eu.lod2.GeoSpatial.java Source code

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Here is the source code for eu.lod2.GeoSpatial.java

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/*
 * Copyright 2011 LOD2 consortium
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package eu.lod2;

import com.vaadin.terminal.ExternalResource;
import com.vaadin.ui.*;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Button.ClickListener;
import org.openrdf.model.Value;
import org.openrdf.model.impl.LiteralImpl;
import org.openrdf.query.*;
import org.openrdf.repository.RepositoryConnection;
import org.openrdf.repository.RepositoryException;

import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;

/**
 * The GeoSpatial allows to visualize geospatial data.
 * Deprecated temporarily
 */
//@SuppressWarnings("serial")
public class GeoSpatial extends CustomComponent {

    // reference to the global internal state
    private LOD2DemoState state;

    // fields
    private String service = "http://localhost/ssb";
    private String username = "";
    private String password = "";
    private ExportSelector3 exportGraph;
    private Embedded geobrowser;

    public GeoSpatial(LOD2DemoState st) {

        // The internal state and 
        state = st;

        initLogin();

        HorizontalLayout geospatiallayout = new HorizontalLayout();

        // Configuration form start
        // Set all properties at once for the moment.
        Form t2f = new Form();
        t2f.setDebugId(this.getClass().getSimpleName() + "_t2f");
        t2f.setCaption("Configuration");

        exportGraph = new ExportSelector3(state, true, "Select graph with geo data:");
        exportGraph.setDebugId(this.getClass().getSimpleName() + "_exportGraph");
        t2f.getLayout().addComponent(exportGraph);

        // initialize the footer area of the form
        HorizontalLayout t2ffooterlayout = new HorizontalLayout();
        t2f.setFooter(t2ffooterlayout);

        Button commitButton = new Button("Set configuration", new ClickListener() {
            public void buttonClick(ClickEvent event) {
                storeConfiguration(event);
            }
        });
        commitButton.setDebugId(this.getClass().getSimpleName() + "_commitButton");
        commitButton.setDescription("Commit the new configuration settings.");
        t2f.getFooter().addComponent(commitButton);

        geospatiallayout.addComponent(t2f);

        // Configuration form end
        geobrowser = new Embedded();
        try {

            URL url = new URL(service);
            geobrowser = new Embedded("", new ExternalResource(url));
            geobrowser.setType(Embedded.TYPE_BROWSER);
            geospatiallayout.addComponent(geobrowser);
            //geobrowser.setHeight(-1, Sizeable.UNITS_PERCENTAGE);
            geobrowser.setSizeFull();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        ;

        // The composition root MUST be set
        setCompositionRoot(geospatiallayout);
        geospatiallayout.setSizeFull();
    }

    private void storeConfiguration(ClickEvent event) {
        if (exportGraph.getExportGraph() == null || exportGraph.getExportGraph().equals("")) {
        } else {
            try {
                String encodedGraph = URLEncoder.encode(exportGraph.getExportGraph(), "UTF-8");
                URL url = new URL(service + "?default-graph-uri=" + encodedGraph);
                ExternalResource res = new ExternalResource(url);
                geobrowser.setSource(res);
                //         geobrowser.setParameter("default-graph-uri", encodedGraph);
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            } catch (MalformedURLException e) {
                e.printStackTrace();
            }
            ;
        }

    };

    // propagate the information of one tab to another.
    public void setDefaults() {
    };

    private void initLogin() {
        try {

            RepositoryConnection con = state.getRdfStore().getConnection();

            // initialize the hostname and portnumber
            String query = "select ?u ?p ?s from <" + state.getConfigurationRDFgraph() + "> where {<"
                    + state.getConfigurationRDFgraph()
                    + "> <http://lod2.eu/lod2statworkbench/configures> <http://localhost/ssb>. <http://localhost/ssb> <http://lod2.eu/lod2statworkbench/password> ?p. <http://localhost/ssb> <http://lod2.eu/lod2statworkbench/username> ?u. <http://localhost/ssb> <http://lod2.eu/lod2statworkbench/service> ?s.} LIMIT 100";
            TupleQuery tupleQuery = con.prepareTupleQuery(QueryLanguage.SPARQL, query);
            TupleQueryResult result = tupleQuery.evaluate();
            while (result.hasNext()) {
                BindingSet bindingSet = result.next();

                Value valueOfH = bindingSet.getValue("u");
                if (valueOfH instanceof LiteralImpl) {
                    LiteralImpl literalH = (LiteralImpl) valueOfH;
                    username = literalH.getLabel();
                }
                ;
                Value valueOfP = bindingSet.getValue("p");
                if (valueOfP instanceof LiteralImpl) {
                    LiteralImpl literalP = (LiteralImpl) valueOfP;
                    password = literalP.getLabel();
                }
                ;
                Value valueOfS = bindingSet.getValue("s");
                if (valueOfS instanceof LiteralImpl) {
                    LiteralImpl literalS = (LiteralImpl) valueOfS;
                    String service0 = literalS.getLabel();
                    if (service0 == null | service0.equals("")) {
                        service = "http://localhost/ssb";
                    } else {
                        service = service0;
                    }
                    ;
                }
                ;
            }

        } catch (RepositoryException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (MalformedQueryException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (QueryEvaluationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    };

};