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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * published by the Free Software Foundation.

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 * 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.

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#include "logging/logLevel.hpp"

#include "logging/logTag.hpp"

#include "memory/allocation.hpp"

class LogTagSet;

// Class representing a selection of tags with for a given level.

// Consists of a set of tags, an optional wildcard flag, and a level, e.g. "tag1+tag2*=level".

class LogSelection : public StackObj {

  friend class LogSelectionList;

 private:

  size_t _ntags;

  LogTagType _tags[LogTag::MaxTags];

  bool _wildcard;

  LogLevelType _level;

  size_t _tag_sets_selected;

  LogSelection();

 public:

  static const LogSelection Invalid;

  static LogSelection parse(const char* str, outputStream* error_stream = NULL);

  LogSelection(const LogTagType tags[LogTag::MaxTags], bool wildcard, LogLevelType level);

  bool operator==(const LogSelection& ref) const;

  bool operator!=(const LogSelection& ref) const;

  size_t ntags() const;

  LogLevelType level() const;

  size_t tag_sets_selected() const;

  bool selects(const LogTagSet& ts) const;

  bool consists_of(const LogTagType tags[LogTag::MaxTags]) const;

  int describe_tags(char* buf, size_t bufsize) const;

  int describe(char* buf, size_t bufsize) const;

  // List similar selections that matches existing tag sets on the given outputstream

  void suggest_similar_matching(outputStream* out) const;

  // Compute a similarity measure in the range [0, 1], where higher means more similar

  double similarity(const LogSelection& other) const;

};