83 lines
3.6 KiB
C#
83 lines
3.6 KiB
C#
using System;
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using System.Linq;
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namespace DTS.Serialization.IRIGCh10.Attributes
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{
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/// <summary>
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/// allows annotating an enum with a value,
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/// see TABLE 10-7. DATA TYPE NAMES AND DESCRIPTIONS in Chapter 10 pdf
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/// </summary>
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[AttributeUsage(AttributeTargets.All)]
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public class PacketHeaderValueAttribute : Attribute
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{
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/// <summary>Specifies the default value for the <see cref="PacketHeaderValueAttribute" />, which is 0x00. This <see langword="static" /> field is read-only.</summary>
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public static readonly PacketHeaderValueAttribute Default = new PacketHeaderValueAttribute();
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private byte _packetHeader;
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/// <summary>Initializes a new instance of the <see cref="PacketHeaderValueAttribute" /> class with no parameters.</summary>
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public PacketHeaderValueAttribute()
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: this(0x00)
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{
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}
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/// <summary>Initializes a new instance of the <see cref="PacketHeaderValueAttribute" /> class with a PacketHeader.</summary>
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/// <param name="packetHeader">packet header value. </param>
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public PacketHeaderValueAttribute(byte packetHeader)
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{
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_packetHeader = packetHeader;
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}
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/// <summary>Gets the packet header value stored in this attribute.</summary>
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/// <returns>The packet header value stored in this attribute.</returns>
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public virtual byte PacketHeader => PacketHeaderValue;
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/// <summary>Gets or sets the byte stored as the packet header value.</summary>
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/// <returns>The byte stored as the packet header version value. The default value is 0x00.</returns>
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protected byte PacketHeaderValue
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{
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get => _packetHeader;
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set => _packetHeader = value;
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}
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/// <summary>Returns whether the value of the given object is equal to the current <see cref="PacketHeaderValueAttribute" />.</summary>
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/// <param name="obj">The object to test the value equality of. </param>
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/// <returns>
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/// <see langword="true" /> if the value of the given object is equal to that of the current; otherwise, <see langword="false" />.</returns>
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public override bool Equals(object obj)
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{
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if (obj == this)
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return true;
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if (obj is PacketHeaderValueAttribute packetHeaderAttribute)
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return packetHeaderAttribute.PacketHeader == PacketHeader;
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return false;
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}
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/// <summary>Returns the hash code for this instance.</summary>
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/// <returns>A 32-bit signed integer hash code.</returns>
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public override int GetHashCode()
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{
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return PacketHeader.GetHashCode();
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}
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/// <summary>Returns a value indicating whether this is the default <see cref="PacketHeaderValueAttribute" /> instance.</summary>
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/// <returns>
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/// <see langword="true" />, if this is the default <see cref="PacketHeaderValueAttribute" /> instance; otherwise, <see langword="false" />.</returns>
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public override bool IsDefaultAttribute()
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{
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return Equals(Default);
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}
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public static byte GetPacketHeaderValue(Enum value)
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{
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var fi = value.GetType().GetField(value.ToString());
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var attributes = (PacketHeaderValueAttribute[])fi.GetCustomAttributes(
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typeof(PacketHeaderValueAttribute), false);
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if (attributes.Any())
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{
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return attributes.First().PacketHeaderValue;
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}
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return Default.PacketHeaderValue;
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}
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}
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}
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