com.afeng.common.dao.orm.HibernateWebUtils.java Source code

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Here is the source code for com.afeng.common.dao.orm.HibernateWebUtils.java

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/**
 *  Copyright (c) 2012-2014 http://www.eryansky.com
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 */
package com.afeng.common.dao.orm;

import org.apache.commons.beanutils.PropertyUtils;
import org.springframework.util.Assert;
import org.springframework.web.util.WebUtils;

import com.afeng.common.dao.orm.PropertyFilter;
import com.afeng.common.utils.StringUtils;
import com.afeng.common.utils.SysConstants;
import com.afeng.common.utils.reflection.ReflectionUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.*;

/**
 * HibernateWeb.
 * @author &Eryan eryanwcp@gmail.com
 * @date 2013-3-21 ?12:30:01 
 *
 */
public class HibernateWebUtils {

    public static final String FILTERPREFIX = "filter_";
    private static Properties sqlfilterProperties;

    static {
        sqlfilterProperties = SysConstants.getSqlfilter().getProperties();
    }

    private HibernateWebUtils() {
    }

    /**
     * ?ID?,???.
     * <p/>
     * ????"id".
     *
     * @see #mergeByCheckedIds(java.util.Collection, java.util.Collection, Class, String)
     */
    public static <T, ID> void mergeByCheckedIds(final Collection<T> srcObjects, final Collection<ID> checkedIds,
            final Class<T> clazz) {
        mergeByCheckedIds(srcObjects, checkedIds, clazz, "id");
    }

    /**
     * ?ID?,???.
     * <p/>
     * ??????id,??????id?????.
     * ???id??,??id??.
     * ?ID, ??cascade-save-or-update.
     *
     * @param srcObjects ??,.
     * @param checkedIds ?,ID.
     * @param clazz      ?
     * @param idName     ??
     */
    public static <T, ID> void mergeByCheckedIds(final Collection<T> srcObjects, final Collection<ID> checkedIds,
            final Class<T> clazz, final String idName) {

        //?
        Assert.notNull(srcObjects, "scrObjects?");
        Assert.hasText(idName, "idName?");
        Assert.notNull(clazz, "clazz?");

        //?,???.
        if (checkedIds == null) {
            srcObjects.clear();
            return;
        }

        //????,id?ID?,.
        //?,???id,?id???id.
        Iterator<T> srcIterator = srcObjects.iterator();
        try {

            while (srcIterator.hasNext()) {
                T element = srcIterator.next();
                Object id;
                id = PropertyUtils.getProperty(element, idName);

                if (!checkedIds.contains(id)) {
                    srcIterator.remove();
                } else {
                    checkedIds.remove(id);
                }
            }

            //ID??id????,,id??.
            for (ID id : checkedIds) {
                T obj = clazz.newInstance();
                PropertyUtils.setProperty(obj, idName, id);
                srcObjects.add(obj);
            }
        } catch (Exception e) {
            throw ReflectionUtils.convertReflectionExceptionToUnchecked(e);
        }
    }

    /**
     * ?PropertyFilter??Request?,PropertyFilter.
     * Filter???filter_.
     *
     * @see #buildPropertyFilters(HttpServletRequest, String)
     */
    public static List<PropertyFilter> buildPropertyFilters(final HttpServletRequest request) {
        return buildPropertyFilters(request, FILTERPREFIX);
    }

    /**
     * ?PropertyFilter??Request?,PropertyFilter.
     * PropertyFilter??Filter?__??.
     * <p/>
     * eg.
     * filter_EQS_name
     * filter_LIKES_name_OR_email
     */
    public static List<PropertyFilter> buildPropertyFilters(final HttpServletRequest request,
            final String filterPrefix) {
        return HibernateWebUtils.buildPropertyFilters(request, FILTERPREFIX, true);
    }

    /**
     * ?PropertyFilter??Request?,PropertyFilter.
     * PropertyFilter??Filter?__??.
     * <p/>
     * eg.
     * filter_EQS_name
     * filter_LIKES_name_OR_email
     */
    public static List<PropertyFilter> buildPropertyFilters(final HttpServletRequest request,
            final String filterPrefix, boolean filterSQL) {
        List<PropertyFilter> filterList = new ArrayList<PropertyFilter>();

        //request??????,?????Map.
        Map<String, Object> filterParamMap = WebUtils.getParametersStartingWith(request, filterPrefix);

        //??Map,PropertyFilter
        for (Map.Entry<String, Object> entry : filterParamMap.entrySet()) {
            String filterName = entry.getKey();
            String value = (String) entry.getValue();

            //value,filter.
            if (StringUtils.isNotEmpty(value)) {
                if (filterSQL) {
                    for (Object oj : sqlfilterProperties.keySet()) {
                        String key = (String) oj;
                        value = value.replaceAll(key, sqlfilterProperties.getProperty(key));
                    }
                }
                PropertyFilter filter = new PropertyFilter(filterName.replaceAll("__", "."), value);
                filterList.add(filter);
            }
        }
        return filterList;
    }
}