Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 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 3

 * 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.fmap.dal.swing.impl.featuretable.table;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.security.InvalidParameterException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Iterator;

import java.util.List;

import java.util.Locale;

import java.util.Map;

import java.util.Set;

import javax.swing.SwingUtilities;

import javax.swing.Timer;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

import javax.swing.event.TableModelEvent;

import javax.swing.table.AbstractTableModel;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.gvsig.fmap.dal.DataTypes;

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

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

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

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

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

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

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

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

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

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

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

import org.gvsig.fmap.dal.feature.exception.ConcurrentDataModificationException;

import org.gvsig.fmap.dal.feature.paging.FeaturePagingHelper;

import org.gvsig.fmap.dal.swing.impl.featuretable.table.renders.GetFeatureAtException;

import org.gvsig.tools.exception.BaseException;

import org.gvsig.tools.observer.ComplexNotification;

import org.gvsig.tools.observer.ComplexObserver;

import org.gvsig.tools.observer.Observable;

public class DefaultFeatureTableModel extends AbstractTableModel implements org.gvsig.fmap.dal.swing.FeatureTableModel,  ComplexObserver  {

    private static final long serialVersionUID = -8223987814719746492L;

    private static final Logger logger = LoggerFactory.getLogger(DefaultFeatureTableModel.class);

    private List<String> columnNames;

    private List<String> visibleColumnNames;

    private List<String> visibleColumnNamesOriginal;

    private Map<String, String> name2Alias;

    private Map<String, String> name2AliasOriginal;

    private Map<String,String> patterns = null;

    private Locale localeOfData;

    private final FeaturePagingHelper featurePager;

    /** Used to know if a modification in the FeatureStore is created by us. */

    private EditableFeature editableFeature;

    private boolean selectionLocked=false;

    private final DelayAction delayAction = new DelayAction();

    private FeatureSelection selection = null;

    private Set<ActionListener> changeListeners = null;

    public DefaultFeatureTableModel(FeaturePagingHelper featurePager) {

        this.featurePager = featurePager;

        this.localeOfData = Locale.getDefault();

        this.initialize();

    }

    private void initialize() {

        this.getFeatureStore().addObserver(this);

        int columns = this.getOriginalColumnCount();

        // Initilize visible columns

        columnNames = new ArrayList<>(columns);

        visibleColumnNames = new ArrayList<>(columns);

        for (int i = 0; i < columns; i++) {

            FeatureAttributeDescriptor descriptor = this.getInternalColumnDescriptor(i);

            String columnName = descriptor.getName();

            columnNames.add(columnName);

            // By default, geometry columns will not be visible

            if (descriptor.getType() != DataTypes.GEOMETRY) {

                visibleColumnNames.add(columnName);

            }

        }

        visibleColumnNamesOriginal = new ArrayList<>(visibleColumnNames);

        // Initialize alias

        name2Alias = new HashMap<>(columns);

        name2AliasOriginal = new HashMap<>(columns);

        initializeFormatingPatterns();

        updatePagerWithHiddenColums();

    }

    private void initializeFormatingPatterns() {

        int columns = this.getOriginalColumnCount();

        this.patterns = new HashMap<>();

        for (int i = 0; i < columns; i++) {

            FeatureAttributeDescriptor descriptor = this.getInternalColumnDescriptor(i);

            String columnName = descriptor.getName();

            switch(descriptor.getDataType().getType()) {

            case DataTypes.BYTE:

            case DataTypes.INT:

            case DataTypes.LONG:

                String defaultIntegerPattern = "#,##0";

                this.patterns.put(columnName,defaultIntegerPattern);

                break;

            case DataTypes.DOUBLE:

                String defaultDoublePattern = "#,##0.0000000000";

                this.patterns.put(columnName,defaultDoublePattern);

                break;

            case DataTypes.FLOAT:

                String defaultFloatPattern = "#,##0.0000";

                this.patterns.put(columnName,defaultFloatPattern);

                break;

            case DataTypes.DATE:

                String defaultDatePattern = new SimpleDateFormat().toPattern();

                this.patterns.put(columnName,defaultDatePattern);

                break;

            default:

                this.patterns.put(columnName,null);

