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package tim.prune.data.sort;
import java.util.Comparator;
import tim.prune.data.DataPoint;
/**
* Class for comparing photos to sort them by name or timestamp
*/
public class PhotoComparer implements Comparator<DataPoint>
{
/** Sort mode */
private SortMode _sortMode;
/**
* Constructor
* @param inMode sort mode
*/
public PhotoComparer(SortMode inMode)
{
_sortMode = inMode;
}
/**
* Main compare method
*/
public int compare(DataPoint inP1, DataPoint inP2)
{
if (inP2 == null || inP2.getPhoto() == null) return -1; // all nulls at end
if (inP1 == null || inP1.getPhoto() == null) return 1;
// Sort by name
int result = 0;
if (_sortMode == SortMode.SORTBY_NAME) {
result = compareNames(inP1, inP2);
}
if (result == 0) {
result = compareTimes(inP1, inP2);
}
// check names if times didn't work
if (result == 0 && _sortMode == SortMode.SORTBY_TIME) {
result = compareNames(inP1, inP2);
}
// names and times equal, try width and height
if (result == 0) {
result = compareSizes(inP1, inP2);
}
return result;
}
/**
* Compare the names of the two photo points
* @param inP1 first point
* @param inP2 second point
* @return compare value (-1,0,1)
*/
private int compareNames(DataPoint inP1, DataPoint inP2)
{
// If the files can't be compared, use the photo names
if (inP1.getPhoto().getFile() == null || inP2.getPhoto().getFile() == null) {
return inP1.getPhoto().getName().compareTo(inP2.getPhoto().getName());
}
// both photos have files, so just compare the files
return inP1.getPhoto().getFile().compareTo(inP2.getPhoto().getFile());
}
/**
* Compare the timestamps of the two photo points
* @param inP1 first point
* @param inP2 second point
* @return compare value (-1,0,1)
*/
private int compareTimes(DataPoint inP1, DataPoint inP2)
{
// Photos might not have timestamps
if (!inP2.hasTimestamp()) return -1;
if (!inP1.hasTimestamp()) return 1;
// Compare the timestamps
long secDiff = inP1.getPhoto().getTimestamp().getMillisecondsSince(inP2.getPhoto().getTimestamp());
return (secDiff<0?-1:(secDiff==0?0:1));
}
/**
* Compare the sizes of the two photos
* @param inP1 first point
* @param inP2 second point
* @return compare value (-1,0,1)
*/
private int compareSizes(DataPoint inP1, DataPoint inP2)
{
// Try the widths
int w1 = inP1.getPhoto().getWidth();
int w2 = inP2.getPhoto().getWidth();
if (w2 <= 0) return -1;
if (w1 <= 0) return 1;
if (w1 != w2) return (w2 > w1 ? 1 : -1);
// Try the heights
int h1 = inP1.getPhoto().getHeight();
int h2 = inP2.getPhoto().getHeight();
if (h2 <= 0) return -1;
if (h1 <= 0) return 1;
if (h1 != h2) return (h2 > h1 ? 1 : -1);
// sizes same
return 0;
}
}
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