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// $Id$
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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.model;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.OutputStreamWriter;
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import java.io.UnsupportedEncodingException;
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import org.eclipse.ui.IMemento;
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import org.eclipse.ui.WorkbenchException;
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import org.eclipse.ui.XMLMemento;
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/**
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* <p>MementoHelper class.</p>
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*
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* @author n.hoffmann
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* @created Mar 29, 2010
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* @version 1.0
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*/
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public class MementoHelper {
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/**
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* <p>readMementoFromFile</p>
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*
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* @param stateFile a {@link java.io.File} object.
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* @return a org.eclipse.ui.IMemento object.
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* @throws java.io.FileNotFoundException if any.
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*/
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public static IMemento readMementoFromFile(File stateFile) throws FileNotFoundException{
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FileInputStream input;
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try {
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input = new FileInputStream(stateFile);
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BufferedReader reader = new BufferedReader(
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new InputStreamReader(input, "utf-8")); //$NON-NLS-1$
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return XMLMemento.createReadRoot(reader);
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} catch (WorkbenchException e) {
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MessagingUtils.error(MementoHelper.class, "Exception while reading the memento", e);
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} catch (UnsupportedEncodingException e) {
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MessagingUtils.error(MementoHelper.class, "Exception while reading the memento", e);
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}
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return null;
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}
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/*
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* Save the workbench UI in a persistence file.
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*/
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/**
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* <p>saveMementoToFile</p>
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*
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* @param memento a org.eclipse.ui.IMemento object.
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* @param stateFile a {@link java.io.File} object.
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* @return a org.eclipse.ui.IMemento object.
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*/
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public static IMemento saveMementoToFile(IMemento memento, File stateFile) {
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if (stateFile == null || memento == null) {
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return null;
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}
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try {
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FileOutputStream stream = new FileOutputStream(stateFile);
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OutputStreamWriter writer = new OutputStreamWriter(stream, "utf-8"); //$NON-NLS-1$
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((XMLMemento)memento).save(writer);
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writer.close();
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} catch (IOException e) {
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stateFile.delete();
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MessagingUtils.error(MementoHelper.class, "Could not save datasource state", e);
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return null;
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}
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// Success !
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return memento;
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}
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}
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