            }

        }

    }

    private void updatePagerWithHiddenColums() {

            return;

//        FeatureQuery query = this.getFeaturePager().getFeatureQuery();

//        if (this.getFeaturePager().getFeatureStore().isEditing()) {

//            if (query.hasConstantsAttributeNames()) {

//                query.clearConstantsAttributeNames();

//            }

//        } else {

//            query.setConstantsAttributeNames(this.getHiddenColumnNames());

//        }

//        try {

//            this.getFeaturePager().reload();

//        } catch (BaseException ex) {

//            logger.warn("Can't reload paging-helper.", ex);

//        }

    }

    @Override

    public FeaturePagingHelper getFeaturePager() {

        return this.featurePager;

    }

    @Override

    public FeatureQuery getFeatureQuery() {

        return this.getFeaturePager().getFeatureQuery();

    }

    @Override

    public FeatureType getFeatureType() {

        return this.getFeaturePager().getFeatureType();

    }

    @Override

    public FeatureStore getFeatureStore() {

        return this.getFeaturePager().getFeatureStore();

    }

    @Override

    public int getColumnCount() {

        return visibleColumnNames.size();

    }

    public int getOriginalColumnCount() {

        FeatureType featureType = getFeatureType();

        return featureType.size();

    }

    @Override

    public String getColumnName(int column) {

        String columName = getOriginalColumnName(column);

        return this.getColumnAlias(columName);

    }

    @Override

    public Class<?> getColumnClass(int columnIndex) {

        int originalIndex = getOriginalColumnIndex(columnIndex);

        // Return the class of the FeatureAttributeDescriptor for the value

        FeatureAttributeDescriptor attributeDesc = this.getInternalColumnDescriptor(originalIndex);

        if (attributeDesc == null) {

                return super.getColumnClass(originalIndex);

        }

        Class<?> clazz = attributeDesc.getObjectClass();

        return (clazz == null ? super.getColumnClass(originalIndex) : clazz);

    }

    @Override

    public FeatureAttributeDescriptor getColumnDescriptor(int columnIndex) {

        int originalIndex = getOriginalColumnIndex(columnIndex);

        return this.getInternalColumnDescriptor(originalIndex);

    }

    protected FeatureAttributeDescriptor getInternalColumnDescriptor(int columnIndex) {

        FeatureType featureType = getFeatureType();

        if( featureType == null ) {

            return null;

        }

        return featureType.getAttributeDescriptor(columnIndex);

    }

    @Override

    public String getOriginalColumnName(int column) {

        return getInternalColumnDescriptor(column).getName();

    }

    @Override

    public void setColumnVisible(String name, boolean visible) {

        if (!columnNames.contains(name)) {

            throw new InvalidParameterException(name); // FIXME

        }

        if( visible ) {

            if ( !visibleColumnNames.contains(name) ) {

                visibleColumnNames.add(name);

                setVisibleColumns(visibleColumnNames);

            }

        } else {

            if ( visibleColumnNames.contains(name) ) {

                visibleColumnNames.remove(name);

                setVisibleColumns(visibleColumnNames);

                fireTableStructureChanged();

            }

        }

    }

    public void setFeatureType(FeatureType featureType) {

        // Check if there is a new column name

        List<String> newColumns = new ArrayList<>();

        List<String> renamedColumnsNewName = new ArrayList<>();

        Iterator<FeatureAttributeDescriptor> attrIter = featureType.iterator();

        FeatureAttributeDescriptor fad ;

        EditableFeatureAttributeDescriptor efad ;

        String colName;

        while (attrIter.hasNext()) {

            fad = attrIter.next();

            colName = fad.getName();

            if (!columnNames.contains(colName)) {

                if (fad instanceof EditableFeatureAttributeDescriptor) {

                    efad = (EditableFeatureAttributeDescriptor) fad;

                    /*

                     * If editable att descriptor,

                     * check original name

                     */

                    if (efad.getOriginalName() != null) {

                        if (!columnNames.contains(efad.getOriginalName())) {

                            /*

                             * Check with original name but add current name

                             */

                            newColumns.add(colName);

