ExtremeTablePageRequestFactory.java

package cn.org.rapid_framework.extremecomponents;

import java.sql.Timestamp;
import java.util.HashMap;
import java.util.Map;

import org.extremecomponents.table.limit.Filter;
import org.extremecomponents.table.limit.Limit;
import org.extremecomponents.table.limit.Sort;

import cn.org.rapid_framework.beanutils.BeanUtils;
import cn.org.rapid_framework.page.PageRequest;

/**
 * @author badqiu
 */
public class ExtremeTablePageRequestFactory {
	
    /**
	 * 通过ExtremeTable的Limit对象创建PageRequest对象
	 * @param limit
	 * @param defaultSortColumns 默认的排序字段s,如 username desc,age asc
	 * @return
	 * @deprecated 使用bindPageRequest()替换
	 */
	public static PageRequest<Map> createFromLimit(Limit limit,String defaultSortColumns) {
		PageRequest result = new PageRequest();
		return bindPageRequest(result,limit, defaultSortColumns);
	}
	
	/**
	 * @deprecated 使用bindPageRequest()替换
	 */
    public static PageRequest createFromLimit(Limit limit) {
        return createFromLimit(limit,null);
    }
	
    /**
     * 绑定PageRequest的属性值
     */
    public static PageRequest<Map> bindPageRequest(PageRequest pageRequest,Limit limit,String defaultSortColumns) {
        Map filters = getFilters(limit);
        pageRequest.setFilters(filters);
        BeanUtils.copyProperties(pageRequest, filters);
        
        pageRequest.setPageNumber(limit.getPage());
		pageRequest.setPageSize(limit.getCurrentRowsDisplayed());
		pageRequest.setSortColumns(getSortingColumns(limit, defaultSortColumns));
		return pageRequest;
    }
	
	private static Map getFilters(Limit limit) {
		Filter[] filters = limit.getFilterSet().getFilters();
		Map result = new HashMap();
		for(int i = 0; i < filters.length; i++) {
			Filter filter = filters[i];
			result.put(filter.getAlias(), filter.getValue());
		}
		return result;
	}

	private static String getSortingColumns(Limit limit, String defaultSortColumns) {
		Sort sort = limit.getSort();
		if(sort.getProperty() == null) {
			return defaultSortColumns;
		}
		
		String sortOrder = sort.getSortOrder() == null ? ""  : " " + sort.getSortOrder();
		String column = sort.isAliased() ? sort.getAlias() : sort.getProperty();
		String sortColumns = column + sortOrder;
		return sortColumns;
	}

}