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.awt.Color;

import java.awt.image.BufferedImage;

import java.beans.PropertyChangeEvent;

import java.beans.PropertyChangeListener;

import java.beans.PropertyChangeSupport;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.io.Serializable;

import java.text.DateFormat;

import java.text.MessageFormat;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Date;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Set;

import java.util.zip.ZipEntry;

import java.util.zip.ZipException;

import java.util.zip.ZipFile;

import java.util.zip.ZipOutputStream;

import javax.imageio.ImageIO;

import javax.swing.JOptionPane;

import org.apache.commons.io.FileUtils;

import org.apache.commons.io.FilenameUtils;

import org.apache.commons.io.IOUtils;

import org.apache.commons.lang3.StringUtils;

import org.cresques.cts.IProjection;

import org.gvsig.andami.PluginServices;

import org.gvsig.andami.ui.mdiManager.IWindow;

import org.gvsig.andami.ui.mdiManager.MDIManager;

import org.gvsig.andami.ui.mdiManager.SingletonWindow;

import org.gvsig.andami.ui.mdiManager.WindowInfo;

import org.gvsig.app.ApplicationLocator;

import org.gvsig.app.ApplicationManager;

import org.gvsig.app.extension.ProjectExtension;

import org.gvsig.app.extension.Version;

import org.gvsig.app.project.ProjectManager.ProjectEventImpl;

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

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

import org.gvsig.app.project.documents.exceptions.SaveException;

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

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

import org.gvsig.app.project.documents.view.DefaultViewDocument;

import org.gvsig.app.project.documents.view.ViewManager;

import org.gvsig.fmap.mapcontext.MapContext;

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

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

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

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynStruct;

import org.gvsig.tools.i18n.I18nManager;

import org.gvsig.tools.observer.ObservableHelper;

import org.gvsig.tools.observer.Observer;

import org.gvsig.tools.persistence.PersistenceManager;

import org.gvsig.tools.persistence.Persistent;

import org.gvsig.tools.persistence.PersistentContext;

import org.gvsig.tools.persistence.PersistentState;

import org.gvsig.tools.persistence.exception.PersistenceException;

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

import org.gvsig.tools.swing.api.threadsafedialogs.ThreadSafeDialogsManager;

import org.gvsig.utils.StringUtilities;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * Clase que representa un proyecto de gvSIG

 *

 */

public class DefaultProject implements Serializable, PropertyChangeListener,

        Project {

    private Logger LOG = LoggerFactory.getLogger(DefaultProject.class);

    /**

     * @deprecated see ApplicationLocator.getManager().getVersion()

     */

    public static String VERSION = Version.format();

    private ExtendedPropertiesHelper propertiesHelper = new ExtendedPropertiesHelper();

    private ObservableHelper observableHelper = new ObservableHelper();

    /**

     *

     */

    private static final long serialVersionUID = -4449622027521773178L;

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

    private static ProjectPreferences preferences = new ProjectPreferences();

    /**

     * Index used by the generator of unique names of documents.

     */

    private Map<String, Integer> nextDocumentIndexByType = new HashMap<>();

    private PropertyChangeSupport change;

    private boolean modified = false;

    private String name = null;

    private String creationDate = null;

    private String modificationDate = null;

    private String owner = null;

    private String comments = null;

    private Color selectionColor = null;

    private List<Document> documents = null;

    private List<ProjectExtent> extents = null;

    private IProjection projection;

    private File fname = null;

    private Set<String> unloadedObjects;

    private PersistenceException loadErrors = null;

    /**

     * Creates a new Project object.

