Added a simple darft for Wikidata APi requests

Task: #9

src/main/java/net/sourceforge/jwbf/mediawiki/ApiRequestBuilder.java

@@ -14,8 +14,17 @@ public ApiRequestBuilder action(String action) {
     return this;
   }
 
+  /**
+   * @deprecated use json instead (you have to change response handling)
+   */
+  @Deprecated
   public ApiRequestBuilder formatXml() {
     param("format", "xml");
     return this;
   }
+
+  public ApiRequestBuilder formatJson() {
+    param("format", "json");
+    return this;
+  }
 }

src/test/java/net/sourceforge/jwbf/mediawiki/wikidata/WikiDataTest.java

@@ -0,0 +1,66 @@
+package net.sourceforge.jwbf.mediawiki.wikidata;
+
+import static org.junit.Assert.assertEquals;
+import net.sourceforge.jwbf.TestHelper;
+import net.sourceforge.jwbf.core.actions.Get;
+import net.sourceforge.jwbf.core.actions.util.HttpAction;
+import net.sourceforge.jwbf.mediawiki.ApiRequestBuilder;
+import net.sourceforge.jwbf.mediawiki.actions.util.MWAction;
+import net.sourceforge.jwbf.mediawiki.bots.MediaWikiBot;
+
+import org.junit.Test;
+
+public class WikiDataTest {
+
+  @Test
+  public void test() {
+    // GIVEN
+    // TODO do not work with a live system
+    String wikidataApiLiveUrl = "https://www.wikidata.org/w/api.php";
+    TestHelper.assumeReachable(wikidataApiLiveUrl); // will skip the test if not
+    MediaWikiBot bot = new MediaWikiBot(wikidataApiLiveUrl);
+
+    // WHEN
+    GetClaims getClaims = new GetClaims(bot, "Q4115189");
+    bot.performAction(getClaims);
+
+    // THEN
+    // TODO better assertions
+    assertEquals("{\"claims\":", getClaims.getResult().substring(0, 10));
+  }
+
+  // TODO extract to file
+  // TODO what is a claim?
+  private static class GetClaims extends MWAction {
+
+    private final Get buildGet;
+    private String result = "";
+
+    public GetClaims(MediaWikiBot bot, String entity) {
+      buildGet = new ApiRequestBuilder() //
+          .action("wbgetclaims") //
+          .formatJson() //
+          .param("entity", entity) //
+          .buildGet();
+
+    }
+
+    @Override
+    public String processAllReturningText(String text) {
+      result = text;
+      return "doNotCallThis";
+    }
+
+    // TODO this have to be a complex type, not a string
+    public String getResult() {
+      return result;
+    }
+
+    @Override
+    public HttpAction getNextMessage() {
+      return buildGet;
+    }
+
+  }
+
+}