I want to create a pagination helper. The only parameters that it needs are currentpage, pagecount and routename.
However, I do not know if it is possible to use the return value of another html helper inside the definition of my html helper. I am referring specifically to Html.RouteLink. How can I go about doing something like this in the class definition
using System;
using System.Web.Mvc;
namespace MvcApplication1.Helpers
{
public static class LabelExtensions
{
public static string Label(this HtmlHelper helper, string routeName, int currentpage, int totalPages)
{
string html = "";
//Stuff I add to html
//I'd like to generate a similar result as the helper bellow.
//This code does not work, it's just an example of what I'm trying to accomplish
html .= Html.RouteLink( pageNo, routeName, new { page = pageNo - 1 } );
//Other stuff I do the html
return html;
}
}
}
Thank you.
Generally, yes you can use the results of other Html Helper functions within your custom functions. The exception would be any that write directly to the response stream rather than returning a string value.
I've done this sort of thing several times myself, and it works just fine...here's a sample I just totally made up right now based on something I did that I don't have the code for handy right now:
public static string RssFeed(this HtmlHelper helper, string url)
{
StringBuilder sb = new StringBuilder();
sb.Append(GetRSSMarkup(url)); // This generates the markup for the feed data
sb.Append(helper.ActionLink("Go Home","Index","Home"));
return sb.ToString();
}
Related
I am using Activities and Places.
I have a LoginPlace.
The url displayed when I navigate to that place has this at the end:
#LoginPlace:login
How can I change this to just #login or something else?
My tokenizer looks like this:
public class LoginTokenizer implements PlaceTokenizer<LoginPlace> {
private LoginPlace loginPlace;
public LoginTokenizer() {
}
#Override
public LoginPlace getPlace(String token) {
return new LoginPlace(token);
}
#Override
public String getToken(LoginPlace place) {
loginPlace = place;
return loginPlace.getLoginToken();
}
}
And navigation to the LoginPlace is done through the PlaceController:
clientFactory.getPlaceController().goTo(new LoginPlace("login"));
Where can I manipulate the format of the URL?
The mapping is done by the PlaceHistoryMapper.
You can have an implementation generated by GWT based in PlaceTokenizers, but then it's based on a prefix/suffix. The #Prefix allows you configure the prefix (which otherwise defaults to the place class' name).
Or you can implement the interface yourself and have complete control over the process.
Rename the Place class from LoginPlace to Login.
Pass an empty token:
new LoginPlace("")
In AEM, content such as pages and images contains the '/content/' prefix in them. We are able to rewrite these url via Link Checker Transformer configuration and resourceResolver.map() method. URLs are being rewritten for HTML elements <a> and <form>.
But I want it to work for <img> elements as well.
I tried including the <img> elements to the Link Checker Transformer configuration by adding it to the 'Rewrite Elements' list as img:src:
I also checked the answers from What am I missing for this CQ5/AEM URL rewriting scenario? but both attempts didn't work for this issue.
Is there any way to do this?
Even if the rewriter and Link Checker Transformer didn't work. I used a custom LinkRewriter by using the Transformer and TransformerFactory interfaces. I based on the sample from Adobe for my code. I worked out something like this:
#Component(
metatype = true,
label = "Image Link Rewriter",
description = "Maps the <img> elements src attributes"
)
#Service(value = TransformerFactory.class)
#Property(value = "global", propertyPrivate = true)
public class ImageLinkRewriter implements Transformer, TransformerFactory {
// some variables
public CustomLinkTransformer() { }
#Override
public void init(ProcessingContext context,
ProcessingComponentConfiguration config) throws IOException {
// initializations here
}
#Override
public final Transformer createTransformer() {
return new CustomLinkTransformer();
}
#Override
public void startElement(String uri, String localName,
String qName, Attributes atts) throws SAXException {
if ("img".equalsIgnoreCase(localName)) {
contentHandler.startElement(uri, localName, qName, rewriteImageLink(atts));
}
}
private Attributes rewriteImageLink(Attributes attrs) {
String attrName = "src";
AttributesImpl result = new AttributesImpl(attrs);
String link = attrs.getValue(attrName);
String mappedLink = resource.getResourceResolver().map(request, link);
result.setValue(result.getIndex(attrName), mappedLink);
return result;
}
}
Hope this helps others. Here are a few references:
TransformerFactory interface
Transformer interface
Adobe
I use junit to assert the existing of wicket components:
wicketTester.assertComponent("dev1WicketId:dev2WicketId:formWicketId", Form.class);
This works for some forms. For complex structure, it is defficult to find out the path of the form by searching all html files. Is there any method how to find out the path easy?
