Can someone please help on how this can be implemented using JSOUP. I am trying to know the position of src="images/myimage.png" in their respective tr tag as I plan to put this in DB.
Sample html tag
I have a basic code to traverse the elements
public static void main(String[] args) throws Exception {
Document doc = Jsoup.connect("dummy.html").get();
for (Element body : html_data.getElementsByTag("body")) {
System.out.println(body.toString());
}
}
for(Element body:rfs_table.getElementsByTag("tbody")) {
Elements tr =body.getElementsByTag("tr");
for(int x=0;x<tr.size();x++) {
Element row = tr.get(x);
Elements cols = row.select("td");
int c=0;
for(Element a:cols) {
if(a.hasClass("tbl1")) {
System.out.println(a.toString() + "with image");
}else {
System.out.println(a.toString() + c);
}
c++;
}
}
This is the solution I was able to come up with.
Related
I have problem with select 2. It dont show all Items, but only subset. I dont see on Select2Choice any method, which show all items. Can someone give me a poit how to show whole items.
Here is code:
originStationDropDown = new Select2Choice<>("originDgfStation", new PropertyModel<Station>(this, "originStation") , new StationsProvider(originCountryDD, productDD));
ComponentHelper.addLabelAndComponent(originStationDropDown, this, "originStation.label", ComponentOptions.REQUIRED);
private class StationsProvider extends ChoiceProvider<Station> {
private Select2Choice<Country> countryDD;
private DropDownChoice<Product> productDD;
public StationsProvider(Select2Choice<Country> countryDD, DropDownChoice<Product> productDD) {
this.countryDD = countryDD;
this.productDD = productDD;
}
#Override
public void query(String codeNameFragment, int i, Response<Station> response) {
if(codeNameFragment == null || "".equals(codeNameFragment)) {
List<Station> stations = stationDao.findByCountryAndProduct(countryDD.getModel().getObject(), productDD.getModel().getObject(), "code");
for(Station station : stations) {
response.add(station);
}
} else {
response.addAll(stationDao.findByCountryAndProductAndFragment(countryDD.getModel().getObject(), productDD.getModel().getObject(), codeNameFragment));
}
System.out.println(response.size());
}
#Override
public void toJson(Station station, JSONWriter jsonWriter) throws JSONException {
jsonWriter.key("id").value(station.getId()).key("text").value(station.getNameWithCode());
}
#Override
public Collection<Station> toChoices(Collection<String> collection) {
List<Station> stations = new ArrayList<>();
List<Station> stationList = stationDao.findAll();
for(String id : collection) {
for(Station station : stationList) {
if(station.getId().equals(Long.valueOf(id))) {
stations.add(station);
}
}
}
return stations;
}
}
You don't explain which items are shown and which are not.
I will guess that only the first N items are always shown. The second parameter of #query() method is int page (named i in your code). This parameter should be used to paginate the results. I.e. you should not always return 10000 items and let the JavaScript to deal with them but you have to return 0-20, 21-40, 41-60, etc.
I have trouble getting data here from database there isn't data,
Data is not displayed outside of the method.
Could you please help me?
List<Person> Refresh() {
Person p = new Person();
ParseQuery <ParseObject> query = ParseQuery.getQuery(NAME_DATABASE);
query.findInBackground(new FindCallback<ParseObject>() {
public void done(List<ParseObject> scoreList , ParseException e) {
if (e == null) {
for (int i = 0; i < scoreList.size(); i++){
p.setId(scoreList.get(i).getInt(Key.ID));
p.setName(scoreList.get(i).getString(Key.NAME));
p.setAge(scoreList.get(i).getString(Key.AGE)); p.setDate_start(scoreList.get(i).getString(Key.DATE_START));
p.setMonth_number(scoreList.get(i).getString(Key.MONTH_NUMBER));
p.setPropriety(scoreList.get(i).getString(Key.PROPRIETY));
p.setPrice(scoreList.get(i).getString(Key.PRICE));
p.setGender(scoreList.get(i).getString(Key.GENDER));
persons.add(p); //there is find data
}
}
else {
Log.d("score", "Error: " + e.getMessage());
}
}
});
return persons; //here there isn't data (size=0)
}
The answer is simple really. You are returning persons outside the findInBackground() method.
else{
Log.d("score", "Error: " + e.getMessage());
}
//Return here after the else statement
return persons;
}
Note : you might want to make persons a global variable or else android studio will tell you to declare it as a final variable.
