OracleBoolean.cs source code in C# .NET

                        
Code:
                         / Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / DataOracleClient / System / Data / OracleClient / OracleBoolean.cs / 1 / OracleBoolean.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
namespace System.Data.OracleClient 
{
    using System; 
    using System.Data.Common;
    using System.Diagnostics;
    using System.Runtime.InteropServices;
    using System.Globalization; 

    //--------------------------------------------------------------------- 
    // OracleBoolean 
    //
    //  This class implements support for comparisons of other Oracle type 
    //  classes that may be null; there is no Boolean data type in oracle
    //  that this maps too; it's merely a convenience class.
    //
    [StructLayout(LayoutKind.Sequential)] 
    public struct OracleBoolean : IComparable {
 
        private byte _value;        // value: 1 (true), 2 (false), 0 (unknown/Null) (see below) 

        private const byte x_Null   = 0; 
        private const byte x_True   = 1;
        private const byte x_False  = 2;

        public static readonly OracleBoolean False = new OracleBoolean(false); 

        public static readonly OracleBoolean Null = new OracleBoolean(0, true); 
 
        public static readonly OracleBoolean One = new OracleBoolean(1);
 
        public static readonly OracleBoolean True = new OracleBoolean(true);

        public static readonly OracleBoolean Zero = new OracleBoolean(0);
 

        // Construct a non-null boolean from a boolean value 
        public OracleBoolean(bool value) { 
            this._value = (byte)(value ? x_True : x_False);
        } 

        // Construct a non-null boolean from a specific value
        public OracleBoolean(int value) : this(value, false) {}
 
        // Construct a potentially null boolean from a specific value
        private OracleBoolean(int value, bool isNull) { 
            if (isNull) { 
                this._value = x_Null;
            } 
            else {
                this._value = (value != 0) ? x_True : x_False;
            }
        } 

        private byte ByteValue { 
            get { 
                return _value;
            } 
        }

        public bool IsFalse {
            get { 
                return _value == x_False;
            } 
        } 

        public bool IsNull { 
            get {
                return _value == x_Null;
            }
        } 

        public bool IsTrue { 
            get { 
                return _value == x_True;
            } 
        }

        public bool Value {
            get { 
                switch (_value) {
                case x_True: 
                    return true; 

                case x_False: 
                    return false;

                default:
                    throw ADP.DataIsNull(); 
                }
            } 
        } 

 
        public int CompareTo( object obj ) {
            if (obj is OracleBoolean) {
                OracleBoolean i = (OracleBoolean)obj;
 
                // If both Null, consider them equal.
                // Otherwise, Null is less than anything. 
                if (IsNull) { 
                    return i.IsNull ? 0  : -1;
                } 
                else if (i.IsNull) {
                    return 1;
                }
 
                if (this.ByteValue < i.ByteValue) { return -1; }
                if (this.ByteValue > i.ByteValue) { return 1; } 
                return 0; 
            }
            throw ADP.WrongType(obj.GetType(), typeof(OracleBoolean)); 
        }

        public override bool Equals(object value) {
            if (value is OracleBoolean) { 
                OracleBoolean i = (OracleBoolean)value;
 
                if (i.IsNull || IsNull) { 
                    return (i.IsNull && IsNull);
                } 
                else {
                    return (this == i).Value;
                }
            } 
            return false;
       } 
 
        public override int GetHashCode() {
            return IsNull ? 0 : _value.GetHashCode(); 
        }

        public static OracleBoolean Parse(string s) {
            OracleBoolean ret; 
            try {
                ret = new OracleBoolean(Int32.Parse(s, CultureInfo.InvariantCulture)); 
            } 
            catch (Exception e) {
                Type type = e.GetType(); 
                if ( (type == ADP.ArgumentNullExceptionType) ||
                     (type == ADP.FormatExceptionType)       ||
                     (type == ADP.OverflowExceptionType) ) {
                    ret = new OracleBoolean(Boolean.Parse(s)); 
                }
                else { 
                    throw e; 
                }
            } 
            return ret;
        }

        public override string ToString() { 
            if (IsNull) {
                return ADP.NullString; 
            } 
            return Value.ToString(CultureInfo.CurrentCulture);
        } 


        public static OracleBoolean And(OracleBoolean x, OracleBoolean y) {
            // Alternative method for operator & 
            return (x & y);
        } 
 
        public static OracleBoolean Equals(OracleBoolean x, OracleBoolean y) {
            // Alternative method for operator == 
            return (x == y);
        }

