package fengyun.Fastmail.beans;

public class Pager {
  private int start = 0;
  private int end = 0;
  private int totalCount = 0;
  private int currentPage = 0;
  private int totalPage = 0;
  private int pageSize = 20;
  public Pager(int total,int page,int size) {
    totalCount = total;
    currentPage = page;
    pageSize = size;
    totalPage = (totalCount - 1)/ pageSize + 1;
    if (page < 1) page = 1;if (page > totalPage) page = totalPage;
    start = (page-1) * pageSize + 1;
    end = Math.min(totalCount,page * pageSize);
  }
  public void setPageSize(int pageSize) { this.pageSize = pageSize; }
  public void setTotalCount(int totalCount) { this.totalCount = totalCount; }
  public void setCurrentPage(int currentPage) { this.currentPage = currentPage; }
  public boolean isFirstPage() { return (currentPage == 1); }
  public boolean isLastPage() { return (currentPage == totalPage); }
  public int getStart() { return start; }
  public int getEnd() { return end; }
}