If you have the component you can call #getPageRelativePath(). E.g.
// Supposing c is a component that has been added to the page.
// Returns the full path to the component relative to the page, e.g., "path:to:label"
String pathToComponent = c.getPageRelativePath();
You can get the children of a markup container by using the visitChildren() method. The following example shows how to get all the Forms from a page.
List<Form> list = new ArrayList<Form<?>>();
Page page = wicketTester.getLastRenderedPage();
for (Form form : page.visitChildren(Form.class)) {
list.add(form);
}
An easy way to get those is to call getDebugSettings().setOutputComponentPath(true); when initializing your application. This will make Wicket to output these paths to the generated HTML as an attribute on every component-bound tag.
It's recommended to only enable this on debug mode, though:
public class WicketApplication extends WebApplication {
#Override
public void init() {
super.init();
if (getConfigurationType() == RuntimeConfigurationType.DEVELOPMENT) {
getDebugSettings().setOutputComponentPath(true);
}
}
}
Extending the RJo's answer.
It seems that the method page.visitChildren(<Class>) is deprecated (Wicket 6), so with an IVisitor it can be :
protected String findPathComponentOnLastRenderedPage(final String idComponent) {
final Page page = wicketTester.getLastRenderedPage();
return page.visitChildren(Component.class, new IVisitor<Component, String>() {
#Override
public void component(final Component component, final IVisit<String> visit) {
if (component.getId().equals(idComponent)) {
visit.stop(component.getPageRelativePath());
}
}
});
}
I'm creating a small REST web service using Netbeans. This is my code:
private UriInfo context;
private String name;
public GenericResource() {
}
#GET
#Produces("text/html")
public String getHtml() {
//TODO return proper representation object
return "Hello "+ name;
}
#PUT
#Consumes("text/html")
public void putHtml(String name) {
this.name = name;
}
I'm calling the get method ok since when I call http://localhost:8080/RestWebApp/resources/greeting I get "Hello null" but I'm trying to pass a parameter using http://localhost:8080/RestWebApp/resources/greeting?name=Krt_Malta but the PUT method is not being called... Is this the correct way to pass a parameter or am I missing something?
I'm a newbie to Rest bdw, so sry if it's a simple question.
Thanks! :)
Krt_Malta
The second URL is a plain GET request. To pass data to a PUT request you have to pass it using a form. The URL is reserved for GET as far as I know.
If you build the HTTP-header yourself, you must use POST instead of GET:
GET /RestWebApp/resources/greeting?name=Krt_Malta HTTP/1.0
versus
POST /RestWebApp/resources/greeting?name=Krt_Malta HTTP/1.0
If you use a HTML-form, you must set the method-attribute to "PUT":
<form action="/RestWebApp/resources/greeting" method="PUT">
For JAX-RS to mactch a method annotated with #PUT, you need to submit a PUT request. Normal browsers don't do this but cURL or a HTTP client library can be used.
To map a query parameter to a method argument, JAX-RS provides the #QueryParam annotation.
public void putWithQueryParam(#QueryParam("name") String name) {
// do something
}
You can set:
#PUT
#path{/putHtm}
#Consumes("text/html")
public void putHtml(String name) {
this.name = name;
}
and if you use something like google`s Volley library you can do.
GsonRequest<String> asdf = new GsonRequest<String>(ConnectionProperties.happyhourURL + "/putHtm", String.class, yourString!!, true,
new Response.Listener<Chain>() {
#Override
public void onResponse(Chain response) {
}
}, new CustomErrorListener(this));
MyApplication.getInstance().addToRequestQueue(asdf);
and GsonRequest will look like:
public GsonRequest(String url, Class<T> _clazz, T object, boolean needLogin, Listener<T> successListener, Response.ErrorListener errorlistener) {
super(Method.PUT, url, errorlistener);
_headers = new HashMap<String, String>();
this._clazz = _clazz;
this.successListener = successListener;
this.needsLogin = needLogin;
_object = object;
setTimeout();
}
I'd like to do this the right way if possible. I have XML data as follows:
<?xml version="1.0" encoding="utf-8"?>
<XnaContent>
<Asset Type="PG2.Dictionary">
<Letters TotalInstances="460100">
<Letter Count="34481">a</Letter>
...
