CODEWITHSUNDEEP
javajax-rsapache-wink
Martin
Martin

Reputation: 1098

How to get query param as HashMap

I want to be able pass to my server a GET request suh as:

 http://example.com/?a[foo]=1&a[bar]=15&b=3

And when I get the query param 'a', it should be parsed as HashMap like so:

{'foo':1, 'bar':15}

EDIT: Ok, to be clear, here is what I am trying to do, but in Java, instead of PHP:

Pass array with keys via HTTP GET

Any ideas how to accomplish this?

Upvotes: 7

Views: 12807

Answers (3)

Kishor Raskar
Kishor Raskar

Reputation: 116

Alternatively if you are using HttpServletRequest then you can use getParameterMap() method which gives you all the parameters and its values as map.

e.g.

public void doGet(HttpServletRequest request, HttpServletResponse response)
              throws IOException {

   System.out.println("Parameters : \n"+request.getParameterMap()+"\n End");

}

Upvotes: 0

Tarlog
Tarlog

Reputation: 10154

There is no standard way to do that.

Wink supports javax.ws.rs.core.MultivaluedMap. So if you send something like http://example.com/?a=1&a=15&b=3 you will receive: key a values 1, 15; key b value 3.

If you need to parse something like ?a[1]=1&a[gv]=15&b=3 you need to take the javax.ws.rs.core.MultivaluedMap.entrySet() and perform an additional parsing of the keys.

Here's example of code you can use (didn't test it, so it may contain some minor errors):

String getArrayParameter(String key, String index,  MultivaluedMap<String, String> queryParameters) {
    for (Entry<String, List<String>> entry : queryParameters.entrySet()) {
        String qKey = entry.getKey();
        int a = qKey.indexOf('[');
        if (a < 0) {
            // not an array parameter
            continue;
        }
        int b = qKey.indexOf(']');
        if (b <= a) {
            // not an array parameter
            continue;
        }
        if (qKey.substring(0, a).equals(key)) {
            if (qKey.substring(a + 1, b).equals(index)) {
                return entry.getValue().get(0);
            }
        }
    }
    return null;
}

In your resource you should call it like this:

@GET
public void getResource(@Context UriInfo uriInfo) {
    MultivaluedMap<String, String> queryParameters = uriInfo.getQueryParameters();
    getArrayParameter("a", "foo", queryParameters);
}

Upvotes: 2

Kishor Raskar
Kishor Raskar

Reputation: 116

You can pass JSON Object as String by appending it to URL. But befor that you need to encode it you can use the method given in this link http://www.salesforce.com/us/developer/docs/apexcode/Content/apex_classes_restful_encodingUtil.htm for encoding and then just append the json object as any other string

Upvotes: 1

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