                        } else {

                            /*

                             * List of new names of renamed columns

                             */

                            renamedColumnsNewName.add(colName);

                        }

                    } else {

                        newColumns.add(colName);

                    }

                } else {

                    newColumns.add(colName);

                }

            }

        }

        // Update column names

        columnNames.clear();

        @SuppressWarnings("unchecked")

        Iterator<FeatureAttributeDescriptor> visibleAttrIter =

            featureType.iterator();

        while (visibleAttrIter.hasNext()) {

            fad = visibleAttrIter.next();

            colName = fad.getName();

            columnNames.add(colName);

            //If the column is added has to be visible

            if (!visibleColumnNames.contains(colName)) {

                if (((newColumns.contains(colName)

                    || renamedColumnsNewName.contains(colName)))

                    &&

                    fad.getType() != DataTypes.GEOMETRY) {

                    // Add new columns and renamed

                    visibleColumnNames.add(colName);

                    visibleColumnNamesOriginal.add(colName);

                }

                /*

                if (renamedColumnsNewName.contains(colName)) {

                    // Add renamed

                    insertWhereOldName(visibleColumnNames, colName, fad);

                    insertWhereOldName(visibleColumnNamesOriginal, colName, fad);

                }

                */

            }

        }

        // remove from visible columns removed columns

        visibleColumnNames = intersectKeepOrder(columnNames, visibleColumnNames);

        // instead of: visibleColumnNames.retainAll(columnNames);

        visibleColumnNamesOriginal = intersectKeepOrder(columnNames, visibleColumnNamesOriginal);

        // instead of: visibleColumnNamesOriginal.retainAll(columnNames);

        // remove from alias map removed columns

        name2Alias.keySet().retainAll(columnNames);

        name2AliasOriginal.keySet().retainAll(columnNames);

        initializeFormatingPatterns();

        getFeatureQuery().setFeatureType(featureType);

        reloadFeatures();

        //Selection must be locked to avoid losing it when the table is refreshed

        selectionLocked=true;

        //The table is refreshed

        try {

            fireTableStructureChanged();

        } catch (Exception e) {

            logger.warn("Couldn't reload changed table");

        }finally{

            //The locked selection is unlocked.

            selectionLocked=false;

        }

    }

    private void reloadFeatures() {

        try {

            this.getFeaturePager().reload();

        } catch (BaseException ex) {

            throw new FeaturesDataReloadException(ex);

        }

    }

    /**

     * keeps order of first parameter

     *

     * @param lista

     * @param listb

     * @return

     */

    private List<String> intersectKeepOrder(List<String> lista, List<String> listb) {

        List<String> resp = new ArrayList<>();

        resp.addAll(lista);

        resp.retainAll(listb);

        return resp;

    }

    public void setVisibleColumns(List<String> names) {

        // Recreate the visible column names list

        // to maintain the original order

        visibleColumnNames = new ArrayList<>(names.size());

        for (int i = 0; i < columnNames.size(); i++) {

            String columnName = columnNames.get(i);

            if (names.contains(columnName)) {

                visibleColumnNames.add(columnName);

            }

        }

        updatePagerWithHiddenColums();

        fireTableStructureChanged();

    }

    protected String[] getHiddenColumnNames() {

        List<String> hiddenColumns = new ArrayList<String>();

        hiddenColumns.addAll(columnNames);

        for (int i = 0; i < visibleColumnNames.size(); i++) {

            String columnName = visibleColumnNames.get(i);

            hiddenColumns.remove(columnName);

        }

        if( hiddenColumns.size()<1 ) {

            return null;

        }

        return (String[]) hiddenColumns.toArray(new String[hiddenColumns.size()]);

    }

    /**

     * Changes all columns to be visible.

