1 files changed, 31 insertions, 0 deletions
diff --git a/nailgun_launcher/CBTUrlClassLoader.java b/nailgun_launcher/CBTUrlClassLoader.java
new file mode 100644
index 0000000..72423a0
--- /dev/null
+++ b/nailgun_launcher/CBTUrlClassLoader.java
@@ -0,0 +1,31 @@
+package cbt;
+import java.io.*;
+import java.net.*;
+import java.util.*;
+class CbtURLClassLoader extends URLClassLoader{
+  public String toString(){
+    return (
+      super.toString()
+      + "(\n  "
+      + Arrays.toString(getURLs())
+      + ",\n  "
+      + String.join("\n  ",getParent().toString().split("\n"))
+      + "\n)"
+    );
+  }
+  void assertExist(URL[] urls){
+    for(URL url: urls){
+      if(!new File(url.getPath()).exists()){
+        throw new AssertionError("File does not exist when trying to create CbtURLClassLoader: "+url);
+      }
+    }
+  }
+  public CbtURLClassLoader(URL[] urls, ClassLoader parent){
+    super(urls, parent);
+    assertExist(urls);
+  }
+  public CbtURLClassLoader(URL[] urls){
+    super(urls);
+    assertExist(urls);
+  }
+}
+\ No newline at end of file