public IList <QueryRow> QueryWithOptions(QueryOptions options)
{
if (options == null)
{
options = new QueryOptions();
}
Cursor cursor = null;
IList <QueryRow> rows = new AList <QueryRow>();
try
{
cursor = ResultSetWithOptions(options);
int groupLevel = options.GetGroupLevel();
bool group = options.IsGroup() || (groupLevel > 0);
bool reduce = options.IsReduce() || group;
if (reduce && (reduceBlock == null) && !group)
{
string msg = "Cannot use reduce option in view " + name + " which has no reduce block defined";
Log.W(Database.Tag, msg);
throw new CouchbaseLiteException(new Status(Status.BadRequest));
}
if (reduce || group)
{
// Reduced or grouped query:
rows = ReducedQuery(cursor, group, groupLevel);
}
else
{
// regular query
cursor.MoveToNext();
while (!cursor.IsAfterLast())
{
object keyData = FromJSON(cursor.GetBlob(0));
// TODO: delay parsing this for increased efficiency
object value = FromJSON(cursor.GetBlob(1));
// TODO: ditto
string docId = cursor.GetString(2);
int sequence = Sharpen.Extensions.ValueOf(cursor.GetString(3));
IDictionary <string, object> docContents = null;
if (options.IsIncludeDocs())
{
// http://wiki.apache.org/couchdb/Introduction_to_CouchDB_views#Linked_documents
if (value is IDictionary && ((IDictionary)value).ContainsKey("_id"))
{
string linkedDocId = (string)((IDictionary)value).Get("_id");
RevisionInternal linkedDoc = database.GetDocumentWithIDAndRev(linkedDocId, null,
EnumSet.NoneOf <Database.TDContentOptions>());
docContents = linkedDoc.GetProperties();
}
else
{
docContents = database.DocumentPropertiesFromJSON(cursor.GetBlob(5), docId, cursor
.GetString(4), false, cursor.GetLong(3), options.GetContentOptions());
}
}
QueryRow row = new QueryRow(docId, sequence, keyData, value, docContents);
row.SetDatabase(database);
rows.AddItem(row);
cursor.MoveToNext();
}
}
}
catch (SQLException e)
{
string errMsg = string.Format("Error querying view: %s", this);
Log.E(Database.Tag, errMsg, e);
throw new CouchbaseLiteException(errMsg, e, new Status(Status.DbError));
}
finally
{
if (cursor != null)
{
cursor.Close();
}
}
return(rows);
}
public void UpdateIndex()
{
Log.V(Database.Tag, "Re-indexing view " + name + " ...");
System.Diagnostics.Debug.Assert((mapBlock != null));
if (GetViewId() < 0)
{
string msg = string.Format("getViewId() < 0");
throw new CouchbaseLiteException(msg, new Status(Status.NotFound));
}
database.BeginTransaction();
Status result = new Status(Status.InternalServerError);
Cursor cursor = null;
try
{
long lastSequence = GetLastSequenceIndexed();
long dbMaxSequence = database.GetLastSequenceNumber();
if (lastSequence == dbMaxSequence)
{
// nothing to do (eg, kCBLStatusNotModified)
string msg = string.Format("lastSequence (%d) == dbMaxSequence (%d), nothing to do"
, lastSequence, dbMaxSequence);
Log.D(Database.Tag, msg);
result.SetCode(Status.Ok);
return;
}
// First remove obsolete emitted results from the 'maps' table:
long sequence = lastSequence;
if (lastSequence < 0)
{
string msg = string.Format("lastSequence < 0 (%s)", lastSequence);
throw new CouchbaseLiteException(msg, new Status(Status.InternalServerError));
}
if (lastSequence == 0)
{
// If the lastSequence has been reset to 0, make sure to remove
// any leftover rows:
string[] whereArgs = new string[] { Sharpen.Extensions.ToString(GetViewId()) };
database.GetDatabase().Delete("maps", "view_id=?", whereArgs);
}
else
{
// Delete all obsolete map results (ones from since-replaced
// revisions):
string[] args = new string[] { Sharpen.Extensions.ToString(GetViewId()), System.Convert.ToString
(lastSequence), System.Convert.ToString(lastSequence) };
database.GetDatabase().ExecSQL("DELETE FROM maps WHERE view_id=? AND sequence IN ("
+ "SELECT parent FROM revs WHERE sequence>? " + "AND parent>0 AND parent<=?)",
args);
}
int deleted = 0;
cursor = database.GetDatabase().RawQuery("SELECT changes()", null);
cursor.MoveToNext();
deleted = cursor.GetInt(0);
cursor.Close();
// This is the emit() block, which gets called from within the
// user-defined map() block
// that's called down below.
