AssetManager.java

/*
 * Copyright (c) 2004-2009 XMLVM --- An XML-based Programming Language
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 * 
 * This program 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 General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 675 Mass
 * Ave, Cambridge, MA 02139, USA.
 * 
 * For more information, visit the XMLVM Home Page at http://www.xmlvm.org
 */

package android.content.res;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;

import org.xmlvm.iphone.NSBundle;


public/* abstract */class AssetManager {

    private static final String ASSETS_DIR = "assets/";
    
    public final AssetFileDescriptor openFd(String fileName) throws IOException {
        String resourceName = getResourceName(fileName);
        String resourceDir = getResourceDirectory(fileName);
        String filePath = NSBundle.mainBundle().pathForResource(resourceName, null, resourceDir);
        File f = new File(filePath);
        if (!f.exists()) {
            throw new FileNotFoundException();
        }
        return new AssetFileDescriptor(f);
    }
    
    private String getResourceName(String filePath) {
        int i = filePath.lastIndexOf('/');
        return i >= 0 ? filePath.substring(i + 1) : filePath;
    }

    private String getResourceDirectory(String filePath) {
        String fileName = ASSETS_DIR + filePath;
        int i = fileName.lastIndexOf('/');
        return i >= 0 ? fileName.substring(0, i) : null;
    }


}