Move getParentUrl() to static util class

src/main/java/de/tudresden/inf/mci/brailleplot/configparser/ConfigurationParser.java

@@ -173,7 +173,7 @@ public abstract class ConfigurationParser {
         mLogger.debug("Starting parsing properties file from java resources: \"{}\"", resource);
 
         try {
-            parseConfigFile(resource.openStream(), getParentUrl(resource), assertCompleteness);
+            parseConfigFile(resource.openStream(), UrlHelper.getParentUrl(resource), assertCompleteness);
         } catch (IOException e) {
             throw new ConfigurationParsingException("Could not open resource at \"" + resource.toString() + "\"", e);
         }
@@ -212,7 +212,7 @@ public abstract class ConfigurationParser {
         // reset internal property buffer
         mPrinterProperties.clear();
         mFormatProperties.clear();
-        mValidator.setSearchPath(getPath(path));
+        mValidator.setSearchPath(getPathNoFilePrefix(path));
         // load and parse file
         parse(config, path);
         // build printer object from added properties
@@ -241,29 +241,13 @@ public abstract class ConfigurationParser {
         }
     }
 
-    /**
-     * Returns the URL to the parent directory of a File / Resource.
-     * @param resourcePath The URL to analyze.
-     * @return The URL to the parent directory of the specified URL.
-     * @throws ConfigurationParsingException if the generated URL is not a valid URL.
-     */
-    private static URL getParentUrl(final URL resourcePath) throws ConfigurationParsingException {
-        String fileString = resourcePath.getPath();
-        String parentString = fileString.substring(0, fileString.lastIndexOf("/"));
-        try {
-            return new URL(resourcePath.getProtocol(), resourcePath.getHost(), parentString);
-        } catch (MalformedURLException e) {
-            throw new ConfigurationParsingException("Could not create URL to parent path", e);
-        }
-    }
-
     /**
      * Return a String representation of the path of a {@link URL}.
      * Strips the {@literal "}file:{@literal "} prefix from an URL, if it exist.
      * @param url The URL that needs to be stripped
      * @return The String representation of the path of a URL where the leading {@literal "}file:{@literal "} prefix is stripped.
      */
-    private static String getPath(final URL url) throws ConfigurationParsingException {
+    private static String getPathNoFilePrefix(final URL url) throws ConfigurationParsingException {
         String urlString = UrlHelper.getPathString(url);
         return urlString.replaceAll("^file:", "");
     }

src/main/java/de/tudresden/inf/mci/brailleplot/util/UrlHelper.java

 package de.tudresden.inf.mci.brailleplot.util;
 
+import de.tudresden.inf.mci.brailleplot.configparser.ConfigurationParsingException;
+
+import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLDecoder;
 import java.nio.charset.StandardCharsets;
@@ -22,4 +25,20 @@ public final class UrlHelper {
     public static String getPathString(final URL url) {
         return URLDecoder.decode(url.getPath(), StandardCharsets.UTF_8);
     }
+
+    /**
+     * Returns the URL to the parent directory of a File / Resource.
+     * @param resourcePath The URL to analyze.
+     * @return The URL to the parent directory of the specified URL.
+     * @throws RuntimeException if the generated URL is not a valid URL.
+     */
+    public static URL getParentUrl(final URL resourcePath) throws ConfigurationParsingException {
+        String fileString = getPathString(resourcePath);
+        String parentString = fileString.substring(0, fileString.lastIndexOf("/"));
+        try {
+            return new URL(resourcePath.getProtocol(), resourcePath.getHost(), parentString);
+        } catch (MalformedURLException e) {
+            throw new RuntimeException("Could not create URL to parent path", e);
+        }
+    }
 }