Fixed occasional "NullPointerException" occurring when using the experiment engine

DavidBerdik · DavidBerdik · commit 1bc028c7a350 · 2019-04-14T17:55:07.000-04:00
diff --git a/src/com/jgaap/backend/ExperimentEngine.java b/src/com/jgaap/backend/ExperimentEngine.java
@@ -253,7 +253,7 @@ public String call() throws Exception {
 				Path filePath = FileSystems.getDefault().getPath(fileName);
 				Writer writer = Files.newBufferedWriter(filePath, Charset.defaultCharset(), StandardOpenOption.CREATE);
 				for (Document resultDocument : resultDocuments) {
-					if (!resultDocument.getFormattedResult(analysisDriver).equals("null"))
+					if (resultDocument.getFormattedResult(analysisDriver) != null && !resultDocument.getFormattedResult(analysisDriver).equals("null"))
 						writer.append(resultDocument.getFormattedResult(analysisDriver));
 				}
 				writer.close();

Original file line number	Diff line number	Diff line change
`@@ -253,7 +253,7 @@ public String call() throws Exception {`
`253`	`253`	`Path filePath = FileSystems.getDefault().getPath(fileName);`
`254`	`254`	`Writer writer = Files.newBufferedWriter(filePath, Charset.defaultCharset(), StandardOpenOption.CREATE);`
`255`	`255`	`for (Document resultDocument : resultDocuments) {`
`256`		`- if (!resultDocument.getFormattedResult(analysisDriver).equals("null"))`
	`256`	`+ if (resultDocument.getFormattedResult(analysisDriver) != null && !resultDocument.getFormattedResult(analysisDriver).equals("null"))`
`257`	`257`	`writer.append(resultDocument.getFormattedResult(analysisDriver));`
`258`	`258`	`}`
`259`	`259`	`writer.close();`