OracleMonthSpan.cs :  » 2.6.4-mono-.net-core » System.Data » System » Data » OracleClient » C# / CSharp Open Source

//
// OracleMonthSpan.cs 
//
// Part of the Mono class libraries at
// mcs/class/System.Data.OracleClient/System.Data.OracleClient
//
// Assembly: System.Data.OracleClient.dll
// Namespace: System.Data.OracleClient
//
// Author: Tim Coleman <tim@timcoleman.com>
//
// Copyright (C) Tim Coleman, 2003
//
// Licensed under the MIT/X11 License.
//

using System;
using System.Data.SqlTypes;

namespace System.Data.OracleClient{
  public struct OracleMonthSpan : IComparable, INullable
  {
    #region Fields

    public static readonly OracleMonthSpan MaxValue = new OracleMonthSpan (176556);
    public static readonly OracleMonthSpan MinValue = new OracleMonthSpan (-176556);
    public static readonly OracleMonthSpan Null = new OracleMonthSpan ();

    bool notNull; 
    int value;

    #endregion // Fields

    #region Constructors

    public OracleMonthSpan (int months)
    {
      value = months;
      notNull = true;
    }

    public OracleMonthSpan (OracleMonthSpan from)
    {
      this.notNull = from.notNull;
      this.value = from.value;
    }

    public OracleMonthSpan (int years, int months)
      : this (years * 12 + months)
    {
    }

    #endregion // Constructors

    #region Properties

    public bool IsNull {
      get { return !notNull; }
    }

    public int Value {
      get {
        if (IsNull)
          throw new Exception ("Data is null.");

        return value;
      }
    }

    #endregion // Properties

    #region Methods

    public int CompareTo (object obj)
    {
      OracleMonthSpan o = (OracleMonthSpan) obj;
      if (obj == null)
        throw new NullReferenceException ("Object reference not set to an instance of an object");
      else if (!(obj is OracleMonthSpan))
        throw new ArgumentException ("Value is not a System.Data.OracleClient.OracleMonthSpan", obj.ToString ());
      else if (o.IsNull && this.IsNull)
        return 0;
      else if (o.IsNull && !(this.IsNull))
        return 1;
      else
        return value.CompareTo (o.Value);
    }

    public override bool Equals (object value)
    {
      if (value is OracleMonthSpan) {
        OracleMonthSpan m = (OracleMonthSpan) value;
        return this.value == m.value;
      }
      return false;
    }

    public static OracleBoolean Equals (OracleMonthSpan x, OracleMonthSpan y)
    {
      if (x.IsNull || y.IsNull)
        return OracleBoolean.Null;
      return new OracleBoolean (x.Value == y.Value);
    }

    [MonoTODO]
    public override int GetHashCode ()
    {
      throw new NotImplementedException ();
    }

    public static OracleBoolean GreaterThan (OracleMonthSpan x, OracleMonthSpan y)
    {
      if (x.IsNull || y.IsNull)
        return OracleBoolean.Null;
      return (x.value > y.value);
    }

    public static OracleBoolean GreaterThanOrEqual (OracleMonthSpan x, OracleMonthSpan y)
    {
      if (x.IsNull || y.IsNull)
        return OracleBoolean.Null;
      return (x.value >= y.value);
    }

    public static OracleBoolean LessThan (OracleMonthSpan x, OracleMonthSpan y)
    {
      if (x.IsNull || y.IsNull)
        return OracleBoolean.Null;
      return (x.value < y.value);
    }

    public static OracleBoolean LessThanOrEqual (OracleMonthSpan x, OracleMonthSpan y)
    {
      if (x.IsNull || y.IsNull)
        return OracleBoolean.Null;
      return (x.value <= y.value);
    }

    public static OracleBoolean NotEquals (OracleMonthSpan x, OracleMonthSpan y)
    {
      if (x.IsNull || y.IsNull)
        return OracleBoolean.Null;
      return (x.value != y.value);
    }
    
    public static OracleMonthSpan Parse (string s)
    {
      return new OracleMonthSpan (Int32.Parse (s));
    }

    public override string ToString ()
    {
      if (IsNull)
        return "Null";
      return value.ToString ();
    }

    #endregion // Methods

    #region Operators and Type Conversions

    public static OracleBoolean operator == (OracleMonthSpan x, OracleMonthSpan y)
    {
      return Equals (x, y);
    }

    public static OracleBoolean operator > (OracleMonthSpan x, OracleMonthSpan y)
    {
      return GreaterThan (x, y);
    }

    public static OracleBoolean operator >= (OracleMonthSpan x, OracleMonthSpan y)
    {
      return GreaterThanOrEqual (x, y);
    }

    public static OracleBoolean operator != (OracleMonthSpan x, OracleMonthSpan y)
    {
      return NotEquals (x, y);
    }

    public static OracleBoolean operator < (OracleMonthSpan x, OracleMonthSpan y)
    {
      return LessThan (x, y);
    }

    public static OracleBoolean operator <= (OracleMonthSpan x, OracleMonthSpan y)
    {
      return LessThan (x, y);
    }

    public static explicit operator int (OracleMonthSpan x)
    {
      return x.value;
    }

    public static explicit operator OracleMonthSpan (string x)
    {
      return Parse (x);
    }

    #endregion // Operators and Type Conversions
  }
}