用xml建立仓库的逻辑层的操作

package com.repositoryclient.xml;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.StringBufferInputStream;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import com.repositoryclient.treeview.FileNode;

public class RepositoryConstructionOption {
    //-------------------------------------------------------------------------------------

    private DocumentBuilderFactory factory;
    private Element node;
    private Element model;
    private DocumentBuilder documentBuilder;
    private Document document;
    private String filePath="./xml/Test1.xml";
    private String nodeType="Node";
    private String modelType="Model";
    private List wishList=new ArrayList<>();
    private StringBufferInputStream inputStream;
    private String xmlFileContent;
    //-------------------------------------------------------------------------------------

    public RepositoryConstructionOption(String xmlFileContent){
        this.xmlFileContent=xmlFileContent;
        setUpDomFactory();
    }
    
    private void setUpDomFactory(){
    factory=DocumentBuilderFactory.newInstance();
    try{
        inputStream=new StringBufferInputStream(xmlFileContent);
        factory.setIgnoringElementContentWhitespace(true);
        documentBuilder=factory.newDocumentBuilder();
        document=documentBuilder.parse(inputStream);    
        
    }catch(Exception e){
        e.printStackTrace();
    }
    }
    //-----------------------------------------------------------------------------------
    public void addNode(String targetNodePath,String newNodeName){
        Element newChild=document.createElement(newNodeName);
        newChild.setTextContent("\n");
        newChild.setAttribute("type", "Node");
        newChild.setAttribute("NodeName", newNodeName);
        newChild.setAttribute("NodePath", targetNodePath);
        newChild.setAttribute("NodeAuther", "Administrator");
        newChild.setAttribute("NodeSize", String.valueOf(0));
        SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd");
        newChild.setAttribute("CreateData", date.format(new Date()));
        Element targetElement=(Element) selectSingleNode(targetNodePath, document);
        targetElement.appendChild(newChild);
        saveXml("./xml/Test1.xml", document);
    }
    public void deleteNode(String targetNodePath){
        Element targetElement=(Element) selectSingleNode(targetNodePath, document);
        targetElement.getParentNode().removeChild(targetElement);
        
        saveXml("./xml/Test1.xml", document);
    }
    public void renameNode(String targetNodePath,String newNodeName){
        Node targetNode=selectSingleNode(targetNodePath, document);
        document.renameNode(targetNode, null, newNodeName);
        saveXml("./xml/Test1.xml", document);
    }
    //-------------------------------------------------------------------------------------
    
    public void addModel(String targetNodePath,FileNode newModel,String[] Tags){
        Element newChild=document.createElement(newModel.getFileName());
        
        //设置Model的属性信息
        newChild.setAttribute("type", "Model");
        newChild.setAttribute("NodeName", newModel.getFileName());
        newChild.setAttribute("NodePath", newModel.getPath());
        newChild.setAttribute("NodeAuther", newModel.getAuthor());
        newChild.setAttribute("NodeSize", String.valueOf(newModel.getSize()));
        SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd");
        newChild.setAttribute("CreateData", date.format(newModel.getDate()));

        //设置Model的Tag(标签)，以后可能会添加通过Tag搜索的功能时会用到
        newChild.setAttribute("Tag0", Tags[0]);
        newChild.setAttribute("Tag1", Tags[1]);
        newChild.setAttribute("Tag2", Tags[2]);
        
        newChild.setNodeValue("Model");
        Element targetElement=(Element) selectSingleNode(targetNodePath, document);
        //添加Model到xml
        targetElement.appendChild(newChild);
        saveXml("./xml/Test1.xml", document);
    }
    public void deleteModel(String modelName){
        Element targetElement=(Element) selectSingleNode(modelName, document);
        targetElement.getParentNode().removeChild(targetElement);
        
        saveXml("./xml/Test1.xml", document);
    }
    //-------------------------------------------------------------------------------------
    public List getTheTree(String rootNodeName){
        List resultList=new ArrayList();
        Element targetNode=(Element) document.getElementsByTagName(rootNodeName).item(0);
        FileNode fatherNode=new FileNode("root", "Repository", 0, "Administrator", 0, new Date(), null, "Node");
        searchTheTree(targetNode,fatherNode);
        resultList.add(fatherNode);
        
        return resultList;
        
    }
    public void searchTheTree(Node rootNode,FileNode fatherNode){
        try {
        List childList=new ArrayList();
        Node node;
        NodeList childNodesList=rootNode.getChildNodes();
        for(int i=0;i<childNodesList.getLength();i++){
            node=childNodesList.item(i);
            if(node.getNodeName()!="#text"){
            //System.out.println("here:    "+node.getAttributes().item(0));
                NamedNodeMap nodeMap=node.getAttributes();
                if(nodeMap.getNamedItem("type").getNodeValue().equals(nodeType)){
                    //String property[]=new String[8];
                    String property[]=handleModelProperty(node);
                    SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd");
                    FileNode subNode;
                    