     */

    DefaultProject() {

        this.change = new PropertyChangeSupport(this);

        this.clean();

        notifyProjectManagerEvent(ProjectNotification.NEW_PROJECT);

    }

    protected void clean() {

        this.owner = "";

        this.comments = "";

        this.name = PluginServices.getText(this, "untitled");

        this.creationDate = DateFormat.getDateInstance().format(new Date());

        this.modificationDate = this.creationDate;

        this.documents = new ArrayList<Document>();

        this.extents = new ArrayList<ProjectExtent>();

        this.setSelectionColor(getPreferences().getDefaultSelectionColor());

        this.projection = null; // se inicializa en el getProjection()

    }

    public static ProjectPreferences getPreferences() {

        return preferences;

    }

    @Override

    public void propertyChange(PropertyChangeEvent evt) {

        change.firePropertyChange(evt);

    }

    @Override

    public synchronized void addPropertyChangeListener(

            PropertyChangeListener arg0) {

        change.addPropertyChangeListener(arg0);

    }

    @Override

    public void removePropertyChangeListener(PropertyChangeListener listener) {

        change.removePropertyChangeListener(listener);

    }

    /**

     * Return the creation date of the project

     *

     * @return

     */

    @Override

    public String getCreationDate() {

        return creationDate;

    }

    protected void setCreationDate(String creationDate) {

        this.creationDate = creationDate;

        change.firePropertyChange("setCreationDate", null, null);

    }

    @Override

    public Document createDocument(String type) {

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

        return ProjectManager.getInstance().createDocument(type);

    }

    /**

     * Return the name of the project

     *

     * @return

     */

    @Override

    public String getName() {

        return name;

    }

    /**

     * Set the name of he project.

     *

     * @param string

     */

    @Override

    public void setName(String name) {

        this.name = name;

        change.firePropertyChange("setName", null, null);

    }

    /**

     * Return the comments associateds with the project

     *

     * @return comments

     */

    @Override

    public String getComments() {

        return comments;

    }

    /**

     * Set the comments associateds with the project

     *

     * @param comments as string

     */

    @Override

    public void setComments(String string) {

        comments = string;

        change.firePropertyChange("setComments", null, null);

    }

    /**

     * Retuen the modification date of the project.

     *

     * @return modification date as string

     */

    @Override

    public String getModificationDate() {

        return modificationDate;

    }

    protected void setModificationDate(String string) {

        modificationDate = string;

        change.firePropertyChange("setModificationDate", null, null);

    }

    /**

     * Return the author of the project,

     *

     * @return author as string

     */

    @Override

    public String getOwner() {

        return owner;

    }

    /**

     * Sets the author of the project

     *

     * @param author name as string

     */

    @Override

    public void setOwner(String owner) {

        this.owner = owner;

        change.firePropertyChange("setOwner", null, null);

    }

    /**

     * Obtiene el color de selecci�n que se usar� en el proyecto

     *

     * @return

     */

    @Override

    public Color getSelectionColor() {

        if (selectionColor == null) {

            selectionColor = getPreferences().getDefaultSelectionColor();

        }

        return selectionColor;

    }

    /**

     * Sets the selecction color

     *

     * @param selection color as string

     */

    @Override

    public void setSelectionColor(String selectionColor) {

        this.setSelectionColor(StringUtilities.string2Color(selectionColor));

    }

    /**

     * Sets the selecction color

     *

     * @param selection color as Color

     */

    @Override

    public void setSelectionColor(Color selectionColor) {

        this.selectionColor = selectionColor;

        MapContext.setSelectionColor(selectionColor);

        change.firePropertyChange("selectionColor", null, selectionColor);

    }

    @Override

    public IProjection getProjection() {

        if (projection == null) {

            projection = getPreferences().getDefaultProjection();

        }

        return projection;

    }

    @Override

    public void setProjection(IProjection projection) {

        this.projection = projection;

    }

    /**

     * Sets the modified state of project.

     *

     * Can't set to not modified.

