8046070: Class Data Sharing clean up and refactoring

Cleaned up CDS to be more configurable, maintainable and extensible

Reviewed-by: dholmes, coleenp, acorn, mchung

hotspot/src/share/vm/classfile/classLoaderExt.hpp

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_CLASSFILE_CLASSLOADEREXT_HPP
+#define SHARE_VM_CLASSFILE_CLASSLOADEREXT_HPP
+
+#include "classfile/classLoader.hpp"
+
+class ClassLoaderExt: public ClassLoader { // AllStatic
+public:
+
+  class Context {
+    const char* _file_name;
+  public:
+    Context(const char* class_name, const char* file_name, TRAPS) {
+      _file_name = file_name;
+    }
+
+    bool check(ClassFileStream* stream, const int classpath_index) {
+      return true;
+    }
+
+    bool should_verify(int classpath_index) {
+      return false;
+    }
+
+    instanceKlassHandle record_result(const int classpath_index,
+                                      ClassPathEntry* e, instanceKlassHandle result, TRAPS) {
+      if (ClassLoader::add_package(_file_name, classpath_index, THREAD)) {
+        if (DumpSharedSpaces) {
+          result->set_shared_classpath_index(classpath_index);
+        }
+        return result;
+      } else {
+        return instanceKlassHandle(); // NULL
+      }
+    }
+  };
+
+
+  static void add_class_path_entry(char* path, bool check_for_duplicates,
+                            ClassPathEntry* new_entry) {
+    ClassLoader::add_to_list(new_entry);
+  }
+  static void setup_search_paths() {}
+};
+
+#endif // SHARE_VM_CLASSFILE_CLASSLOADEREXT_HPP