package cn.wisenergy.service.util;

import com.itextpdf.text.DocumentException;
import org.apache.poi.util.DocumentHelper;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import javax.management.Attribute;
import javax.swing.text.Document;
import javax.swing.text.Element;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.*;

public class MapToXmlUtils {
    /**
     * map 对象转换成 xml 字符串
     **//*
    public static String mapToXml(Map map) throws Exception{
        if (null == map) return null;
        System.out.println("转换前的Map对象数据：" + map.toString());
        StringBuffer sb = new StringBuffer();
        *//** 添加xml 的公共头信息 *//*
        sb.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
        mapToXmlHelp(map, sb);
        System.out.println("将map转成xml后的数据：" + sb.toString());
        return sb.toString();
    }

    *//**
     * 转换帮助方法
     **//*
    private static void mapToXmlHelp(Map map, StringBuffer str) throws Exception{
        Set set = map.keySet();
        *//** 遍历key *//*
        for (Iterator it = set.iterator(); it.hasNext();) {
            String key = (String) it.next();
            Object value = map.get(key);
            if (null == value)
                value = "";
            *//** 如果对象是集合 *//*
            if (value.getClass().getName().equals("java.util.ArrayList")) {
                ArrayList list = (ArrayList) map.get(key);
                str.append("<" + key + ">");
                for (int i = 0; i < list.size(); i++) {
                    HashMap hm = (HashMap) list.get(i);
                    mapToXmlHelp(hm, str);
                }
                str.append("</" + key + ">");
                *//** 如果该集合对象的长度只有1，那么默认重复添加集合下节点 *//*
                if (null !=list && !list.isEmpty() && list.size() <= 1) {
                    str.append("<" + key + ">");
                    for (int i = 0; i < list.size(); i++) {
                        HashMap hm = (HashMap) list.get(i);
                        mapToXmlHelp(hm, str);
                    }
                    str.append("</" + key + ">");
                }
                *//** 对象非集合时 *//*
            } else {
                if (value instanceof HashMap) {
                    str.append("<" + key + ">");
                    mapToXmlHelp((HashMap) value, str);
                    str.append("</" + key + ">");
                } else {
                    str.append("<" + key + ">" + value + "</" + key + ">");
                }
            }
        }
    }*/

        /**
         * XML格式字符串转换为Map
         *
         * @param strXML XML字符串
         * @return XML数据转换后的Map
         * @throws Exception
         */
        public static Map<String, String> xmlToMap(String strXML) throws Exception {
            try {
                Map<String, String> data = new HashMap<String, String>();
                DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
                DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
                InputStream stream = new ByteArrayInputStream(strXML.getBytes("UTF-8"));
                org.w3c.dom.Document doc = documentBuilder.parse(stream);
                doc.getDocumentElement().normalize();
                NodeList nodeList = doc.getDocumentElement().getChildNodes();
                for (int idx = 0; idx < nodeList.getLength(); ++idx) {
                    Node node = nodeList.item(idx);
                    if (node.getNodeType() == Node.ELEMENT_NODE) {
                        org.w3c.dom.Element element = (org.w3c.dom.Element) node;
                        data.put(element.getNodeName(), element.getTextContent());
                    }
                }
                try {
                    stream.close();
                } catch (Exception ex) {
                    // do nothing
                }
                return data;
            } catch (Exception ex) {
                throw ex;
            }

        }

        /**
         * 将Map转换为XML格式的字符串
         *
         * @param data Map类型数据
         * @return XML格式的字符串
         * @throws Exception
         */
        public static String mapToXml(Map<String, String> data) throws Exception {
            DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder documentBuilder= documentBuilderFactory.newDocumentBuilder();
            org.w3c.dom.Document document = documentBuilder.newDocument();
            org.w3c.dom.Element root = document.createElement("xml");
            document.appendChild(root);
            for (String key: data.keySet()) {
                String value = data.get(key);
                if (value == null) {
                    value = "";
                }
                value = value.trim();
                org.w3c.dom.Element filed = document.createElement(key);
                filed.appendChild(document.createTextNode(value));
                root.appendChild(filed);
            }
            TransformerFactory tf = TransformerFactory.newInstance();
            Transformer transformer = tf.newTransformer();
            DOMSource source = new DOMSource(document);
            transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
            StringWriter writer = new StringWriter();
            StreamResult result = new StreamResult(writer);
            transformer.transform(source, result);
            String output = writer.getBuffer().toString(); //.replaceAll("\n|\r", "");
            try {
                writer.close();
            }
            catch (Exception ex) {
            }
            return output;
        }
}