0
我想要獲得我的產品的排序列表。 該列表應該按位於PafElement類中的屬性postition進行排序。它是一個整數。 我開始在方法「getSortedList」 中對產品列表進行排序我已經用四個對象測試了該方法。對象1和2被切換。這意味着對象一位於HashMap中的位置2處，對象二位於位置一處。其他物體都很好。當值爲對象時，按屬性對hashMap進行排序
顯然，HashMap並沒有在地圖的末尾添加新的元素。我想知道，如果有可能實現這一點。
public Product(){}
public Product(Init activity){
final Init init = activity;
Log.i("PRODUCT","Costruct");
// TODO: 12.02.2017 use own logger class
TextView productName = (TextView)activity.findViewById(R.id.productName);
TextView.OnEditorActionListener listener = new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (event != null) {
if (event.getKeyCode() == KeyEvent.KEYCODE_ENTER && event.getAction() == KeyEvent.ACTION_DOWN) {
Long milis = System.currentTimeMillis();
setId(milis);
setName(v.getText().toString());
setPosition(getNextPosition());
create(init);
v.setText("");
v.setVisibility(View.GONE);
// TODO: 08.02.2017 log successful creation;
return true;
}
}
return false;
}
};
productName.setOnEditorActionListener(listener);
productName.setVisibility(View.VISIBLE);
}
public static void toList(Product p){
productList.put(p.getId(),p);
}
public static void initialise(Element products){
NodeList productList = products.getChildNodes();
for(int i = 0; i < productList.getLength(); i++){
Node product = productList.item(i);
if(product.getNodeName().equals("product")) {
Element productElement = (Element) product;
String id = productElement.getAttribute("productId");
Integer pos = Integer.parseInt(productElement.getAttribute("position"));
String name = productElement.getElementsByTagName("name").item(0).getTextContent();
Product p = new Product();
p.setName(name);
p.setId(Long.parseLong(id));
p.setPosition(pos);
updatePosition(pos);
Product.toList(p);
}
}
}
public static HashMap<String,Product> getList(){
return productList;
}
public static HashMap<String,Product> getSortedList(){
HashMap<String,Product> productList = Product.getList();
HashMap<String,Product> sortedList = new HashMap<String, Product>();
int[] positions = new int[productList.size()];
int i = 0;
for(String id :productList.keySet()){
Product p = productList.get(id);
positions[i] = p.getPosition();
i++;
}
Arrays.sort(positions);
while(sortedList.size() < productList.size()) {
for (Integer position : positions) {
for (String id : productList.keySet()){
Product p = productList.get(id);
if (p.getPosition().equals(position)) {
sortedList.put(id, p);
}
}
}
}
return sortedList;
}
public static Product[] getListAsArray(){
Product[] p = new Product[productList.size()];
int i = 0;
for(Product product : productList.values()){
p[i] = product;
i++;
}
return p;
}
private void create(Init init){
try {
DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
domFactory.setIgnoringComments(true);
DocumentBuilder builder = domFactory.newDocumentBuilder();
Document store = builder.parse(new File(init.PATH));
Element pl = store.getElementById("productList");
Element product = store.createElement("product");
Text name = store.createTextNode(this.name);
Text id = store.createTextNode(this.id + "");
Element productName = store.createElement("name");
productName.appendChild(name);
product.setAttribute("productId",(this.id + ""));
product.setIdAttribute("productId",true);
product.setAttribute("position",this.position + "");
product.appendChild(productName);
pl.appendChild(product);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer t = tf.newTransformer();
t.setOutputProperty(OutputKeys.INDENT, "yes");
t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
DOMSource domSource = new DOMSource(store);
StreamResult sr = new StreamResult(new File(init.PATH));
t.transform(domSource,sr);
Log.i("PRODUCT","created");
Product.toList(this);
/**
* @Important the string in index of has to be the same as one of the headres in class Init.java
* */
init.getListAdapter().update("PafElements",this.getName());
}catch(ParserConfigurationException | TransformerException | SAXException | IOException e){
e.printStackTrace();
// TODO: 08.02.2017 use own logger class
}
}
private static void updatePosition(Integer current){
if(maxPostition != null) {
if (current > maxPostition) {
maxPostition = current;
}
}else{
maxPostition = current;
}
}
private static Integer getNextPosition(){
Integer pos = maxPostition;
if(pos == null){
pos = 1;
}else{
pos += 1;
}
maxPostition = pos;
return pos;
}