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package com.feingto.cloud.kit.reflection;

import com.feingto.cloud.kit.DateKit;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.beanutils.converters.DateConverter;
import org.apache.commons.lang3.StringUtils;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.List;

/**
 * Bean属性转换工具类
 *
 * @author longfei
 */
@SuppressWarnings("unchecked")
public class ConvertKit {
    static {
        registerDateConverter();
    }

    /**
     * 提取集合中的对象的属性(通过getter函数), 组合成List.
     *
     * @param collection   来源集合.
     * @param propertyName 要提取的属性名.
     */
    public static List convertElementPropertyToList(final Collection collection, final String propertyName) {
        List list = new ArrayList();

        try {
            for (Object obj : collection) {
                list.add(PropertyUtils.getProperty(obj, propertyName));
            }
        } catch (Exception e) {
            throw ReflectionKit.convertReflectionExceptionToUnchecked(e);
        }

        return list;
    }

    /**
     * 提取集合中的对象的属性(通过getter函数), 组合成由分割符分隔的字符串.
     *
     * @param collection   来源集合.
     * @param propertyName 要提取的属性名.
     * @param separator    分隔符.
     */
    public static String convertElementPropertyToString(final Collection collection, final String propertyName, final String separator) {
        List list = convertElementPropertyToList(collection, propertyName);
        return StringUtils.join(list, separator);
    }

    /**
     * 转换字符串到相应类型.
     *
     * @param value  待转换的字符串.
     * @param toType 转换目标类型.
     */
    public static Object convertStringToObject(String value, Class toType) {
        try {
            return org.apache.commons.beanutils.ConvertUtils.convert(value, toType);
        } catch (Exception e) {
            throw ReflectionKit.convertReflectionExceptionToUnchecked(e);
        }
    }

    /**
     * 定义日期Converter的格式: yyyy-MM-dd 或 yyyy-MM-dd HH:mm:ss
     */
    private static void registerDateConverter() {
        DateConverter dc = new DateConverter();
        dc.setUseLocaleFormat(true);
        dc.setPatterns(new String[]{DateKit.DATE, DateKit.DATE_TIME});
        org.apache.commons.beanutils.ConvertUtils.register(dc, Date.class);
    }
}