net.hasor.db.jdbc.page.Page Maven / Gradle / Ivy
/*
* Copyright 2002-2005 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.hasor.db.jdbc.page;
import java.sql.SQLException;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* 分页
* @version : 2021-02-04
* @author 赵永春 ([email protected])
*/
public interface Page {
/** 获取页大小，默认是 -1 标示无穷大。 */
public int getPageSize();
/** 设置分页的页大小，-1标示无穷大 */
public void setPageSize(int pageSize);
/**取当前页号 */
public int getCurrentPage();
/** 设置前页号 */
public void setCurrentPage(int currentPage);
public int getPageNumberOffset();
public void setPageNumberOffset(int pageNumberOffset);
/** 获取本页第一个记录的索引位置 */
public int getFirstRecordPosition();
/** 获取总页数 */
public int getTotalPage() throws SQLException;
/** 获取记录总数 */
public int getTotalCount() throws SQLException;
/** 移动到第一页 */
public default void firstPage() {
setCurrentPage(0);
}
/** 移动到上一页 */
public default void previousPage() {
setCurrentPage(getCurrentPage() - 1);
}
/** 移动到下一页 */
public default void nextPage() {
setCurrentPage(getCurrentPage() + 1);
}
/** 移动到最后一页 */
public default void lastPage() throws SQLException {
setCurrentPage(getTotalPage() - 1);
}
/** 获取分页的页大小 */
public default Map toPageInfo() throws SQLException {
return new LinkedHashMap() {{
put("enable", getPageSize() > 0);
put("pageSize", getPageSize());
put("totalCount", getTotalCount());
put("totalPage", getTotalPage());
put("currentPage", getCurrentPage());
put("recordPosition", getFirstRecordPosition());
}};
}
}