     */

    public void setAllVisible() {

        visibleColumnNames.clear();

        visibleColumnNames.addAll(columnNames);

        fireTableStructureChanged();

    }

    @Override

    public void setColumnOrder(String name, boolean ascending)

        throws BaseException {

        FeatureQueryOrder order = this.getFeatureQuery().getOrder();

        if (order == null) {

            order = new FeatureQueryOrder();

            this.getFeatureQuery().setOrder(order);

        }

        order.clear();

        order.add(name, ascending);

        this.getFeaturePager().reload();

        fireTableChanged(new TableModelEvent(this, 0, this.getRowCount() - 1));

    }

    @Override

    public int getRowCount() {

        // Return the total size of the collection

        // If the size is bigger than INTEGER.MAX_VALUE, return that instead

        try {

            long totalSize = this.getFeaturePager().getTotalSize();

            if (totalSize > Integer.MAX_VALUE) {

                return Integer.MAX_VALUE;

            } else {

                return (int) totalSize;

            }

        } catch (ConcurrentDataModificationException e) {

            logger.debug("Error while getting the total size of the set", e);

            return 0;

        }

    }

    @Override

    public boolean isColumnVisible(String name) {

        return visibleColumnNames.contains(name);

    }

    @Override

    public String getColumnAlias(String name) {

        String alias = name2Alias.get(name);

        return alias == null ? name : alias;

    }

    @Override

    public void setColumnAlias(String name, String alias) {

        name2Alias.put(name, alias);

        fireTableStructureChanged();

    }

    @Override

    public int getOriginalColumnIndex(int columnIndex) {

        String columnName = visibleColumnNames.get(columnIndex);

        return columnNames.indexOf(columnName);

    }

    @Override

    public Object getValueAt(int rowIndex, int columnIndex) {

        // Get the Feature at row "rowIndex", and return the value of the

        // attribute at "columnIndex"

        Feature feature = getFeatureAt(rowIndex);

        return feature == null ? null : getFeatureValue(feature, columnIndex);

    }

    @Override

    public Feature getFeatureAt(int rowIndex) {

        try {

            return this.getFeaturePager().getFeatureAt(rowIndex);

        } catch (BaseException ex) {

            throw new GetFeatureAtException(rowIndex, ex);

        }

    }

    protected Object getFeatureValue(Feature feature, int columnIndex) {

        int realColumnIndex = getOriginalColumnIndex(columnIndex);

        return feature.get(realColumnIndex);

    }

    protected EditableFeature setFeatureValue(Feature feature, int columnIndex,

        Object value) {

        int realColumnIndex = getOriginalColumnIndex(columnIndex);

        EditableFeature editableFeature = feature.getEditable();

        editableFeature.set(realColumnIndex, value);

        return editableFeature;

    }

    public void acceptChanges() {

            visibleColumnNamesOriginal = new ArrayList<>(visibleColumnNames);

            name2AliasOriginal = new HashMap<>(name2Alias);

    }

    public void cancelChanges() {

            visibleColumnNames = new ArrayList<>(visibleColumnNamesOriginal);

            name2Alias = new HashMap<>(name2AliasOriginal);

            fireTableStructureChanged();

    }

    @Override

    public String getColumnFormattingPattern(int column) {

        String columnName = this.visibleColumnNames.get(column);

        return this.getColumnFormattingPattern(columnName);

    }

    @Override

    public String getColumnFormattingPattern(String columnName) {

        String pattern = this.patterns.get(columnName);

        return pattern;

    }

    @Override

    public void setColumnFormattingPattern(String columnName, String pattern) {

        this.patterns.put(columnName,pattern);

    }

    @Override

    public Locale getLocaleOfData() {

        return this.localeOfData;

    }

    @Override

    public void setLocaleOfData(Locale locale) {

        this.localeOfData = locale;

    }

    public boolean isSelectionLocked() {

        if( !this.getFeatureType().supportReferences() ) {

            return true;

        }

        return selectionLocked;

    }

    @Override

    public boolean isSelectionUp() {

        return this.getFeaturePager().isSelectionUp();

    }

    @Override

    public void setSelectionUp(boolean selectionUp) {

        this.getFeaturePager().setSelectionUp(selectionUp);

        fireTableChanged(new TableModelEvent(this, 0, getRowCount() - 1));

