/
DateTimeNode.cs
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/
DateTimeNode.cs
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/*
// <copyright>
// dotNetRDF is free and open source software licensed under the MIT License
// -------------------------------------------------------------------------
//
// Copyright (c) 2009-2023 dotNetRDF Project (http://dotnetrdf.org/)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is furnished
// to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// </copyright>
*/
using System;
using System.Globalization;
using VDS.RDF.Parsing;
using VDS.RDF.Query;
using VDS.RDF.Query.Expressions;
namespace VDS.RDF.Nodes
{
/// <summary>
/// Valued Node representing a Date Time value.
/// </summary>
public class DateTimeNode
: LiteralNode, IValuedNode
{
private DateTime _value;
private DateTimeOffset? _offsetValue;
/// <summary>
/// Creates a new Date Time valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
/// <param name="lexicalValue">Lexical Value.</param>
/// <param name="datatype">Datatype URI.</param>
/// <param name="normalizeLiteralValue">Whether to perform unicode normalization on <paramref name="lexicalValue"/>.</param>
protected DateTimeNode(DateTimeOffset value, string lexicalValue, Uri datatype, bool normalizeLiteralValue = false)
: base(lexicalValue, datatype, normalizeLiteralValue)
{
_value = value.UtcDateTime;
_offsetValue = value;
}
/// <summary>
/// Creates a new Date Time valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
/// <param name="lexicalValue">Lexical Value.</param>
/// <param name="datatype">Datatype URI.</param>
/// <param name="normalizeLiteralValue">Whether to perform unicode normalization on <paramref name="lexicalValue"/>.</param>
protected DateTimeNode(DateTime value, string lexicalValue, Uri datatype, bool normalizeLiteralValue = false)
: base(lexicalValue, datatype, normalizeLiteralValue)
{
_value = value;
_offsetValue = null;
}
/// <summary>
/// Creates a new Date Time valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
/// <param name="datatype">Datatype URI.</param>
protected DateTimeNode(DateTimeOffset value, Uri datatype)
: this(value, GetStringForm(value, datatype), datatype) { }
/// <summary>
/// Creates a new Date Time valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
/// <param name="datatype">Datatype URI.</param>
protected DateTimeNode(DateTime value, Uri datatype)
: this(value, GetStringForm(value, datatype), datatype) { }
/// <summary>
/// Creates a new Date Time valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
public DateTimeNode(DateTimeOffset value)
: this(value, UriFactory.Root.Create(XmlSpecsHelper.XmlSchemaDataTypeDateTime)) { }
/// <summary>
/// Creates a new Date Time valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
public DateTimeNode(DateTime value)
: this(value, UriFactory.Root.Create(XmlSpecsHelper.XmlSchemaDataTypeDateTime)) { }
/// <summary>
/// Creates a new Date Time valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
/// <param name="lexicalValue">Lexical Value.</param>
/// <param name="normalizeLiteralValue">Whether to perform unicode normalization on <paramref name="lexicalValue"/>.</param>
public DateTimeNode(DateTimeOffset value, string lexicalValue, bool normalizeLiteralValue = false)
: this(value, lexicalValue, UriFactory.Root.Create(XmlSpecsHelper.XmlSchemaDataTypeDateTime), normalizeLiteralValue) { }
/// <summary>
/// Creates a new Date Time valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
/// <param name="lexicalValue">Lexical Value.</param>
/// <param name="normalizeLiteralValue">Whether to perform unicode normalization on <paramref name="lexicalValue"/>.</param>
public DateTimeNode(DateTime value, string lexicalValue, bool normalizeLiteralValue = false)
: this(value, lexicalValue, UriFactory.Root.Create(XmlSpecsHelper.XmlSchemaDataTypeDateTime), normalizeLiteralValue) { }
/// <summary>
/// Creates a new Date Time valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
/// <param name="offsetValue">Date Time offset value.</param>
/// <param name="lexicalValue">Lexical Value.</param>
/// <param name="normalizeLiteralValue">Whether to perform unicode normalization on <paramref name="lexicalValue"/>.</param>
public DateTimeNode(DateTime value, DateTimeOffset offsetValue, string lexicalValue, bool normalizeLiteralValue = false)
: this(value, offsetValue, lexicalValue, UriFactory.Root.Create(XmlSpecsHelper.XmlSchemaDataTypeDateTime), normalizeLiteralValue) { }
/// <summary>
/// Creates a new Date Time valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
/// <param name="offsetValue">Date Time offset value.</param>
/// <param name="lexicalValue">Lexical Value.</param>
/// <param name="datatype">Data Type URI.</param>
/// <param name="normalizeLiteralValue">Whether to perform unicode normalization on <paramref name="lexicalValue"/>.</param>
public DateTimeNode(DateTime value, DateTimeOffset offsetValue, string lexicalValue, Uri datatype, bool normalizeLiteralValue = false)
: base(lexicalValue, datatype, normalizeLiteralValue)
{
_value = value;
_offsetValue = offsetValue;
}
/// <summary>
/// Gets the String form of the Date Time.
