com.abssh.util.Page.java Source code

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Here is the source code for com.abssh.util.Page.java

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/**
 * Copyright (c) 2010 www.pub.cn
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * 
 * $Id: Page.java,v 1.4 2010/08/22 07:10:35 xp Exp $
 */
package com.abssh.util;

import java.io.Serializable;
import java.util.Collections;
import java.util.List;

import org.apache.commons.lang.StringUtils;

/**
 * ORM???. ???1. pageSize=0?
 * 
 * @param <T>
 *            Page.
 * @author pub
 */
public class Page<T> implements Serializable {

    private static final long serialVersionUID = 7489398000885811711L;

    public static final String ASC = "asc";
    public static final String DESC = "desc";
    public static final int DEFAILT_PAGE_SIZE = 10;
    /** ? */

    private int pageNo = 1; // ??1?
    private int pageSize = DEFAILT_PAGE_SIZE; // ? 0-?
    private String orderBy = null; // ??
    private String order = null; // ?(ascdesc)?
    private boolean autoCount = true;// ????true
    private String searchParam_h;
    private String searchValue;
    private String searchName;

    private List<T> result = Collections.emptyList();// 
    private long totalCount = -1;

    /**
     * Page(10)
     */
    public Page() {
        this.pageSize = DEFAILT_PAGE_SIZE;
    }

    /**
     * Page
     * 
     * @param pageSize
     *            ?
     */
    public Page(final int pageSize) {
        setPageSize(pageSize);// 0-???
    }

    /**
     * Page
     * 
     * @param pageSize
     *            ?
     * @param autoCount
     *            ??
     */
    public Page(final int pageSize, final boolean autoCount) {
        setPageSize(pageSize);// 0-???
        setAutoCount(autoCount);
    }

    // -- ? --//
    /**
     * ??,??1,1.
     */
    public int getPageNo() {
        return pageNo;
    }

    /**
     * ??,??1,11.
     */
    public void setPageNo(final Long pageNo) {
        if (pageNo == null || pageNo.intValue() < 1) {
            this.pageNo = 1;
        } else {
            this.pageNo = pageNo.intValue();
        }
    }

    /**
     * ??.
     */
    public int getPageSize() {
        return pageSize;
    }

    /**
     * ??,11.
     */
    public void setPageSize(final int pageSize) {
        if (pageSize >= 0) {
            this.pageSize = pageSize;
        } else {
            this.pageSize = 0;
        }
    }

    /**
     * ?pageNopageSize???,??1.
     */
    public int getFirst() {
        return ((pageNo - 1) * pageSize) + 1;
    }

    /**
     * ?,.?','.
     */
    public String getOrderBy() {
        return orderBy;
    }

    /**
     * ?,?','.
     */
    public void setOrderBy(final String orderBy) {
        this.orderBy = orderBy;
    }

    /**
     * ??,.
     */
    public boolean isOrderBySetted() {
        return (StringUtils.isNotBlank(orderBy) && StringUtils.isNotBlank(order));
    }

    /**
     * ??.
     */
    public String getOrder() {
        return order;
    }

    /**
     * ???.
     * 
     * @param order
     *            ?descasc,?','.
     */
    public void setOrder(final String order) {
        // order?
        if (order == null) {
            return;
        }
        String[] orders = StringUtils.split(StringUtils.lowerCase(order), ',');
        for (String orderStr : orders) {
            if (!StringUtils.equals(DESC, orderStr) && !StringUtils.equals(ASC, orderStr)) {
                throw new IllegalArgumentException("??" + orderStr + "??");
            }
        }

        this.order = StringUtils.lowerCase(order);
    }

    /**
     * ??count?, false.
     */
    public boolean isAutoCount() {
        return autoCount;
    }

    /**
     * ??count?.
     */
    public void setAutoCount(final boolean autoCount) {
        this.autoCount = autoCount;
    }

    // --  --//

    /**
     * ?.
     */
    public List<T> getResult() {
        return result;
    }

    /**
     * .
     */
    public void setResult(final List<T> result) {
        this.result = result;
    }

    /**
     * ?, -1.
     */
    public long getTotalCount() {
        return totalCount;
    }

    /**
     * .
     */
    public void setTotalCount(final long totalCount) {
        this.totalCount = totalCount;
    }

    /**
     * ?pageSizetotalCount, -1.
     */
    public long getTotalPages() {
        if (pageSize <= 0 || totalCount < 0) {
            return -1;
        }
        long count = totalCount / pageSize;
        if (totalCount % pageSize > 0) {
            count++;
        }
        return count;
    }

    /**
     * ?.
     */
    public boolean isHasNext() {
        return (pageNo + 1 <= getTotalPages());
    }

    /**
     * ??, ??1. ????.
     */
    public int getNextPage() {
        if (isHasNext()) {
            return pageNo + 1;
        } else {
            return pageNo;
        }
    }

    /**
     * ?.
     */
    public boolean isHasPre() {
        return (pageNo - 1 >= 1);
    }

    /**
     * ??, ??1. ???.
     */
    public int getPrePage() {
        if (isHasPre()) {
            return pageNo - 1;
        } else {
            return pageNo;
        }
    }

    public String getSearchParam_h() {
        return searchParam_h;
    }

    public void setSearchParam_h(String searchParam_h) {
        this.searchParam_h = searchParam_h;
    }

    public String getSearchValue() {
        return searchValue;
    }

    public void setSearchValue(String searchValue) {
        this.searchValue = searchValue;
    }

    public String getSearchName() {
        return searchName;
    }

    public void setSearchName(String searchName) {
        this.searchName = searchName;
    }

}