JRuby lexer boilerplate with actual input.

This doesn't actually lex anything just yet but at least the input from Ruby is
in place.

ext/liboga/LibogaService.java

@@ -10,16 +10,7 @@ public class LibogaService implements BasicLibraryService
 {
     public boolean basicLoad(final Ruby runtime) throws IOException
     {
-        RubyModule xml = (RubyModule) runtime.getModule("Oga")
+        org.liboga.xml.Lexer.load(runtime);
-            .getConstant("XML");
-
-        RubyClass lexer = xml.defineClassUnder(
-            "Lexer",
-            runtime.getObject(),
-            runtime.getObject().getAllocator()
-        );
-
-        lexer.defineAnnotatedMethods(org.liboga.xml.Lexer.class);
 
         return true;
     }

ext/liboga/org/liboga/xml/Lexer.rl

@@ -4,13 +4,17 @@ package org.liboga.xml;
 
 import java.io.IOException;
 
+import org.jcodings.Encoding;
+
 import org.jruby.Ruby;
 import org.jruby.RubyModule;
 import org.jruby.RubyClass;
 import org.jruby.RubyObject;
+import org.jruby.RubyString;
 import org.jruby.anno.JRubyClass;
 import org.jruby.anno.JRubyMethod;
 import org.jruby.runtime.ThreadContext;
+import org.jruby.runtime.ObjectAllocator;
 import org.jruby.runtime.builtin.IRubyObject;
 
 @JRubyClass(name="Oga::XML::Lexer", parent="Object")
@@ -18,6 +22,28 @@ public class Lexer extends RubyObject
 {
     %% write data;
 
+    public static void load(Ruby runtime)
+    {
+        RubyModule xml = (RubyModule) runtime.getModule("Oga")
+            .getConstant("XML");
+
+        RubyClass lexer = xml.defineClassUnder(
+            "Lexer",
+            runtime.getObject(),
+            ALLOCATOR
+        );
+
+        lexer.defineAnnotatedMethods(Lexer.class);
+    }
+
+    private static final ObjectAllocator ALLOCATOR = new ObjectAllocator()
+    {
+        public IRubyObject allocate(Ruby runtime, RubyClass klass)
+        {
+            return new org.liboga.xml.Lexer(runtime, klass);
+        }
+    };
+
     public Lexer(Ruby runtime, RubyClass klass)
     {
         super(runtime, klass);
@@ -26,22 +52,27 @@ public class Lexer extends RubyObject
     @JRubyMethod
     public IRubyObject advance_native(ThreadContext context)
     {
+        // Pull the data in from Ruby land.
+        RubyString rb_str = (RubyString) this.getInstanceVariable("@data");
+        Encoding encoding = rb_str.getEncoding();
+
+        byte[] data = rb_str.getBytes();
+
         int act = 0;
         int cs  = 0;
         int ts  = 0;
         int te  = 0;
         int p   = 0;
-        int pe  = 0;
+        int pe  = data.length;
         int eof = 0;
         int top = 0;
 
-        int[] data  = {};
         int[] stack = {};
 
         %% write init;
         %% write exec;
 
-        return context.getRuntime().getNil();
+        return context.nil;
     }
 }