diff options
Diffstat (limited to 'gallerycommon/src/com/android/gallery3d/common/BlobCache.java')
-rw-r--r-- | gallerycommon/src/com/android/gallery3d/common/BlobCache.java | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gallerycommon/src/com/android/gallery3d/common/BlobCache.java b/gallerycommon/src/com/android/gallery3d/common/BlobCache.java index 7788e61f5..3c131e591 100644 --- a/gallerycommon/src/com/android/gallery3d/common/BlobCache.java +++ b/gallerycommon/src/com/android/gallery3d/common/BlobCache.java @@ -74,6 +74,7 @@ import java.io.RandomAccessFile; import java.nio.ByteOrder; import java.nio.MappedByteBuffer; import java.nio.channels.FileChannel; +import java.util.Arrays; import java.util.zip.Adler32; public class BlobCache implements Closeable { @@ -379,6 +380,16 @@ public class BlobCache implements Closeable { updateIndexHeader(); } + public void clearEntry(long key) throws IOException { + if (!lookupInternal(key, mActiveHashStart)) { + return; // Nothing to clear + } + byte[] header = mBlobHeader; + Arrays.fill(header, (byte) 0); + mActiveDataFile.seek(mFileOffset); + mActiveDataFile.write(header); + } + // Appends the data to the active file. It also updates the hash entry. // The proper hash entry (suitable for insertion or replacement) must be // pointed by mSlotOffset. @@ -485,6 +496,9 @@ public class BlobCache implements Closeable { return false; } long blobKey = readLong(header, BH_KEY); + if (blobKey == 0) { + return false; // This entry has been cleared. + } if (blobKey != req.key) { Log.w(TAG, "blob key does not match: " + blobKey); return false; |