1 package com.jme3.asset.plugins; 2 3 import com.jme3.asset.AssetInfo; 4 import com.jme3.asset.AssetKey; 5 import com.jme3.asset.AssetLoadException; 6 import com.jme3.asset.AssetManager; 7 import java.io.IOException; 8 import java.io.InputStream; 9 import java.net.URL; 10 import java.net.URLConnection; 11 12 /** 13 * Handles loading of assets from a URL 14 * 15 * @author Kirill Vainer 16 */ 17 public class UrlAssetInfo extends AssetInfo { 18 19 private URL url; 20 private InputStream in; 21 create(AssetManager assetManager, AssetKey key, URL url)22 public static UrlAssetInfo create(AssetManager assetManager, AssetKey key, URL url) throws IOException { 23 // Check if URL can be reached. This will throw 24 // IOException which calling code will handle. 25 URLConnection conn = url.openConnection(); 26 conn.setUseCaches(false); 27 InputStream in = conn.getInputStream(); 28 29 // For some reason url cannot be reached? 30 if (in == null){ 31 return null; 32 }else{ 33 return new UrlAssetInfo(assetManager, key, url, in); 34 } 35 } 36 UrlAssetInfo(AssetManager assetManager, AssetKey key, URL url, InputStream in)37 private UrlAssetInfo(AssetManager assetManager, AssetKey key, URL url, InputStream in) throws IOException { 38 super(assetManager, key); 39 this.url = url; 40 this.in = in; 41 } 42 hasInitialConnection()43 public boolean hasInitialConnection(){ 44 return in != null; 45 } 46 47 @Override openStream()48 public InputStream openStream() { 49 if (in != null){ 50 // Reuse the already existing stream (only once) 51 InputStream in2 = in; 52 in = null; 53 return in2; 54 }else{ 55 // Create a new stream for subsequent invocations. 56 try { 57 URLConnection conn = url.openConnection(); 58 conn.setUseCaches(false); 59 return conn.getInputStream(); 60 } catch (IOException ex) { 61 throw new AssetLoadException("Failed to read URL " + url, ex); 62 } 63 } 64 } 65 } 66