Annotate Filter interface with @NotNull

[rhynodge.git] / src / main / java / net / pterodactylus / rhynodge / filters / EpisodeFilter.java

diff --git a/src/main/java/net/pterodactylus/rhynodge/filters/EpisodeFilter.java b/src/main/java/net/pterodactylus/rhynodge/filters/EpisodeFilter.java
index 821c1f1..6aa3e1f 100644 (file)
--- a/src/main/java/net/pterodactylus/rhynodge/filters/EpisodeFilter.java
+++ b/src/main/java/net/pterodactylus/rhynodge/filters/EpisodeFilter.java
@@ -38,6 +38,8 @@ import com.google.common.base.Function;
 import com.google.common.base.Optional;
 import com.google.common.collect.HashMultimap;
 import com.google.common.collect.Multimap;
+import org.apache.log4j.Logger;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * {@link Filter} implementation that extracts {@link Episode} information from
@@ -47,6 +49,8 @@ import com.google.common.collect.Multimap;
  */
 public class EpisodeFilter implements Filter {
 
+       private static final Logger logger = Logger.getLogger(EpisodeFilter.class);
+
        /** The pattern to parse episode information from the filename. */
        private static final Collection<Pattern> episodePatterns = asList(Pattern.compile("[Ss](\\d{2})[Ee](\\d{2})"), Pattern.compile("[^\\d](\\d{1,2})x(\\d{2})[^\\d]"));
 
@@ -57,8 +61,9 @@ public class EpisodeFilter implements Filter {
        /**
         * {@inheritDoc}
         */
+       @NotNull
        @Override
-       public State filter(State state) {
+       public State filter(@NotNull State state) {
                if (!state.success()) {
                        return FailedState.from(state);
                }
@@ -111,6 +116,7 @@ public class EpisodeFilter implements Filter {
         *         no episode information could be found
         */
        private static Optional<Episode> extractEpisode(TorrentFile torrentFile) {
+               logger.debug(String.format("Extracting episode from %s...", torrentFile));
                for (Pattern episodePattern : episodePatterns) {
                        Matcher matcher = episodePattern.matcher(torrentFile.name());
                        if (!matcher.find() || matcher.groupCount() < 2) {
@@ -118,6 +124,7 @@ public class EpisodeFilter implements Filter {
                        }
                        String seasonString = matcher.group(1);
                        String episodeString = matcher.group(2);
+                       logger.debug(String.format("Parsing %s and %s as season and episode...", seasonString, episodeString));
                        int season = Integer.valueOf(seasonString);
                        int episode = Integer.valueOf(episodeString);
                        return Optional.of(new Episode(season, episode));