    }

    private class DelayAction extends Timer implements ActionListener, Runnable {

        private static final int STATE_NONE = 0;

        private static final int STATE_NEED_RELOADALL = 1;

        private static final int STATE_NEED_RELOAD_IF_FEATURE_COUNT_CHANGED = 2;

        private static final int STATE_NEED_RELOAD_IF_FEATURE_UPDATED = 4;

        private static final int STATE_NEED_RELOAD_IF_FEATURE_TYPE_CHANGED = 8;

        private static final int STATE_NEED_RELOAD_FEATURE_TYPE = 16;

        private static final int STATE_NEED_SELECTION_UP = 32;

        private static final int STATE_NEED_RELOAD_ALL_FEATURES=64;

        private static final long serialVersionUID = -5692569125344166705L;

        private int state = STATE_NONE;

        private Feature feature;

        private FeatureType featureType;

        private boolean isSelecctionUp;

        public DelayAction() {

            super(1000,null);

            this.setRepeats(false);

            this.reset();

            this.addActionListener(this);

        }

        private void reset() {

            this.state = STATE_NONE;

            this.isSelecctionUp = false;

            this.feature = null;

            this.featureType = null;

        }

        public void actionPerformed(ActionEvent ae) {

            this.run();

        }

        public void run() {

            if( !SwingUtilities.isEventDispatchThread() ) {

                SwingUtilities.invokeLater(this);

                return;

            }

            this.stop();

            logger.info("DelayAction.run["+this.state+"] begin");

            switch(this.state) {

            case STATE_NEED_RELOADALL:

                reloadAll();

                break;

            case STATE_NEED_RELOAD_IF_FEATURE_COUNT_CHANGED:

                reloadIfFeatureCountChanged(feature);

                break;

            case STATE_NEED_RELOAD_IF_FEATURE_UPDATED:

                reloadIfFeatureUpdated(feature);

                break;

            case STATE_NEED_RELOAD_IF_FEATURE_TYPE_CHANGED:

                reloadIfTypeChanged(featureType);

                break;

            case STATE_NEED_RELOAD_FEATURE_TYPE:

                reloadFeatureType();

                updatePagerWithHiddenColums();

                break;

            case STATE_NEED_RELOAD_ALL_FEATURES:

                reloadFeatures();

                fireTableChanged(new TableModelEvent(DefaultFeatureTableModel.this, 0, getRowCount()));

                break;

            case STATE_NEED_SELECTION_UP:

            case STATE_NONE:

            default:

                break;

            }

            if( isSelecctionUp ) {

                getFeaturePager().setSelectionUp(true);

            }

            this.reset();

            logger.info("DelayAction.run["+this.state+"] end");

        }

        public void nextState(int nextstate) {

            this.nextState(nextstate, null, null);

        }

        public void nextState(int nextstate, Feature feature) {

            this.nextState(nextstate, feature, null);

        }

        public void nextState(int nextstate, FeatureType featureType) {

            this.nextState(nextstate, null, featureType);

        }

        public void nextState(int nextstate, Feature feature, FeatureType featureType) {

            this.feature = feature;

            this.featureType = featureType;

            switch(nextstate) {

            case STATE_NEED_RELOADALL:

            case STATE_NEED_RELOAD_IF_FEATURE_COUNT_CHANGED:

            case STATE_NEED_RELOAD_IF_FEATURE_UPDATED:

                switch(this.state) {

                case STATE_NEED_RELOADALL:

                case STATE_NEED_RELOAD_IF_FEATURE_COUNT_CHANGED:

                //case STATE_NEED_RELOAD_IF_FEATURE_UPDATED:

                    this.state = STATE_NEED_RELOADALL;

                    break;

                case STATE_NEED_RELOAD_IF_FEATURE_TYPE_CHANGED:

                case STATE_NEED_RELOAD_FEATURE_TYPE:

                    this.state = STATE_NEED_RELOAD_FEATURE_TYPE;

                    break;

                case STATE_NEED_RELOAD_IF_FEATURE_UPDATED:

                case STATE_NEED_RELOAD_ALL_FEATURES:

                    this.state=STATE_NEED_RELOAD_ALL_FEATURES;

                    break;

                case STATE_NEED_SELECTION_UP:

                    this.state = nextstate;

                    this.isSelecctionUp = true;

                    break;

                case STATE_NONE:

                default:

                    this.state = nextstate;

                    break;