     *

     * @param modified as boolean

     */

    @Override

    public void setModified(boolean modified) {

        this.modified = modified;

        if (modified == false) {

            List<Document> documents = this.getDocuments();

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

                documents.get(i).setModified(false);

            }

        }

    }

    @Override

    public boolean hasChanged() {

        if( modified ) {

            return true;

        }

        if (this.getDocuments().isEmpty() ) {

            return false;

        }

        for (Document document : this.getDocuments()) {

            if( document.isTemporary()) {

                continue;

            }

            if( document.isModified() ) {

                return true;

            }

        }

        return false;

    }

    /**

     * Return a list of documents in the project.

     *

     * @return documents as List of IProjectDocument

     */

    @Override

    public List<Document> getDocuments() {

        return Collections.unmodifiableList(documents);

    }

    /**

     * Return a list with all documents of especified type.

     *

     * @param type of document

     *

     * @return List of IProjectDocument

     */

    @Override

    public List<Document> getDocuments(String type) {

        List<Document> docs = new ArrayList<Document>();

        if (type != null) {

            for (Document document : this.documents) {

                if (type.equalsIgnoreCase(document.getTypeName())) {

                    docs.add(document);

                }

            }

        }

        Collections.sort(docs, (Document o1, Document o2) -> StringUtils.compareIgnoreCase(o1.getName(), o2.getName()));

        return Collections.unmodifiableList(docs);

    }

    /**

     * Adds a document to the project

     *

     * @param document as Document

     */

    @Override

    public void add(Document document) {

        this.addDocument(document);

    }

    @Override

    public void addDocument(Document document) {

        logger.info("add('{}')", document.toString());

        if (notifyObservers(ProjectNotification.BEFORE_ADD_DOCUMENT, document).isProcessCanceled()) {

            return;

        }

        document.addPropertyChangeListener(this);

        document.setProject(this);

        document.setName(this.getUniqueNameForDocument(document.getTypeName(),

                document.getName()));

        documents.add(document);

        document.afterAdd();

        this.setModified(true);

        notifyObservers(ProjectNotification.AFTER_ADD_DOCUMENT, document);

        change.firePropertyChange("addDocument", null, document);

    }

    @Override

    public void remove(Document doc) {

        this.removeDocument(doc);

    }

    @Override

    public void removeDocument(Document doc) {

        logger.info("remove('{}')", doc.toString());

        if (notifyObservers(ProjectNotification.BEFORE_REMOVE_DOCUMENT, doc).isProcessCanceled()) {

            return;

        }

        documents.remove(doc);

        this.setModified(true);

        change.firePropertyChange("delDocument", doc, null);

        doc.afterRemove();

        notifyObservers(ProjectNotification.AFTER_REMOVE_DOCUMENT, doc);

    }

    @Override

    public Iterator<Document> iterator() {

        return documents.iterator();

    }

    @Override

    public boolean isEmpty() {

        return documents.isEmpty();

    }

    /**

     * Return the view that contains the especified layer.

     *

     * @param layer

     *

     * @return name of the view that contains the layer

     *

     * @throws RuntimeException Si la capa que se pasa como par�metro no se

     * encuentra en ninguna vista

     */

    @Override

    public String getViewName(FLayer layer) {

        List<Document> views = getDocuments(ViewManager.TYPENAME);

        for (int v = 0; v < views.size(); v++) {

            DefaultViewDocument pView = (DefaultViewDocument) views.get(v);

            FLayers layers = pView.getMapContext().getLayers();

            if (isView(layers, layer)) {

                return pView.getName();

            }

        }

        throw new RuntimeException(MessageFormat.format(

                "The layer '{1}' is not in a view", layer.getName()));

    }

    private boolean isView(FLayers layers, FLayer layer) {

        for (int i = 0; i < layers.getLayersCount(); i++) {

            if (layers.getLayer(i) instanceof FLayers) {

                if (isView((FLayers) layers.getLayer(i), layer)) {

                    return true;

                }

            }

            if (layers.getLayer(i) == layer) {

                return true;

            }

        }

        return false;

    }

    @Override

    public void addExtent(ProjectExtent arg1) {

        extents.add(arg1);

        change.firePropertyChange("addExtent", null, null);

    }

    @Override

    public ProjectExtent removeExtent(int arg0) {

        change.firePropertyChange("delExtent", null, null);

        return extents.remove(arg0);

    }

    @Override

    public ProjectExtent[] getExtents() {

        return (ProjectExtent[]) extents.toArray(new ProjectExtent[0]);

    }

    /**

     * Obtiene un documento a partir de su nombre y el nombre de registro en el

     * pointExtension, este �ltimo se puede obtener del

     * Project****Factory.registerName.