AbstractTouchMapEmitBlock emitBlock = new _AbstractTouchMapEmitBlock_446(this);
// find a better way to propagate this back
// Now scan every revision added since the last time the view was
// indexed:
string[] selectArgs = new string[] { System.Convert.ToString(lastSequence) };
cursor = database.GetDatabase().RawQuery("SELECT revs.doc_id, sequence, docid, revid, json FROM revs, docs "
+ "WHERE sequence>? AND current!=0 AND deleted=0 " + "AND revs.doc_id = docs.doc_id "
+ "ORDER BY revs.doc_id, revid DESC", selectArgs);
cursor.MoveToNext();
long lastDocID = 0;
while (!cursor.IsAfterLast())
{
long docID = cursor.GetLong(0);
if (docID != lastDocID)
{
// Only look at the first-iterated revision of any document,
// because this is the
// one with the highest revid, hence the "winning" revision
// of a conflict.
lastDocID = docID;
// Reconstitute the document as a dictionary:
sequence = cursor.GetLong(1);
string docId = cursor.GetString(2);
if (docId.StartsWith("_design/"))
{
// design docs don't get indexed!
cursor.MoveToNext();
continue;
}
string revId = cursor.GetString(3);
byte[] json = cursor.GetBlob(4);
IDictionary <string, object> properties = database.DocumentPropertiesFromJSON(json
, docId, revId, false, sequence, EnumSet.NoneOf <Database.TDContentOptions>());
if (properties != null)
{
// Call the user-defined map() to emit new key/value
// pairs from this revision:
Log.V(Database.Tag, " call map for sequence=" + System.Convert.ToString(sequence
));
emitBlock.SetSequence(sequence);
mapBlock.Map(properties, emitBlock);
}
}
cursor.MoveToNext();
}
// Finally, record the last revision sequence number that was
// indexed:
ContentValues updateValues = new ContentValues();
updateValues.Put("lastSequence", dbMaxSequence);
string[] whereArgs_1 = new string[] { Sharpen.Extensions.ToString(GetViewId()) };
database.GetDatabase().Update("views", updateValues, "view_id=?", whereArgs_1);
// FIXME actually count number added :)
Log.V(Database.Tag, "...Finished re-indexing view " + name + " up to sequence " +
System.Convert.ToString(dbMaxSequence) + " (deleted " + deleted + " added " + "?"
