DialogFileFilter.java

/*
Copyright 2008-2010 Gephi
Authors : Mathieu Bastian <mathieu.bastian@gephi.org>
Website : http://www.gephi.org

This file is part of Gephi.

Gephi is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

Gephi 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 Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with Gephi.  If not, see <http://www.gnu.org/licenses/>.
*/

package org.gephi.ui.utils;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;

/**
 * File filters for the open and save system dialog.
 *
 * @author Mathieu Bastian
 */
public class DialogFileFilter extends javax.swing.filechooser.FileFilter
{

	private String description;
	private List<String> extensions;

	public DialogFileFilter(String description)
	{
		if(description == null)
		{
			Logger.getLogger(DialogFileFilter.class.getName()).throwing(getClass().getName(), "constructor", new NullPointerException("Description cannot be null."));
		}
		this.description = description;
		this.extensions = new ArrayList<String>();
	}

	@Override
	public boolean accept(File file)
	{
		if(file.isDirectory() || extensions.size()==0) {
			return true;
		}
		String fileName = file.getName().toLowerCase();
		for(String extension : extensions){
			if(fileName.endsWith(extension)){
				return true;
			}
		}
		return false;
	}
	@Override
	public String getDescription(){
		StringBuffer buffer = new StringBuffer(description);
		buffer.append(" (");
		for(String extension : extensions){
			buffer.append("*"+extension).append(" ");
		}
		buffer.deleteCharAt(buffer.length()-1);
		return buffer.append(")").toString();
	}


	public void setDescription(String description){
		if(description == null)
		{
            Logger.getLogger(DialogFileFilter.class.getName()).throwing(getClass().getName(), "setDescription", new NullPointerException("Description cannot be null."));
		}
		this.description = description;
	}


	public void addExtension(String extension){
		if(extension == null)
		{
            Logger.getLogger(DialogFileFilter.class.getName()).throwing(getClass().getName(), "addExtension", new NullPointerException("Description cannot be null."));
		}
		extensions.add(extension);
	}

    public void addExtensions(String[] extension){
		if(extension == null)
		{
            Logger.getLogger(DialogFileFilter.class.getName()).throwing(getClass().getName(), "addExtensions", new NullPointerException("Description cannot be null."));
		}
		for(int i=0;i<extension.length;i++)
        {
            extensions.add(extension[i]);
        }
	}

	public void removeExtension(String extension)
	{
		extensions.remove(extension);
	}


	public void clearExtensions(){
		extensions.clear();
	}


	public List<String> getExtensions(){
		return extensions;
	}

    @Override
    public boolean equals(Object obj) {
         if (!(obj instanceof DialogFileFilter)) {
            return false;
        }
        DialogFileFilter s = (DialogFileFilter) obj;
        if (s.extensions.size() != this.extensions.size()) {
            return false;
        }
        for (int i = 0; i < extensions.size(); i++) {
            if (this.extensions.get(i) != s.extensions.get(i)) {
                if (!this.extensions.get(i).equals(s.extensions.get(i))) {
                    return false;
                }
            }
        }
        if(!description.equals(s.description)) {
            return false;
        }

        return true;
    }

    //TODO define hashCode
}