Merge pull request #26 from maxxedev/string-comparison

use .equals to compare strings

Author: thinkingserious

.gitignore

@@ -22,6 +22,7 @@ repo/
 /.settings/
 /.classpath
 /.project
+/bin
 
 # Environment files
-.env/*.*
+.env/*.*

src/main/java/com/sendgrid/Client.java

@@ -10,6 +10,7 @@
 import java.util.Map;
 
 import org.apache.http.Header;
+import org.apache.http.HttpMessage;
 import org.apache.http.annotation.NotThreadSafe;
 import org.apache.http.client.ClientProtocolException;
 import org.apache.http.client.ResponseHandler;
@@ -201,9 +202,7 @@ public Response post(Request request) throws URISyntaxException, IOException {
 		}
 
 		httpPost.setEntity(new StringEntity(request.getBody(), Charset.forName("UTF-8")));
-		if (request.getBody() != "") {
-			httpPost.setHeader("Content-Type", "application/json");
-		}
+		writeContentTypeIfNeeded(request, httpPost);
 
 		return executeApiCall(httpPost);
 	}
@@ -230,9 +229,8 @@ public Response patch(Request request) throws URISyntaxException, IOException {
 		}
 
 		httpPatch.setEntity(new StringEntity(request.getBody(), Charset.forName("UTF-8")));
-		if (request.getBody() != "") {
-			httpPatch.setHeader("Content-Type", "application/json");
-		}
+		writeContentTypeIfNeeded(request, httpPatch);
+
 		return executeApiCall(httpPatch);
 	}
 
@@ -258,9 +256,7 @@ public Response put(Request request) throws URISyntaxException, IOException {
 		}
 
 		httpPut.setEntity(new StringEntity(request.getBody(), Charset.forName("UTF-8")));
-		if (request.getBody() != "") {
-			httpPut.setHeader("Content-Type", "application/json");
-		}
+		writeContentTypeIfNeeded(request, httpPut);
 
 		return executeApiCall(httpPut);
 	}
@@ -286,13 +282,17 @@ public Response delete(Request request) throws URISyntaxException, IOException {
 		}
 
 		httpDelete.setEntity(new StringEntity(request.getBody(), Charset.forName("UTF-8")));
-		if (request.getBody() != "") {
-			httpDelete.setHeader("Content-Type", "application/json");
-		}
+		writeContentTypeIfNeeded(request, httpDelete);
 
 		return executeApiCall(httpDelete);
 	}
 
+	private void writeContentTypeIfNeeded(Request request, HttpMessage httpMessage) {
+		if (!"".equals(request.getBody())) {
+			httpMessage.setHeader("Content-Type", "application/json");
+		}
+	}
+
 	private Response executeApiCall(HttpRequestBase httpPost) throws IOException {
 		try {
 			CloseableHttpResponse serverResponse = httpClient.execute(httpPost);