+ ")");
result.SetCode(Status.Ok);
}
catch (SQLException e)
{
throw new CouchbaseLiteException(e, new Status(Status.DbError));
}
finally
{
if (cursor != null)
{
cursor.Close();
}
if (!result.IsSuccessful())
{
Log.W(Database.Tag, "Failed to rebuild view " + name + ": " + result.GetCode());
}
if (database != null)
{
database.EndTransaction(result.IsSuccessful());
}
}
}
/// <summary>Queries the view.</summary>
/// <remarks>Queries the view. Does NOT first update the index.</remarks>
/// <param name="options">The options to use.</param>
/// <returns>An array of QueryRow objects.</returns>
/// <exception cref="Couchbase.Lite.CouchbaseLiteException"></exception>
internal IEnumerable <QueryRow> QueryWithOptions(QueryOptions options)
{
if (options == null)
{
options = new QueryOptions();
}
Cursor cursor = null;
IList <QueryRow> rows = new List <QueryRow>();
try
{
cursor = ResultSetWithOptions(options);
int groupLevel = options.GetGroupLevel();
var group = options.IsGroup() || (groupLevel > 0);
var reduce = options.IsReduce() || group;
var reduceBlock = Reduce;
if (reduce && (reduceBlock == null) && !group)
{
var msg = "Cannot use reduce option in view " + Name + " which has no reduce block defined";
Log.W(Database.Tag, msg);
throw new CouchbaseLiteException(StatusCode.BadRequest);
}
if (reduce || group)
{
// Reduced or grouped query:
rows = ReducedQuery(cursor, group, groupLevel);
}
else
{
// regular query
cursor.MoveToNext();
while (!cursor.IsAfterLast())
{
var lazyKey = new Lazy <object>(() => FromJSON(cursor.GetBlob(0)));
var lazyValue = new Lazy <object>(() => FromJSON(cursor.GetBlob(1)));
// TODO: ditto
var docId = cursor.GetString(2);
var sequenceLong = cursor.GetLong(3);
var sequence = Convert.ToInt32(sequenceLong);
IDictionary <string, object> docContents = null;
if (options.IsIncludeDocs())
{
// http://wiki.apache.org/couchdb/Introduction_to_CouchDB_views#Linked_documents
if (lazyValue.Value is IDictionary <string, object> && ((IDictionary <string, object>)lazyValue.Value).ContainsKey("_id"))
{
var linkedDocId = (string)((IDictionary <string, object>)lazyValue.Value).Get("_id");
var linkedDoc = Database.GetDocumentWithIDAndRev(linkedDocId, null, DocumentContentOptions.None);
docContents = linkedDoc.GetProperties();
}
else
{
var revId = cursor.GetString(4);
docContents = Database.DocumentPropertiesFromJSON(cursor.GetBlob(5), docId, revId, false, sequenceLong, options.GetContentOptions());
}
}
var row = new QueryRow(docId, sequence, lazyKey.Value, lazyValue.Value, docContents);
row.Database = Database;
rows.AddItem <QueryRow>(row); // NOTE.ZJG: Change to `yield return row` to convert to a generator.
cursor.MoveToNext();
}
}
}
catch (SQLException e)
{
var errMsg = string.Format("Error querying view: {0}", this);
Log.E(Database.Tag, errMsg, e);
throw new CouchbaseLiteException(errMsg, e, new Status(StatusCode.DbError));
}
finally
{
if (cursor != null)
{
cursor.Close();
}
}
return(rows);
}
internal void UpdateIndex()
{
Log.V(Database.Tag, "Re-indexing view {0} ...", Name);
System.Diagnostics.Debug.Assert((Map != null));
if (Id <= 0)
{
var msg = string.Format("View.Id <= 0");
throw new CouchbaseLiteException(msg, new Status(StatusCode.NotFound));
}
Database.BeginTransaction();
var result = new Status(StatusCode.InternalServerError);
Cursor cursor = null;
try
{
var lastSequence = LastSequenceIndexed;
var dbMaxSequence = Database.LastSequenceNumber;
if (lastSequence == dbMaxSequence)
{
// nothing to do (eg, kCBLStatusNotModified)
Log.V(Database.Tag, "lastSequence ({0}) == dbMaxSequence ({1}), nothing to do", lastSequence, dbMaxSequence);
result.SetCode(StatusCode.NotModified);
return;
}
// First remove obsolete emitted results from the 'maps' table:
var sequence = lastSequence;
if (lastSequence < 0)
{
var msg = string.Format("lastSequence < 0 ({0})", lastSequence);
throw new CouchbaseLiteException(msg, new Status(StatusCode.InternalServerError));
}
