Application: gvSIG desktop » gvSIG tools: Vector editing

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright ? 2007-2014 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.join;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

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.FeatureAttributeDescriptor;

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

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

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

import org.gvsig.fmap.geom.Geometry;

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

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

import org.gvsig.tools.dispose.DisposableIterator;

import org.gvsig.tools.dynobject.DynObject;

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.spi.AbstractEditingProvider;

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 JoinEditingProvider extends AbstractEditingProvider implements

    EditingProvider {

    private EditingServiceParameter selectionParameter;

    private FeatureStore featureStore;

    private FeatureSelection featureSelection;

    /**

     * Default constructor.

     *

     * @param providerServices

     *            available services for this provider

     * @param parameters

     *            of this provider

     */

    public JoinEditingProvider(DynObject parameters, ProviderServices services) {

        super(services);

        this.featureStore =

            (FeatureStore) parameters

                .getDynValue(EditingProviderFactory.FEATURE_STORE_FIELD);

        this.selectionParameter =

            new DefaultEditingServiceParameter("selection", "selection",

                TYPE.SELECTION);

    }

    public EditingServiceParameter next() {

        if (featureSelection == null) {

            return selectionParameter;

        }

        return null;

    }

    public DrawingStatus getDrawingStatus(Point mousePosition)

        throws DrawServiceException {

        return null;

    }

    public void stop() throws StopServiceException {

        featureSelection = null;

    }

    public List<EditingServiceParameter> getParameters() {

        List<EditingServiceParameter> parameters =

            new ArrayList<EditingServiceParameter>();

        parameters.add(selectionParameter);

        return parameters;

    }

    public void setValue(Object value) throws InvalidEntryException {

        EditingServiceParameter parameter = next();

        validateAndInsertValue(parameter, value);

    }

    private void validateAndInsertValue(EditingServiceParameter parameter,

        Object value) throws InvalidEntryException {

        if (parameter == selectionParameter) {

            if (value instanceof FeatureSelection) {

                FeatureSelection fSelection = (FeatureSelection) value;

                if (fSelection.getSelectedCount() > 1) {

                    DisposableIterator it = null;

                    try {

                        it = fSelection.fastIterator();

                        Feature feature = (Feature) it.next();

                        // Gets geometry type of first selected feature

                        GeometryType geometryType =

                            feature.getDefaultGeometry().getGeometryType();

                        // Iterate over remaining selected features

                        while (it.hasNext()) {

                            feature = (Feature) it.next();

                            // Remaining selected features must be the same or

                            // the equivalent multigeometry type of first

                            // feature. If one of reamining geometries is

                            // different, selection is not valid.

                            if (geometryType.isTypeOf(CURVE)

                                || geometryType.isTypeOf(MULTICURVE)) {

                                GeometryType featureGeoType =

                                    feature.getDefaultGeometry()

                                        .getGeometryType();

                                if (!(featureGeoType.isTypeOf(CURVE) || featureGeoType

                                    .isTypeOf(MULTICURVE))) {

                                    throw new InvalidEntryException(null);

                                }

                            } else if (geometryType.isTypeOf(SURFACE)

                                || geometryType.isTypeOf(SURFACE)) {

                                GeometryType featureGeoType =

                                    feature.getDefaultGeometry()

                                        .getGeometryType();

                                if (!(featureGeoType.isTypeOf(SURFACE) || featureGeoType

                                    .isTypeOf(MULTISURFACE))) {

                                    throw new InvalidEntryException(null);

                                }

                            }

                        }

                        featureSelection = fSelection;

                        return;

                    } catch (DataException e) {

                        throw new InvalidEntryException(e);

                    } finally {

                        it.dispose();

                    }

                }

            }

        }

        throw new InvalidEntryException(null);

    }

    public Geometry finish() throws FinishServiceException {

        if (featureSelection != null) {

            DisposableIterator it = null;

            Geometry joinedGeometry;

            try {

                it = featureSelection.fastIterator();

                Feature feature = (Feature) it.next();

                joinedGeometry = feature.getDefaultGeometry();

                while (it.hasNext()) {

                    Feature tmpFeature = (Feature) it.next();

                    joinedGeometry =

                        joinedGeometry.union(tmpFeature.getDefaultGeometry());

                }

            } catch (BaseException e) {

                throw new FinishServiceException(e);

            } finally {

                it.dispose();

            }

            return joinedGeometry;

        }

        return null;

    }

    @SuppressWarnings("rawtypes")

    public void finishAndStore() throws FinishServiceException {

        Geometry geometry = finish();

        final EditingProviderServices editingProviderServices =

            (EditingProviderServices) getProviderServices();

        FeatureType featureType = null;

        EditableFeature eFeature = null;

        try {

            eFeature = featureStore.createNewFeature();

            featureType = featureStore.getDefaultFeatureType();

        } catch (DataException e) {

            throw new FinishServiceException(e);

        }

        Iterator typeIterator = featureType.iterator();

        // Iterate over feature type

        while (typeIterator.hasNext()) {

            boolean insertValue = true;

            FeatureAttributeDescriptor attribute =

                (FeatureAttributeDescriptor) typeIterator.next();

            // If type is a primary key do nothing

            if (!attribute.isPrimaryKey()) {

                // int type = attribute.getType();

                DisposableIterator featureIterator = null;

                try {

                    featureIterator = featureSelection.fastIterator();

                    Feature feature = (Feature) featureIterator.next();

                    // Restart iterator and initilize it at second position

                    featureIterator.dispose();

                    featureIterator = featureSelection.fastIterator(1);

                    // Gets the type value of first feature

                    Object value = feature.get(attribute.getName());

                    // Compare first value with the rest of features. If values

                    // are different, break bucle and don't insert value at new

                    // feature.

                    if (value != null) {

                        while (featureIterator.hasNext()) {

                            Feature nextFeature =

                                (Feature) featureIterator.next();

                            Object nextValue =

                                nextFeature.get(attribute.getName());

                            if (nextValue == null || !value.equals(nextValue)) {

                                insertValue = false;

                                break;

                            }

                        }

                        if (insertValue) {

                            eFeature.set(attribute.getName(), value);

                        }

                    }

                } catch (DataException e) {

                    throw new FinishServiceException(e);

                } finally {

                    featureIterator.dispose();

                }

            }

        }

        // Inserts new feature

        eFeature.setDefaultGeometry(geometry);

        editingProviderServices.insertFeatureIntoFeatureStore(eFeature,

            featureStore);

        // Deletes selected features

        try {

            featureSelection.accept(new Visitor() {

                public void visit(Object obj) throws VisitCanceledException,

                    BaseException {

                    Feature feature = (Feature) obj;

                    editingProviderServices.deleteFeatureFromFeatureStore(

                        feature, featureStore);

                }

            });

            featureStore.getFeatureSelection().deselectAll();

        } catch (BaseException e) {

            throw new FinishServiceException(e);

        }

    }

    public void start() throws StartServiceException, InvalidEntryException {

        FeatureSelection selected = null;

        if (featureStore != null) {

            try {

                selected = featureStore.getFeatureSelection();

            } catch (DataException e) {

                throw new StartServiceException(e);

            }

            if (selected.getSelectedCount() > 1) {

                try {

                    setValue(selected);

                } catch (InvalidEntryException e) {

                    throw new InvalidEntryException(e);

                }

            }

        }

    }

    public String getName() {

        return JoinEditingProviderFactory.PROVIDER_NAME;

    }

}