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

        public static OracleBoolean OnesComplement(OracleBoolean x) { 
            // Alternative method for operator ~
            return (~x);
        }
 
        public static OracleBoolean Or(OracleBoolean x, OracleBoolean y) {
            // Alternative method for operator | 
            return (x | y); 
        }
 
        public static OracleBoolean Xor(OracleBoolean x, OracleBoolean y) {
            // Alternative method for operator ^
            return (x ^ y);
        } 

        public static implicit operator OracleBoolean(bool x) { 
            // Implicit conversion from bool to OracleBoolean 
            return new OracleBoolean(x);
        } 

        public static explicit operator OracleBoolean(string x) {
            // Explicit conversion from string to OracleBoolean
            return OracleBoolean.Parse(x); 
        }
 
        public static explicit operator OracleBoolean(OracleNumber x) { 
            // Explicit conversion from OracleNumber to OracleBoolean
            return x.IsNull ? Null : new OracleBoolean(x.Value != Decimal.Zero); 
        }

        public static explicit operator bool(OracleBoolean x) {
            // Explicit conversion from OracleBoolean to bool. Throw exception if x is Null. 
            return x.Value;
        } 
 

        //--------------------------------------------------------------------- 
        // Unary operators
        //----------------------------------------------------------------------

        public static OracleBoolean operator!   (OracleBoolean x) { 
            switch (x._value) {
                case x_True: 
                    return OracleBoolean.False; 

                case x_False: 
                    return OracleBoolean.True;

                default:
                    Debug.Assert(x._value == x_Null); 
                    return OracleBoolean.Null;
            } 
        } 

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

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


        //--------------------------------------------------------------------- 
        // Binary operators
        //---------------------------------------------------------------------- 
 
        public static OracleBoolean operator&   (OracleBoolean x, OracleBoolean y) {
            if (x._value == x_False || y._value == x_False) { 
                return OracleBoolean.False;
            }
            else if (x._value == x_True && y._value == x_True) {
                return OracleBoolean.True; 
            }
            else { 
                return OracleBoolean.Null; 
            }
        } 

        public static OracleBoolean operator==  (OracleBoolean x, OracleBoolean y) {
            return(x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x._value == y._value);
        } 

        public static OracleBoolean operator!=  (OracleBoolean x, OracleBoolean y) { 
            return ! (x == y); 
        }
 
        public static OracleBoolean operator|   (OracleBoolean x, OracleBoolean y) {
            if (x._value == x_True || y._value == x_True) {
                return OracleBoolean.True;
            } 
            else if (x._value == x_False && y._value == x_False) {
                return OracleBoolean.False; 
            } 
            else {
                return OracleBoolean.Null; 
            }
        }

        public static OracleBoolean operator^   (OracleBoolean x, OracleBoolean y) { 
            return(x.IsNull || y.IsNull) ? Null : new OracleBoolean(x._value != y._value);
        } 
 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
namespace System.Data.OracleClient 
{
    using System; 
    using System.Data.Common;
    using System.Diagnostics;
    using System.Runtime.InteropServices;
    using System.Globalization; 

    //--------------------------------------------------------------------- 
    // OracleBoolean 
    //
    //  This class implements support for comparisons of other Oracle type 
    //  classes that may be null; there is no Boolean data type in oracle
    //  that this maps too; it's merely a convenience class.
    //
    [StructLayout(LayoutKind.Sequential)] 
    public struct OracleBoolean : IComparable {
 
        private byte _value;        // value: 1 (true), 2 (false), 0 (unknown/Null) (see below) 

        private const byte x_Null   = 0; 
        private const byte x_True   = 1;
        private const byte x_False  = 2;

        public static readonly OracleBoolean False = new OracleBoolean(false); 

        public static readonly OracleBoolean Null = new OracleBoolean(0, true); 
 
        public static readonly OracleBoolean One = new OracleBoolean(1);
 
        public static readonly OracleBoolean True = new OracleBoolean(true);

        public static readonly OracleBoolean Zero = new OracleBoolean(0);
 

        // Construct a non-null boolean from a boolean value 
        public OracleBoolean(bool value) { 
            this._value = (byte)(value ? x_True : x_False);
        } 

        // Construct a non-null boolean from a specific value
        public OracleBoolean(int value) : this(value, false) {}
 
        // Construct a potentially null boolean from a specific value
        private OracleBoolean(int value, bool isNull) { 
            if (isNull) { 
                this._value = x_Null;
            } 
            else {
                this._value = (value != 0) ? x_True : x_False;
            }
        } 

        private byte ByteValue { 
            get { 
                return _value;
            } 
        }

        public bool IsFalse {
            get { 
                return _value == x_False;
            } 
        } 

        public bool IsNull { 
            get {
                return _value == x_Null;
            }
        } 

        public bool IsTrue { 
            get { 
                return _value == x_True;
            } 
        }

        public bool Value {
            get { 
                switch (_value) {
                case x_True: 
                    return true; 

                case x_False: 
                    return false;

                default:
                    throw ADP.DataIsNull(); 
                }
            } 
        } 

 
        public int CompareTo( object obj ) {
            if (obj is OracleBoolean) {
                OracleBoolean i = (OracleBoolean)obj;
 
