Throw IllegalArgumentException when url is null in LinkHandlerFactory

Author: TobiGr

extractor/src/main/java/org/schabi/newpipe/extractor/linkhandler/LinkHandlerFactory.java

@@ -34,7 +34,7 @@ public abstract class LinkHandlerFactory {
     public abstract String getUrl(String id) throws ParsingException;
     public abstract boolean onAcceptUrl(final String url) throws ParsingException;
 
-    public String getUrl(String id, String baseUrl) throws ParsingException{
+    public String getUrl(String id, String baseUrl) throws ParsingException {
        return getUrl(id);
     }
 
@@ -43,13 +43,14 @@ public String getUrl(String id, String baseUrl) throws ParsingException{
     ///////////////////////////////////
 
     public LinkHandler fromUrl(String url) throws ParsingException {
+        if (url == null) throw new IllegalArgumentException("url can not be null");
         final String baseUrl = Utils.getBaseUrl(url);
         return fromUrl(url, baseUrl);
     }
 
     public LinkHandler fromUrl(String url, String baseUrl) throws ParsingException {
-        if(url == null) throw new IllegalArgumentException("url can not be null");
-        if(!acceptUrl(url)) {
+        if (url == null) throw new IllegalArgumentException("url can not be null");
+        if (!acceptUrl(url)) {
             throw new ParsingException("Malformed unacceptable url: " + url);
         }
 
@@ -58,13 +59,13 @@ public LinkHandler fromUrl(String url, String baseUrl) throws ParsingException {
     }
 
     public LinkHandler fromId(String id) throws ParsingException {
-        if(id == null) throw new IllegalArgumentException("id can not be null");
+        if (id == null) throw new IllegalArgumentException("id can not be null");
         final String url = getUrl(id);
         return new LinkHandler(url, url, id);
     }
 
     public LinkHandler fromId(String id, String baseUrl) throws ParsingException {
-        if(id == null) throw new IllegalArgumentException("id can not be null");
+        if (id == null) throw new IllegalArgumentException("id can not be null");
         final String url = getUrl(id, baseUrl);
         return new LinkHandler(url, url, id);
     }