Application: gvSIG desktop

import java.util.Arrays;

import java.util.Map;

import javax.swing.JComponent;

import javax.swing.SwingUtilities;

import org.apache.commons.codec.binary.Hex;

import org.gvsig.andami.PluginServices;

import org.gvsig.andami.PluginsLocator;

import org.gvsig.andami.PluginsManager;

import org.gvsig.fmap.dal.DataStore;

import org.gvsig.fmap.dal.DataStoreParameters;

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

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

import org.gvsig.fmap.dal.store.jdbc.JDBCServerExplorer;

import org.gvsig.fmap.dal.store.jdbc.JDBCStoreParameters;

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

import org.gvsig.geodb.vectorialdb.visibility.VisibilityScaleSelector;

import org.gvsig.geodb.vectorialdb.visibility.LayerScaleVisibility;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynObject;

import org.gvsig.tools.i18n.I18nManager;

import org.gvsig.tools.swing.api.ToolsSwingLocator;

import org.gvsig.tools.swing.api.windowmanager.WindowManager;

    public static final int NUMBER_OF_FEATURES_TO_ASK_FOR_VISIBILITY_SCALE = 500;

    public static final String LAYERS_SCALE_VISIBILITY_PARAMETER="layersScaleVisibility";

                    checkForVisibilityScale(layer);

        private void checkForVisibilityScale(FLayer layer) throws DataException, ValidateDataParametersException {

        PluginsManager pluginManager = PluginsLocator.getPluginsManager();

        PluginServices plugin = pluginManager.getPlugin(ExtDB_Spatial.class);

        DynObject pluginProperties = plugin.getPluginProperties();

        Map<String, LayerScaleVisibility> layersScaleVisibility = (Map) pluginProperties.getDynValue(LAYERS_SCALE_VISIBILITY_PARAMETER);

        String layerKey = buildLayerKey(layer);

        if(layerKey != null) {

            LayerScaleVisibility layerScaleVisibility = layersScaleVisibility.get(layerKey);

            if(layerScaleVisibility!=null){

                int scaleAboveDenominator = layerScaleVisibility.getScaleAboveDenominator();

                int scaleBelowDenominator = layerScaleVisibility.getScaleBelowDenominator();

                layer.setMaxScale(scaleAboveDenominator);

                layer.setMinScale(scaleBelowDenominator);

                return;

            }

        }

        if (layer instanceof FLyrVect) {

            FLyrVect lyrVect = (FLyrVect)layer;

            FeatureStore store = lyrVect.getFeatureStore();

            if((store.getExplorer() instanceof JDBCServerExplorer)

                    && (store.getFeatures().size()>NUMBER_OF_FEATURES_TO_ASK_FOR_VISIBILITY_SCALE) ){

                askUserForVisibilityScale(layer);

            }

        }

    }

    private void askUserForVisibilityScale(FLayer layer) {

        if (!SwingUtilities.isEventDispatchThread()) {

            SwingUtilities.invokeLater(new Runnable() {

                @Override

                public void run() {

                    askUserForVisibilityScale(layer);

                }

            });

            return;

        }

        VisibilityScaleSelector visibilityScaleSelector = new VisibilityScaleSelector();

        I18nManager i18nManager = ToolsLocator.getI18nManager();

        WindowManager winManager = ToolsSwingLocator.getWindowManager();

        winManager.showWindow(

                (JComponent) visibilityScaleSelector, 

                i18nManager.getTranslation("select_visibility_scale"), 

                WindowManager.MODE.DIALOG

        );

        if (visibilityScaleSelector.isOkPressed()) {

            layer.setMaxScale(visibilityScaleSelector.getScaleAboveDenominator());

            layer.setMinScale(visibilityScaleSelector.getScaleBelowDenominator());

            if(visibilityScaleSelector.getRememberAnswer()){

                PluginsManager pluginManager = PluginsLocator.getPluginsManager();

                PluginServices plugin = pluginManager.getPlugin(ExtDB_Spatial.class);

                DynObject pluginProperties = plugin.getPluginProperties();

                String layerKey = buildLayerKey(layer);

                String layerLabel = buildLayerLabel(layer);

                if(layerKey != null && layerLabel != null){

                    Map<String, LayerScaleVisibility> layersScaleVisibility = (Map) pluginProperties.getDynValue(LAYERS_SCALE_VISIBILITY_PARAMETER);

                    LayerScaleVisibility layerScaleVisibility = new LayerScaleVisibility();

                    layerScaleVisibility.setScaleAboveDenominator(visibilityScaleSelector.getScaleAboveDenominator());

                    layerScaleVisibility.setScaleBelowDenominator(visibilityScaleSelector.getScaleBelowDenominator());

                    layerScaleVisibility.setLabel(layerLabel);

                    layersScaleVisibility.put(layerKey, layerScaleVisibility);

                }

            }

        }

    }

    private String buildLayerKey(FLayer layer) {

        if(layer!=null){

            DataStore dataStore = ((FLyrVect)layer).getDataStore();

            if(dataStore != null){

                DataStoreParameters parameters = dataStore.getParameters();

                if(parameters != null){

                    return Arrays.toString(Hex.encodeHex(parameters.toByteArray()));

                }

            }

        }

        return null;

    }

    private String buildLayerLabel(FLayer layer) {

        if(layer!=null){

            DataStore dataStore = ((FLyrVect)layer).getDataStore();

            if(dataStore != null){

                    StringBuilder builder = new StringBuilder();

                    DataStoreParameters parameters = dataStore.getParameters();

                    if(parameters != null && parameters instanceof DBStoreParameters){

                        JDBCStoreParameters jdbcParameters = (JDBCStoreParameters)parameters;

                        builder.append(jdbcParameters.getDBName());

                        builder.append(".");

                        builder.append(jdbcParameters.getSchema());

                        builder.append(".");

                        builder.append(jdbcParameters.getTable());

                        return builder.toString();

                }

            }

        }

        return null;

    }