I am working on a project which deal with heavy data sets. I am using Primefaces 4 & 5, spring and hibernate. I have to to display a very huge datasets such as min 3000 rows with 100 columns with various features such as sorting, filtering, row-expansion etc. My problem is, my applications took 8 to 10 mins to show the whole page as well as other functionalities(sorting, filtering ) also takes a lot time. My client is not happy at all. However I can use pagination for this but again My client do not want paging. So I decided to use livescroll but unfortunately I failed to implement livescroll with lazyload or without lazyload as there were bugs in PF regarding livescroll. also i have posted this question here earlier but no solution found.
This performance issue is very critical and show stopper for me. To show 3000 rows with 100 columns, the size of the page which is getting loaded is ~10MB.
I have calculated the time consumed by various life-cycles of of JSF, using Phase-listener I figure out that its Browser who is taking time to parse the response rendered by jsf. To complete the all phases my application took only 25 sec.
At minimal I want to increase the performance of my project. Please share any idea, suggestion and anything which could help to overcome this problem
Note: There is no database manipulations in getters and setters as well as no complex business logic.
UPDATE :
This is my datatable without lazyload:
<p:dataTable
style="width:100%"
id="cdTable"
selection="#{controller.selectedArray}"
resizableColumns="true"
draggableColumns="true"
var="cd"
value="#{controller.cdDataModel}"
editable="true"
editMode="cell"
selectionMode="multiple"
rowSelectMode="add"
scrollable="true"
scrollHeight="650"
rowKey="#{cd.id}"
rowIndexVar="rowIndex"
styleClass="screenScrollStyle"
liveScroll="true"
scrollRows="50"
filterEvent="enter"
widgetVar="dt4"
>
Here everything is working except filtering. Once I filter then first page is displayed but unable to sort or livescroll on datatable. Note this I have tested in Primefaces5.
2nd Approch
With lazyload with same datatable
1) When I add rows="100" livescroll happens but problem with row-editing, row-expansion but filter & sorting works.
2) When I remove rows livescroll works with row-editing, row-expansion etc but filter & sorting dont work.
My LazyLoadModel is as follows
public class MyDataModel extends LazyDataModel<YData>
{
#Override
public List<YData> load(int first, int pageSize,
List<SortMeta> multiSortMeta, Map<String, Object> filters) {
System.out.println("multisort wala load");
return super.load(first, pageSize, multiSortMeta, filters);
}
/**
*
*/
private static final long serialVersionUID = 1L;
private List<YData> datasource;
public YieldRecBondDataModel() {
}
public YieldRecBondDataModel(List<YData> datasource) {
this.datasource = datasource;
}
#Override
public YData getRowData(String rowKey) {
// In a real app, a more efficient way like a query by rowKey should be
// implemented to deal with huge data
// List<YData> yList = (List<YData>) getWrappedData();
for (YData y : datasource)
{
System.out.println("datasource :"+datasource.size());
if(y.getId()!=null)
{
if (y.getId()==(new Long(rowKey)))
{
return y;
}
}
}
return null;
}
#Override
public Object getRowKey(YData y) {
return y.getId();
}
#Override
public void setRowIndex(int rowIndex) {
/*
* The following is in ancestor (LazyDataModel):
* this.rowIndex = rowIndex == -1 ? rowIndex : (rowIndex % pageSize);
*/
if (rowIndex == -1 || getPageSize() == 0) {
super.setRowIndex(-1);
}
else
super.setRowIndex(rowIndex % getPageSize());
}
#Override
public List<YData> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String,Object> filters) {
List<YData> data = new ArrayList<YData>();
System.out.println("sort order : "+sortOrder);
//filter
for(YData yInfo : datasource) {
boolean match = true;
for(Iterator<String> it = filters.keySet().iterator(); it.hasNext();) {
try {
String filterProperty = it.next();
String filterValue = String.valueOf(filters.get(filterProperty));
Field yField = yInfo.getClass().getDeclaredField(filterProperty);
yField.setAccessible(true);
String fieldValue = String.valueOf(yField.get(yInfo));
if(filterValue == null || fieldValue.startsWith(filterValue)) {
match = true;
}
else {
match = false;
break;
}
} catch(Exception e) {
e.printStackTrace();
match = false;
}
}
if(match) {
data.add(yInfo);
}
}
//sort
if(sortField != null) {
Collections.sort(data, new LazySorter(sortField, sortOrder));
}
int dataSize = data.size();
this.setRowCount(dataSize);
//paginate
if(dataSize > pageSize) {
try {
List<YData> subList = data.subList(first, first + pageSize);
return subList;
}
catch(IndexOutOfBoundsException e) {
return data.subList(first, first + (dataSize % pageSize));
}
}
else
return data;
}
#Override
public int getRowCount() {
// TODO Auto-generated method stub
return super.getRowCount();
}
}
I am fade up with these issues and becomes show stopper for me. Even i tried Primefaces 5
If your data is loaded from db i suggest you to do a better LazyDataModel like:
public class ElementiLazyDataModel extends LazyDataModel<T> implements Serializable {
private Service<T> abstractFacade;
public ElementiLazyDataModel(Service<T> abstractFacade) {
this.abstractFacade = abstractFacade;
}
public Service<T> getAbstractFacade() {
return abstractFacade;
}
public void setAbstractFacade(Service<T> abstractFacade) {
this.abstractFacade = abstractFacade;
}
#Override
public List<T> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String, Object> filters) {
PaginatedResult<T> pr = abstractFacade.findRange(new int[]{first, first + pageSize}, sortField, sortOrder, filters);
setRowCount(new Long(pr.getTotalItems()).intValue());
return pr.getItems();
}
}
The service is some kind of backend communication (like an EJB) injected in the ManagedBean that use this model.
