DbPuzzleSource.java :  » Game » andoku » com » googlecode » andoku » source » Android Open Source

/*
 * Andoku - a sudoku puzzle game for Android.
 * Copyright (C) 2009  Markus Wiederkehr
 *
 * This file is part of Andoku.
 *
 * Andoku is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Andoku 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Andoku.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.googlecode.andoku.source;

import com.googlecode.andoku.db.AndokuDatabase;
import com.googlecode.andoku.db.PuzzleInfo;
import com.googlecode.andoku.model.Difficulty;
import com.googlecode.andoku.model.Puzzle;
import com.googlecode.andoku.transfer.PuzzleDecoder;

class DbPuzzleSource implements PuzzleSource {
  private final AndokuDatabase db;
  private final long folderId;

  private int numberOfPuzzles = -1;

  public DbPuzzleSource(AndokuDatabase db, long folderId) {
    this.db = db;
    this.folderId = folderId;
  }

  public String getSourceId() {
    return PuzzleSourceIds.forDbFolder(folderId);
  }

  public PuzzleHolder load(int number) {
    PuzzleInfo puzzleInfo = db.loadPuzzle(folderId, number);
    if (puzzleInfo == null)
      throw new IndexOutOfBoundsException("Puzzle " + number + " not found in folder "
          + folderId);

    String name = puzzleInfo.getName();
    Puzzle puzzle = createPuzzle(puzzleInfo);
    Difficulty difficulty = puzzleInfo.getDifficulty();

    return new PuzzleHolder(this, number, name, puzzle, difficulty);
  }

  public int numberOfPuzzles() {
    if (numberOfPuzzles == -1)
      numberOfPuzzles = db.getNumberOfPuzzles(folderId);

    return numberOfPuzzles;
  }

  public void close() {
    db.close();
  }

  private Puzzle createPuzzle(PuzzleInfo puzzleInfo) {
    return PuzzleDecoder.decode(puzzleInfo.getClues() + "|" + puzzleInfo.getAreas() + "|"
        + puzzleInfo.getExtraRegions());
  }
}