| 1 | #Region "Microsoft.VisualBasic::a01ebd5b55b9a07c10fd4c8ee2c3af7c, Microsoft.VisualBasic.Core\ComponentModel\DataStructures\CapacityQueue.vb" |
| 2 | |
| 3 | ' Author: |
| 4 | ' |
| 5 | ' asuka (amethyst.asuka@gcmodeller.org) |
| 6 | ' xie (genetics@smrucc.org) |
| 7 | ' xieguigang (xie.guigang@live.com) |
| 8 | ' |
| 9 | ' Copyright (c) 2018 GPL3 Licensed |
| 10 | ' |
| 11 | ' |
| 12 | ' GNU GENERAL PUBLIC LICENSE (GPL3) |
| 13 | ' |
| 14 | ' |
| 15 | ' This program is free software: you can redistribute it and/or modify |
| 16 | ' it under the terms of the GNU General Public License as published by |
| 17 | ' the Free Software Foundation, either version 3 of the License, or |
| 18 | ' (at your option) any later version. |
| 19 | ' |
| 20 | ' This program is distributed in the hope that it will be useful, |
| 21 | ' but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | ' GNU General Public License for more details. |
| 24 | ' |
| 25 | ' You should have received a copy of the GNU General Public License |
| 26 | ' along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 27 | |
| 28 | |
| 29 | |
| 30 | ' /********************************************************************************/ |
| 31 | |
| 32 | ' Summaries: |
| 33 | |
| 34 | ' Class CapacityQueue |
| 35 | ' |
| 36 | ' Properties: Capacity |
| 37 | ' |
| 38 | ' Constructor: (+1 Overloads) Sub New |
| 39 | ' |
| 40 | ' Function: Enqueue, GetEnumerator, IEnumerable_GetEnumerator, ToString |
| 41 | ' |
| 42 | ' Sub: Clear |
| 43 | ' |
| 44 | ' Operators: + |
| 45 | ' |
| 46 | ' |
| 47 | ' /********************************************************************************/ |
| 48 | |
| 49 | #End Region |
| 50 | |
| 51 | Imports Microsoft.VisualBasic.Serialization.JSON |
| 52 | |
| 53 | Namespace ComponentModel.Collection |
| 54 | |
| 55 | Public Class CapacityQueue(Of T) : Inherits Language.BaseClass |
| 56 | Implements IEnumerable(Of T) |
| 57 | |
| 58 | ReadOnly _queue As Queue(Of T) |
| 59 | |
| 60 | Public ReadOnly Property Capacity As Integer |
| 61 | |
| 62 | ''' <summary> |
| 63 | ''' |
| 64 | ''' </summary> |
| 65 | ''' <param name="capacity">The initial number of elements that the System.Collections.Generic.Queue`1 can |
| 66 | ''' contain.</param> |
| 67 | Sub New(capacity As Integer) |
| 68 | _queue = New Queue(Of T)(capacity) |
| 69 | End Sub |
| 70 | |
| 71 | Public Function Enqueue(x As T) As T |
| 72 | Dim o As T |
| 73 | |
| 74 | Call _queue.Enqueue(x) |
| 75 | |
| 76 | If _queue.Count = Capacity - 1 Then |
| 77 | o = _queue.Dequeue() |
| 78 | Else |
| 79 | o = _queue.Peek |
| 80 | End If |
| 81 | |
| 82 | Return o |
| 83 | End Function |
| 84 | |
| 85 | Public Sub Clear() |
| 86 | Call _queue.Clear() |
| 87 | End Sub |
| 88 | |
| 89 | Public Overrides Function ToString() As String |
| 90 | Return GetType(T()).GetObjectJson(Me.ToArray) |
| 91 | End Function |
| 92 | |
| 93 | Public Overloads Shared Operator +(q As CapacityQueue(Of T), x As T) As CapacityQueue(Of T) |
| 94 | Call q.Enqueue(x) |
| 95 | Return q |
| 96 | End Operator |
| 97 | |
| 98 | Public Iterator Function GetEnumerator() As IEnumerator(Of T) Implements IEnumerable(Of T).GetEnumerator |
| 99 | For Each x As T In _queue |
| 100 | Yield x |
| 101 | Next |
| 102 | End Function |
| 103 | |
| 104 | Private Iterator Function IEnumerable_GetEnumerator() As IEnumerator Implements IEnumerable.GetEnumerator |
| 105 | Yield GetEnumerator() |
| 106 | End Function |
| 107 | End Class |
| 108 | End Namespace |