/**
* Copyright (C) 2002-2012 The FreeCol Team
*
* This file is part of FreeCol.
*
* FreeCol 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.
*
* FreeCol 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 FreeCol. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sf.freecol.common.resources;
import java.lang.ref.WeakReference;
import java.net.URI;
import java.util.Map;
import java.util.WeakHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import android.util.Log;
/**
* A factory class for creating <code>Resource</code> instances.
* @see Resource
*/
public class ResourceFactory {
private static final Logger logger = Logger.getLogger(ResourceFactory.class.getName());
/**
* A <code>WeakHashMap</code> to ensure that only one
* <code>Resource</code> is created given the same
* <code>URI</code>.
*/
private static Map<URI, WeakReference<Resource>> resources = new WeakHashMap<URI, WeakReference<Resource>>();
/**
* Gets the resource with the given <code>URI</code> from
* {@link #resources}.
*
* @param uri The <code>URI</code> to identify a previously created
* <code>Resource</code>.
* @return The <code>Resource</code> identified by the given
* <code>URI</code>, or <code>null</code> if no such
* <code>Resource</code> exists.
*/
private static Resource getResource(URI uri) {
final WeakReference<Resource> wr = resources.get(uri);
if (wr != null) {
final Resource r = wr.get();
if (r != null) {
return r;
}
}
return null;
}
/**
* Returns an instance of <code>Resource</code> with the
* given <code>URI</code> as the parameter.
*
* @param uri The <code>URI</code> used when creating the
* instance.
* @return A previously created instance of <code>Resource</code>
* with the given <code>URI</code> if such an object has
* already been created, or a new instance if not.
*/
public static Resource createResource(URI uri) {
// System.out.println("ResourceFactory.createResource(), uri=" + uri.toString());
Resource r = getResource(uri);
if (r == null) {
try {
if ("urn".equals(uri.getScheme())) {
System.out.println("Resource scheme=" + uri.getScheme() + ", spec=" + uri.getSchemeSpecificPart());
if (uri.getSchemeSpecificPart().startsWith(ColorResource.SCHEME)) {
r = new ColorResource(uri);
} else if (uri.getSchemeSpecificPart().startsWith(ChipResource.SCHEME)) {
r = new ChipResource(uri);
} else if (uri.getSchemeSpecificPart().startsWith(FontResource.SCHEME)) {
r = new FontResource(uri);
}
} else if (uri.getPath().endsWith(".faf")) {
r = new FAFileResource(uri);
} else if (uri.getPath().endsWith(".sza")) {
r = new SZAResource(uri);
} else if (uri.getPath().endsWith(".ttf")) {
r = new FontResource(uri);
} else if (uri.getPath().endsWith(".ogg")) {
if (uri.getPath().endsWith(".video.ogg")) {
r = new VideoResource(uri);
} else {
r = new AudioResource(uri);
}
} else {
r = new ImageResource(uri);
}
resources.put(uri, new WeakReference<Resource>(r));
} catch (Exception e) {
// Log.w("ResourceFactory", "Failed to create resource with URI: " + uri, e);
logger.log(Level.WARNING, "Failed to create resource with URI: " + uri, e);
}
}
return r;
}
}