/*
* Copyright (c) 2009-2012 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jme3.asset.plugins;
import com.jme3.asset.AssetInfo;
import com.jme3.asset.AssetKey;
import com.jme3.asset.AssetLoadException;
import com.jme3.asset.AssetManager;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
/**
* Handles loading of assets from a URL
*
* @author Kirill Vainer
*/
public class UrlAssetInfo extends AssetInfo {
private URL url;
private InputStream in;
public static UrlAssetInfo create(AssetManager assetManager, AssetKey key, URL url) throws IOException {
// Check if URL can be reached. This will throw
// IOException which calling code will handle.
URLConnection conn = url.openConnection();
conn.setUseCaches(false);
InputStream in = conn.getInputStream();
// For some reason url cannot be reached?
if (in == null){
return null;
}else{
return new UrlAssetInfo(assetManager, key, url, in);
}
}
private UrlAssetInfo(AssetManager assetManager, AssetKey key, URL url, InputStream in) throws IOException {
super(assetManager, key);
this.url = url;
this.in = in;
}
public boolean hasInitialConnection(){
return in != null;
}
@Override
public InputStream openStream() {
if (in != null){
// Reuse the already existing stream (only once)
InputStream in2 = in;
in = null;
return in2;
}else{
// Create a new stream for subsequent invocations.
try {
URLConnection conn = url.openConnection();
conn.setUseCaches(false);
return conn.getInputStream();
} catch (IOException ex) {
throw new AssetLoadException("Failed to read URL " + url, ex);
}
}
}
}