Bug 476272: Fix NullPointerException for not existing directories

An error message is written if the directories where the input is read from (for created the PNGs / for rendering galleries) do not exist.

Change-Id: I5981ee19fc3b772a8ff94faaa8413f1415272c03
Signed-off-by: Matthias Becker <ma.becker@sap.com>

2 files changed, 9 insertions, 0 deletions

diff --git a/org.eclipse.images.renderer/src/main/java/org/eclipse/images/renderer/GalleryMojo.java b/org.eclipse.images.renderer/src/main/java/org/eclipse/images/renderer/GalleryMojo.java
index 5e11854f..d778e5e0 100644
--- a/org.eclipse.images.renderer/src/main/java/org/eclipse/images/renderer/GalleryMojo.java
+++ b/org.eclipse.images.renderer/src/main/java/org/eclipse/images/renderer/GalleryMojo.java
@@ -78,6 +78,10 @@ public class GalleryMojo extends AbstractMojo {
         }
 
         File iconDirectoryRoot = new File(pngDir + "/");
+        if (!iconDirectoryRoot.exists()){
+            log.error("PNG directory' "+pngDir+"' does not exist.");
+            return;
+        }
 
         Map<String, List<IconEntry>> galleryIconSets = new HashMap<>();
 
diff --git a/org.eclipse.images.renderer/src/main/java/org/eclipse/images/renderer/RenderMojo.java b/org.eclipse.images.renderer/src/main/java/org/eclipse/images/renderer/RenderMojo.java
index ea3b6f54..b051d4be 100644
--- a/org.eclipse.images.renderer/src/main/java/org/eclipse/images/renderer/RenderMojo.java
+++ b/org.eclipse.images.renderer/src/main/java/org/eclipse/images/renderer/RenderMojo.java
@@ -558,6 +558,11 @@ public class RenderMojo extends AbstractMojo {
         File outputDir = new File(workingDirectory + (iconScale == 1 ? "/" + targetDir + "/" : "/" + targetDir + "-highdpi/"));
         File iconDirectoryRoot = new File(sourceDir + "/");
 
+        if (!iconDirectoryRoot.exists()){
+            log.error("Source directory' "+sourceDir+"' does not exist.");
+            return;
+        }
+
         // Search each subdir in the root dir for svg icons
         for (File file : iconDirectoryRoot.listFiles()) {
             if(!file.isDirectory()) {