/*

 * Copyright (c) 2015, 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_COMPILER_METHODMATCHER_HPP

#define SHARE_VM_COMPILER_METHODMATCHER_HPP

#include "memory/allocation.inline.hpp"

#include "runtime/handles.inline.hpp"

#include "memory/resourceArea.hpp"

class MethodMatcher : public CHeapObj<mtCompiler> {

 public:

  enum Mode {

    Exact,

    Prefix = 1,

    Suffix = 2,

    Substring = Prefix | Suffix,

    Any,

    Unknown = -1

  };

 protected:

  Symbol*        _class_name;

  Symbol*        _method_name;

  Symbol*        _signature;

  Mode           _class_mode;

  Mode           _method_mode;

 public:

  Symbol* class_name() const { return _class_name; }

  Mode class_mode() const { return _class_mode; }

  Symbol* method_name() const { return _method_name; }

  Mode method_mode() const { return _method_mode; }

  Symbol* signature() const { return _signature; }

  MethodMatcher();

  ~MethodMatcher();

  void init(Symbol* class_name, Mode class_mode, Symbol* method_name, Mode method_mode, Symbol* signature);

  static void parse_method_pattern(char*& line, const char*& error_msg, MethodMatcher* m);

  static void print_symbol(outputStream* st, Symbol* h, Mode mode);

  void print_base(outputStream* st);

 private:

  static bool canonicalize(char * line, const char *& error_msg);

  bool match(Symbol* candidate, Symbol* match, Mode match_mode) const;

};

class BasicMatcher : public MethodMatcher {

private:

  BasicMatcher* _next;

public:

  BasicMatcher() : MethodMatcher(),

    _next(NULL) {

  }

  BasicMatcher(BasicMatcher* next) :

    _next(next) {

  }

  static BasicMatcher* parse_method_pattern(char* line, const char*& error_msg) {

    assert(error_msg == NULL, "Dont call here with error_msg already set");

    BasicMatcher* bm = new BasicMatcher();

    MethodMatcher::parse_method_pattern(line, error_msg, bm);

    if (error_msg != NULL) {

      delete bm;

      return NULL;

    }

    // check for bad trailing characters

    int bytes_read = 0;

    sscanf(line, "%*[ \t]%n", &bytes_read);

    if (line[bytes_read] != '\0') {

      error_msg = "Unrecognized trailing text after method pattern";

      delete bm;

      return NULL;

    }

    return bm;

  }

    for (BasicMatcher* current = this; current != NULL; current = current->next()) {

      if (current->matches(method)) {

        return true;

      }

    }

    return false;

  }

  void set_next(BasicMatcher* next) { _next = next; }

  BasicMatcher* next() { return _next; }

  void print(outputStream* st) { print_base(st); }

  void print_all(outputStream* st) {

    print_base(st);

    if (_next != NULL) {

      _next->print_all(st);

    }

  }

};

#endif // SHARE_VM_COMPILER_METHODMATCHER_HPP