/**
* Build an {@link RawContactDelta} using the given {@link RawContact} as a starting point; the
* "before" snapshot.
*/
public static RawContactDelta fromBefore(RawContact before) {
final RawContactDelta rawContactDelta = new RawContactDelta();
rawContactDelta.mValues = ValuesDelta.fromBefore(before.getValues());
rawContactDelta.mValues.setIdColumn(RawContacts._ID);
for (final ContentValues values : before.getContentValues()) {
rawContactDelta.addEntry(ValuesDelta.fromBefore(values));
}
return rawContactDelta;
}
/**
* Merge the "after" values from the given {@link RawContactDelta} onto the "before" state
* represented by this {@link RawContactDelta}, discarding any existing "after" states. This is
* typically used when re-parenting changes onto an updated {@link Entity}.
*/
public static RawContactDelta mergeAfter(RawContactDelta local, RawContactDelta remote) {
// Bail early if trying to merge delete with missing local
final ValuesDelta remoteValues = remote.mValues;
if (local == null && (remoteValues.isDelete() || remoteValues.isTransient())) return null;
// Create local version if none exists yet
if (local == null) local = new RawContactDelta();
if (LOGV) {
final Long localVersion =
(local.mValues == null) ? null : local.mValues.getAsLong(RawContacts.VERSION);
final Long remoteVersion = remote.mValues.getAsLong(RawContacts.VERSION);
Log.d(TAG, "Re-parenting from original version " + remoteVersion + " to " + localVersion);
}
// Create values if needed, and merge "after" changes
local.mValues = ValuesDelta.mergeAfter(local.mValues, remote.mValues);
// Find matching local entry for each remote values, or create
for (ArrayList<ValuesDelta> mimeEntries : remote.mEntries.values()) {
for (ValuesDelta remoteEntry : mimeEntries) {
final Long childId = remoteEntry.getId();
// Find or create local match and merge
final ValuesDelta localEntry = local.getEntry(childId);
final ValuesDelta merged = ValuesDelta.mergeAfter(localEntry, remoteEntry);
if (localEntry == null && merged != null) {
// No local entry before, so insert
local.addEntry(merged);
}
}
}
return local;
}