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utility method to calculate average time between entries

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Athou
2013-05-19 12:54:15 +02:00
parent 65a32c8cdd
commit df52dcd748
3 changed files with 27 additions and 7 deletions
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15
src/main/java/com/commafeed/backend/feeds/FeedUtils.java
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@@ -1,12 +1,17 @@
package com.commafeed.backend.feeds;
import java.util.List;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.math.stat.descriptive.SummaryStatistics;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document.OutputSettings;
import org.jsoup.nodes.Entities.EscapeMode;
import org.jsoup.safety.Whitelist;
import org.mozilla.universalchardet.UniversalDetector;
import com.commafeed.backend.model.FeedEntry;
public class FeedUtils {
public static String guessEncoding(byte[] bytes) {
@@ -95,4 +100,14 @@ public class FeedUtils {
}
return sb.toString();
}
public static long average(List<FeedEntry> entries) {
SummaryStatistics stats = new SummaryStatistics();
for (int i = 0; i < entries.size() - 1; i++) {
long diff = Math.abs(entries.get(i).getUpdated().getTime()
- entries.get(i + 1).getUpdated().getTime());
stats.addValue(diff);
}
return (long) stats.getMean();
}
}