Fix for sharing models for older version. Closes eclipse-vorto#207

Signed-off-by: Nagavijay Sivakumar <[email protected]>

bundles/org.eclipse.vorto.repository/src/org/eclipse/vorto/repository/function/StringToUploadResult.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 Bosch Software Innovations GmbH and others.
+ * Copyright (c) 2015,2016 Bosch Software Innovations GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * and Eclipse Distribution License v1.0 which accompany this distribution.
@@ -22,6 +22,7 @@
 import com.google.common.base.Function;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
+import com.google.gson.JsonSyntaxException;
 
 public class StringToUploadResult implements Function<String, UploadResultView> {
 
@@ -30,7 +31,43 @@ public class StringToUploadResult implements Function<String, UploadResultView>
 	@Override
 	public UploadResultView apply(String input) {
 		List<UploadResultView> result = gson.fromJson(input, ServerResponseView.class).getObj();
+		//This is temporary fix to make it compatible with older interfaces
+		//This check would be removed on latest repository deployments.
+		if(result == null) {
+			return handlePreviousVersionUploadResult(input);
+		}
 		return result.get(0);
 	}
 
+	/**
+	 * Temporarily handle the Upload result to make it compatible 
+	 * with older interfaces.
+	 * @param input json string with older format
+	 * @return uploadresultview 
+	 */
+	private UploadResultView handlePreviousVersionUploadResult(String input) {
+		UploadResultView uploadResult = null;
+		try {
+			uploadResult = gson.fromJson(input, UploadResultView.class);
+			if (uploadResult != null) {
+				return uploadResult;
+			}
+		} catch (JsonSyntaxException e) {
+			e.printStackTrace();
+		}
+		return emptyUploadResult();
+	}
+
+
+	/**
+	 * Return empty error view incase of invalid json or null values.
+	 * @return Empty Upload result with error message.
+	 */
+	private UploadResultView emptyUploadResult() {
+		UploadResultView errorResult = new UploadResultView();
+		errorResult.setErrorMessage("Error while uploading to remote repository.");
+		errorResult.setValid(false);
+		return errorResult;
+	}
+
 }