Slightly refactored VersionComparator (WIP 2/3)

Author: cmaglie

arduino-core/src/cc/arduino/contributions/VersionComparator.java

@@ -34,41 +34,32 @@
 import cc.arduino.contributions.libraries.ContributedLibrary;
 
 import java.util.Comparator;
+import java.util.Optional;
 
 public class VersionComparator implements Comparator<String> {
 
-  @Override
-  public int compare(String a, String b) {
-    // null is always less than any other value
-    if (a == null && b == null)
-      return 0;
-    if (a == null)
-      return -1;
-    if (b == null)
-      return 1;
-
-    Version versionA = VersionHelper.valueOf(a);
-    Version versionB = VersionHelper.valueOf(b);
-
-    return versionA.compareTo(versionB);
-  }
-
-  public static boolean greaterThan(String a, String b) {
-    // null is always less than any other value
-    if (a == null && b == null) {
-      return false;
+  public static int compareTo(String a, String b) {
+    Optional<Version> versionA = VersionHelper.valueOf(a);
+    Optional<Version> versionB = VersionHelper.valueOf(b);
+    if (versionA.isPresent() && versionB.isPresent()) {
+      return versionA.get().compareTo(versionB.get());
     }
-    if (a == null) {
-      return false;
+    if (versionA.isPresent()) {
+      return 1;
     }
-    if (b == null) {
-      return true;
+    if (versionB.isPresent()) {
+      return -1;
     }
+    return 0;
+  }
 
-    Version versionA = VersionHelper.valueOf(a);
-    Version versionB = VersionHelper.valueOf(b);
+  @Override
+  public int compare(String a, String b) {
+    return compareTo(a, b);
+  }
 
-    return versionA.greaterThan(versionB);
+  public static boolean greaterThan(String a, String b) {
+    return compareTo(a, b) > 0;
   }
 
   public static String max(String a, String b) {
@@ -79,8 +70,7 @@ public static ContributedLibrary max(ContributedLibrary a, ContributedLibrary b)
     return greaterThan(a, b) ? a : b;
   }
 
-  public static boolean greaterThan(ContributedLibrary a,
-                                    ContributedLibrary b) {
+  public static boolean greaterThan(ContributedLibrary a, ContributedLibrary b) {
     return greaterThan(a.getParsedVersion(), b.getParsedVersion());
   }
 }

arduino-core/src/processing/app/packages/UserLibrary.java

@@ -28,22 +28,24 @@
  */
 package processing.app.packages;
 
-import cc.arduino.Constants;
-import cc.arduino.contributions.VersionHelper;
-import cc.arduino.contributions.libraries.ContributedLibraryReference;
-import processing.app.helpers.PreferencesMap;
-import processing.app.packages.UserLibraryFolder.Location;
-
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.Optional;
 
 import com.github.zafarkhaja.semver.Version;
 
+import cc.arduino.Constants;
+import cc.arduino.contributions.VersionHelper;
+import cc.arduino.contributions.libraries.ContributedLibraryReference;
+import processing.app.I18n;
+import processing.app.helpers.PreferencesMap;
+import processing.app.packages.UserLibraryFolder.Location;
+
 public class UserLibrary {
 
   private String name;
@@ -148,12 +150,16 @@ public static UserLibrary create(UserLibraryFolder libFolderDesc) throws IOExcep
     }
 
     String declaredVersion = properties.get("version").trim();
-    Version version = VersionHelper.valueOf(declaredVersion);
+    Optional<Version> version = VersionHelper.valueOf(declaredVersion);
+    if (!version.isPresent()) {
+      System.err.println(
+          I18n.format("Invalid version '{0}' for library in: {1}", declaredVersion, libFolder.getAbsolutePath()));
+    }
 
     UserLibrary res = new UserLibrary();
     res.installedFolder = libFolder;
     res.name = properties.get("name").trim();
-    res.version = version.toString();
+    res.version = version.isPresent() ? version.get().toString() : declaredVersion;
     res.author = properties.get("author").trim();
     res.maintainer = properties.get("maintainer").trim();
     res.sentence = properties.get("sentence").trim();