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Java example source code file (diagnosticArgument.hpp)

This example Java source code file (diagnosticArgument.hpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

argtype, cheapobj, dcmdargument, free_c_heap_array, gendcmdargument, growablearray, memorysizeargument, new_c_heap_array, null, resourceobj, sanity, share_vm_services_diagnosticargument_hpp, stringarrayargument, traps

The diagnosticArgument.hpp Java example source code

/*
 * Copyright (c) 2012, 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_SERVICES_DIAGNOSTICARGUMENT_HPP
#define SHARE_VM_SERVICES_DIAGNOSTICARGUMENT_HPP

#include "classfile/vmSymbols.hpp"
#include "memory/allocation.hpp"
#include "runtime/os.hpp"
#include "runtime/thread.hpp"
#include "utilities/exceptions.hpp"

class StringArrayArgument : public CHeapObj<mtInternal> {
private:
  GrowableArray<char*>* _array;
public:
  StringArrayArgument() {
    _array = new(ResourceObj::C_HEAP, mtInternal)GrowableArray<char *>(32, true);
    assert(_array != NULL, "Sanity check");
  }
  void add(const char* str, size_t len) {
    if (str != NULL) {
      char* ptr = NEW_C_HEAP_ARRAY(char, len+1, mtInternal);
      strncpy(ptr, str, len);
      ptr[len] = 0;
      _array->append(ptr);
    }
  }
  GrowableArray<char*>* array() {
    return _array;
  }
  ~StringArrayArgument() {
    for (int i=0; i<_array->length(); i++) {
      if(_array->at(i) != NULL) { // Safety check
        FREE_C_HEAP_ARRAY(char, _array->at(i), mtInternal);
      }
    }
    delete _array;
  }
};

class NanoTimeArgument {
public:
  jlong _nanotime;
  jlong _time;
  char _unit[3];
};

class MemorySizeArgument {
public:
  u8 _size;
  u8 _val;
  char _multiplier;
};

class GenDCmdArgument : public ResourceObj {
protected:
  GenDCmdArgument* _next;
  const char*      _name;
  const char*      _description;
  const char*      _type;
  const char*      _default_string;
  bool             _is_set;
  bool             _is_mandatory;
  bool             _allow_multiple;
  GenDCmdArgument(const char* name, const char* description, const char* type,
                  const char* default_string, bool mandatory) {
    _name = name;
    _description = description;
    _type = type;
    _default_string = default_string;
    _is_mandatory = mandatory;
    _is_set = false;
    _allow_multiple = false;
  };
public:
  const char* name() { return _name; }
  const char* description() { return _description; }
  const char* type() { return _type; }
  const char* default_string() { return _default_string; }
  bool is_set() { return _is_set; }
  void set_is_set(bool b) { _is_set = b; }
  bool allow_multiple() { return _allow_multiple; }
  bool is_mandatory() { return _is_mandatory; }
  bool has_value() { return _is_set || _default_string != NULL; }
  bool has_default() { return _default_string != NULL; }
  void read_value(const char* str, size_t len, TRAPS);
  virtual void parse_value(const char* str, size_t len, TRAPS) = 0;
  virtual void init_value(TRAPS) = 0;
  virtual void reset(TRAPS) = 0;
  virtual void cleanup() = 0;
  virtual void value_as_str(char* buf, size_t len) = 0;
  void set_next(GenDCmdArgument* arg) {
    _next = arg;
  }
  GenDCmdArgument* next() {
    return _next;
  }

  void to_string(jlong l, char* buf, size_t len);
  void to_string(bool b, char* buf, size_t len);
  void to_string(char* c, char* buf, size_t len);
  void to_string(NanoTimeArgument n, char* buf, size_t len);
  void to_string(MemorySizeArgument f, char* buf, size_t len);
  void to_string(StringArrayArgument* s, char* buf, size_t len);
};

template <class ArgType> class DCmdArgument: public GenDCmdArgument {
private:
  ArgType _value;
public:
  DCmdArgument(const char* name, const char* description, const char* type,
               bool mandatory) :
               GenDCmdArgument(name, description, type, NULL, mandatory) { }
  DCmdArgument(const char* name, const char* description, const char* type,
               bool mandatory, const char* defaultvalue) :
               GenDCmdArgument(name, description, type, defaultvalue, mandatory)
               { }
  ~DCmdArgument() { destroy_value(); }
  ArgType value() { return _value;}
  void set_value(ArgType v) { _value = v; }
  void reset(TRAPS) {
    destroy_value();
    init_value(CHECK);
    _is_set = false;
  }
  void cleanup() {
    destroy_value();
  }
  void parse_value(const char* str, size_t len, TRAPS);
  void init_value(TRAPS);
  void destroy_value();
  void value_as_str(char *buf, size_t len) { return to_string(_value, buf, len);}
};

#endif  /* SHARE_VM_SERVICES_DIAGNOSTICARGUMENT_HPP */

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