Merge pull request #2343 from SiboVG/issue-2341

[#2341] Sanitize OBJ export groupnames

core/src/net/sf/openrocket/file/wavefrontobj/export/OBJExporterFactory.java

@@ -154,6 +154,7 @@ public class OBJExporterFactory {
 
             // Component exporting
             String groupName = idx + "_" + component.getName();
+            groupName = sanitizeGroupName(groupName);
             handleComponent(obj, this.configuration, this.options.getTransformer(), component, groupName,
                     materials.get(obj), this.options.getLOD(), options, warnings);
 
@@ -293,6 +294,20 @@ public class OBJExporterFactory {
         return sortedComponents;
     }
 
+    /**
+     * Sanitize the group name by replacing illegal characters with underscores.
+     * @param groupName the group name to sanitize
+     * @return the sanitized group name
+     */
+    private static String sanitizeGroupName(String groupName) {
+        Character c = FileUtils.getIllegalFilenameChar(groupName);
+        while (c != null) {
+            groupName = groupName.replace(c, '_');
+            c = FileUtils.getIllegalFilenameChar(groupName);
+        }
+        return groupName;
+    }
+
     private void addChildComponentToList(RocketComponent parent, Set<RocketComponent> components, Set<RocketComponent> sortedComponents) {
         for (RocketComponent child : parent.getChildren()) {
             if (components.contains(child)) {

core/src/net/sf/openrocket/util/FileUtils.java

@@ -9,9 +9,9 @@ import java.io.OutputStream;
 import java.nio.file.Paths;
 
 public abstract class FileUtils {
+	private static final char[] ILLEGAL_CHARS = new char[] { '/', '\\', ':', '*', '?', '"', '<', '>', '|' };
 
 	public static void copy(InputStream is, OutputStream os) throws IOException {
-		
 		if (!(os instanceof BufferedOutputStream)) {
 			os = new BufferedOutputStream(os);
 		}
@@ -30,9 +30,7 @@ public abstract class FileUtils {
 	}
 	
 	public static byte[] readBytes(InputStream is) throws IOException {
-
 		ByteArrayOutputStream bos = new ByteArrayOutputStream(1024);
-
 		copy(is, bos);
 
 		return bos.toByteArray();
@@ -61,4 +59,22 @@ public abstract class FileUtils {
 		return Paths.get(pathString).getFileName().toString();
 	}
 
+
+	/**
+	 * Returns an illegal character if one is found in the filename, otherwise returns null.
+	 * @param filename The filename to check
+	 * @return The illegal character, or null if none is found
+	 */
+	public static Character getIllegalFilenameChar(String filename) {
+		if (filename == null || filename.isEmpty()) {
+			return null;
+		}
+		for (char c : ILLEGAL_CHARS) {
+			if (filename.indexOf(c) >= 0) {
+				return c;
+			}
+		}
+		return null;
+	}
+
 }

swing/src/net/sf/openrocket/gui/widgets/SaveFileChooser.java

@@ -2,6 +2,7 @@ package net.sf.openrocket.gui.widgets;
 
 import net.sf.openrocket.l10n.Translator;
 import net.sf.openrocket.startup.Application;
+import net.sf.openrocket.util.FileUtils;
 
 import javax.swing.JFileChooser;
 import javax.swing.JOptionPane;
@@ -12,7 +13,6 @@ import java.util.regex.PatternSyntaxException;
 public class SaveFileChooser extends JFileChooser {
     private static final Translator trans = Application.getTranslator();
 
-    private static final char[] ILLEGAL_CHARS = new char[] { '/', '\\', ':', '*', '?', '"', '<', '>', '|' };
 
     private File cwd = null;
     private File currentFile = null;
@@ -30,7 +30,7 @@ public class SaveFileChooser extends JFileChooser {
         if (file.getParentFile() != getCurrentDirectory()) {
             cwd = getCurrentDirectory();
             fileName = getFilenameInput(currentFile, cwd);
-            if (getIllegalChar(fileName) != null) {
+            if (FileUtils.getIllegalFilenameChar(fileName) != null) {
                 return;
             }
         }
@@ -42,7 +42,7 @@ public class SaveFileChooser extends JFileChooser {
 
     @Override
     public void approveSelection() {
-        Character c = getIllegalChar(fileName);
+        Character c = FileUtils.getIllegalFilenameChar(fileName);
         if (c != null) {
             // Illegal character found
             JOptionPane.showMessageDialog(getParent(),
@@ -57,23 +57,6 @@ public class SaveFileChooser extends JFileChooser {
         }
     }
 
-    /**
-     * Returns an illegal character if one is found in the filename, otherwise returns null.
-     * @param filename The filename to check
-     * @return The illegal character, or null if none is found
-     */
-    private Character getIllegalChar(String filename) {
-        if (filename == null || filename.isEmpty()) {
-            return null;
-        }
-        for (char c : ILLEGAL_CHARS) {
-            if (filename.indexOf(c) >= 0) {
-                return c;
-            }
-        }
-        return null;
-    }
-
     /**
      * Returns the filename input by the user, or null if the filename is invalid.
      * You can't simply use getSelectedFile().getName() because it won't work for malformed filenames.