com.github.pagehelper.page.PageParams.java Source code

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Here is the source code for com.github.pagehelper.page.PageParams.java

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2017 abel533@gmail.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.github.pagehelper.page;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.util.PageObjectUtil;
import org.apache.ibatis.session.RowBounds;

import java.util.Properties;

/**
 * Page ??
 *
 * @author liuzh
 */
public class PageParams {
    //RowBounds?offsetPageNum - ?
    protected boolean offsetAsPageNum = false;
    //RowBounds?count - ?
    protected boolean rowBoundsWithCount = false;
    //truepagesize0RowBoundslimit=0?
    protected boolean pageSizeZero = false;
    //??
    protected boolean reasonable = false;
    //??????false
    protected boolean supportMethodsArguments = false;

    /**
     * ??
     *
     * @param parameterObject
     * @param rowBounds
     * @return
     */
    public Page getPage(Object parameterObject, RowBounds rowBounds) {
        Page page = PageHelper.getLocalPage();
        if (page == null) {
            if (rowBounds != RowBounds.DEFAULT) {
                if (offsetAsPageNum) {
                    page = new Page(rowBounds.getOffset(), rowBounds.getLimit(), rowBoundsWithCount);
                } else {
                    page = new Page(new int[] { rowBounds.getOffset(), rowBounds.getLimit() }, rowBoundsWithCount);
                    //offsetAsPageNum=falsePageNum?reasonablefalse
                    page.setReasonable(false);
                }
            } else {
                try {
                    page = PageObjectUtil.getPageFromObject(parameterObject, false);
                } catch (Exception e) {
                    return null;
                }
            }
            if (page == null) {
                return null;
            }
            PageHelper.setLocalPage(page);
        }
        //??
        if (page.getReasonable() == null) {
            page.setReasonable(reasonable);
        }
        //truepagesize0RowBoundslimit=0?
        if (page.getPageSizeZero() == null) {
            page.setPageSizeZero(pageSizeZero);
        }
        return page;
    }

    public void setProperties(Properties properties) {
        //offsetPageNum
        String offsetAsPageNum = properties.getProperty("offsetAsPageNum");
        this.offsetAsPageNum = Boolean.parseBoolean(offsetAsPageNum);
        //RowBounds???count
        String rowBoundsWithCount = properties.getProperty("rowBoundsWithCount");
        this.rowBoundsWithCount = Boolean.parseBoolean(rowBoundsWithCount);
        //truepagesize0RowBoundslimit=0?
        String pageSizeZero = properties.getProperty("pageSizeZero");
        this.pageSizeZero = Boolean.parseBoolean(pageSizeZero);
        //??true?????false??
        String reasonable = properties.getProperty("reasonable");
        this.reasonable = Boolean.parseBoolean(reasonable);
        //??????false
        String supportMethodsArguments = properties.getProperty("supportMethodsArguments");
        this.supportMethodsArguments = Boolean.parseBoolean(supportMethodsArguments);
        //offsetAsPageNum=false?
        //?
        PageObjectUtil.setParams(properties.getProperty("params"));
    }
}