     *

     * @param name Nombre del documento

     * @param type nombre de registro en el extensionPoint

     *

     * @return Documento

     */

    @Override

    public Document getDocument(String name, String type) {

        if (type == null) {

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

                Document document = documents.get(i);

                if ( name.equalsIgnoreCase(document.getName())) {

                    return document;

                }

            }

        } else {

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

                Document document = documents.get(i);

                if (type.equalsIgnoreCase(document.getTypeName())

                        && name.equalsIgnoreCase(document.getName())) {

                    return document;

                }

            }

        }

        return null;

    }

    @Override

    public Document getDocument(String name) {

        return this.getDocument(name, null);

    }

    public String getUniqueNameForDocument(String type, String name) {

        Document document = getDocument(name, type);

        if (document == null) {

            return name;

        }

        String newName = null;

        int num = this.getNextDocumentIndex(type);

        while (document != null) {

            newName = name + " - " + num++;

            document = getDocument(newName, type);

        }

        this.setNextDocumentIndex(type, num);

        return newName;

    }

    private int getNextDocumentIndex(String type) {

        if (nextDocumentIndexByType.get(type) == null) {

            nextDocumentIndexByType.put(type, new Integer(1));

            return 1;

        }

        return nextDocumentIndexByType.get(type).intValue();

    }

    private void setNextDocumentIndex(String type, int newIndex) {

        if (nextDocumentIndexByType.get(type) == null) {

            nextDocumentIndexByType.put(type, new Integer(newIndex));

        } else {

            nextDocumentIndexByType.put(type, new Integer(newIndex));

        }

    }

    @Override

    public void saveState(File out) throws PersistenceException {

        FileOutputStream fout;

        if (notifyObservers(ProjectNotification.BEFORE_SAVE_TO_FILE, out).isProcessCanceled()) {

            return;

        }

        try {

            fout = new FileOutputStream(out);

            saveState(fout, new File(out.getParent()));

        } catch (FileNotFoundException e) {

            createProjectCopy(true);

            throw new PersistenceException(e);

        }

        if( !isValidZIP(out) ) {

            throw new PersistenceException(new ZipException());

        }

        this.fname = out;

        //sacar copia al bak

        createProjectCopy(false);

        notifyObservers(ProjectNotification.AFTER_SAVE_TO_FILE, out);

    }

    boolean isValidZIP(final File file) {

        ZipFile zipfile = null;

        try {

            zipfile = new ZipFile(file);

            return true;

        } catch (IOException e) {

            //sacar copia.

            return false;

        } finally {

            try {

                if (zipfile != null) {

                    zipfile.close();

                    zipfile = null;

                }

            } catch (IOException e) {

            }

        }

    }

    @Override

    public File getFile() {

        return this.fname;

    }

    @Deprecated

    @Override

    public void saveState(OutputStream out) throws PersistenceException {

        saveState(out, null);

    }

    @Override

    public void saveState(File file, BufferedImage preview) {

        FileOutputStream fout=null;

        ZipOutputStream zout=null;

        try {

            fout = new FileOutputStream(file);

            zout = new ZipOutputStream(fout);

            this.saveState(zout, file.getParentFile());

            zout.putNextEntry(new ZipEntry("preview.jpg"));

            try {

                ImageIO.write(preview, "jpg", zout);

            } catch (IOException ex) {

                LOG.warn("Can't save preview image'.", ex);

