Application: gvSIG desktop » gvSIG tools: HyperLink

/* 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.

 *

 */

package org.gvsig.hyperlink.app.extension.layers;

import java.awt.geom.Point2D;

import java.io.File;

import java.net.URI;

import java.net.URISyntaxException;

import java.util.ArrayList;

import java.util.Map;

import org.gvsig.andami.PluginServices;

import org.gvsig.andami.messages.NotificationManager;

import org.gvsig.fmap.dal.DataTypes;

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

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

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

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

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

import org.gvsig.fmap.mapcontext.layers.FLayer;

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

import org.gvsig.tools.dispose.DisposableIterator;

public class VectLayerManager implements ILinkLayerManager {

    private FLyrVect _layer = null;

    public URI[] getLink(Point2D point,

        double tolerance,

        String fieldName,

        String fileExtension) {

        FLyrVect lyrVect = (FLyrVect) _layer;

        ArrayList<URI> uriList = new ArrayList();

        FeatureSet features;

        FeatureType featureType;

        try {

            // FIXME: Habr? que ver como lo hacemos con las capas multigeometr?a

            featureType = _layer.getFeatureStore().getDefaultFeatureType();

            features = lyrVect.queryByPoint(point, tolerance, featureType);

        } catch (Exception e) {

            return null;

        }

        // Si el conjunto creado no est? vac?o creamos el vector de URLS

        // correspondientes

        // a la consulta que hemos hecho.

        if (features != null) {

            try {

                DisposableIterator it;

                it = features.fastIterator();

                Object val = null;

                while (it.hasNext()) {

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

                    val = feature.get(fieldName);

                    String fieldValue = (val == null) ? "" : val.toString();

                    if (!fieldValue.equals("")) {

                        try {

                            uriList.add(getURI(fieldValue, fileExtension));

                        } catch (URISyntaxException e) {

                            NotificationManager.addWarning(PluginServices.getText(this,

                                "Hyperlink__field_value_is_not_valid_file"),

                                e);

                        }

                    }

                }

                it.dispose();

                return (URI[]) uriList.toArray(new URI[0]);

            } catch (DataException e1) {

                PluginServices.getLogger()

                    .error("Hyperlink__cant_get_the_iterator", e1);

            }

        }

        return new URI[0];

    }

    protected URI getURI(String baseURI, String extension) throws URISyntaxException {

        String stringURI;

        if (extension.equals("")) {

            stringURI = baseURI;

        } else

            if (extension.startsWith(".")) {

                stringURI = baseURI + extension;

            } else {

                stringURI = baseURI + "." + extension;

            }

        File file = new File(stringURI);

        if (file.exists()) {

            return file.toURI();

        } else {

            return new URI(stringURI);

        }

    }

    public FLayer getLayer() {

        return _layer;

    }

    public void setLayer(FLayer layer) throws IncompatibleLayerException {

        try {

            _layer = (FLyrVect) layer;

        } catch (ClassCastException ex) {

            throw new IncompatibleLayerException(ex);

        }

    }

    public Object create() {

        return this;

    }

    public Object create(Object[] args) {

        return this;

    }

    public Object create(Map args) {

        return this;

    }

    public URI[][] getLink(Point2D point,

        double tolerance,

        String[] fieldName,

        String fileExtension) {

        FLyrVect lyrVect = (FLyrVect) _layer;

        FeatureSet features;

        FeatureType featureType;

        URI uri[][] = null;

        try {

            // FIXME: Habr? que ver como lo hacemos con las capas multigeometr?a

            featureType = _layer.getFeatureStore().getDefaultFeatureType();

            features = lyrVect.queryByPoint(point, tolerance, featureType);

        } catch (Exception e) {

            return null;

        }

        // Si el conjunto creado no est? vac?o creamos el vector de URLS

        // correspondientes

        // a la consulta que hemos hecho.

        if (features != null) {

            try {

                // Creo el vector de URL?s con la misma longitud que features

                uri = new URI[(int) features.getSize()][fieldName.length];

                // Recorremos las features siguiendo el ejemplo de la clase que

                // se

                // proporciona en la API

                int count = 0;

                DisposableIterator it = features.fastIterator();

                while (it.hasNext()) {

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

                    for (int fieldCount = 0; fieldCount < fieldName.length; fieldCount++) {

                        // get the field ID using the field name

                        String auxField =

                            feat.get(fieldName[fieldCount]).toString();

                        if (auxField != null) {

                            if (auxField.startsWith("http:/")) {

                                try {

                                    uri[count][fieldCount] = new URI(auxField);

                                } catch (URISyntaxException e) {

                                    PluginServices.getLogger().error("", e);

                                }

                            } else {

                                File file = new File(auxField);

                                uri[count][fieldCount] = file.toURI();

                            }

                        } else {

                            PluginServices.getLogger()

                                .error("Hyperlink error. Field "

                                    + fieldName[fieldCount] + "doesn't exist!!");

                            uri[count][fieldCount] = null;

                        }

                    }

                    count++;

                }

                it.dispose();

                return uri;

            } catch (DataException e) {

                PluginServices.getLogger().error("", e);

            }

        }

        return new URI[0][0];

    }

    public String[] getFieldCandidates() {

        try {

            FeatureType featureType =

                _layer.getFeatureStore().getDefaultFeatureType();

            ArrayList<String> fields = new ArrayList<String>();

            FeatureAttributeDescriptor[] descriptors =

                featureType.getAttributeDescriptors();

            for (int i = 0; i < descriptors.length; i++) {

                FeatureAttributeDescriptor descriptor = descriptors[i];

                if (  !(descriptor.getDataType().isObject() || 

                    descriptor.getDataType().getType() == DataTypes.GEOMETRY) ) {

                    fields.add(descriptor.getName());

                }

            }

            return (String[]) fields.toArray(new String[0]);

        } catch (DataException e) {

            NotificationManager.addError(PluginServices.getText(this,

                "Error_reading_layer_fields"), e);

        }

        return new String[0];

    }

}