filepersistencehandler.java

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/* 
 * Copyright (c) 2005 FlexDock Development Team. All rights reserved. 
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of 
 * this software and associated documentation files (the "Software"), to deal in the 
 * Software without restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
 * to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all 
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 
 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE.
 */
package org.flexdock.perspective.persist;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.flexdock.docking.state.PersistenceException;
import org.flexdock.perspective.persist.xml.XMLPersister;

/**
 * Created on 2005-06-03
 * 
 * @author <a href="mailto:[e-mail]">Mateusz Szczap</a>
 * @version $Id: FilePersistenceHandler.java,v 1.9 2006/12/20 20:55:22 kschaefe Exp $
 */
public class FilePersistenceHandler implements PersistenceHandler {
	public static final File DEFAULT_PERSPECTIVE_DIR = new File(System.getProperty("user.home") + "/flexdock/perspectives");
	
	protected File defaultPerspectiveFile;
    protected Persister m_persister = null;
    
	public FilePersistenceHandler(String absolutePath) {
		this(new File(absolutePath), null);
	}
	
	public FilePersistenceHandler(File file) {
		this(file, null);
	}
	
	public FilePersistenceHandler(String absolutePath, Persister persister) {
		this(new File(absolutePath), persister);
	}
	
	public FilePersistenceHandler(File defaultFile, Persister persister) {
		defaultPerspectiveFile = defaultFile;
		if(persister==null)
			persister = createDefaultPersister();
		m_persister = persister;
	}
	
	public static FilePersistenceHandler createDefault(String fileName) {
		String path = DEFAULT_PERSPECTIVE_DIR.getAbsolutePath() + "/" + fileName;
		return new FilePersistenceHandler(path);
	}
    
    /**
     * {@inheritDoc}
     */
    public boolean store(String persistenceKey, PerspectiveModel perspectiveModel) throws IOException, PersistenceException {
        File file = getPerspectiveFile(persistenceKey);
        validatePerspectiveFile(file);
        
//        XMLDebugger.println(perspectiveModel);

        FileOutputStream fos = new FileOutputStream(file);
        try {
            return m_persister.store(fos, perspectiveModel);
        } finally {
            fos.close();
        }
    }

    /**
     * {@inheritDoc}
     */
    public PerspectiveModel load(String persistenceKey) throws IOException, PersistenceException {
        File file = getPerspectiveFile(persistenceKey);
        if(file==null || !file.exists())
        	return null;

        FileInputStream fis = new FileInputStream(file);

        try {
            PerspectiveModel perspectiveModel = m_persister.load(fis);
            
//            LayoutNode node = perspectiveModel.getPerspectives()[1].getLayout().getRestorationLayout();
//            XMLDebugger.println(node);
            
            return perspectiveModel;
        } finally {
            fis.close();
        }
    }
    
	protected void validatePerspectiveFile(File file) throws IOException {
		File dir = file.getParentFile();
		if(!dir.exists())
			dir.mkdirs();
		
		if(!file.exists())
			file.createNewFile();
	}
	

	public File getPerspectiveFile(String persistenceKey) {
		if(persistenceKey==null)
			return defaultPerspectiveFile;
		
		String filePath = persistenceKey;
		if(filePath.indexOf('/')==-1 && filePath.indexOf('\\')==-1)
			filePath = DEFAULT_PERSPECTIVE_DIR.getAbsolutePath() + "/" + filePath;
		return new File(filePath);
		
	}
	
	public void setDefaultPerspectiveFile(File file) {
		defaultPerspectiveFile = file;
	}
	
	public void setDefaultPerspectiveFile(String absolutePath) {
		defaultPerspectiveFile = new File(absolutePath);
	}
	
	public Persister createDefaultPersister() {
//		return new DefaultFilePersister();
		return XMLPersister.newDefaultInstance();
	}

}