                // If both Null, consider them equal.
                // Otherwise, Null is less than anything. 
                if (IsNull) { 
                    return i.IsNull ? 0  : -1;
                } 
                else if (i.IsNull) {
                    return 1;
                }
 
                if (this.ByteValue < i.ByteValue) { return -1; }
                if (this.ByteValue > i.ByteValue) { return 1; } 
                return 0; 
            }
            throw ADP.WrongType(obj.GetType(), typeof(OracleBoolean)); 
        }

        public override bool Equals(object value) {
            if (value is OracleBoolean) { 
                OracleBoolean i = (OracleBoolean)value;
 
                if (i.IsNull || IsNull) { 
                    return (i.IsNull && IsNull);
                } 
                else {
                    return (this == i).Value;
                }
            } 
            return false;
       } 
 
        public override int GetHashCode() {
            return IsNull ? 0 : _value.GetHashCode(); 
        }

        public static OracleBoolean Parse(string s) {
            OracleBoolean ret; 
            try {
                ret = new OracleBoolean(Int32.Parse(s, CultureInfo.InvariantCulture)); 
            } 
            catch (Exception e) {
                Type type = e.GetType(); 
                if ( (type == ADP.ArgumentNullExceptionType) ||
                     (type == ADP.FormatExceptionType)       ||
                     (type == ADP.OverflowExceptionType) ) {
                    ret = new OracleBoolean(Boolean.Parse(s)); 
                }
                else { 
                    throw e; 
                }
            } 
            return ret;
        }

        public override string ToString() { 
            if (IsNull) {
                return ADP.NullString; 
            } 
            return Value.ToString(CultureInfo.CurrentCulture);
        } 


        public static OracleBoolean And(OracleBoolean x, OracleBoolean y) {
            // Alternative method for operator & 
            return (x & y);
        } 
 
        public static OracleBoolean Equals(OracleBoolean x, OracleBoolean y) {
            // Alternative method for operator == 
            return (x == y);
        }

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

        public static OracleBoolean OnesComplement(OracleBoolean x) { 
            // Alternative method for operator ~
            return (~x);
        }
 
        public static OracleBoolean Or(OracleBoolean x, OracleBoolean y) {
            // Alternative method for operator | 
            return (x | y); 
        }
 
        public static OracleBoolean Xor(OracleBoolean x, OracleBoolean y) {
            // Alternative method for operator ^
            return (x ^ y);
        } 

        public static implicit operator OracleBoolean(bool x) { 
            // Implicit conversion from bool to OracleBoolean 
            return new OracleBoolean(x);
        } 

        public static explicit operator OracleBoolean(string x) {
            // Explicit conversion from string to OracleBoolean
            return OracleBoolean.Parse(x); 
        }
 
        public static explicit operator OracleBoolean(OracleNumber x) { 
            // Explicit conversion from OracleNumber to OracleBoolean
            return x.IsNull ? Null : new OracleBoolean(x.Value != Decimal.Zero); 
        }

        public static explicit operator bool(OracleBoolean x) {
            // Explicit conversion from OracleBoolean to bool. Throw exception if x is Null. 
            return x.Value;
        } 
 

        //--------------------------------------------------------------------- 
        // Unary operators
        //----------------------------------------------------------------------

        public static OracleBoolean operator!   (OracleBoolean x) { 
            switch (x._value) {
                case x_True: 
                    return OracleBoolean.False; 

                case x_False: 
                    return OracleBoolean.True;

                default:
                    Debug.Assert(x._value == x_Null); 
                    return OracleBoolean.Null;
            } 
        } 

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

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


        //--------------------------------------------------------------------- 
        // Binary operators
        //---------------------------------------------------------------------- 
 
        public static OracleBoolean operator&   (OracleBoolean x, OracleBoolean y) {
            if (x._value == x_False || y._value == x_False) { 
                return OracleBoolean.False;
            }
            else if (x._value == x_True && y._value == x_True) {
                return OracleBoolean.True; 
            }
            else { 
                return OracleBoolean.Null; 
            }
        } 

        public static OracleBoolean operator==  (OracleBoolean x, OracleBoolean y) {
            return(x.IsNull || y.IsNull) ? OracleBoolean.Null : new OracleBoolean(x._value == y._value);
        } 

        public static OracleBoolean operator!=  (OracleBoolean x, OracleBoolean y) { 
            return ! (x == y); 
        }
 
        public static OracleBoolean operator|   (OracleBoolean x, OracleBoolean y) {
            if (x._value == x_True || y._value == x_True) {
                return OracleBoolean.True;
            } 
            else if (x._value == x_False && y._value == x_False) {
                return OracleBoolean.False; 
            } 
            else {
                return OracleBoolean.Null; 
            }
        }

        public static OracleBoolean operator^   (OracleBoolean x, OracleBoolean y) { 
            return(x.IsNull || y.IsNull) ? Null : new OracleBoolean(x._value != y._value);
        } 
 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

                        

                        

                        
                        

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