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io.github.icodegarden.commons.lang.util.PageHelperUtils Maven / Gradle / Ivy
package io.github.icodegarden.commons.lang.util;
import java.util.List;
import java.util.function.Function;
import java.util.stream.Collectors;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import io.github.icodegarden.commons.lang.query.BaseQuery;
import io.github.icodegarden.commons.lang.query.NextQuerySupportArrayList;
import io.github.icodegarden.commons.lang.query.NextQuerySupportList;
import io.github.icodegarden.commons.lang.query.NextQuerySupportPage;
/**
*
* @author Fangfang.Xu
*
*/
public abstract class PageHelperUtils {
/**
* 是否执行了分页，即是否执行了PageHelper.startPage 且 正在分页中 page = PageHelper.getLocalPage();
return page != null;
}
/**
* 是否执行count，即是否执行了PageHelper.startPage 且 正在分页中 + count参数=true page = PageHelper.getLocalPage();
return page != null ? page.isCount() : false;
}
/**
* 只转换类型
*/
public static Page ofPage(Page page, Function elementConvertor) {
Page newPage = new Page(page.getPageNum(), page.getPageSize());
newPage.setTotal(page.getTotal());
newPage.setPages(page.getPages());
newPage.setCount(page.isCount());
newPage.setOrderBy(page.getOrderBy());
convertAddAll(page, elementConvertor, newPage);
return newPage;
}
/**
* 自适应可能不进行count
*/
public static Page ofPageNoCountAdapt(Page page) {
ofPageNoCountAdapt(page, BaseQuery.MAX_TOTAL_COUNT);
return page;
}
/**
* 自适应可能不进行count
*
* @param maxTotal 当没有进行count时，限制的最多条数，例如10000条
*/
public static Page ofPageNoCountAdapt(Page page, long maxTotal) {
noCountAdapt(page, page, maxTotal);
return page;
}
/**
* 自适应可能不进行count
*/
public static Page ofPageNoCountAdapt(Page page, Function elementConvertor) {
return ofPageNoCountAdapt(page, elementConvertor, BaseQuery.MAX_TOTAL_COUNT);
}
/**
* 自适应可能不进行count
*
* @param maxTotal 当没有进行count时，限制的最多条数，例如10000条
*/
public static Page ofPageNoCountAdapt(Page page, Function elementConvertor, long maxTotal) {
Page newPage = new Page(page.getPageNum(), page.getPageSize());
noCountAdapt(page, newPage, maxTotal);
convertAddAll(page, elementConvertor, newPage);
return newPage;
}
/**
* 自适应可能不进行count
*
* 分页的按正常处理 void convertAddAll(Page page, Function elementConvertor, Page targetPage) {
if (!page.getResult().isEmpty()) {
List list = page.getResult().stream().map(t -> {
return elementConvertor.apply(t);
}).collect(Collectors.toList());
targetPage.addAll(list);
}
}
// ----------------------------------------------------------
/**
* Page 转 NextQuerySupportPage
*/
public static NextQuerySupportPage pageToNextQuerySupportPage(Page page,
Function searchAfterSupplier) {
NextQuerySupportList nextQuerySupportList = NextQuerySupportArrayList.newSupportSearchAfter(page,
searchAfterSupplier);
return new NextQuerySupportPage(page.getPageNum(), page.getPageSize(), page.getTotal(), page.isCount(),
page.getOrderBy(), nextQuerySupportList);
}
/**
* Page 转 NextQuerySupportPage
*/
public static NextQuerySupportPage pageToNextQuerySupportPage(Page page,
Function elementConvertor, Function searchAfterSupplier) {
NextQuerySupportList nextQuerySupportList = NextQuerySupportArrayList.newSupportSearchAfter(page,
elementConvertor, searchAfterSupplier);
return new NextQuerySupportPage(page.getPageNum(), page.getPageSize(), page.getTotal(), page.isCount(),
page.getOrderBy(), nextQuerySupportList);
}
/**
* 只转换类型
*/
public static NextQuerySupportPage ofNextQuerySupportPage(NextQuerySupportPage page,
Function elementConvertor) {
NextQuerySupportList nextQuerySupportList = NextQuerySupportArrayList.newSupportSearchAfter(page,
elementConvertor, one -> page.getSearchAfter());
return new NextQuerySupportPage(page.getPageNum(), page.getPageSize(), page.getTotal(), page.isCount(),
page.getOrderBy(), nextQuerySupportList);
}
/**
* 自适应可能不进行count
*/
public static NextQuerySupportPage ofNextQuerySupportPageNoCountAdapt(NextQuerySupportPage page) {
return ofNextQuerySupportPageNoCountAdapt(page, BaseQuery.MAX_TOTAL_COUNT);
}
/**
* 自适应可能不进行count
*
* @param maxTotal 当没有进行count时，限制的最多条数，例如10000条
*/
public static NextQuerySupportPage ofNextQuerySupportPageNoCountAdapt(NextQuerySupportPage page,
long maxTotal) {
noCountAdapt(page, page, maxTotal);
return page;
}
/**
* 自适应可能不进行count
*/
public static NextQuerySupportPage ofNextQuerySupportPageNoCountAdapt(NextQuerySupportPage page,
Function elementConvertor) {
return ofNextQuerySupportPageNoCountAdapt(page, elementConvertor, BaseQuery.MAX_TOTAL_COUNT);
}
/**
* 自适应可能不进行count
*
* @param maxTotal 当没有进行count时，限制的最多条数，例如10000条
*/
public static NextQuerySupportPage ofNextQuerySupportPageNoCountAdapt(NextQuerySupportPage page,
Function elementConvertor, long maxTotal) {
NextQuerySupportPage newPage = ofNextQuerySupportPage(page, elementConvertor);
noCountAdapt(page, newPage, maxTotal);
return newPage;
}
}
