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266 lines
9.7 KiB
266 lines
9.7 KiB
#Region "Microsoft.VisualBasic::03f99d874addc6e598a646433d613f85, Google.Protobuf\JSON\JsonToken.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Class JsonToken
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'
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' Properties: [False], [True], EndArray, EndDocument, EndObject
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' Null, StartArray, StartObject
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'
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' Function: Name, (+2 Overloads) Value
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' Enum TokenType
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'
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' [False], [True], EndArray, EndDocument, EndObject
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' Name, Null, Number, StartArray, StartObject
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' StringValue
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'
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'
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'
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'
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'
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' Properties: NumberValue, StringValue, Type
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'
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' Constructor: (+1 Overloads) Sub New
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' Function: (+2 Overloads) Equals, GetHashCode, ToString
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'
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'
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' /********************************************************************************/
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#End Region
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#Region "Copyright notice and license"
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' Protocol Buffers - Google's data interchange format
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' Copyright 2008 Google Inc. All rights reserved.
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' https://developers.google.com/protocol-buffers/
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'
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' Redistribution and use in source and binary forms, with or without
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' modification, are permitted provided that the following conditions are
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' met:
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'
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' * Redistributions of source code must retain the above copyright
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' notice, this list of conditions and the following disclaimer.
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' * Redistributions in binary form must reproduce the above
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' copyright notice, this list of conditions and the following disclaimer
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' in the documentation and/or other materials provided with the
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' distribution.
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' * Neither the name of Google Inc. nor the names of its
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' contributors may be used to endorse or promote products derived from
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' this software without specific prior written permission.
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'
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' THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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' "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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' LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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' A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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' OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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' SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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' LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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' DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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' THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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' (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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' OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#End Region
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Imports System
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Namespace Google.Protobuf
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Friend NotInheritable Class JsonToken
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Implements IEquatable(Of JsonToken)
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' Tokens with no value can be reused.
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Private Shared ReadOnly _true As JsonToken = New JsonToken(TokenType.True)
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Private Shared ReadOnly _false As JsonToken = New JsonToken(TokenType.False)
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Private Shared ReadOnly _null As JsonToken = New JsonToken(TokenType.Null)
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Private Shared ReadOnly startObjectField As JsonToken = New JsonToken(TokenType.StartObject)
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Private Shared ReadOnly endObjectField As JsonToken = New JsonToken(TokenType.EndObject)
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Private Shared ReadOnly startArrayField As JsonToken = New JsonToken(TokenType.StartArray)
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Private Shared ReadOnly endArrayField As JsonToken = New JsonToken(TokenType.EndArray)
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Private Shared ReadOnly endDocumentField As JsonToken = New JsonToken(TokenType.EndDocument)
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Friend Shared ReadOnly Property Null As JsonToken
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Get
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Return _null
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End Get
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End Property
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Friend Shared ReadOnly Property [False] As JsonToken
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Get
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Return _false
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End Get
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End Property
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Friend Shared ReadOnly Property [True] As JsonToken
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Get
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Return _true
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End Get
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End Property
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Friend Shared ReadOnly Property StartObject As JsonToken
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Get
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Return startObjectField
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End Get
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End Property
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Friend Shared ReadOnly Property EndObject As JsonToken
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Get
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Return endObjectField
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End Get
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End Property
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Friend Shared ReadOnly Property StartArray As JsonToken
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Get
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Return startArrayField
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End Get
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End Property
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Friend Shared ReadOnly Property EndArray As JsonToken
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Get
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Return endArrayField
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End Get
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End Property
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Friend Shared ReadOnly Property EndDocument As JsonToken
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Get
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Return endDocumentField
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End Get
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End Property
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Friend Shared Function Name(pName As String) As JsonToken
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Return New JsonToken(TokenType.Name, stringValue:=pName)
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End Function
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Friend Shared Function Value(pValue As String) As JsonToken
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Return New JsonToken(TokenType.StringValue, stringValue:=pValue)
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End Function
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Friend Shared Function Value(pValue As Double) As JsonToken
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Return New JsonToken(TokenType.Number, numberValue:=pValue)
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End Function
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Friend Enum TokenType
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Null
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[False]
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[True]
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StringValue
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Number
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Name
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StartObject
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EndObject
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StartArray
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EndArray
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EndDocument
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End Enum
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' A value is a string, number, array, object, null, true or false
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' Arrays and objects have start/end
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' A document consists of a value
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' Objects are name/value sequences.
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Private ReadOnly typeField As TokenType
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Private ReadOnly stringValueField As String
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Private ReadOnly numberValueField As Double
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Friend ReadOnly Property Type As TokenType
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Get
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Return typeField
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End Get
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End Property
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Friend ReadOnly Property StringValue As String
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Get
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Return stringValueField
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End Get
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End Property
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Friend ReadOnly Property NumberValue As Double
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Get
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Return numberValueField
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End Get
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End Property
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Private Sub New(type As TokenType, Optional stringValue As String = Nothing, Optional numberValue As Double = 0)
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typeField = type
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stringValueField = stringValue
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numberValueField = numberValue
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End Sub
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Public Overrides Function Equals(obj As Object) As Boolean
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Return Equals(TryCast(obj, JsonToken))
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End Function
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Public Overrides Function GetHashCode() As Integer
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' BEGIN TODO : Visual Basic does not support checked statements!
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Dim hash = 17
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hash = hash * 31 + typeField
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hash = If(Equals(hash * 31 & stringValueField, Nothing), 0, stringValueField.GetHashCode())
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hash = hash * 31 + numberValueField.GetHashCode()
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Return hash
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'END TODO : Visual Basic does not support checked statements!
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End Function
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Public Overrides Function ToString() As String
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Select Case typeField
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Case TokenType.Null
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Return "null"
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Case TokenType.True
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Return "true"
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Case TokenType.False
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Return "false"
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Case TokenType.Name
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Return "name (" & stringValueField & ")"
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Case TokenType.StringValue
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Return "value (" & stringValueField & ")"
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Case TokenType.Number
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Return "number (" & numberValueField & ")"
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Case TokenType.StartObject
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Return "start-object"
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Case TokenType.EndObject
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Return "end-object"
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Case TokenType.StartArray
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Return "start-array"
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Case TokenType.EndArray
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Return "end-array"
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Case TokenType.EndDocument
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Return "end-document"
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Case Else
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Throw New InvalidOperationException("Token is of unknown type " & typeField)
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End Select
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End Function
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Public Overloads Function Equals(other As JsonToken) As Boolean Implements IEquatable(Of JsonToken).Equals
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If ReferenceEquals(other, Nothing) Then
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Return False
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End If
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' Note use of other.numberValue.Equals rather than ==, so that NaN compares appropriately.
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Return other.typeField = typeField AndAlso Equals(other.stringValueField, stringValueField) AndAlso other.numberValueField.Equals(numberValueField)
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End Function
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End Class
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End Namespace
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