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.app.project;

import java.text.MessageFormat;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.EventListener;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.gvsig.andami.PluginServices;

import org.gvsig.app.extension.ProjectExtension;

import org.gvsig.app.project.documents.DefaultDocumentActionGroup;

import org.gvsig.app.project.documents.Document;

import org.gvsig.app.project.documents.DocumentAction;

import org.gvsig.app.project.documents.DocumentActionGroup;

import org.gvsig.app.project.documents.DocumentManager;

import org.gvsig.app.project.documents.gui.ProjectWindow;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.extensionpoint.ExtensionPoint;

import org.gvsig.tools.extensionpoint.ExtensionPoint.Extension;

import org.gvsig.tools.extensionpoint.ExtensionPointManager;

import org.gvsig.tools.observer.impl.BaseWeakReferencingObservable;

import org.gvsig.tools.util.BaseListenerSupport;

import org.gvsig.tools.util.BaseListenerSupport.NotificationListener;

public class ProjectManager extends BaseWeakReferencingObservable {

    private static final Logger logger = LoggerFactory

        .getLogger(ProjectManager.class);

    private static ProjectManager factory = null;

    // private static final String KEY_PROJECT = "app.project";

    // private static final String KEY_DOCUMENTS = "app.project.documents";

    private static final String KEY_DOCUMENTS_FACTORIES =

        "app.project.documents.factories";

    private static final String KEY_DOCUMENTS_ACTIONS =

        "app.project.documents.actions";

    private Map<String, DocumentActionGroup> documentActionGroups;

    private final BaseListenerSupport newProjectListeners;

    public interface ProjectEvent extends EventListener {

        public Project getProject();

    }

    public interface NewProjectEvent extends ProjectEvent {

    }

    public static ProjectManager getInstance() {

        if (factory == null) {

            factory = new ProjectManager();

        }

        return factory;

    }

    private ProjectManager() {

        this.documentActionGroups = new HashMap<String, DocumentActionGroup>();

        this.newProjectListeners = new BaseListenerSupport();

    }

    public Project getCurrentProject() {

        ProjectExtension ext = (ProjectExtension) PluginServices.getExtension(ProjectExtension.class);

        if( ext==null ) {

            return null;

        }

        return ext.getProject();

    }

    public void setCurrentProject(Project project) {

        ((ProjectExtension) PluginServices.getExtension(ProjectExtension.class)).setProject(project);

    }

    public ProjectWindow getCurrentProjectWindow() {

        ProjectExtension projectExtension =

            (ProjectExtension) PluginServices

                .getExtension(ProjectExtension.class);

        ProjectWindow window =

            (ProjectWindow) projectExtension.getProjectWindow();

        return window;

    }

    /**

     * @deprecated use {@link #getDocumentManagers()} instead.

     */

    public List<DocumentManager> getDocumentManager() {

        return getDocumentManagers();

    }

    @SuppressWarnings("unchecked")

    public List<DocumentManager> getDocumentManagers() {

        Iterator<Extension> iterator =

            ToolsLocator.getExtensionPointManager()

                .get(KEY_DOCUMENTS_FACTORIES).iterator();

        List<DocumentManager> factories = new ArrayList<DocumentManager>();

        while (iterator.hasNext()) {

            Extension extension = iterator.next();

            try {

                factories.add((DocumentManager) extension.create());

            } catch (InstantiationException e) {

                logger.error("Can't access to project document factory ("

                    + extension.getName() + ").");

            } catch (IllegalAccessException e) {

                logger.error("Can't access to project document factory ("

                    + extension.getName() + ").");

            }

        }

        return factories;

    }

    /**

     * @deprecated use {@link #getDocumentManager(String)} instead.

     */

    public DocumentManager getDocumentManagers(String type) {

        return getDocumentManager(type);

    }

    public DocumentManager getDocumentManager(String type) {

        DocumentManager factory = null;

        try {

            factory =

                (DocumentManager) ToolsLocator.getExtensionPointManager()

                    .get(KEY_DOCUMENTS_FACTORIES).create(type);

        } catch (Exception ex) {

            logger

                .warn(

                    MessageFormat.format(

                        "Unable to locate factory for documents of type {0}",

                        type), ex);

        }

        return factory;

    }

    public Document createDocument(String type) {

        Document doc = getDocumentManager(type).createDocument();

        return doc;

    }

    public Document createDocument(String type, String name) {

        Document doc = createDocument(type);

        doc.setName(name);

        return doc;

    }

    /**

     * @deprecated use {@link #createDocumentsByUser(String)} instead

     */

    public Document createDocumentByUser(String type) {

        Document doc = getDocumentManager(type).createDocumentByUser();

        return doc;

    }

    /**

     * Creates a group of documents of a given type through the user interface.

