public AdvancedEnumerator(ODBSet <TKey> owner, AdvancedEnumeratorParam <TKey> param) { _owner = owner; _keyValueTr = _owner._keyValueTr; _ascending = param.Order == EnumerationOrder.Ascending; _prevModificationCounter = _owner._modificationCounter; _prevProtectionCounter = _keyValueTr.CursorMovedCounter; _keyValueTr.FindFirstKey(_owner._prefix); var prefixIndex = _keyValueTr.GetKeyIndex(); long startIndex; long endIndex; if (param.EndProposition == KeyProposition.Ignored) { _keyValueTr.FindLastKey(_owner._prefix); endIndex = _keyValueTr.GetKeyIndex() - prefixIndex - 1; } else { var keyBytes = _owner.KeyToByteArray(param.End); switch (_keyValueTr.Find(keyBytes, (uint)_owner._prefix.Length)) { case FindResult.Exact: endIndex = _keyValueTr.GetKeyIndex() - prefixIndex; if (param.EndProposition == KeyProposition.Excluded) { endIndex--; } break; case FindResult.Previous: endIndex = _keyValueTr.GetKeyIndex() - prefixIndex; break; case FindResult.Next: endIndex = _keyValueTr.GetKeyIndex() - prefixIndex - 1; break; case FindResult.NotFound: endIndex = -1; break; default: throw new ArgumentOutOfRangeException(); } } if (param.StartProposition == KeyProposition.Ignored) { startIndex = 0; } else { var keyBytes = _owner.KeyToByteArray(param.Start); switch (_keyValueTr.Find(keyBytes, (uint)_owner._prefix.Length)) { case FindResult.Exact: startIndex = _keyValueTr.GetKeyIndex() - prefixIndex; if (param.StartProposition == KeyProposition.Excluded) { startIndex++; } break; case FindResult.Previous: startIndex = _keyValueTr.GetKeyIndex() - prefixIndex + 1; break; case FindResult.Next: startIndex = _keyValueTr.GetKeyIndex() - prefixIndex; break; case FindResult.NotFound: startIndex = 0; break; default: throw new ArgumentOutOfRangeException(); } } _count = (uint)Math.Max(0, endIndex - startIndex + 1); _startPos = (uint)(_ascending ? startIndex : endIndex); _pos = 0; _seekState = SeekState.Undefined; }
public IEnumerable <TKey> GetAdvancedEnumerator(AdvancedEnumeratorParam <TKey> param) { return(new AdvancedEnumerator(this, param)); }
public long RemoveRange(AdvancedEnumeratorParam <TKey> param) { _modificationCounter++; _keyValueTr.FindFirstKey(_prefix); var prefixIndex = _keyValueTr.GetKeyIndex(); long startIndex; long endIndex; if (param.EndProposition == KeyProposition.Ignored) { _keyValueTr.FindLastKey(_prefix); endIndex = _keyValueTr.GetKeyIndex() - prefixIndex - 1; } else { var keyBytes = KeyToByteArray(param.End); switch (_keyValueTr.Find(keyBytes, (uint)_prefix.Length)) { case FindResult.Exact: endIndex = _keyValueTr.GetKeyIndex() - prefixIndex; if (param.EndProposition == KeyProposition.Excluded) { endIndex--; } break; case FindResult.Previous: endIndex = _keyValueTr.GetKeyIndex() - prefixIndex; break; case FindResult.Next: endIndex = _keyValueTr.GetKeyIndex() - prefixIndex - 1; break; case FindResult.NotFound: endIndex = -1; break; default: throw new ArgumentOutOfRangeException(); } } if (param.StartProposition == KeyProposition.Ignored) { startIndex = 0; } else { var keyBytes = KeyToByteArray(param.Start); switch (_keyValueTr.Find(keyBytes, (uint)_prefix.Length)) { case FindResult.Exact: startIndex = _keyValueTr.GetKeyIndex() - prefixIndex; if (param.StartProposition == KeyProposition.Excluded) { startIndex++; } break; case FindResult.Previous: startIndex = _keyValueTr.GetKeyIndex() - prefixIndex + 1; break; case FindResult.Next: startIndex = _keyValueTr.GetKeyIndex() - prefixIndex; break; case FindResult.NotFound: startIndex = 0; break; default: throw new ArgumentOutOfRangeException(); } } _keyValueTr.EraseRange(prefixIndex + startIndex, prefixIndex + endIndex); _count = -1; return(Math.Max(0, endIndex - startIndex + 1)); }
public IOrderedDictionaryEnumerator <TKey, TValue> GetAdvancedEnumerator(AdvancedEnumeratorParam <TKey> param) { return(new AdvancedEnumerator <TKey, TValue>(this, param)); }
public IEnumerable <T> GetAdvancedEnumerator(AdvancedEnumeratorParam <T> param) { throw new System.NotSupportedException(); }
public long RemoveRange(AdvancedEnumeratorParam <T> param) { throw new System.NotSupportedException(); }
public AdvancedEnumerator(ODBDictionary <TKey, TValue> owner, AdvancedEnumeratorParam <TKey> param) { _owner = owner; _keyValueTrProtector = _owner._keyValueTrProtector; _keyValueTr = _owner._keyValueTr; _ascending = param.Order == EnumerationOrder.Ascending; _keyValueTrProtector.Start(); _prevModificationCounter = _owner._modificationCounter; _prevProtectionCounter = _keyValueTrProtector.ProtectionCounter; _keyValueTr.SetKeyPrefix(_owner._prefix); long startIndex; long endIndex; if (param.EndProposition == KeyProposition.Ignored) { endIndex = _keyValueTr.GetKeyValueCount() - 1; } else { var keyBytes = _owner.KeyToByteArray(param.End); switch (_keyValueTr.Find(ByteBuffer.NewSync(keyBytes))) { case FindResult.Exact: endIndex = _keyValueTr.GetKeyIndex(); if (param.EndProposition == KeyProposition.Excluded) { endIndex--; } break; case FindResult.Previous: endIndex = _keyValueTr.GetKeyIndex(); break; case FindResult.Next: endIndex = _keyValueTr.GetKeyIndex() - 1; break; case FindResult.NotFound: endIndex = -1; break; default: throw new ArgumentOutOfRangeException(); } } if (param.StartProposition == KeyProposition.Ignored) { startIndex = 0; } else { var keyBytes = _owner.KeyToByteArray(param.Start); switch (_keyValueTr.Find(ByteBuffer.NewSync(keyBytes))) { case FindResult.Exact: startIndex = _keyValueTr.GetKeyIndex(); if (param.StartProposition == KeyProposition.Excluded) { startIndex++; } break; case FindResult.Previous: startIndex = _keyValueTr.GetKeyIndex() + 1; break; case FindResult.Next: startIndex = _keyValueTr.GetKeyIndex(); break; case FindResult.NotFound: startIndex = 0; break; default: throw new ArgumentOutOfRangeException(); } } _count = (uint)Math.Max(0, endIndex - startIndex + 1); _startPos = (uint)(_ascending ? startIndex : endIndex); _pos = 0; _seekNeeded = true; }