if (lastSequence == 0)
{
// If the lastSequence has been reset to 0, make sure to remove
// any leftover rows:
var whereArgs = new string[] { Id.ToString() };
Database.StorageEngine.Delete("maps", "view_id=?", whereArgs);
}
else
{
// Delete all obsolete map results (ones from since-replaced
// revisions):
var args = new [] {
Id.ToString(),
lastSequence.ToString(),
lastSequence.ToString()
};
Database.StorageEngine.ExecSQL(
"DELETE FROM maps WHERE view_id=? AND sequence IN ("
+ "SELECT parent FROM revs WHERE sequence>? " + "AND parent>0 AND parent<=?)",
args);
}
var deleted = 0;
cursor = Database.StorageEngine.RawQuery("SELECT changes()");
cursor.MoveToNext();
deleted = cursor.GetInt(0);
cursor.Close();
// Find a better way to propagate this back
// Now scan every revision added since the last time the view was indexed:
var selectArgs = new[] { lastSequence.ToString() };
cursor = Database.StorageEngine.RawQuery("SELECT revs.doc_id, sequence, docid, revid, json, no_attachments FROM revs, docs "
+ "WHERE sequence>? AND current!=0 AND deleted=0 "
+ "AND revs.doc_id = docs.doc_id "
+ "ORDER BY revs.doc_id, revid DESC", CommandBehavior.SequentialAccess, selectArgs);
var lastDocID = 0L;
var keepGoing = cursor.MoveToNext();
while (keepGoing)
{
long docID = cursor.GetLong(0);
if (docID != lastDocID)
{
// Only look at the first-iterated revision of any document,
// because this is the
// one with the highest revid, hence the "winning" revision
// of a conflict.
lastDocID = docID;
// Reconstitute the document as a dictionary:
sequence = cursor.GetLong(1);
string docId = cursor.GetString(2);
if (docId.StartsWith("_design/", StringComparison.InvariantCultureIgnoreCase))
{
// design docs don't get indexed!
keepGoing = cursor.MoveToNext();
continue;
}
var revId = cursor.GetString(3);
var json = cursor.GetBlob(4);
var noAttachments = cursor.GetInt(5) > 0;
// Skip rows with the same doc_id -- these are losing conflicts.
while ((keepGoing = cursor.MoveToNext()) && cursor.GetLong(0) == docID)
{
}
if (lastSequence > 0)
{
// Find conflicts with documents from previous indexings.
var selectArgs2 = new[] { Convert.ToString(docID), Convert.ToString(lastSequence) };
var cursor2 = Database.StorageEngine.RawQuery("SELECT revid, sequence FROM revs "
+ "WHERE doc_id=? AND sequence<=? AND current!=0 AND deleted=0 " + "ORDER BY revID DESC "
+ "LIMIT 1", selectArgs2);
if (cursor2.MoveToNext())
{
var oldRevId = cursor2.GetString(0);
// This is the revision that used to be the 'winner'.
// Remove its emitted rows:
var oldSequence = cursor2.GetLong(1);
var args = new[] { Sharpen.Extensions.ToString(Id), Convert.ToString(oldSequence) };
Database.StorageEngine.ExecSQL("DELETE FROM maps WHERE view_id=? AND sequence=?", args);
if (RevisionInternal.CBLCompareRevIDs(oldRevId, revId) > 0)
{
// It still 'wins' the conflict, so it's the one that
// should be mapped [again], not the current revision!
revId = oldRevId;
sequence = oldSequence;
var selectArgs3 = new[] { Convert.ToString(sequence) };
json = Misc.ByteArrayResultForQuery(
Database.StorageEngine,
"SELECT json FROM revs WHERE sequence=?",
selectArgs3
);
}
}
}
// Get the document properties, to pass to the map function:
var contentOptions = DocumentContentOptions.None;
if (noAttachments)
{
contentOptions |= DocumentContentOptions.NoAttachments;
}
var properties = Database.DocumentPropertiesFromJSON(
json, docId, revId, false, sequence, DocumentContentOptions.None
);
if (properties != null)
{
// Call the user-defined map() to emit new key/value
// pairs from this revision:
// This is the emit() block, which gets called from within the
// user-defined map() block
// that's called down below.
var enclosingView = this;
var thisSequence = sequence;
var map = Map;
if (map == null)
{
throw new CouchbaseLiteException("Map function is missing.");
}
EmitDelegate emitBlock = (key, value) =>
{
// TODO: Do we need to do any null checks on key or value?