                }

                break;

            case STATE_NEED_RELOAD_IF_FEATURE_TYPE_CHANGED:

            case STATE_NEED_RELOAD_FEATURE_TYPE:

                switch(this.state) {

                case STATE_NEED_RELOADALL:

                case STATE_NEED_RELOAD_IF_FEATURE_COUNT_CHANGED:

                case STATE_NEED_RELOAD_IF_FEATURE_UPDATED:

                case STATE_NEED_RELOAD_ALL_FEATURES:

                case STATE_NEED_RELOAD_IF_FEATURE_TYPE_CHANGED:

                case STATE_NEED_RELOAD_FEATURE_TYPE:

                    this.state = STATE_NEED_RELOAD_FEATURE_TYPE;

                    break;

                case STATE_NEED_SELECTION_UP:

                    this.state = nextstate;

                    this.isSelecctionUp = true;

                    break;

                case STATE_NONE:

                default:

                    this.state = nextstate;

                    break;

                }

                break;

            case STATE_NEED_SELECTION_UP:

                switch(this.state) {

                case STATE_NEED_RELOADALL:

                case STATE_NEED_RELOAD_IF_FEATURE_COUNT_CHANGED:

                case STATE_NEED_RELOAD_IF_FEATURE_UPDATED:

                case STATE_NEED_RELOAD_IF_FEATURE_TYPE_CHANGED:

                case STATE_NEED_RELOAD_ALL_FEATURES:

                case STATE_NEED_RELOAD_FEATURE_TYPE:

                case STATE_NEED_SELECTION_UP:

                    this.isSelecctionUp = true;

                    break;

                case STATE_NONE:

                default:

                    this.state = nextstate;

                    this.isSelecctionUp = true;

                    break;

                }

                break;

            case STATE_NONE:

            default:

                this.state = STATE_NONE;

                break;

            }

            if( this.state != STATE_NONE ) {

                this.start();

            }

        }

    }

    /**

     * Reloads the table data if a feature has been changed, not through the

     * table.

     */

    private void reloadIfFeatureCountChanged(Feature feature) {

        // Is any data is changed in the FeatureStore, notify the model

        // listeners. Ignore the case where the updated feature is

        // changed through us.

        if (editableFeature == null || !editableFeature.equals(feature)) {

            reloadFeatures();

            //Selection must be locked to avoid losing it when the table is refreshed

            selectionLocked=true;

            //The table is refreshed

            try {

                fireTableDataChanged();

            } catch (Exception e) {

                logger.warn("Couldn't reload changed table");

            }finally{

                //The locked selection is unlocked.

                selectionLocked=false;

            }

        }

    }

    private void reloadIfFeatureUpdated(Feature feature) {

        // Is any data is changed in the FeatureStore, notify the model

        // listeners. Ignore the case where the updated feature is

        // changed through us.

        if (editableFeature == null || !editableFeature.equals(feature)) {

            reloadFeatures();

            fireTableChanged(new TableModelEvent(this, 0, getRowCount()));

        }

    }

    /**

     * Reloads data and structure if the {@link FeatureType} of the features

     * being shown has changed.

     */

    private void reloadIfTypeChanged(FeatureType updatedType) {

        // If the updated featured type is the one currently being

        // shown, reload the table.

        if (updatedType != null

            && updatedType.getId().equals(getFeatureType().getId())) {

            setFeatureType(updatedType);

        }

    }

    private void reloadAll() {

            reloadFeatureType();

    }

    private void reloadFeatureType() {

        try {

            FeatureType featureType = this.getFeaturePager().getFeatureType();

            FeatureStore store = this.getFeaturePager().getFeatureStore();

            this.setFeatureType( store.getFeatureType(featureType.getId()) );

        } catch (DataException e) {

            throw new FeaturesDataReloadException(e);

        }

    }

    @Override

    public void update(final Observable observable, final Object notification) {

        if (notification instanceof ComplexNotification) {

            // A lot of things might have happened in the store, so don't

            // bother looking into each notification.

            this.delayAction.nextState(DelayAction.STATE_NEED_RELOADALL);

//            reloadAll();

        } else if (observable.equals(getFeatureStore())

