add version matching

Author: uschindler

src/main/java/de/thetaphi/forbiddenapis/Signatures.java

@@ -36,6 +36,7 @@
 import java.util.LinkedHashSet;
 import java.util.Locale;
 import java.util.Map;
+import java.util.NoSuchElementException;
 import java.util.Set;
 import java.util.SortedSet;
 import java.util.TreeSet;
@@ -306,6 +307,18 @@ private void addBundledSignatures(String name, String jdkTargetVersion, boolean
         name = name + "-" + jdkTargetVersion;
         name = fixTargetVersion(name);
       }
+      // downgrade the version number to next lower signatures file:
+      final Matcher matcher;
+      if (!BUNDLED_SIGNATURES_NAMES.contains(name) && (matcher = ENDS_WITH_VERSION_PATTERN.matcher(name)).matches()) try {
+        final String s = BUNDLED_SIGNATURES_NAMES.headSet(name).last();
+        if (s.startsWith(matcher.group(1)) && ENDS_WITH_VERSION_PATTERN.matcher(s).matches()) {
+          logger.warn("Bundled signatures '" + name + "' not found, choosing next lower version '" + s + "'.");
+          name = s;
+        }
+      } catch (NoSuchElementException nse) {
+        throw new FileNotFoundException("Bundled signatures resource not found: " + name);
+      }
+      // check name again:
       if (!BUNDLED_SIGNATURES_NAMES.contains(name)) {
         throw new FileNotFoundException("Bundled signatures resource not found: " + name);
       }