Android Open Source - Jello Jello

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License

The source code is released under:

Apache License

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Java Source Code

package com.atteo.jello;
// www . ja  va 2 s.c om
import java.io.File;
import java.io.IOException;

import android.content.Context;

import com.google.inject.Guice;
import com.google.inject.Injector;

public class Jello {
  public static final int OPEN_FAILED = 0;
  public static final int OPEN_READONLY = 1;
  public static final int OPEN_SUCCESS = 2;

  private static DatabaseFile dbFile;
  private static String fullpath;

  private static boolean isOpened = false;
  
  static Injector injector;

  public static void close() {
    dbFile.close();
    isOpened = false;
  }

  public static String getFullpath() {
    return fullpath;
  }

  public static int open(final Context context, final String filename) {
    final File file = context.getDatabasePath(filename);
    fullpath = file.getAbsolutePath();

    boolean isNew = false;

    if (!file.exists())
      isNew = true;

    if (isNew)
      try {
        file.getParentFile().mkdirs();
        file.createNewFile();
      } catch (final IOException e) {
        e.printStackTrace();
        return Jello.OPEN_FAILED;
      }

    loadEnvironment();

    dbFile = injector.getInstance(DatabaseFile.class);

    dbFile.open();

    if (isNew)
      if (dbFile.createStructure())
        return Jello.OPEN_SUCCESS;
      else
        return Jello.OPEN_FAILED;

    if (!dbFile.loadHeader())
      return Jello.OPEN_FAILED;

    injector = Guice.createInjector(new JelloModule(fullpath, dbFile.getReadProperties()));

    // recreate dbFile in case pageSize or other basic settings
    // read from the file have values different that the defaults
    dbFile = injector.getInstance(DatabaseFile.class);
    if (!dbFile.loadHeader())
      return Jello.OPEN_FAILED;

    if (!dbFile.loadStructure())
      return Jello.OPEN_FAILED;

    isOpened = true;
    return Jello.OPEN_SUCCESS;
  }
  
  public static boolean isOpened() {
    return isOpened;
  }

  public static void setInjector(final Injector injector) {
    Jello.injector = injector;
  }

  public static Injector getInjector() {
    return injector;
  }
  
  private static Injector createGuiceInjector() {
    return Guice.createInjector(new JelloModule(fullpath, null));
  }

  private static void loadEnvironment() {
    injector = createGuiceInjector();
  }
}

Java Source Code List