Fixed media not showing up

WebContent/page_gallery.jsp

@@ -38,7 +38,7 @@
                 <div class="grid image-grid">
                     <c:forEach items="${media}" var="item">
                         <div class="grid-item photo-thumb col-md-3 col-sm-6 col-xs-12">
-                            <img class="img-responsive" src="${ContentServlet.getMediaUrl(item, Media.Size.SMALL)}"/>
+                            <img class="img-responsive" src="${item.getUrlSmall()}"/>
                         </div>
                     </c:forEach>
                 </div>

src/zall/bean/Folder.java

@@ -29,6 +29,9 @@ public class Folder extends DBBean {
     }
 
     public static List<Folder> loadSubFolders(DBConnection db, Folder folder) throws SQLException {
+        if (folder == null || folder.getId() == null)
+            return Collections.emptyList();
+
         PreparedStatement sql = db.getPreparedStatement("SELECT * FROM Folder WHERE parent=?");
         sql.setLong(1, folder.getId());
         return DBConnection.exec(sql, DBBeanSQLResultHandler.createList(Folder.class, db));

src/zall/bean/Image.java

@@ -6,6 +6,7 @@ import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.sql.PreparedStatement;
 import java.sql.SQLException;
+import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.logging.Logger;
@@ -37,7 +38,8 @@ public class Image extends Media {
      */
     public static List<Image> loadFolder(DBConnection db, Folder folder) throws SQLException {
         if (folder == null || folder.getId() == null)
-            return new LinkedList<Image>();
+            return Collections.emptyList();
+
         PreparedStatement sql = db.getPreparedStatement("SELECT * FROM Image WHERE folder=? ORDER BY dateUploaded DESC");
         sql.setLong(1, folder.getId());
         return DBConnection.exec(sql, DBBeanSQLResultHandler.createList(Image.class, db));
@@ -64,6 +66,7 @@ public class Image extends Media {
     public void setFile(FileItem item) throws Exception {
         if (folder == null)
             throw new Exception("Folder not set for image!");
+
         // Generate unique filename
         fileName = ResourceManager.generateFileName();
         fileExtension = FileUtil.getFileExtension(item.getName());

src/zall/bean/Media.java

@@ -14,6 +14,7 @@ import java.util.logging.Logger;
 import org.apache.commons.fileupload.FileItem;
 
 import zall.manager.ResourceManager;
+import zall.page.ContentServlet;
 import zutil.db.DBConnection;
 import zutil.db.bean.DBBean;
 import zutil.log.LogUtil;
@@ -134,6 +135,18 @@ public abstract class Media extends DBBean implements Comparable<Media> {
         return ResourceManager.getFile(this, size);
     }
 
-
     public abstract Type getType();
+
+    public String getUrlSmall() {
+        return ContentServlet.getMediaUrl(this, Size.SMALL);
+    }
+    public String getUrlMedium() {
+        return ContentServlet.getMediaUrl(this, Size.MEDIUM);
+    }
+    public String getUrlLarge() {
+        return ContentServlet.getMediaUrl(this, Size.LARGE);
+    }
+    public String getUrlOriginal() {
+        return ContentServlet.getMediaUrl(this, Size.ORIGINAL);
+    }
 }

src/zall/bean/Video.java

@@ -2,6 +2,7 @@ package zall.bean;
 
 import java.sql.PreparedStatement;
 import java.sql.SQLException;
+import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
 
@@ -42,7 +43,8 @@ public class Video extends Media {
      */
     public static List<Video> loadFolder(DBConnection db, Folder folder) throws SQLException {
         if (folder == null || folder.getId() == null)
-            return new LinkedList<Video>();
+            return Collections.emptyList();
+
         PreparedStatement sql = db.getPreparedStatement("SELECT * FROM Video WHERE folder=? ORDER BY dateUploaded DESC");
         sql.setLong(1, folder.getId());
         return DBConnection.exec(sql, DBBeanSQLResultHandler.createList(Video.class, db));
@@ -88,6 +90,7 @@ public class Video extends Media {
     public void setFile(FileItem item) throws Exception {
         if (folder == null)
             throw new Exception("Folder not set for Video!");
+
         // Generate unique filename
         fileName = ResourceManager.generateFileName();
         fileExtension = "." + FileUtil.getFileExtension(item.getName());