From b62754e52ccb1c52bff10e055cc06660e489cdab Mon Sep 17 00:00:00 2001
From: Bengt Martensson <barf@bengt-martensson.de>
Date: Sat, 4 Nov 2023 12:21:00 +0100
Subject: [PATCH] Export signal: check savefile for null-ness. Resolves #506.

---
 .../exporter/DynamicRemoteSetExportFormat.java      |  3 ++-
 .../irscrutinizer/exporter/Exporter.java            |  3 ++-
 .../irscrutinizer/exporter/TextExporter.java        | 13 +++++++------
 3 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/src/main/java/org/harctoolbox/irscrutinizer/exporter/DynamicRemoteSetExportFormat.java b/src/main/java/org/harctoolbox/irscrutinizer/exporter/DynamicRemoteSetExportFormat.java
index 378d9993..829d9404 100644
--- a/src/main/java/org/harctoolbox/irscrutinizer/exporter/DynamicRemoteSetExportFormat.java
+++ b/src/main/java/org/harctoolbox/irscrutinizer/exporter/DynamicRemoteSetExportFormat.java
@@ -203,7 +203,8 @@ protected void possiblyMakeExecutable(File file) {
 
     @Override
     public void export(RemoteSet remoteSet, String title, File saveFile, String encoding) throws IOException, TransformerException {
-        export(remoteSet, title, saveFile.getCanonicalPath(), encoding);
+        if (saveFile != null)
+            export(remoteSet, title, saveFile.getCanonicalPath(), encoding);
     }
 
     private void export(RemoteSet remoteSet, String title, String fileName, String encoding) throws IOException, TransformerException {
diff --git a/src/main/java/org/harctoolbox/irscrutinizer/exporter/Exporter.java b/src/main/java/org/harctoolbox/irscrutinizer/exporter/Exporter.java
index bfa020e4..329ad034 100644
--- a/src/main/java/org/harctoolbox/irscrutinizer/exporter/Exporter.java
+++ b/src/main/java/org/harctoolbox/irscrutinizer/exporter/Exporter.java
@@ -201,7 +201,8 @@ public boolean considersRepetitions() {
     }
 
     public void export(Document document, File file, String charsetName) throws FileNotFoundException, UnsupportedEncodingException {
-        XmlUtils.printDOM(file, document, charsetName, null);
+        if (file != null)
+            XmlUtils.printDOM(file, document, charsetName, null);
     }
 
     public void export(String payload, File file, String charsetName) throws FileNotFoundException, UnsupportedEncodingException {
diff --git a/src/main/java/org/harctoolbox/irscrutinizer/exporter/TextExporter.java b/src/main/java/org/harctoolbox/irscrutinizer/exporter/TextExporter.java
index 20264822..4501e58c 100644
--- a/src/main/java/org/harctoolbox/irscrutinizer/exporter/TextExporter.java
+++ b/src/main/java/org/harctoolbox/irscrutinizer/exporter/TextExporter.java
@@ -78,12 +78,13 @@ public boolean supportsEmbeddedFormats() {
     @Override
     public void export(RemoteSet remoteSet, String title, File file, String charsetName)
             throws IOException, GirrException, IrCoreException, IrpException {
-        try (PrintStream printStream = new PrintStream(file, charsetName)) {
-            for (Remote remote : remoteSet)
-                for (CommandSet commandSet : remote)
-                    for (Command command : commandSet)
-                        printStream.println(formatCommand(command, 1));
-        }
+        if (file != null)
+            try (PrintStream printStream = new PrintStream(file, charsetName)) {
+                for (Remote remote : remoteSet)
+                    for (CommandSet commandSet : remote)
+                        for (Command command : commandSet)
+                            printStream.println(formatCommand(command, 1));
+            }
     }
 
     private String formatCommand(Command command, int count) throws GirrException, IrpException, IrCoreException {