TGLibraryLoader.java

package org.herac.tuxguitar.util;

import java.io.File;
import java.io.FilenameFilter;

public class TGLibraryLoader {
	
	private static TGLibraryLoader instance;
	
	private TGLibraryLoader(){
		super();
	}
	
	public static TGLibraryLoader instance(){
		if(instance == null){
			instance = new TGLibraryLoader();
		}
		return instance;
	}
	
	public void loadLibraries(File folder,final String prefix,final  String extension){
		if(folder != null && folder.exists()){
			FilenameFilter filter = new FilenameFilter() {
				public boolean accept(File dir, String name) {
					if(name == null){
						return false;
					}
					if(prefix != null && prefix.length() > 0){
						int index = name.indexOf(prefix);
						if(index != 0){
							return false;
						}
					}
					if(extension != null && extension.length() > 0){
						int index = name.indexOf(extension);
						if(index != ( name.length() - extension.length() ) ){
							return false;
						}
					}
					return true;
				}
			};
			String[] files = folder.list(filter);
			for(int i = 0; i < files.length; i ++){
				File file = new File(folder.getAbsolutePath() + File.separator + files[i]);
				if(file.exists() && !file.isDirectory()){
					loadLibrary(file);
				}
			}
		}
	}
	
	protected void loadLibrary(File file){
		try{
			LOG.debug("Loading: " + file.getAbsolutePath());
			System.load(file.getAbsolutePath());
		}catch(Throwable throwable){
			throwable.printStackTrace();
		}
	}
	
	 /** The Logger for this class. */
  public static final transient Logger LOG = Logger.getLogger(TGLibraryLoader.class);

}