try
{
var keyJson = Manager.GetObjectMapper().WriteValueAsString(key);
var valueJson = value == null ? null : Manager.GetObjectMapper().WriteValueAsString(value);
var insertValues = new ContentValues();
insertValues.Put("view_id", enclosingView.Id);
insertValues["sequence"] = thisSequence;
insertValues["key"] = keyJson;
insertValues["value"] = valueJson;
enclosingView.Database.StorageEngine.Insert("maps", null, insertValues);
//
// According to the issue #81, it is possible that there will be another
// thread inserting a new revision to the database at the same time that
// the UpdateIndex operation is running. This event should be guarded by
// the database transaction that the code begun but apparently it was not.
// As a result, it is possible that dbMaxSequence will be out of date at
// this point and could cause the last indexed sequence to be out of track
// from the obsolete map entry cleanup operation, which eventually results
// to duplicated documents in the indexed map.
//
// To prevent the issue above, as a workaroubd, we need to make sure that
// we have the current max sequence of the indexed documents updated.
// This diverts from the CBL's Android code which doesn't have the same issue
// as the Android doesn't allow multiple thread to interact with the database
// at the same time.
if (thisSequence > dbMaxSequence)
{
dbMaxSequence = thisSequence;
}
}
catch (Exception e)
{
Log.E(Database.Tag, "Error emitting", e);
}
};
map(properties, emitBlock);
}
}
}
// Finally, record the last revision sequence number that was
// indexed:
var updateValues = new ContentValues();
updateValues["lastSequence"] = dbMaxSequence;
var whereArgs_1 = new string[] { Id.ToString() };
Database.StorageEngine.Update("views", updateValues, "view_id=?", whereArgs_1);
// FIXME actually count number added :)
Log.V(Database.Tag, "...Finished re-indexing view {0} up to sequence {1} (deleted {2} added ?)", Name, Convert.ToString(dbMaxSequence), deleted);
result.SetCode(StatusCode.Ok);
}
catch (Exception e)
{
throw new CouchbaseLiteException(e, new Status(StatusCode.DbError));
}
finally
{
if (cursor != null)
{
cursor.Close();
}
if (!result.IsSuccessful)
{
Log.W(Database.Tag, "Failed to rebuild view {0}:{1}", Name, result.GetCode());
}
if (Database != null)
{
Database.EndTransaction(result.IsSuccessful);
}
}
}
/// <summary>
/// Defines the View's <see cref="Couchbase.Lite.MapDelegate"/>
/// and <see cref="Couchbase.Lite.ReduceDelegate"/>.
/// </summary>
/// <remarks>
/// Defines a view's functions.
/// The view's definition is given as a class that conforms to the Mapper or
/// Reducer interface (or null to delete the view). The body of the block
/// should call the 'emit' object (passed in as a paramter) for every key/value pair
/// it wants to write to the view.
/// Since the function itself is obviously not stored in the database (only a unique
/// string idenfitying it), you must re-define the view on every launch of the app!
/// If the database needs to rebuild the view but the function hasn't been defined yet,
/// it will fail and the view will be empty, causing weird problems later on.
/// It is very important that this block be a law-abiding map function! As in other
/// languages, it must be a "pure" function, with no side effects, that always emits
/// the same values given the same input document. That means that it should not access
/// or change any external state; be careful, since callbacks make that so easy that you
/// might do it inadvertently! The callback may be called on any thread, or on
/// multiple threads simultaneously. This won't be a problem if the code is "pure" as
/// described above, since it will as a consequence also be thread-safe.
/// </remarks>
/// <returns>
/// <c>true</c> if the <see cref="Couchbase.Lite.MapDelegate"/>
/// and <see cref="Couchbase.Lite.ReduceDelegate"/> were set, otherwise <c>false</c>.
/// If the values provided are identical to the values that are already set,
/// then the values will not be updated and <c>false</c> will be returned.
/// In addition, if <c>true</c> is returned, the index was deleted and
/// will be rebuilt on the next <see cref="Couchbase.Lite.Query"/> execution.
