public IEnumerable <KeyValuePair <byte[], byte[]> > Find(string indexName, byte[] lookupValue) // Find the specified indexName and lookupValue.
{
KeyValueStore indexStore = GetSecondaryIndex(indexName);
foreach (var pair in indexStore.EnumerateFromKey(lookupValue)) // Loop over the values
{
var key = pair.Key;
var value = pair.Value;
// construct our index key pattern (lookupvalue | key), then lookup the value of the actual object using the key that was found; if the previous condition was not met, then we must have enumerated past the end of the indexed value
if (ByteArray.CompareMemCmp(key, 0, lookupValue, 0, lookupValue.Length) == 0)
{
if (key.Length == (value.Length + lookupValue.Length) && ByteArray.CompareMemCmp(key, lookupValue.Length, value, 0, value.Length) == 0)
{
if (Get(value) != null)
{
yield return(new KeyValuePair <byte[], byte[]> (value, Get(value)));
}
else
{
yield break;
}
}
}
}
}
public IEnumerable <KeyValuePair <byte[], byte[]> > FindStartsWith(string indexName, byte[] lookupValue)
{
KeyValueStore indexStore = GetSecondaryIndex(indexName);
foreach (var pair in indexStore.EnumerateFromKey(lookupValue)) // Loops over the values.
{
var key = pair.Key;
var value = pair.Value;
// Constructs the index key pattern (lookupvalue | key), then looks up the value of the actual object using the discovered key: If the previous condition was not met, then we must have enumerated past the end of the indexed value.
if (ByteArray.CompareMemCmp(key, 0, lookupValue, 0, lookupValue.Length) == 0)
{
if (key.Length >= (value.Length + lookupValue.Length))
{
if (Get(value) != null)
{
yield return(new KeyValuePair <byte[], byte[]> (value, Get(value)));
}
else
{
yield break;
}
}
}
}
}
public void RemoveIndexRangeForValue(string indexName, byte[] startAt, byte[] value)
{
KeyValueStore indexStore = GetSecondaryIndex(indexName);
var pairs = indexStore.EnumerateFromKey(startAt);
foreach (var pair in pairs)
{
if (ByteArray.CompareMemCmp(pair.Value, value) == 0)
{
indexStore.Delete(pair.Key);
}
if (ByteArray.CompareMemCmp(startAt, 0, pair.Key, 0, startAt.Length) == 0)
{
continue; // Exit index removal only when the projectID in the index key changes.
}
break;
}
}