The service for pagination may be like this:
#Override
public PaginatedResult<T> findRange(int[] range, String sortField, SortOrder sortOrder, Map<String, Object> filters) {
final Query query = getEntityManager().createQuery("select x from " + entityClass.getSimpleName() + " x")
.setFirstResult(range[0]).setMaxResults(range[1] - range[0] + 1);
// Add filter sort etc.
final Query queryCount = getEntityManager().createQuery("select count(x) from " + entityClass.getSimpleName() + " x");
// Add filter sort etc.
Long rowCount = (Long) queryCount.getSingleResult();
List<T> resultList = query.getResultList();
return new PaginatedResult<T>(resultList, rowCount);
}
Note that you have to do the paginated query (with jpa like this the orm do the query for you, but if you don't use orm have to do paginated query, for oracle look at TOP-N query, for example: http://oracle-base.com/articles/misc/top-n-queries.php)
Remember your return obj must be contains also the total record as a fast count:
public class PaginatedResult<T> implements Serializable {
private List<T> items;
private long totalItems;
public PaginatedResult() {
}
public PaginatedResult(List<T> items, long totalItems) {
this.items = items;
this.totalItems = totalItems;
}
public List<T> getItems() {
return items;
}
public void setItems(List<T> items) {
this.items = items;
}
public long getTotalItems() {
return totalItems;
}
public void setTotalItems(long totalItems) {
this.totalItems = totalItems;
}
}
All this is useful if your database table is correctly setup, pay aptention to the execution plan of the possible query and add the right index.
Hope to give some hint to improve you performance
In the end, remember to your final user that the human eyes can't see more that 10-20 record at once, so it is very useless to have thousand record in a page.
You have used the default load implementation which is used in the showcases of Primefaces. This is not the correct implementation for your case where you load your data from a database.
The load method should use the correct query with consideration of :
1) the filter fields that are used, example:
String query = "select e from Entity e where lower(e.f1) like lower('" + filters.get(key) + "'%) and..., etc. for the other fields
2) the sorting columns that are used, example:
query.append("order by ").append(sortField).append(" ").append(SortOrder.ASCENDING.name() ? "" : sortOrder.substring(0, 4)),..., etc. for the other columns.
3) The total count of your query WITH 1) attached to it. Example:
Long totalCount = (Long) entityManager.createQuery("select count(*) from Entity e where lower(e.f1) like lower('filterKey1%') and lower(e.f2) like lower('filterKey2%') ...").getSingleResult();
I'm trying to write a piece of code that will take an ANTLR4 parser and use it to generate ASTs for inputs similar to the ones given by the -tree option on grun (misc.TestRig). However, I'd additionally like for the output to include all the line number/offset information.
For example, instead of printing
(add (int 5) '+' (int 6))
I'd like to get
(add (int 5 [line 3, offset 6:7]) '+' (int 6 [line 3, offset 8:9]) [line 3, offset 5:10])
Or something similar.
There aren't a tremendous number of visitor examples for ANTLR4 yet, but I am pretty sure I can do most of this by copying the default implementation for toStringTree (used by grun). However, I do not see any information about the line numbers or offsets.
I expected to be able to write super simple code like this:
String visit(ParseTree t) {
return "(" + t.productionName + t.visitChildren() + t.lineNumber + ")";
}
but it doesn't seem to be this simple. I'm guessing I should be able to get line number information from the parser, but I haven't figured out how to do so. How can I grab this line number/offset information in my traversal?
To fill in the few blanks in the solution below, I used:
List<String> ruleNames = Arrays.asList(parser.getRuleNames());
parser.setBuildParseTree(true);
ParserRuleContext prc = parser.program();
ParseTree tree = prc;
to get the tree and the ruleNames. program is the name for the top production in my grammar.
