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

//
// OracleBoolean.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 OracleBoolean : IComparable
  {
    #region Fields

    public static readonly OracleBoolean False = new OracleBoolean (false);
    public static readonly OracleBoolean Null = new OracleBoolean ();
    public static readonly OracleBoolean One = new OracleBoolean (1);
    public static readonly OracleBoolean True = new OracleBoolean (true);
    public static readonly OracleBoolean Zero = new OracleBoolean (0);

    bool value;
    bool notNull;

    #endregion // Fields

    #region Constructors

    public OracleBoolean (bool value)
    {
      this.value = value;
      notNull = true;
    }

    public OracleBoolean (int value)
      : this (value != 0)
    {
    }

    #endregion // Constructors

    #region Properties

    public bool IsFalse {
      get { return (!IsNull && !value); }
    }

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

    public bool IsTrue {
      get { return (!IsNull && value); }
    }

    public bool Value {
      get { return IsTrue; }
    }

    #endregion // Properties

    #region Methods

    public static OracleBoolean And (OracleBoolean x, OracleBoolean y)
    {
      if (x.IsNull || y.IsNull) 
        return OracleBoolean.Null;
      return new OracleBoolean (x.Value && y.Value);
    }

    [MonoTODO]
    public int CompareTo (object obj)
    {
      throw new NotImplementedException ();
    }

    [MonoTODO]
    public override bool Equals (object value)
    {
      throw new NotImplementedException ();
    }

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

    public static OracleBoolean OnesComplement (OracleBoolean x)
    {
      if (x.IsNull)
        return OracleBoolean.Null;
      return new OracleBoolean (!x.Value);
    }

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

    [MonoTODO]
    public static OracleBoolean Parse (string s)
    {
      throw new NotImplementedException ();
    }

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

      if (IsTrue)
        return "True";

      return "False";
    }

    public static OracleBoolean Xor (OracleBoolean x, OracleBoolean y)
    {
      if (x.IsNull || y.IsNull)
        return OracleBoolean.Null;
      return new OracleBoolean (x.Value ^ y.Value);
    }

    #endregion // Methods

    #region Operators and Type Conversions

    public static OracleBoolean operator & (OracleBoolean x, OracleBoolean y)
    {
      return And (x, y);
    }

    public static OracleBoolean operator | (OracleBoolean x, OracleBoolean y)
    {
      return Or (x, y);
    }

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

    public static OracleBoolean operator ^ (OracleBoolean x, OracleBoolean y)
    {
      return Xor (x, y);
    }

    public static bool operator false (OracleBoolean x)
    {
      return x.IsFalse; 
    }

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

    public static OracleBoolean operator ! (OracleBoolean x)
    {
      return OnesComplement (x);
    }

    public static OracleBoolean operator ~ (OracleBoolean x)
    {
      return OnesComplement (x);
    }

    public static bool operator true (OracleBoolean x)
    {
      return x.IsTrue;
    }

    public static explicit operator bool (OracleBoolean x)
    {
      if (x.IsNull)
        throw new NullReferenceException ();
      return x.Value;
    }
      
    public static explicit operator OracleBoolean (OracleNumber x)
    {
      return new OracleBoolean ((int) x);
    }

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

    public static implicit operator OracleBoolean (bool x)
    {
      return new OracleBoolean (x);
    }

    #endregion // Operators and Type Conversions
  }
}