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BsonDateTime.cs
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BsonDateTime.cs
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/* Copyright 2010-present MongoDB Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using MongoDB.Bson.IO;
using MongoDB.Shared;
namespace MongoDB.Bson
{
/// <summary>
/// Represents a BSON DateTime value.
/// </summary>
[Serializable]
public class BsonDateTime : BsonValue, IComparable<BsonDateTime>, IEquatable<BsonDateTime>
{
// private fields
private readonly long _millisecondsSinceEpoch;
// constructors
/// <summary>
/// Initializes a new instance of the BsonDateTime class.
/// </summary>
/// <param name="value">A DateTime.</param>
public BsonDateTime(DateTime value)
{
_millisecondsSinceEpoch = BsonUtils.ToMillisecondsSinceEpoch(value);
}
/// <summary>
/// Initializes a new instance of the BsonDateTime class.
/// </summary>
/// <param name="millisecondsSinceEpoch">Milliseconds since Unix Epoch.</param>
public BsonDateTime(long millisecondsSinceEpoch)
{
_millisecondsSinceEpoch = millisecondsSinceEpoch;
}
// public properties
/// <summary>
/// Gets the BsonType of this BsonValue.
/// </summary>
public override BsonType BsonType
{
get { return BsonType.DateTime; }
}
/// <summary>
/// Gets whether this BsonDateTime is a valid .NET DateTime.
/// </summary>
public override bool IsValidDateTime
{
get
{
return
_millisecondsSinceEpoch >= BsonConstants.DateTimeMinValueMillisecondsSinceEpoch &&
_millisecondsSinceEpoch <= BsonConstants.DateTimeMaxValueMillisecondsSinceEpoch;
}
}
/// <summary>
/// Gets the number of milliseconds since the Unix Epoch.
/// </summary>
public long MillisecondsSinceEpoch
{
get { return _millisecondsSinceEpoch; }
}
/// <summary>
/// Gets the number of milliseconds since the Unix Epoch.
/// </summary>
[Obsolete("Use MillisecondsSinceEpoch instead.")]
public override object RawValue
{
get { return _millisecondsSinceEpoch; }
}
/// <summary>
/// Gets the DateTime value.
/// </summary>
[Obsolete("Use ToUniversalTime instead.")]
public DateTime Value
{
get
{
return BsonUtils.ToDateTimeFromMillisecondsSinceEpoch(_millisecondsSinceEpoch);
}
}
// public operators
/// <summary>
/// Converts a DateTime to a BsonDateTime.
/// </summary>
/// <param name="value">A DateTime.</param>
/// <returns>A BsonDateTime.</returns>
public static implicit operator BsonDateTime(DateTime value)
{
return new BsonDateTime(value);
}
/// <summary>
/// Compares two BsonDateTime values.
/// </summary>
/// <param name="lhs">The first BsonDateTime.</param>
/// <param name="rhs">The other BsonDateTime.</param>
/// <returns>True if the two BsonDateTime values are not equal according to ==.</returns>
public static bool operator !=(BsonDateTime lhs, BsonDateTime rhs)
{
return !(lhs == rhs);
}
/// <summary>
/// Compares two BsonDateTime values.
/// </summary>
/// <param name="lhs">The first BsonDateTime.</param>
/// <param name="rhs">The other BsonDateTime.</param>
/// <returns>True if the two BsonDateTime values are equal according to ==.</returns>
public static bool operator ==(BsonDateTime lhs, BsonDateTime rhs)
{
if (object.ReferenceEquals(lhs, null)) { return object.ReferenceEquals(rhs, null); }
return lhs.Equals(rhs);
}
// public static methods
/// <summary>
/// Creates a new BsonDateTime.
/// </summary>
/// <param name="value">An object to be mapped to a BsonDateTime.</param>
/// <returns>A BsonDateTime or null.</returns>
public new static BsonDateTime Create(object value)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
return (BsonDateTime)BsonTypeMapper.MapToBsonValue(value, BsonType.DateTime);
}
// public methods
/// <summary>
/// Compares this BsonDateTime to another BsonDateTime.