/// </returns>
/// <param name="map">The <see cref="Couchbase.Lite.MapDelegate"/> to set.</param>
/// <param name="reduce">The <see cref="Couchbase.Lite.ReduceDelegate"/> to set.</param>
/// <param name="version">
/// The key of the property value to return. The value of this parameter must change
/// when the <see cref="Couchbase.Lite.MapDelegate"/> and/or <see cref="Couchbase.Lite.ReduceDelegate"/>
/// are changed in a way that will cause them to produce different results.
/// </param>
public Boolean SetMapReduce(MapDelegate map, ReduceDelegate reduce, String version)
{
System.Diagnostics.Debug.Assert(map != null);
System.Diagnostics.Debug.Assert(version != null); // String.Empty is valid.
Map = map;
Reduce = reduce;
if (!Database.Open())
{
return(false);
}
// Update the version column in the database. This is a little weird looking
// because we want to
// avoid modifying the database if the version didn't change, and because the
// row might not exist yet.
var storageEngine = this.Database.StorageEngine;
// Older Android doesnt have reliable insert or ignore, will to 2 step
// FIXME review need for change to execSQL, manual call to changes()
const string sql = "SELECT name, version FROM views WHERE name=?"; // TODO: Convert to ADO params.
var args = new [] { Name };
Cursor cursor = null;
// NOTE: Probably needs to be a run in transaction call.
try
{
cursor = storageEngine.RawQuery(sql, args);
if (!cursor.MoveToNext())
{
// no such record, so insert
var insertValues = new ContentValues();
insertValues["name"] = Name;
insertValues["version"] = version;
storageEngine.Insert("views", null, insertValues);
return(true);
}
if (cursor != null)
{
cursor.Close();
cursor = null;
}
var updateValues = new ContentValues();
updateValues["version"] = version;
updateValues["lastSequence"] = 0;
var whereArgs = new [] { Name, version };
var rowsAffected = storageEngine.Update("views", updateValues, "name=? AND version!=?", whereArgs);
return(rowsAffected > 0);
}
catch (SQLException e)
{
Log.E(Database.Tag, "Error setting map block", e);
return(false);
}
finally
{
if (cursor != null)
{
cursor.Close();
}
}
}
internal void UpdateIndex()
{
Log.V(Database.Tag, "Re-indexing view " + Name + " ...");
System.Diagnostics.Debug.Assert((Map != null));
if (Id < 0)
{
var msg = string.Format("View.Id < 0");
throw new CouchbaseLiteException(msg, new Status(StatusCode.NotFound));
}
Database.BeginTransaction();
var result = new Status(StatusCode.InternalServerError);
Cursor cursor = null;
try
{
var lastSequence = LastSequenceIndexed;
var dbMaxSequence = Database.LastSequenceNumber;
if (lastSequence == dbMaxSequence)
{
// nothing to do (eg, kCBLStatusNotModified)
var msg = String.Format("lastSequence ({0}) == dbMaxSequence ({1}), nothing to do", lastSequence, dbMaxSequence);
Log.D(Database.Tag, msg);
result.SetCode(StatusCode.Ok);
return;
}
// First remove obsolete emitted results from the 'maps' table:
var sequence = lastSequence;
if (lastSequence < 0)
{
var msg = string.Format("lastSequence < 0 ({0})", lastSequence);
throw new CouchbaseLiteException(msg, new Status(StatusCode.InternalServerError));
}
if (lastSequence == 0)
{
// If the lastSequence has been reset to 0, make sure to remove
// any leftover rows:
var whereArgs = new string[] { Sharpen.Extensions.ToString(Id) };
Database.StorageEngine.Delete("maps", "view_id=@", whereArgs);
}
else
{
// Delete all obsolete map results (ones from since-replaced
// revisions):
var args = new [] {
Id.ToString(),
lastSequence.ToString(),
lastSequence.ToString()
};
Database.StorageEngine.ExecSQL(
"DELETE FROM maps WHERE view_id=@ AND sequence IN ("
+ "SELECT parent FROM revs WHERE sequence>@ " + "AND parent>0 AND parent<=@)",
args);
}
var deleted = 0;
cursor = Database.StorageEngine.RawQuery("SELECT changes()", null); // TODO: Convert to ADO params.