/// </summary>
/// <param name="value">Value.</param>
/// <param name="datatype">Datatype URI.</param>
/// <returns></returns>
private static string GetStringForm(DateTimeOffset value, Uri datatype)
{
switch (datatype.ToString())
{
case XmlSpecsHelper.XmlSchemaDataTypeDateTime:
return value.ToString(XmlSpecsHelper.XmlSchemaDateTimeFormat);
case XmlSpecsHelper.XmlSchemaDataTypeDate:
return value.ToString(XmlSpecsHelper.XmlSchemaDateFormat);
default:
throw new RdfQueryException("Unable to create a DateTimeNode because datatype URI is invalid");
}
}
/// <summary>
/// Gets the String form of the Date Time.
/// </summary>
/// <param name="value">Value.</param>
/// <param name="datatype">Datatype URI.</param>
/// <returns></returns>
private static string GetStringForm(DateTime value, Uri datatype)
{
switch (datatype.ToString())
{
case XmlSpecsHelper.XmlSchemaDataTypeDateTime:
return value.ToString(XmlSpecsHelper.XmlSchemaDateTimeFormat);
case XmlSpecsHelper.XmlSchemaDataTypeDate:
return value.ToString(XmlSpecsHelper.XmlSchemaDateFormat);
default:
throw new RdfQueryException("Unable to create a DateTimeNode because datatype URI is invalid");
}
}
/// <summary>
/// Gets the date time value as a string.
/// </summary>
/// <returns></returns>
public string AsString()
{
return Value;
}
/// <summary>
/// Throws an error as date times cannot be converted to integers.
/// </summary>
/// <returns></returns>
public long AsInteger()
{
throw new RdfQueryException("Cannot convert Date Times to other types");
}
/// <summary>
/// Throws an error as date times cannot be converted to decimals.
/// </summary>
/// <returns></returns>
public decimal AsDecimal()
{
throw new RdfQueryException("Cannot convert Date Times to other types");
}
/// <summary>
/// Throws an error as date times cannot be converted to floats.
/// </summary>
/// <returns></returns>
public float AsFloat()
{
throw new RdfQueryException("Cannot convert Date Times to other types");
}
/// <summary>
/// Throws an error as date times cannot be converted to doubles.
/// </summary>
/// <returns></returns>
public double AsDouble()
{
throw new RdfQueryException("Cannot convert Date Times to other types");
}
/// <summary>
/// Throws an error as date times cannot be converted to booleans.
/// </summary>
/// <returns></returns>
public bool AsBoolean()
{
throw new RdfQueryException("Cannot convert Date Times to other types");
}
/// <summary>
/// Gets the date time value of the node.
/// </summary>
/// <returns></returns>
public DateTime AsDateTime()
{
return _value;
}
/// <summary>
/// Gets the date time value of the node.
/// </summary>
/// <returns></returns>
public DateTimeOffset AsDateTimeOffset()
{
if (_offsetValue.HasValue)
{
return _offsetValue.Value;
}
else
{
// Create the offset
_offsetValue = DateTimeOffset.TryParse(Value, null, DateTimeStyles.AssumeUniversal, out DateTimeOffset offset)
? offset
: new DateTimeOffset(_value);
return _offsetValue.Value;
}
}
/// <summary>
/// Throws an error as date times cannot be cast to a time span.
/// </summary>
/// <returns></returns>
public TimeSpan AsTimeSpan()
{
throw new RdfQueryException("Cannot convert Date Times to other types");
}
/// <summary>
/// Gets the URI of the datatype this valued node represents as a String.
/// </summary>
public string EffectiveType
{
get
{
return DataType.AbsoluteUri;
}
}
/// <summary>
/// Gets the numeric type of the node.
/// </summary>
public SparqlNumericType NumericType
{
get
{
return SparqlNumericType.NaN;
}
}
}
/// <summary>
/// Valued Node representing a Date value.
/// </summary>
public class DateNode
: DateTimeNode
{
/// <summary>
/// Creates a new Date valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
public DateNode(DateTimeOffset value)
: base(value, UriFactory.Root.Create(XmlSpecsHelper.XmlSchemaDataTypeDate)) { }
/// <summary>
/// Creates a new Date valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
/// <param name="lexicalValue">Lexical Value.</param>
public DateNode(DateTimeOffset value, string lexicalValue)
: base(value, lexicalValue, UriFactory.Root.Create(XmlSpecsHelper.XmlSchemaDataTypeDate)) { }
/// <summary>
/// Creates a new Date valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
public DateNode(DateTime value)
: base(value, UriFactory.Root.Create(XmlSpecsHelper.XmlSchemaDataTypeDate)) { }
/// <summary>
/// Creates a new Date valued node.
/// </summary>
/// <param name="value">Date Time value.</param>
/// <param name="lexicalValue">Lexical Value.</param>
public DateNode(DateTime value, string lexicalValue)
: base(value, UriFactory.Root.Create(XmlSpecsHelper.XmlSchemaDataTypeDate)) { }
}
}