            }

            IOUtils.closeQuietly(zout);

            IOUtils.closeQuietly(fout);

            if( !isValidZIP(file) ) {

                throw new ZipException("Invalid project file '"+file.getAbsolutePath()+"'");

            }

            this.fname = file;

            if (file.exists()) {

                createProjectCopy(false);

            }

            I18nManager i18n = ToolsLocator.getI18nManager();

            ThreadSafeDialogsManager dialog = ToolsSwingLocator.getThreadSafeDialogsManager();

            dialog.message(

                    i18n.getTranslation("wrote_project"),

                    JOptionPane.INFORMATION_MESSAGE

            );

        } catch (Exception ex) {

            createProjectCopy(true);

            throw new RuntimeException("Can't write project in '" + file.getAbsolutePath() + ".", ex);

        } finally {

            IOUtils.closeQuietly(zout);

            IOUtils.closeQuietly(fout);

        }

    }

    @Override

    public void saveState(OutputStream out, File rootFolder)

            throws PersistenceException {

        if (notifyObservers(ProjectNotification.BEFORE_SAVE_TO_STREAM, rootFolder).isProcessCanceled()) {

            return;

        }

        PersistenceManager manager = ToolsLocator.getPersistenceManager();

        PersistentState state = null;

        state = manager.getState(this, true);

        try {

            if (rootFolder != null) {

                state.relativizeFiles(rootFolder);

            }

        } catch (Exception ex) {

            state.getContext().addError(ex);

        }

        manager.saveState(state, out, true);

        if (state.getContext().getErrors() != null) {

            createProjectCopy(true);

            throw state.getContext().getErrors();

        }

        this.fname = null;

        notifyObservers(ProjectNotification.AFTER_SAVE_TO_STREAM, rootFolder);

    }

    private File getNameFileForProject(File actualProjectFile, boolean error) {

        // if there is a error, creates a file with a unique timecode

        // not error: return path with .gvsproj.bak extension that could exists

        if (actualProjectFile==null) {

            LOG.info("Doesn't have previous project to create a bak");

            return null;

        }

        String noExt = FilenameUtils.removeExtension(actualProjectFile.getAbsolutePath());

        String timeCode = new SimpleDateFormat("_MMddHHmmss").format(new Date());

        String ext = ".gvsproj.bak";

        int code = 0;

        if (noExt.length() > 230) {

            noExt = noExt.substring(0, 229);

        }

        File bakProjectFile;

        if (error) {

            bakProjectFile = new File(noExt + timeCode + ext);

            while (bakProjectFile.exists()) {

                code = code + 1;

                bakProjectFile = new File(noExt + timeCode + "_" + code + ext);

            }

        } else {

            bakProjectFile = new File(noExt + ext);

        }

        return bakProjectFile;

    }

    public File createProjectCopy(boolean error) {

        File actualProjectFile = ApplicationLocator.getProjectManager().getCurrentProject().getFile();

        File bakProjectFile = getNameFileForProject(actualProjectFile, error);

        if (bakProjectFile==null){

            return null;

        }

        if (!error){

            try {

                if (bakProjectFile.exists()){

                    FileUtils.deleteQuietly(bakProjectFile);

                }

            } catch (Exception ex) {

                LOG.warn("Not possible to delete file", ex);

            }

            try {

                FileUtils.copyFile(actualProjectFile, bakProjectFile);

            } catch (IOException ex) {

                LOG.warn("Can't create bak copy from project", ex);

            }

        } else {

            File bakProjectFileOld = getNameFileForProject(actualProjectFile, false);

            if (bakProjectFileOld.exists()) {

                try {

                    FileUtils.moveFile(bakProjectFileOld, bakProjectFile);

                } catch (IOException ex) {

                    LOG.warn("Can't rename file", ex);

                }

            } else {

                LOG.info("Can't find bak project. Probably doesn't exist or already has been renamed");