cursor.MoveToNext();
deleted = cursor.GetInt(0);
cursor.Close();
// find a better way to propagate this back
// Now scan every revision added since the last time the view was
// indexed:
var selectArgs = new[] { Convert.ToString(lastSequence) };
cursor = Database.StorageEngine.RawQuery("SELECT revs.doc_id, sequence, docid, revid, json FROM revs, docs "
+ "WHERE sequence>@ AND current!=0 AND deleted=0 " + "AND revs.doc_id = docs.doc_id "
+ "ORDER BY revs.doc_id, revid DESC", CommandBehavior.SequentialAccess, selectArgs);
cursor.MoveToNext();
var lastDocID = 0L;
while (!cursor.IsAfterLast())
{
long docID = cursor.GetLong(0);
if (docID != lastDocID)
{
// Only look at the first-iterated revision of any document,
// because this is the
// one with the highest revid, hence the "winning" revision
// of a conflict.
lastDocID = docID;
// Reconstitute the document as a dictionary:
sequence = cursor.GetLong(1);
string docId = cursor.GetString(2);
if (docId.StartsWith("_design/", StringCompare.IgnoreCase))
{
// design docs don't get indexed!
cursor.MoveToNext();
continue;
}
var revId = cursor.GetString(3);
var json = cursor.GetBlob(4);
var properties = Database.DocumentPropertiesFromJSON(
json, docId, revId, false, sequence, EnumSet.NoneOf <TDContentOptions>()
);
if (properties != null)
{
// Call the user-defined map() to emit new key/value
// pairs from this revision:
Log.V(Database.Tag, " call map for sequence=" + System.Convert.ToString(sequence
));
// This is the emit() block, which gets called from within the
// user-defined map() block
// that's called down below.
var enclosingView = this;
var thisSequence = sequence;
var map = Map;
if (map == null)
{
throw new CouchbaseLiteException("Map function is missing.");
}
EmitDelegate emitBlock = (key, value) =>
{
// TODO: Do we need to do any null checks on key or value?
try
{
var keyJson = Manager.GetObjectMapper().WriteValueAsString(key);
var valueJson = value == null ? null : Manager.GetObjectMapper().WriteValueAsString(value);
Log.V(Database.Tag, String.Format(" emit({0}, {1})", keyJson, valueJson));
var insertValues = new ContentValues();
insertValues.Put("view_id", enclosingView.Id);
insertValues["sequence"] = thisSequence;
insertValues["key"] = keyJson;
insertValues["value"] = valueJson;
enclosingView.Database.StorageEngine.Insert("maps", null, insertValues);
}
catch (Exception e)
{
Log.E(Database.Tag, "Error emitting", e);
}
};
map(properties, emitBlock);
}
}
cursor.MoveToNext();
}
// Finally, record the last revision sequence number that was
// indexed:
ContentValues updateValues = new ContentValues();
updateValues["lastSequence"] = dbMaxSequence;
var whereArgs_1 = new string[] { Sharpen.Extensions.ToString(Id) };
Database.StorageEngine.Update("views", updateValues, "view_id=@", whereArgs_1);
// FIXME actually count number added :)
Log.V(Database.Tag, "...Finished re-indexing view " + Name + " up to sequence " +
System.Convert.ToString(dbMaxSequence) + " (deleted " + deleted + " added " + "?" + ")");
result.SetCode(StatusCode.Ok);
}
catch (SQLException e)
{
throw new CouchbaseLiteException(e, new Status(StatusCode.DbError));
}
finally
{
if (cursor != null)
{
cursor.Close();
}
if (!result.IsSuccessful())
{
Log.W(Database.Tag, "Failed to rebuild view " + Name + ": " + result.GetCode());
}
if (Database != null)
{
Database.EndTransaction(result.IsSuccessful());
}
}
}
