Android Open Source - InMemoryDb Database Purger Max Date

From Project

Back to project page InMemoryDb.

License

The source code is released under:

Apache License

If you think the Android project InMemoryDb listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

package org.gawst.asyncdb.purge;
/*  w  ww .  jav  a 2s  .com*/
import android.database.Cursor;
import android.support.annotation.Nullable;

import org.gawst.asyncdb.source.DatabaseSource;

/**
 * Helper class to purge a database with a maximum number of items and based on a date field.
 *
 * @author Created by robUx4 on 07/01/2015.
 */
public class DatabasePurgerMaxDate extends DatabaseSourcePurgerMax<Long> {
  /**
   * Constructor for the database purger. It will purge the database after each insertion.
   *
   * @param maxItems       Maximum number of items to keep in the database.
   * @param dateField      Date field in the database.
   * @param databaseSource Database source (Sqlite, ContentProvider)
   */
  public DatabasePurgerMaxDate(int maxItems, String dateField, DatabaseSource<?, ?> databaseSource) {
    super(maxItems, dateField, databaseSource);
  }

  /**
   * Constructor for the database purger.
   *
   * @param maxItems             Maximum number of items to keep in the database.
   * @param checkInsertFrequency The number of insertion before a purge is done. A purge is done after the first insertion.
   * @param dateField            Date field in the database.
   * @param databaseSource       Database source (Sqlite, ContentProvider)
   */
  public DatabasePurgerMaxDate(int maxItems, int checkInsertFrequency, String dateField, DatabaseSource<?, ?> databaseSource) {
    super(maxItems, checkInsertFrequency, dateField, databaseSource);
  }

  @Nullable
  @Override
  protected final Long getLastFilteredElement(Cursor cursor) {
    int freshnessIndex = cursor.getColumnIndex(fieldName);
    if (cursor.isNull(freshnessIndex))
      return null;
    return cursor.getLong(freshnessIndex);
  }
}

Java Source Code List