/// </summary>
/// <param name="other">The other BsonDateTime.</param>
/// <returns>A 32-bit signed integer that indicates whether this BsonDateTime is less than, equal to, or greather than the other.</returns>
public int CompareTo(BsonDateTime other)
{
if (other == null) { return 1; }
return _millisecondsSinceEpoch.CompareTo(other._millisecondsSinceEpoch);
}
/// <summary>
/// Compares the BsonDateTime to another BsonValue.
/// </summary>
/// <param name="other">The other BsonValue.</param>
/// <returns>A 32-bit signed integer that indicates whether this BsonDateTime is less than, equal to, or greather than the other BsonValue.</returns>
public override int CompareTo(BsonValue other)
{
if (other == null) { return 1; }
var otherDateTime = other as BsonDateTime;
if (otherDateTime != null)
{
return _millisecondsSinceEpoch.CompareTo(otherDateTime._millisecondsSinceEpoch);
}
var otherTimestamp = other as BsonTimestamp;
if (otherTimestamp != null)
{
return _millisecondsSinceEpoch.CompareTo(otherTimestamp.Timestamp * 1000L); // timestamp is in seconds
}
return CompareTypeTo(other);
}
/// <summary>
/// Compares this BsonDateTime to another BsonDateTime.
/// </summary>
/// <param name="rhs">The other BsonDateTime.</param>
/// <returns>True if the two BsonDateTime values are equal.</returns>
public bool Equals(BsonDateTime rhs)
{
if (object.ReferenceEquals(rhs, null) || GetType() != rhs.GetType()) { return false; }
return _millisecondsSinceEpoch == rhs._millisecondsSinceEpoch;
}
/// <summary>
/// Compares this BsonDateTime to another object.
/// </summary>
/// <param name="obj">The other object.</param>
/// <returns>True if the other object is a BsonDateTime and equal to this one.</returns>
public override bool Equals(object obj)
{
return Equals(obj as BsonDateTime); // works even if obj is null or of a different type
}
/// <summary>
/// Gets the hash code.
/// </summary>
/// <returns>The hash code.</returns>
public override int GetHashCode()
{
// see Effective Java by Joshua Bloch
int hash = 17;
hash = 37 * hash + Hasher.GetHashCode(BsonType);
hash = 37 * hash + _millisecondsSinceEpoch.GetHashCode();
return hash;
}
/// <summary>
/// Converts this BsonValue to a DateTime in local time.
/// </summary>
/// <returns>A DateTime.</returns>
public override DateTime ToLocalTime()
{
return BsonUtils.ToLocalTime(ToUniversalTime());
}
/// <summary>
/// Converts this BsonValue to a DateTime? in local time.
/// </summary>
/// <returns>A DateTime?.</returns>
public override DateTime? ToNullableLocalTime()
{
return ToLocalTime();
}
/// <summary>
/// Converts this BsonValue to a DateTime? in UTC.
/// </summary>
/// <returns>A DateTime?.</returns>
public override DateTime? ToNullableUniversalTime()
{
return ToUniversalTime();
}
/// <summary>
/// Converts this BsonValue to a DateTime in UTC.
/// </summary>
/// <returns>A DateTime.</returns>
public override DateTime ToUniversalTime()
{
return BsonUtils.ToDateTimeFromMillisecondsSinceEpoch(_millisecondsSinceEpoch);
}
/// <summary>
/// Returns a string representation of the value.
/// </summary>
/// <returns>A string representation of the value.</returns>
public override string ToString()
{
if (IsValidDateTime)
{
return BsonUtils.ToDateTimeFromMillisecondsSinceEpoch(_millisecondsSinceEpoch).ToString("yyyy-MM-ddTHH:mm:ss.FFFFFFFK");
}
else
{
return JsonConvert.ToString(_millisecondsSinceEpoch);
}
}
// protected methods
/// <inheritdoc/>
protected override TypeCode IConvertibleGetTypeCodeImplementation()
{
return TypeCode.DateTime;
}
/// <inheritdoc/>
protected override DateTime IConvertibleToDateTimeImplementation(IFormatProvider provider)
{
return ToUniversalTime();
}
}
}