            }

        }

        return bakProjectFile;

    }

    @Deprecated

    @Override

    public void loadState(InputStream in) {

        loadState(in, null);

    }

    public void loadState(InputStream in, File rootFolder) {

        if (notifyObservers(ProjectNotification.BEFORE_LOAD_FROM_STREAM, rootFolder).isProcessCanceled()) {

            return;

        }

        PersistenceManager manager = ToolsLocator.getPersistenceManager();

        try {

            PersistentContext context = manager.getNewContext();

            context.setCollectErrors(true);

            PersistentState state = manager.loadState(in, context);

            try {

                if (rootFolder != null) {

                    state.derelativizeFiles(rootFolder);

                }

            } catch (Exception ex) {

                state.getContext().addError(ex);

            }

            this.loadFromState(state);

            this.unloadedObjects = getUnloadedObjects(state.getContext());

            this.loadErrors = state.getContext().getErrors();

        } catch (PersistenceException e) {

            LOG.info("Can't load project to stream", e);

        }

        this.fname = null;

        notifyObservers(ProjectNotification.AFTER_LOAD_FROM_STREAM, rootFolder);

    }

    /**

     * @param context

     * @return

     */

    private Set<String> getUnloadedObjects(PersistentContext context) {

        Set unloadedObjects = new HashSet();

        Iterator statesIterator = context.iterator();

        String className = null;

        while (statesIterator.hasNext()) {

            PersistentState aState = (PersistentState) statesIterator.next();

            try {

                className = aState.getTheClassName();

                DynStruct definition = aState.getDefinition();

                if (definition == null) {

                    unloadedObjects.add(className);

                }

            } catch (Throwable e) {

                // do nothing

            }

        }

        if(unloadedObjects.isEmpty()){

            return null;

        }

        return unloadedObjects;

    }

    @Override

    public Set<String> getUnloadedObjects() {

        return this.unloadedObjects;

    }

    @Override

    public List<Exception> getLoadErrors() {

        return this.loadErrors;

    }

    @Override

    public void loadState(File in) {

        if (notifyObservers(ProjectNotification.BEFORE_LOAD_FROM_FILE, in).isProcessCanceled()) {

            return;

        }

        FileInputStream fin;

        try {

            fin = new FileInputStream(in);

            loadState(fin, new File(in.getParent()));

        } catch (FileNotFoundException e) {

            LOG.info("Can't load project to stream", e);

        }

        if ("bak".equals(FilenameUtils.getExtension(in.getAbsolutePath()))) {

            this.fname =  null;

        } else {

            this.fname = in;

        }

        notifyObservers(ProjectNotification.AFTER_LOAD_FROM_FILE, in);

    }

    //@SuppressWarnings("unchecked")

    @Override

    public void loadFromState(PersistentState state)

            throws PersistenceException {

        this.clean();

        PersistentContext context = state.getContext();

        notifyObservers(ProjectNotification.BEFORE_LOAD_FROM_STATE, state);

        this.setComments(state.getString("comments"));

        this.setCreationDate(state.getString("creationDate"));

        this.setModificationDate(state.getString("modificationDate"));

        this.setName(state.getString("name"));

        this.setOwner(state.getString("owner"));

        this.setSelectionColor((Color) state.get("selectionColor"));

        this.setProjection((IProjection) state.get("projection"));

        this.propertiesHelper = (ExtendedPropertiesHelper) state.get("propertiesHelper");

        List<ProjectExtent> extents = (List<ProjectExtent>) state

                .get("extents");

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

            this.addExtent(extents.get(i));

        }

        List<AbstractDocument> documents = (List<AbstractDocument>) state

                .get("documents");

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

            AbstractDocument doc = documents.get(i);

            if( doc != null ) {

                this.add(doc);

            }

        }

        try {

            List<DocumentWindowInfo> persistentWindows = (List<DocumentWindowInfo>) state.get("documentWindowsInformation");