/*******************************************************************************
* Copyright (c) 2005, 2007 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.internal.wizards.preferences;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.preferences.IExportedPreferences;
import org.eclipse.core.runtime.preferences.IPreferenceFilter;
import org.eclipse.core.runtime.preferences.IPreferencesService;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.ui.internal.WorkbenchPlugin;
import org.eclipse.ui.internal.preferences.PreferenceTransferElement;
/**
* Page 1 of the base preference import Wizard
*
*
* @since 3.1
*/
public class WizardPreferencesImportPage1 extends WizardPreferencesPage {
/**
* Create a new instance of the receiver with name pageName.
* @param pageName
*/
protected WizardPreferencesImportPage1(String pageName) {
super(pageName);
setTitle(PreferencesMessages.WizardPreferencesImportPage1_importTitle);
setDescription(PreferencesMessages.WizardPreferencesImportPage1_importDescription);
}
/**
* Create an instance of this class
*/
public WizardPreferencesImportPage1() {
this("preferencesImportPage1");//$NON-NLS-1$
}
/* (non-Javadoc)
* @see org.eclipse.ui.internal.wizards.preferences.WizardPreferencesPage#getAllButtonText()
*/
protected String getAllButtonText() {
return PreferencesMessages.WizardPreferencesImportPage1_all;
}
/* (non-Javadoc)
* @see org.eclipse.ui.internal.wizards.preferences.WizardPreferencesPage#getChooseButtonText()
*/
protected String getChooseButtonText() {
return PreferencesMessages.WizardPreferencesImportPage1_choose;
}
/* (non-Javadoc)
* @see org.eclipse.ui.internal.wizards.preferences.WizardPreferencesPage#getTransfers()
*/
protected PreferenceTransferElement[] getTransfers() {
if (validFromFile()) {
FileInputStream fis;
try {
fis = new FileInputStream(getDestinationValue());
} catch (FileNotFoundException e) {
WorkbenchPlugin.log(e.getMessage(), e);
return new PreferenceTransferElement[0];
}
IPreferencesService service = Platform.getPreferencesService();
try {
IExportedPreferences prefs;
prefs = service.readPreferences(fis);
PreferenceTransferElement[] transfers = super.getTransfers();
IPreferenceFilter[] filters = new IPreferenceFilter[transfers.length];
for (int i = 0; i < transfers.length; i++) {
PreferenceTransferElement transfer = transfers[i];
filters[i] = transfer.getFilter();
}
IPreferenceFilter[] matches = service.matches(prefs, filters);
PreferenceTransferElement[] returnTransfers = new PreferenceTransferElement[matches.length];
int index = 0;
for (int i = 0; i < matches.length; i++) {
IPreferenceFilter filter = matches[i];
for (int j = 0; j < transfers.length; j++) {
PreferenceTransferElement element = transfers[j];
if (element.getFilter().equals(filter)) {
returnTransfers[index++] = element;
}
}
}
PreferenceTransferElement[] destTransfers = new PreferenceTransferElement[index];
System.arraycopy(returnTransfers, 0, destTransfers, 0, index);
return destTransfers;
} catch (CoreException e) {
//Do not log core exceptions, they indicate the chosen file is not valid
//WorkbenchPlugin.log(e.getMessage(), e);
} finally {
try {
fis.close();
} catch (IOException e) {
WorkbenchPlugin.log(e.getMessage(), e);
}
}
}
return new PreferenceTransferElement[0];
}
/**
* Return whether or not the file is valid.
* @return <code>true</code> of the file is an existing
* file and not a directory
*/
private boolean validFromFile() {
File fromFile = new File(getDestinationValue());
return fromFile.exists() && !fromFile.isDirectory();
}
protected void setPreferenceTransfers() {
super.setPreferenceTransfers();
if(validFromFile() && (transfersTable.getItemCount() == 0)) {
text.setText(PreferencesMessages.WizardPreferences_noSpecificPreferenceDescription);
} else {
text.setText(""); //$NON-NLS-1$
}
}
/* (non-Javadoc)
* @see org.eclipse.ui.internal.wizards.preferences.WizardPreferencesPage#createTransferArea(org.eclipse.swt.widgets.Composite)
*/
protected void createTransferArea(Composite composite) {
createDestinationGroup(composite);
createTransfersList(composite);
}
/**
* Answer the string to display in self as the destination type
*
* @return java.lang.String
*/
protected String getDestinationLabel() {
return PreferencesMessages.WizardPreferencesImportPage1_file;
}
/**
* @param filters
* @return <code>true</code> if the transfer was succesful, and
* <code>false</code> otherwise
*/
protected boolean transfer(IPreferenceFilter[] filters) {
File importFile = new File(getDestinationValue());
FileInputStream fis = null;
try {
if (filters.length > 0) {
try {
fis = new FileInputStream(importFile);
} catch (FileNotFoundException e) {
WorkbenchPlugin.log(e.getMessage(), e);
MessageDialog.openError(getControl().getShell(), new String(), e.getLocalizedMessage());
return false;
}
IPreferencesService service = Platform.getPreferencesService();
try {
IExportedPreferences prefs = service.readPreferences(fis);
service.applyPreferences(prefs, filters);
} catch (CoreException e) {
WorkbenchPlugin.log(e.getMessage(), e);
MessageDialog.openError(getControl().getShell(), new String(), e.getLocalizedMessage());
return false;
}
}
} finally {
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
WorkbenchPlugin.log(e.getMessage(), e);
MessageDialog.openError(getControl().getShell(), new String(), e.getLocalizedMessage());
}
}
}
return true;
}
/**
* Handle events and enablements for widgets in this page
*
* @param e
* Event
*/
public void handleEvent(Event e) {
if (e.widget == destinationNameField) {
setPreferenceTransfers();
}
super.handleEvent(e);
}
/* (non-Javadoc)
* @see org.eclipse.ui.internal.wizards.preferences.WizardPreferencesPage#getFileDialogTitle()
*/
protected String getFileDialogTitle(){
return PreferencesMessages.WizardPreferencesImportPage1_title;
}
/* (non-Javadoc)
* @see org.eclipse.ui.internal.wizards.preferences.WizardPreferencesPage#getFileDialogStyle()
*/
protected int getFileDialogStyle() {
return SWT.OPEN;
}
/* (non-Javadoc)
* @see org.eclipse.ui.internal.wizards.preferences.WizardPreferencesPage#validDestination()
*/
protected boolean validDestination() {
return super.validDestination() && validFromFile();
}
/* (non-Javadoc)
* @see org.eclipse.ui.internal.wizards.preferences.WizardPreferencesPage#getInvalidDestinationMessage()
*/
protected String getInvalidDestinationMessage() {
return PreferencesMessages.WizardPreferencesImportPage1_invalidPrefFile;
}
}