start work on reflection; bugfixes

classpath/java/lang/Class.java

@@ -1,5 +1,8 @@
 package java.lang;
 
+import java.lang.reflect.Method;
+import java.lang.reflect.Field;
+
 public final class Class <T> {
   private short flags;
   private byte vmFlags;
@@ -9,16 +12,57 @@ public final class Class <T> {
   private int[] objectMask;
   private byte[] name;
   private Class super_;
-  private Object interfaceTable;
-  private Object virtualTable;
-  private Object fieldTable;
-  private Object methodTable;
-  private Object staticTable;
-  private Object initializer;
+  private Object[] interfaceTable;
+  private Method[] virtualTable;
+  private Field[] fieldTable;
+  private Method[] methodTable;
+  private Object[] staticTable;
+  private Method initializer;
 
   private Class() { }
 
   public String getName() {
     return new String(name, 0, name.length - 1, false);
   }
+
+  public static native Class forName(String name);
+
+  public native boolean isAssignableFrom(Class c);
+
+  public Field getDeclaredField(String name) throws NoSuchFieldException {
+    for (int i = 0; i < fieldTable.length; ++i) {
+      if (fieldTable[i].getName().equals(name)) {
+        return fieldTable[i];
+      }
+    }
+
+    throw new NoSuchFieldException(name);
+  }
+
+  private static boolean match(Class[] a, Class[] b) {
+    if (a.length == b.length) {
+      for (int i = 0; i < a.length; ++i) {
+        if (! a[i].isAssignableFrom(b[i])) {
+          return false;
+        }
+      }
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  public Method getDeclaredMethod(String name, Class ... parameterTypes)
+    throws NoSuchMethodException
+  {
+    for (int i = 0; i < methodTable.length; ++i) {
+      if (methodTable[i].getName().equals(name)
+          && match(parameterTypes, methodTable[i].getParameterTypes()))
+      {
+        return methodTable[i];
+      }
+    }
+
+    throw new NoSuchMethodException(name);
+  }
 }