType geoType

                = geometry.getGeometryType();

        if (!geoType.isTypeOf(CURVE)

                && !geoType.isTypeOf(MULTICURVE)) {

            return false;

        }

        if (geoType.isTypeOf(CURVE)) {

            if (geometry instanceof Line ) {

                Line line = (Line) geometry;

                if (line.isClosed()) {

                    return false;

                }

                return true;

            }

            if (geometry instanceof Arc ) {

                Arc arc = (Arc) geometry;

                if (arc.getInitPoint().equals(arc.getEndPoint())) {

                    return false;

                }

                return true;

            }

            return false;

        }

        if (geoType.isTypeOf(MULTICURVE)) {

            MultiCurve multiCurve = (MultiCurve) geometry;

            for (Geometry geom : multiCurve) {

                if (!isValidGeometryToSelect(geom)) {

                    return false;

                }

            }

        }

        return true;

    }

    private Geometry getGeometry(Point point) {

        EditingProviderServices editingProviderServices = (EditingProviderServices) getProviderServices();

        Geometry geometry = editingProviderServices.getGeometryOfVisibleLayers(point, featureStore, mapContext);

        return geometry;

    }

    private FeatureSet getGeometryByBuffer(Geometry buffer) throws DataException {

        FeatureQuery queryByGeometry = featureStore.createFeatureQuery();

        // Get default SRS of default feature type

        IProjection defaultSRS

                = this.featureStore.getDefaultFeatureType().getDefaultSRS();

        Evaluator iee = SpatialEvaluatorsFactory.getInstance().intersects(

                buffer,

                defaultSRS,

                featureStore

        );

        queryByGeometry.setFilter(iee);

        queryByGeometry.setAttributeNames(null);

        return this.featureStore.getFeatureSet(queryByGeometry);

    }

    public Geometry finish() throws FinishServiceException {

        return null;

    }

    public void finishAndStore() throws FinishServiceException {

        FeatureSelection selection = (FeatureSelection) values.get(selectionParameter);

        Geometry geometryToExtendTo = (Geometry) values.get(geometryToExtendToParameter);

        if (selection != null && geometryToExtendTo != null) {

            try {

                selection.accept(new Visitor() {

                    @Override

                    public void visit(Object obj) throws VisitCanceledException, BaseException {

                        Feature feature = (Feature) obj;

                        Geometry geometry = feature.getDefaultGeometry();

                        EditableFeature eFeature = feature.getEditable();

                        if (geometry instanceof MultiCurve) {

                            // Create new multicurve geometry

                            MultiCurve extendedMultiCurve

                                    = createMultiCurve(geometry);

                            // Iterate overs primitives and execute extend

                            // line operation

                            MultiCurve multiCurve = (MultiCurve) geometry;

                            for (int i = 0; i < multiCurve

                                    .getPrimitivesNumber(); i++) {

                                Curve curve = multiCurve.getCurveAt(i);

                                Curve extendedCurve

                                        = extendLine(insertedPoint, curve, geometryToExtendTo);

                                extendedMultiCurve.addCurve(extendedCurve);

                            }

                            eFeature.setDefaultGeometry(extendedMultiCurve);

                        } else if (geometry instanceof Curve) {

                            Curve extendedCurve

                                    = extendLine(insertedPoint, (Curve) geometry, geometryToExtendTo);

                            eFeature.setDefaultGeometry(extendedCurve);

                        }

                        selection.update(eFeature);

                    }

                });

            } catch (BaseException e) {

                throw new FinishServiceException(e);

            }

        }

    }

    private MultiCurve createMultiCurve(Geometry geometry)

            throws FinishServiceException {

        GeometryManager geoManager = GeometryLocator.getGeometryManager();

        int subtype = geometry.getGeometryType().getSubType();

        MultiCurve extendedMultiCurve = null;

        try {

            extendedMultiCurve = geoManager.createMultiCurve(subtype);

        } catch (GeometryException e) {

            throw new FinishServiceException(e);

        }

        return extendedMultiCurve;

    }

    public void start() throws StartServiceException, InvalidEntryException {

        this.values = new HashMap<>();

        FeatureSelection selected = null;

        if (featureStore != null && values.get(selectionParameter) == null) {

            try {

                selected = featureStore.getFeatureSelection();

            } catch (DataException e) {

                throw new StartServiceException(e);

            }

            if (selected.getSelectedCount() > 0) {

                try {

                    setValue(selected);

                } catch (InvalidEntryException e) {

                    throw new InvalidEntryException(e);

                }

            }

        }

    }

    public String getName() {

        return ExtendLineEditingProviderFactory.PROVIDER_NAME;

    }

    @Override

    public Object getValue(EditingServiceParameter parameter) {

        return values!=null?values.get(parameter):null;

    }

}