mgm-daylight-mcrm-api-mobile/src/main/java/com/mgm/mcrm/common/dtos/BaseQueryRequest.java

package com.mgm.mcrm.common.dtos;

import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

@Getter
@Setter
@NoArgsConstructor
public class BaseQueryRequest {
	private int startRow = -1;
	private int endRow = -1;

    public int getPageSize() {
        validatePageInfo();
        return pageSize;
    }

    public int getPageNo() {
        validatePageInfo();
        return pageNo;
    }

    private int pageSize = -1;
    private int pageNo=-1;
	private String sortOrder;
    private boolean pageInfoValidated=false;

    private void validatePageInfo() {
        if(pageInfoValidated)
            return;
        if(pageSize<0){
            if(startRow>=0 && endRow>=0){
                pageSize=endRow-startRow;
            }else{
                pageSize=20;
            }
        }
        if(pageNo<=0){
            if(startRow>=0){
                pageNo = (startRow+1)/pageSize;
                if(pageNo<0) {
                    pageNo=0;
                }
            }else{
                pageNo=0;
            }
        }else{
            pageNo--;
        }
        pageInfoValidated=true;
    }
}