imported brians code

[nestedvm.git] / src / org / xwt / mips / ClassLoader.java

diff --git a/src/org/xwt/mips/ClassLoader.java b/src/org/xwt/mips/ClassLoader.java
new file mode 100644 (file)
index 0000000..510d309
--- /dev/null
+++ b/src/org/xwt/mips/ClassLoader.java
@@ -0,0 +1,44 @@
+package org.xwt.mips;
+
+import java.io.*;
+
+// FEATURE: This is just a quick hack, it is really ugly and broken
+
+public class ClassLoader extends java.lang.ClassLoader {
+    public Class loadClass(String name, boolean resolve) throws ClassNotFoundException {
+        Class c;
+        if(name.startsWith("mips.")) {
+            String path = name.substring(5).replace('.','/') + ".mips";
+            try {
+                ByteArrayOutputStream bos = new ByteArrayOutputStream();
+                new ClassFileCompiler(path,name,bos).go();
+                bos.close();
+                byte[] buf = bos.toByteArray();
+                c = defineClass(name,buf,0,buf.length);
+            } catch(IOException e) {
+                throw new ClassNotFoundException(name);
+            } catch(Compiler.Exn e) {
+                throw new ClassNotFoundException(e.getMessage());
+            }
+        } else {
+            c = findSystemClass(name);
+        }
+            
+        if(c == null) throw new ClassNotFoundException(name);
+        if(resolve) resolveClass(c);
+        return c;
+    }
+    
+    public Class classFromBinary(String path) throws ClassNotFoundException {
+        if(!path.endsWith(".mips")) throw new IllegalArgumentException("isn't a .mips");
+        return loadClass("mips." + path.substring(0,path.length()-5).replace('/','.'));
+    }
+    
+    public Runtime runtimeFromBinary(String path) throws ClassNotFoundException, IllegalAccessException, InstantiationException {
+        return (Runtime) classFromBinary(path).newInstance();
+    }
+    
+    public static void main(String[] args) throws Exception {
+        System.exit(new ClassLoader().runtimeFromBinary(args[0]).run(args));
+    }
+}