Display stats when converting an uncompressed file

1 files changed, 18 insertions, 0 deletions

diff --git a/src/io/CompressableDataWriter.java b/src/io/CompressableDataWriter.java
index a3b069f..d81d80b 100644
--- a/src/io/CompressableDataWriter.java
+++ b/src/io/CompressableDataWriter.java
@@ -106,6 +106,7 @@ public class CompressableDataWriter extends DataWriter {
             OutputStream gzOs = null;
             try {
                 File origFile = new File(getFileName());
+                long origSize = origFile.length();
                 fis = new FileInputStream(origFile);
                 newTmpFile = File.createTempFile(getFileName(), "origFile",
                         origFile.getParentFile());
@@ -115,12 +116,15 @@ public class CompressableDataWriter extends DataWriter {
                 IOUtils.copy(fis, gzOs);
                 gzOs.close();
                 fis.close();
+                long newSize = newTmpFile.length();
 
                 // compression ready! Don't delete the result!
                 Files.move(newTmpFile.toPath(), origFile.toPath(),
                         StandardCopyOption.REPLACE_EXISTING);
                 newTmpFile = null;
                 compressable = true;
+                // show some compression stats
+                printStats(origSize, newSize);
             } catch (IOException ex) {
                 // failed to convert (disk space too low? Not compressed?)
                 getLogger().log(Level.INFO, getFileName() + ": Unable to "
@@ -134,6 +138,20 @@ public class CompressableDataWriter extends DataWriter {
             }
         }
 
+        private void printStats(long origSize, long newSize) {
+            String msg = "Succesfully converted " + getFileName() + ". ";
+            msg += "Uncompressed size: " + origSize + "; "
+                    + "compressed size: " + newSize + ".";
+            if (newSize > 0 && origSize > 0) {
+                long bytesSaved = origSize - newSize;
+                long perc = 100 * -bytesSaved / origSize;
+                if (bytesSaved > 0) {
+                    msg += " Saved " + bytesSaved + " bytes (" + perc + "%). ";
+                }
+            }
+            getLogger().info(msg);
+        }
+
         private Logger getLogger() {
             return Logger.getLogger(this.getClass().getName());
         }