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 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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,
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package org.apache.cayenne.modeler.action;

import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.io.File;
import java.net.URL;
import java.util.prefs.Preferences;

import javax.swing.JOptionPane;
import javax.swing.KeyStroke;

import org.apache.cayenne.CayenneRuntimeException;
import org.apache.cayenne.configuration.ConfigurationNode;
import org.apache.cayenne.modeler.Application;
import org.apache.cayenne.modeler.dialog.validator.ValidationDisplayHandler;
import org.apache.cayenne.modeler.dialog.validator.ValidatorDialog;
import org.apache.cayenne.modeler.util.CayenneAction;
import org.apache.cayenne.pref.RenamedPreferences;
import org.apache.cayenne.project.Project;
import org.apache.cayenne.project.ProjectSaver;
import org.apache.cayenne.project.validation.ProjectValidator;
import org.apache.cayenne.resource.URLResource;
import org.apache.cayenne.validation.ValidationResult;

/**
 * A "Save As" action that allows user to pick save location.
 * 
 */
public class SaveAsAction extends CayenneAction {

    protected ProjectOpener fileChooser;

    public static String getActionName() {
        return "Save As...";
    }

    public SaveAsAction(Application application) {
        this(getActionName(), application);
    }

    protected SaveAsAction(String name, Application application) {
        super(name, application);
        this.fileChooser = new ProjectOpener();
    }

    public KeyStroke getAcceleratorKey() {
        return KeyStroke.getKeyStroke(KeyEvent.VK_S, Toolkit
                .getDefaultToolkit()
                .getMenuShortcutKeyMask()
                | ActionEvent.SHIFT_MASK);
    }

    /**
     * Saves project and related files. Saving is done to temporary files, and only on
     * successful save, master files are replaced with new versions.
     */
    protected boolean saveAll() throws Exception {
        Project p = getCurrentProject();

        String oldPath = null;
        if (p.getConfigurationResource() != null) {
            oldPath = p.getConfigurationResource().getURL().getPath();
        }

        File projectDir = fileChooser.newProjectDir(Application.getFrame(), p);
        if (projectDir == null) {
            return false;
        }

        if (projectDir.exists() && !projectDir.canWrite()) {
            JOptionPane.showMessageDialog(
                    Application.getFrame(),
                    "Can't save project - unable to write to file \""
                            + projectDir.getPath()
                            + "\"",
                    "Can't Save Project",
                    JOptionPane.OK_OPTION);
            return false;
        }

        getProjectController().getProjectWatcher().pauseWatching();

        URL url = projectDir.toURL();

        URLResource res = new URLResource(url);

        ProjectSaver saver = getApplication().getInjector().getInstance(
                ProjectSaver.class);

        boolean isNewProject = p.getConfigurationResource() == null;
        Preferences tempOldPref = null;
        if (isNewProject) {
            tempOldPref = getApplication().getMainPreferenceForProject();
        }

        saver.saveAs(p, res);

        if (oldPath != null
                && oldPath.length() != 0
                && !oldPath.equals(p.getConfigurationResource().getURL().getPath())) {

            String newName = p.getConfigurationResource().getURL().getPath().replace(
                    ".xml",
                    "");
            String oldName = oldPath.replace(".xml", "");

            Preferences oldPref = getProjectController().getPreferenceForProject();
            String projPath = oldPref.absolutePath().replace(oldName, "");
            Preferences newPref = getProjectController().getPreferenceForProject().node(
                    projPath + newName);
            RenamedPreferences.copyPreferences(newPref, getProjectController()
                    .getPreferenceForProject(), false);
        }
        else if (isNewProject) {
            if (tempOldPref != null) {

                String newProjectName = getApplication().getNewProjectTemporaryName();

                if (tempOldPref.absolutePath().contains(newProjectName)) {

                    String projPath = tempOldPref.absolutePath().replace(
                            "/" + newProjectName,
                            "");
                    String newName = p
                            .getConfigurationResource()
                            .getURL()
                            .getPath()
                            .replace(".xml", "");

                    Preferences newPref = getApplication()
                            .getMainPreferenceForProject()
                            .node(projPath + newName);

                    RenamedPreferences.copyPreferences(newPref, tempOldPref, false);
                    tempOldPref.removeNode();
                }
            }
        }

        RenamedPreferences.removeNewPreferences();

        getApplication().getFrameController().addToLastProjListAction(
                p.getConfigurationResource().getURL().getPath());

        Application.getFrame().fireRecentFileListChanged();

        /**
         * Reset the watcher now
         */
        getProjectController().getProjectWatcher().reconfigure();

        return true;
    }

    /**
     * This method is synchronized to prevent problems on double-clicking "save".
     */
    public synchronized void performAction(ActionEvent e) {
        performAction(ValidationDisplayHandler.WARNING);
    }

    public synchronized void performAction(int warningLevel) {

        ProjectValidator projectValidator = getApplication().getInjector().getInstance(
                ProjectValidator.class);
        ValidationResult validationResult = projectValidator.validate(getCurrentProject()
                .getRootNode());

        try {
            if (!saveAll()) {
                return;
            }
        }
        catch (Exception ex) {
            throw new CayenneRuntimeException("Error on save", ex);
        }

        getApplication().getFrameController().projectSavedAction();

        // If there were errors or warnings at validation, display them
        if (validationResult.getFailures().size() > 0) {
            ValidatorDialog.showDialog(Application.getFrame(), validationResult
                    .getFailures());
        }
    }

    /**
     * Returns true if path contains a Project object and the project is
     * modified.
     */
    public boolean enableForPath(ConfigurationNode object) {
        if (object == null) {
            return false;
        }

        Project project = getApplication().getProject();
        return project != null && project.isModified();
    }
}




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