AbstractDirectoryHolder.java

package com.limegroup.gnutella.gui.library;

import java.io.File;

import javax.swing.Icon;

/**
 * Abstract implementation of the DirectoryHolder interface, providing a filtered
 * way for listing the files in the directory.
 */
public abstract class AbstractDirectoryHolder implements DirectoryHolder {

	/**
	 * Uses the file filter for listing the files in the directory provided by
	 * {@link #getDirectory}.  
	 */
	public File[] getFiles() {
		File[] files = getDirectory().listFiles(this);
		return (files != null) ? files : new File[0];
	}
	
	public boolean accept(File pathname) {
		File parent = pathname.getParentFile();
		return parent != null && parent.equals(getDirectory());
	}
	
	public String getName() {
		return getDirectory().getName();
	}
	
	public String getDescription() {
		return getDirectory().getAbsolutePath();
	}
	
	/**
	 * Returns the number of files that this directory holder contains.
	 */
	public int size() {
		File[] files = getFiles();
		if (files == null)
			return 0;
		return files.length;
	}
	
	public Icon getIcon() {
		return null;
	}
	
	public boolean isEmpty() {
	    return size() == 0;
	}
}