                        subNode = new FileNode(property[0], property[1], 0, property[2], Long.valueOf(property[3]),date.parse(property[4]) , null, "Node");
                    
                    searchTheTree(node, subNode);
                    childList.add(subNode);
                }else{
                    //String property[]=new String[8];
                    String property[]=handleModelProperty(node);
                    SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd");
                    FileNode subNode=new FileNode(property[0], property[1], 0, property[2], Long.valueOf(property[3]),date.parse(property[4]) , null, "Model");
                    childList.add(subNode);
                }
            }
        }
        fatherNode.setChildren(childList);
    }
        catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (NumberFormatException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 
    }
    public String[] handleModelProperty(Node node){
        String modelProperty[] = new String[8];;
        NamedNodeMap nodeMap=node.getAttributes();
        //System.out.println(nodeMap.getNamedItem("NodeName").getNodeValue());
        modelProperty[0]=nodeMap.getNamedItem("NodeName").getNodeValue();
        modelProperty[1]=nodeMap.getNamedItem("NodePath").getNodeValue();
        modelProperty[2]=nodeMap.getNamedItem("NodeAuther").getNodeValue();
        modelProperty[3]=nodeMap.getNamedItem("NodeSize").getNodeValue();
        modelProperty[4]=nodeMap.getNamedItem("CreateData").getNodeValue();
    if(nodeMap.getNamedItem("type").getNodeValue().equals(modelType))
    {
        modelProperty[5]=nodeMap.getNamedItem("Tag0").getNodeValue();
        modelProperty[6]=nodeMap.getNamedItem("Tag1").getNodeValue();
        modelProperty[7]=nodeMap.getNamedItem("Tag2").getNodeValue();
    }
        return modelProperty;
        
    }
    public List searchModelByKeyWords(String rootNodeName,String keywords){
        Element targetNode=(Element) document.getElementsByTagName(rootNodeName).item(0);
        wishList.clear();
        getTheList(targetNode,0,keywords);
        
        return wishList;
    }
    
    public List getUsersOwnedFiles(String rootNodeName,String author){
        Element targetNode=(Element) document.getElementsByTagName(rootNodeName).item(0);
        wishList.clear();
        getTheList(targetNode,-1,author);
        
        return wishList;
        
    }
    /**
     * 
     * @param rootNode
     * @param key  (-1:getUsersOwnedFiles 0:searchModelByKeyWords)
     */
    public void getTheList(Node rootNode,int key,String requirement){
        try{
        Node node;
        NodeList childNodesList=rootNode.getChildNodes();
        for(int i=0;i<childNodesList.getLength();i++){
            node=childNodesList.item(i);
            if(node.getNodeName()!="#text"){
                NamedNodeMap nodeMap=node.getAttributes();
                if(nodeMap.getNamedItem("type").getNodeValue().equals(nodeType)){
                    getTheList(node, key,requirement);
                }else{
                    String property[]=handleModelProperty(node);
                    SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd");
                    FileNode subNode=new FileNode(property[0], property[1], 0, property[2], Long.valueOf(property[3]),date.parse(property[4]) , null, "Model");
                    switch (key) {
                    case -1://getUsersOwnedFiles
                        if(requirement.equals(subNode.getAuthor())){
                            wishList.add(subNode);
                        }
                        break;

                    default://searchModelByKeyWords
                        if(requirement.contains(property[5]) || requirement.contains(property[6]) || requirement.contains(property[7]) || property[5].contains(requirement) || property[6].contains(requirement) || property[7].contains(requirement)){
                            wishList.add(subNode);
                        }
                        break;
                    }
                }
            }
        }
        }catch(Exception e){
            e.printStackTrace();
        }
    }
    //-------------------------------------------------------------------------------------
    public void saveXml(String fileName, Document doc) {//将Document输出到文件
        TransformerFactory transFactory=TransformerFactory.newInstance();
        try {
            Transformer transformer = transFactory.newTransformer();
            transformer.setOutputProperty("indent", "yes");

            DOMSource source=new DOMSource();
            source.setNode(doc);
            StreamResult result=new StreamResult();
            result.setOutputStream(new FileOutputStream(fileName));
            
            transformer.transform(source, result);
        } catch (TransformerConfigurationException e) {
            e.printStackTrace();
        } catch (TransformerException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }   
    }
    public Node selectSingleNode(String express, Object source) {//查找节点，并返回第一个符合条件节点
        Node result=null;
        XPathFactory xpathFactory=XPathFactory.newInstance();
        XPath xpath=xpathFactory.newXPath();
        try {
            result=(Node) xpath.evaluate(express, source, XPathConstants.NODE);
        } catch (XPathExpressionException e) {
            e.printStackTrace();
        }
        
        return result;
    }
    //-------------------------------------------------------------------------------------

}