Added Foursquare example

README.textile

@@ -30,8 +30,6 @@ h3. Supports all major OAuth APIs out-of-the-box
 
 * Twitter
 
-* Salesforce
-
 * Foursquare
 
 * and many more! check the "examples folder":http://github.com/fernandezpablo85/scribe-java/tree/master/src/test/java/org/scribe/examples

src/main/java/org/scribe/builder/api/FoursquareApi.java

@@ -5,12 +5,12 @@ public class FoursquareApi extends DefaultApi10a
   @Override
   public String getAccessTokenEndpoint()
   {
-    throw new UnsupportedOperationException();
+    return "http://foursquare.com/oauth/access_token";
   }
 
   @Override
   public String getRequestTokenEndpoint()
   {
-    throw new UnsupportedOperationException();
+    return "http://foursquare.com/oauth/request_token";
   }
 }

src/test/java/org/scribe/examples/FoursquareExample.java

@@ -0,0 +1,61 @@
+package org.scribe.examples;
+
+import java.util.Scanner;
+
+import org.scribe.builder.*;
+import org.scribe.builder.api.*;
+import org.scribe.model.*;
+import org.scribe.model.Request.*;
+import org.scribe.oauth.*;
+
+public class FoursquareExample
+{
+  private static final String AUTHORIZE_URL = "http://foursquare.com/oauth/authorize?oauth_token=";
+  private static final String PROTECTED_RESOURCE_URL = "http://api.foursquare.com/v1/user";
+  
+  public static void main(String[] args)
+  {
+    OAuthService service = new ServiceBuilder()
+                                .provider(FoursquareApi.class)
+                                .apiKey("FEGFXJUFANVVDHVSNUAMUKTTXCP1AJQD53E33XKJ44YP1S4I")
+                                .apiSecret("AYWKUL5SWPNC0CTQ202QXRUG2NLZYXMRA34ZSDW4AUYBG2RC")
+                                .build();
+    Scanner in = new Scanner(System.in);
+
+    System.out.println("=== Foursquare's OAuth Workflow ===");
+    System.out.println();
+
+    // Obtain the Request Token
+    System.out.println("Fetching the Request Token...");
+    Token requestToken = service.getRequestToken();
+    System.out.println("Got the Request Token!");
+    System.out.println();
+
+    System.out.println("Now go and authorize Scribe here:");
+    System.out.println(AUTHORIZE_URL + requestToken.getToken());
+    System.out.println("And paste the verifier here");
+    System.out.print(">>");
+    Verifier verifier = new Verifier(in.nextLine());
+    System.out.println();
+
+    // Trade the Request Token and Verfier for the Access Token
+    System.out.println("Trading the Request Token for an Access Token...");
+    Token accessToken = service.getAccessToken(requestToken, verifier);
+    System.out.println("Got the Access Token!");
+    System.out.println("(if your curious it looks like this: " + accessToken + " )");
+    System.out.println();
+
+    // Now let's go and ask for a protected resource!
+    System.out.println("Now we're going to access a protected resource...");
+    OAuthRequest request = new OAuthRequest(Verb.GET, PROTECTED_RESOURCE_URL);
+    service.signRequest(accessToken, request);
+    Response response = request.send();
+    System.out.println("Got it! Lets see what we found...");
+    System.out.println();
+    System.out.println(response.getBody());
+
+    System.out.println();
+    System.out.println("Thats it man! Go and build something awesome with Scribe! :)");
+  }
+
+}