SuggestBox implementation

[Deepak Singh]

Hi,

I have thousands of key-value pairs in my database and i need to show the values in a suggestBox. 

when the suggestion is selected, i should be able to get the key of selected value.

I dont want to load all the data on client machine. So what could be the best possible way to implement it ?

Thanks
Deepak Singh

[Jens]

Create a small class that contains key/value and implements Suggestion and then create a custom SuggestOracle for your SuggestBox to fetch suggestions from your server based on the search string. 

-- J.

[Deepak Singh]

But after selecting a value, how do i get the id of the selected value?

On Sun, Aug 26, 2012 at 4:42 AM, Jens <jens.ne...@gmail.com> wrote:

Create a small class that contains key/value and implements Suggestion and then create a custom SuggestOracle for your SuggestBox to fetch suggestions from your server based on the search string. 

-- J.

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Deepak Singh

[Jens]

In your selection handler you have to cast the selected suggestion to your custom class.

-- J.

[Thomas Broyer]

On Sunday, August 26, 2012 6:36:11 PM UTC+2, Deepak Singh wrote:

But after selecting a value, how do i get the id of the selected value?

SuggestBox works best if you use the ID as the "replacementString" and the label as the "displayString" of the Suggestions in your SuggestOracle. In that case, you don't have to do anything, the ID will be set in the text box upon selecting a suggestion.

(e.g. the "replacement string" is an email address, and the display string also contains the full name, the oracle using both the full name and email address for providing suggestions)

[Deepak Singh]

Hi,

I tried this way

public class CustomSuggestion implements Suggestion{

public CityNameDTO dto = null;

public CustomSuggestion(CityNameDTO dto) {

this.dto = dto;

}

@Override

public String getDisplayString() {

return dto.getCityName();

}

@Override

public String getReplacementString() {

return dto.getCityId();

}

}

public class CustomSuggestOracle extends SuggestOracle{

List<CustomSuggestion> citySugggestions = null;

@Override

public void requestSuggestions(Request request, Callback callback) {

Response response  = new Response(getMatchingCities(request.getQuery(), request.getLimit()));

}

private List<CustomSuggestion> getMatchingCities(String query, int limit) {

List<CustomSuggestion> list = new ArrayList<CustomSuggestion>();

}

}

Now i am not able to understand how to go ahead with this customSuggestOracle.

Could you pls guide me here?

Thanks

Deepak

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Deepak Singh

[Ümit Seren]

It depends how you want to access your backend. Assuming you do a normal Ajax call you could do something like this:

private List<CustomSuggestion> getMatchingCities(String query, int limit) {

List<CustomSuggestion> list = new ArrayList<CustomSuggestion>();

        RequestBuilder request = new RequestBuilder(RequestBuilder.GET,url+"?query="+query+"&limit=" + limit);

request.setCallback(new RequestCallback() {

@Override

public void onResponseReceived(Request request, Response response) {

//parse the result (maybe JSON) and populate your ArrayList

}

@Override

public void onError(Request request, Throwable exception) {

// TODO Auto-generated method stub

}

});

try

{

request.send();

}

catch (Exception e) {

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Deepak Singh

[Deepak Singh]

I understand this. But my question is how do i implement CustomSuggestOracle.java

What will be implementation of the method getMatchingCities() in customSuggestionOracle ?

Thanks

Deepak 

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Deepak Singh

[Ümit Seren]

it depends how you access your backend? How do you transmit your DTO's
from the backend to the frontend?
Manually parsing JSON? RequestFactory? RPC?

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[Deepak Singh]

I would be using RPC and returning the List<DTO>.

Then how should i go ahead for implementation of CustomSuggestOracle ?

--
Deepak Singh

[Ümit Seren]

public class CustomSuggestOracle extends SuggestOracle{

List<CustomSuggestion> citySugggestions = null;

@Override
public void requestSuggestions(Request request, Callback callback) {

Response response = new
Response(getMatchingCities(request.getQuery(), request.getLimit()));

callback.onSuggestionsReady(request,response);

}

private List<CustomSuggestion> getMatchingCities(String query, int limit) {

List<CustomSuggestion> list = new ArrayList<CustomSuggestion>();

//get List of suggested from the backend with RPC

}
}

And when you create the SuggestBox you pass your CustomSuggestOracle
as a constructor parameter