1 files changed, 74 insertions, 0 deletions
diff --git a/src/main/java/org/cristalise/gui/ImageLoader.java b/src/main/java/org/cristalise/gui/ImageLoader.java
new file mode 100644
index 0000000..9af6fed
--- /dev/null
+++ b/src/main/java/org/cristalise/gui/ImageLoader.java
@@ -0,0 +1,74 @@
+package org.cristalise.gui;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Hashtable;
+
+import javax.swing.ImageIcon;
+
+import org.cristalise.kernel.common.ObjectNotFoundException;
+import org.cristalise.kernel.process.Gateway;
+import org.cristalise.kernel.utils.Logger;
+
+
+public class ImageLoader {
+
+    static private Hashtable<String, ImageIcon> imgCache = new Hashtable<String, ImageIcon>();
+    static public final ImageIcon nullImg = new ImageIcon(new byte[] { 0 });
+    static private final ArrayList<String> reportedMissingIcons = new ArrayList<String>();
+
+    /**
+     * Gets an image from the resource directories
+     *
+     * @param resName - filename after resources/images
+     * @return
+     */
+    static public ImageIcon findImage(String resName) {
+        try {
+        	for (String ns : Gateway.getResource().getModuleBaseURLs().keySet()) {
+        		try {
+        			return getImage(ns, resName);
+        		} catch (ObjectNotFoundException ex) { }
+			}
+            return getImage(null, resName);
+        } catch (ObjectNotFoundException ex) {
+        	if (!reportedMissingIcons.contains(resName)) {
+        		Logger.warning("Image '"+resName+"' not found. Using null icon");
+        		reportedMissingIcons.add(resName);
+        	}
+            return nullImg;
+        }
+    }
+
+    static public ImageIcon getImage(String ns, String resName) throws ObjectNotFoundException {
+        if (resName == null)
+            return nullImg;
+
+        if (imgCache.containsKey(ns+'/'+resName)) {
+            return imgCache.get(ns+'/'+resName);
+        }
+
+        URL imgLocation = null;
+        if (ns == null) 
+        	try {
+        		imgLocation = Gateway.getResource().getKernelResourceURL("images/"+resName);
+        	} catch (MalformedURLException ex) { }
+        else
+        	try {
+        		imgLocation = Gateway.getResource().getModuleResourceURL(ns, "images/"+resName);
+        	} catch (MalformedURLException ex) { }
+        
+        if (imgLocation!= null) {
+        	ImageIcon newImg = new ImageIcon(imgLocation);
+
+        	if (newImg.getIconHeight() > -1) {
+        		imgCache.put(ns+'/'+resName, newImg);
+                Logger.msg(3, "Loaded "+resName+" "+newImg.getIconWidth()+"x"+newImg.getIconHeight());
+                return newImg;
+        	}
+        }
+        throw new ObjectNotFoundException();
+    }
+
+}