1 files changed, 59 insertions, 0 deletions
diff --git a/nailgun_launcher/CbtURLClassLoader.java b/nailgun_launcher/CbtURLClassLoader.java
new file mode 100644
index 0000000..38fc905
--- /dev/null
+++ b/nailgun_launcher/CbtURLClassLoader.java
@@ -0,0 +1,59 @@
+package cbt;
+import java.io.*;
+import java.net.*;
+import java.util.*;
+import static cbt.Stage0Lib.*;
+import java.util.concurrent.ConcurrentHashMap;
+public class CbtURLClassLoader extends java.net.URLClassLoader{
+  public String toString(){
+    return (
+      super.toString()
+      + "(\n  "
+      + Arrays.toString(getURLs())
+      + ",\n  "
+      + join("\n  ",(getParent() == null?"":getParent().toString()).split("\n"))
+      + "\n)"
+    );
+  }
+  ClassLoaderCache2<Class> cache = new ClassLoaderCache2<Class>(
+    new ConcurrentHashMap<String, Object>(),
+    new ConcurrentHashMap<Object, Class>()
+  );
+  public Class loadClass(String name) throws ClassNotFoundException{
+    Class _class = super.loadClass(name);
+    if(_class == null) throw new ClassNotFoundException(name);
+    else return _class;
+  }
+  public Class loadClass(String name, Boolean resolve) throws ClassNotFoundException{
+    //System.out.println("loadClass("+name+") on \n"+this);
+    if(!cache.contains(name))
+      try{
+        cache.put(super.loadClass(name, resolve), name);
+      } catch (ClassNotFoundException e){
+        cache.put(Object.class, name);
+      }
+    Class _class = cache.get(name);
+    if(_class == Object.class){
+      if( name == "java.lang.Object" )
+        return Object.class;
+      else return null;
+    } else {
+      return _class;
+    }
+  }
+  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, null);
+    assertExist(urls);
+  }
+}
+\ No newline at end of file