     * 

     * @param type

     *            the type of documents to create

     * @return the created documents

     */

    public Iterator<? extends Document> createDocumentsByUser(String type) {

        logger.info("createDocumentsByUser('{}')", type);

        return getDocumentManager(type).createDocumentsByUser();

    }

    public Project createProject() {

        return new DefaultProject();

    }

    public ProjectExtent createExtent() {

        return new ProjectExtent();

    }

    public void registerDocumentFactory(DocumentManager documentManager) {

        ExtensionPointManager manager = ToolsLocator.getExtensionPointManager();

        manager.add(KEY_DOCUMENTS_FACTORIES).append(

            documentManager.getTypeName(), null, documentManager);

        notifyObservers();

    }

    public void registerDocumentFactoryAlias(String typeName, String alias) {

        ExtensionPointManager manager = ToolsLocator.getExtensionPointManager();

        manager.get(KEY_DOCUMENTS_FACTORIES).addAlias(typeName, alias);

    }

    public void registerDocumentAction(String typeName, DocumentAction action) {

        ExtensionPointManager manager = ToolsLocator.getExtensionPointManager();

        String key = KEY_DOCUMENTS_ACTIONS + "." + typeName;

        String description =

            MessageFormat.format("Actions for {1} documents ", typeName);

        manager.add(key, description).append(action.getId(),

            action.getDescription(), action);

    }

    /**

     * Gets a list of actions for the document type especified.

     * 

     * La lista esta ordenada deacuerdo al orden especificado en

     * las acciones y grupos de acciones involucrados.

     * 

     * @param doctype

     * @return list of actions as List<DocumentAction>

     */

    @SuppressWarnings("unchecked")

    public List<DocumentAction> getDocumentActions(String doctype) {

        ExtensionPointManager manager = ToolsLocator.getExtensionPointManager();

        String key = KEY_DOCUMENTS_ACTIONS + "." + doctype;

        ExtensionPoint extensionPoint = manager.get(key);

        if (extensionPoint == null) {

            // No hay acciones registradas para ese tipo de documento

            return null;

        }

        List<DocumentAction> actions = new ArrayList<DocumentAction>();

        Iterator<Extension> it = extensionPoint.iterator();

        while (it.hasNext()) {

            try {

                DocumentAction action;

                action = (DocumentAction) it.next().create();

                actions.add(action);

            } catch (InstantiationException e) {

                logger.warn("Can't retrieve document action", e);

            } catch (IllegalAccessException e) {

                logger.warn("Can't retrieve document action", e);

            }

        }

        if (actions.size() < 1) {

            return null;

        }

        Collections.sort(actions, new CompareAction());

        return actions;

    }

    private class CompareAction implements Comparator<DocumentAction> {

        public int compare(DocumentAction action1, DocumentAction action2) {

            // FIXME: flata formatear los enteros!!!!

            String key1 =

                MessageFormat.format("{1}.{2}.{3}", action1.getGroup()

                    .getOrder(), action1.getGroup().getTitle(), action1

                    .getOrder());

            String key2 =

                MessageFormat.format("{1}.{2}.{3}", action2.getGroup()

                    .getOrder(), action2.getGroup().getTitle(), action2

                    .getOrder());

            return key1.compareTo(key2);

        }

    }

    /**

     * Create, add and return a new action for documents.

     * 

     * If action already exists don't create and return this.

     * 

     * @param unique

     *            identifier for the action

     * @param title

     * @param description

     * @param order

     * @return

     */

    public DocumentActionGroup addDocumentActionGroup(String id, String title,

        String description, int order) {

        DocumentActionGroup group = this.documentActionGroups.get(id);

        if (group != null) {

            return group;

        }

        group = new DefaultDocumentActionGroup(id, title, description, order);

        this.documentActionGroups.put(id, group);

        return group;

    }

    public ProjectPreferences getProjectPreferences() {

        return DefaultProject.getPreferences();

    }

    public void addProjectListener(NotificationListener listener) {

        this.newProjectListeners.addListener(listener);

    }

    public NotificationListener[] getProjectListeners() {

        return (NotificationListener[]) this.newProjectListeners.getListeners();

    }

    public boolean hasProjectListeners() {

        return this.newProjectListeners.hasListeners();

    }

    public void removeProjectListener(NotificationListener listener) {

        this.newProjectListeners.removeListener(listener);

    }

    public void removeAllProjectListener() {    

        this.newProjectListeners.removeAllListener();

    }

    public void notifyProjectEvent(ProjectEvent event) {

        this.newProjectListeners.notifyEvent(event);

    }

}