<Letter Count="1361">z</Letter>
</Letters>
<Words Count="60516">
<Word>aardvark</Word>
...
<Word>zebra</Word>
</Words>
</Asset>
</XnaContent>
and I'd like to load this in (using Content.Load< Dictionary >) into one of these
namespace PG2
{
public class Dictionary
{
public class Letters
{
public int totalInstances;
public List<Character> characters;
public class Character
{
public int count;
public char character;
}
}
public class Words
{
public int count;
public HashSet<string> words;
}
Letters letters;
Words words;
}
}
Can anyone help with either instructions or pointers to tutorials? I've found a few which come close but things seem to have changed slightly between 3.1 and 4.0 in ways which I don't understand and a lot of the documentation assumes knowledge I don't have. My understanding so far is that I need to make the Dictionary class Serializable but I can't seem to make that happen. I've added the XML file to the content project but how do I get it to create the correct XNB file?
Thanks!
Charlie.
This may help Link. I found it useful to work the other way round to check that my xml data was correctly defined. Instantate your dictionary class set all the fields then serialize it to xml using a XmlSerializer to check the output.
You need to implement a ContentTypeSerializer for your Dictionary class. Put this in a content extension library and add a reference to the content extension library to your content project. Put your Dictionary class into a game library that is reference by both your game and the content extension project.
See:
http://blogs.msdn.com/b/shawnhar/archive/2008/08/26/customizing-intermediateserializer-part-2.aspx
Here is a quick ContentTypeSerializer I wrote that will deserialize your Dictionary class. It could use better error handling.
using System;
using System.Collections.Generic;
using System.Xml;
using Microsoft.Xna.Framework.Content.Pipeline.Serialization.Intermediate;
namespace PG2
{
[ContentTypeSerializer]
class DictionaryXmlSerializer : ContentTypeSerializer<Dictionary>
{
private void ReadToNextElement(XmlReader reader)
{
reader.Read();
while (reader.NodeType != System.Xml.XmlNodeType.Element)
{
if (!reader.Read())
{
return;
}
}
}
private void ReadToEndElement(XmlReader reader)
{
reader.Read();
while (reader.NodeType != System.Xml.XmlNodeType.EndElement)
{
reader.Read();
}
}
private int ReadAttributeInt(XmlReader reader, string attributeName)
{
reader.MoveToAttribute(attributeName);
return int.Parse(reader.Value);
}
protected override Dictionary Deserialize(IntermediateReader input, Microsoft.Xna.Framework.Content.ContentSerializerAttribute format, Dictionary existingInstance)
{
Dictionary dictionary = new Dictionary();
dictionary.letters = new Dictionary.Letters();
dictionary.letters.characters = new List<Dictionary.Letters.Character>();
dictionary.words = new Dictionary.Words();
dictionary.words.words = new HashSet<string>();
ReadToNextElement(input.Xml);
dictionary.letters.totalInstances = ReadAttributeInt(input.Xml, "TotalInstances");
ReadToNextElement(input.Xml);
while (input.Xml.Name == "Letter")
{
Dictionary.Letters.Character character = new Dictionary.Letters.Character();
character.count = ReadAttributeInt(input.Xml, "Count");
input.Xml.Read();
character.character = input.Xml.Value[0];
dictionary.letters.characters.Add(character);
ReadToNextElement(input.Xml);
}
dictionary.words.count = ReadAttributeInt(input.Xml, "Count");
for (int i = 0; i < dictionary.words.count; i++)
{
ReadToNextElement(input.Xml);
input.Xml.Read();
dictionary.words.words.Add(input.Xml.Value);
ReadToEndElement(input.Xml);
}
ReadToEndElement(input.Xml); // read to the end of words
ReadToEndElement(input.Xml); // read to the end of asset
return dictionary;
}
protected override void Serialize(IntermediateWriter output, Dictionary value, Microsoft.Xna.Framework.Content.ContentSerializerAttribute format)
{
throw new NotImplementedException();
}
}
}