                && notification instanceof FeatureStoreNotification) {

            FeatureStoreNotification fsNotification

                    = (FeatureStoreNotification) notification;

            String type = fsNotification.getType();

            // If there are new, updated or deleted features

            // reload the table data

            if (FeatureStoreNotification.AFTER_DELETE.equals(type)

                    || FeatureStoreNotification.AFTER_INSERT.equals(type)) {

//                reloadIfFeatureCountChanged(fsNotification.getFeature());

                this.delayAction.nextState(DelayAction.STATE_NEED_RELOAD_IF_FEATURE_COUNT_CHANGED, fsNotification.getFeature());

            } else if (FeatureStoreNotification.AFTER_UPDATE.equals(type)) {

//                reloadIfFeatureUpdated(fsNotification.getFeature());

                this.delayAction.nextState(DelayAction.STATE_NEED_RELOAD_IF_FEATURE_UPDATED, fsNotification.getFeature());

            } else if (FeatureStoreNotification.AFTER_UPDATE_TYPE.equals(type)) {

//                reloadIfTypeChanged(fsNotification.getFeatureType());

                this.delayAction.nextState(DelayAction.STATE_NEED_RELOAD_IF_FEATURE_TYPE_CHANGED, fsNotification.getFeatureType());

            } else if (FeatureStoreNotification.TRANSFORM_CHANGE.equals(type)

                    || FeatureStoreNotification.AFTER_UNDO.equals(type)

                    || FeatureStoreNotification.AFTER_REDO.equals(type)

                    || FeatureStoreNotification.AFTER_REFRESH.equals(type))  {

//                reloadAll();

                this.delayAction.nextState(DelayAction.STATE_NEED_RELOADALL);

            } else if (FeatureStoreNotification.AFTER_FINISHEDITING.equals(type)

                    || FeatureStoreNotification.AFTER_STARTEDITING.equals(type)

                    || FeatureStoreNotification.AFTER_CANCELEDITING.equals(type)) {

                /*

                No tengo nada claro por que es necesario llamar al reloadFeatureType

                pero si no se incluye hay problemas si durante la edicion se a?aden

                campos a la tabla. Sin esto, al cerrar la edicion, los campos a?adidos

                desaparecen de la tabla aunque estan en el fichero.

                Ver ticket #2434 https://devel.gvsig.org/redmine/issues/2434

                */

//                reloadFeatureType();

//                updatePaginHelperWithHiddenColums();

                this.delayAction.nextState(DelayAction.STATE_NEED_RELOAD_FEATURE_TYPE, fsNotification.getFeatureType());

            } else if (FeatureStoreNotification.SELECTION_CHANGE.equals(type)) {

                if( this.isSelectionUp() ) {

                    this.setSelectionUp(true);

                    this.delayAction.nextState(DelayAction.STATE_NEED_SELECTION_UP);

                }

            }

        }

    }

    @Override

    public FeatureSelection getFeatureSelection() {

        if (selection == null) {

            try {

                return getFeatureStore().getFeatureSelection();

            } catch (Exception e) {

                logger.warn("Error getting the selection", e);

            }

        }

        return selection;

    }

    @Override

    public void setFeatureSelection(FeatureSelection selection) {

        this.selection = selection;

        this.featurePager.setSelection(selection);

        this.fireChangeListeners(new ActionEvent(this, 0,CHANGE_SELECTION));

    }

    public void addChangeListener(ActionListener listener) {

        if( this.changeListeners==null) {

            this.changeListeners = new HashSet<>();

        }

        this.changeListeners.add(listener);

    }

    public void fireChangeListeners(ActionEvent event) {

        if( this.changeListeners == null ) {

            return;

        }

        for( ActionListener listener : this.changeListeners ) {

            try {

                listener.actionPerformed(event);

            } catch(Exception ex) {

                // Ignore

            }

        }

    }

    @Override

    public int getSelectionCount() {

        try {

            FeatureSelection selection = this.getFeatureSelection();

            return (int) selection.getSize();

        } catch (DataException ex) {

            throw new RuntimeException("Can't get selection of the FeatureTableModel",ex);

        }

    }

}