The Trees.toStringTree method can be implemented using a ParseTreeListener. The following listener produces exactly the same output as Trees.toStringTree.
public class TreePrinterListener implements ParseTreeListener {
private final List<String> ruleNames;
private final StringBuilder builder = new StringBuilder();
public TreePrinterListener(Parser parser) {
this.ruleNames = Arrays.asList(parser.getRuleNames());
}
public TreePrinterListener(List<String> ruleNames) {
this.ruleNames = ruleNames;
}
#Override
public void visitTerminal(TerminalNode node) {
if (builder.length() > 0) {
builder.append(' ');
}
builder.append(Utils.escapeWhitespace(Trees.getNodeText(node, ruleNames), false));
}
#Override
public void visitErrorNode(ErrorNode node) {
if (builder.length() > 0) {
builder.append(' ');
}
builder.append(Utils.escapeWhitespace(Trees.getNodeText(node, ruleNames), false));
}
#Override
public void enterEveryRule(ParserRuleContext ctx) {
if (builder.length() > 0) {
builder.append(' ');
}
if (ctx.getChildCount() > 0) {
builder.append('(');
}
int ruleIndex = ctx.getRuleIndex();
String ruleName;
if (ruleIndex >= 0 && ruleIndex < ruleNames.size()) {
ruleName = ruleNames.get(ruleIndex);
}
else {
ruleName = Integer.toString(ruleIndex);
}
builder.append(ruleName);
}
#Override
public void exitEveryRule(ParserRuleContext ctx) {
if (ctx.getChildCount() > 0) {
builder.append(')');
}
}
#Override
public String toString() {
return builder.toString();
}
}
The class can be used as follows:
List<String> ruleNames = ...;
ParseTree tree = ...;
TreePrinterListener listener = new TreePrinterListener(ruleNames);
ParseTreeWalker.DEFAULT.walk(listener, tree);
String formatted = listener.toString();
The class can be modified to produce the information in your output by updating the exitEveryRule method:
#Override
public void exitEveryRule(ParserRuleContext ctx) {
if (ctx.getChildCount() > 0) {
Token positionToken = ctx.getStart();
if (positionToken != null) {
builder.append(" [line ");
builder.append(positionToken.getLine());
builder.append(", offset ");
builder.append(positionToken.getStartIndex());
builder.append(':');
builder.append(positionToken.getStopIndex());
builder.append("])");
}
else {
builder.append(')');
}
}
}
I'm having trouble to handle KeyboardEvents on DartFlash.
I don't know what I'm doing wrong here. Could someone help me?
My intention is to just create a very simple walking character and every time I hit a key, it moves in the x and y, only to start understanding DartFlash API.
Here is the full source code:
class Character extends Sprite
{
TextureAtlas _atlas;
Bitmap _currentBitmap;
int _direction;
String _name;
Character(this._name, this._atlas)
{
this._direction=Direction.down;
this._currentBitmap=this.getBitmap("stand", this._direction);
addChild(this._currentBitmap);
}
String get name => this._name;
Bitmap getBitmap(String name, [int direction, int number])
{
if(direction == null)
{
return new Bitmap(this._atlas.getBitmapData(name));
} else if (number == null)
{
return new Bitmap(this._atlas.getBitmapData("${name}-${Direction.getDirectionName(direction)}"));
}
return new Bitmap(this._atlas.getBitmapData("${name}-${Direction.getDirectionName(direction)}-${number}"));
}
}
Character dk;
void keyboardListener(KeyboardEvent ke) {
print("Key code: ${ke.keyCode}");
dk.x+=1;
dk.y+=1;
}
void main()
{
Stage mainStage = new Stage("mainStage", html.document.query("#mainStage"));
RenderLoop renderLoop = new RenderLoop();
renderLoop.addStage(mainStage);
Resource resource=new Resource();
resource.addTextureAtlas("DarkKnight", "resources/DarkKnight.json", TextureAtlasFormat.JSONARRAY);
resource.load().then((res)
{
print(resource.toString());
dk=new Character("DarkKnight", resource.getTextureAtlas("DarkKnight"));
dk.x=10;
dk.y=10;
mainStage.addChild(dk);
dk.addEventListener(KeyboardEvent.KEY_DOWN, keyboardListener, false);
mainStage.focus=dk;
print("${mainStage.focus.name}");
});
}
There is an easy workaround. Just add an "tabindex" attribute to the canvas element and afterwards you will received KeyboardEvents. If the "tabindex" is not set, then the canvas does not receive keyboard events.
<canvas id="stage" width="800" height="600" tabindex="1"></canvas>
The canvas also needs the focus. You can get the focus by clicking on the canvas or problematically set the focus:
query('#stage').focus();