SQlBooleanStorage.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / Common / SQLTypes / SQlBooleanStorage.cs / 1 / SQlBooleanStorage.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
// [....] 
//----------------------------------------------------------------------------- 

namespace System.Data.Common { 
    using System;
    using System.Xml;
    using System.Data.SqlTypes;
    using System.Diagnostics; 
    using System.Globalization;
    using System.IO; 
    using System.Xml.Serialization; 
    using System.Collections;
 
    internal sealed class SqlBooleanStorage : DataStorage {

        private SqlBoolean[] values;
 
        public SqlBooleanStorage(DataColumn column)
        : base(column, typeof(SqlBoolean), SqlBoolean.Null, SqlBoolean.Null) { 
        } 

        override public Object Aggregate(int[] records, AggregateType kind) { 
            bool hasData = false;
            try {
                switch (kind) {
                    case AggregateType.Min: 
                        SqlBoolean min = true;
                        for (int i = 0; i < records.Length; i++) { 
                            int record = records[i]; 
                            if (IsNull(record))
                                continue; 
                            min= SqlBoolean.And(values[record], min);
                            hasData = true;
                        }
                        if (hasData) { 
                            return min;
                        } 
                        return NullValue; 

                    case AggregateType.Max: 
                        SqlBoolean max = false;
                        for (int i = 0; i < records.Length; i++) {
                            int record = records[i];
                            if (IsNull(record)) 
                                continue;
                            max= SqlBoolean.Or(values[record], max); 
                            hasData = true; 
                        }
                        if (hasData) { 
                            return max;
                        }
                        return NullValue;
 
                    case AggregateType.First:
                        if (records.Length > 0) { 
                            return values[records[0]]; 
                        }
                        return NullValue; 

                    case AggregateType.Count:
                        int count = 0;
                        for (int i = 0; i < records.Length; i++) { 
                            if (!IsNull(records[i]))
                                count++; 
                        } 
                        return count;
                } 
            }
            catch (OverflowException) {
                throw ExprException.Overflow(typeof(SqlBoolean));
            } 
            throw ExceptionBuilder.AggregateException(kind, DataType);
        } 
 
        override public int Compare(int recordNo1, int recordNo2) {
            return values[recordNo1].CompareTo(values[recordNo2]); 
        }

        override public int CompareValueTo(int recordNo, Object value) {
            return values[recordNo].CompareTo((SqlBoolean)value); 
        }
 
        override public object ConvertValue(object value) { 
            if (null != value) {
                return SqlConvert.ConvertToSqlBoolean(value); 
            }
            return NullValue;
        }
 
        override public void Copy(int recordNo1, int recordNo2) {
            values[recordNo2] = values[recordNo1]; 
        } 

        override public Object Get(int record) { 
            return values[record];
        }

        override public bool IsNull(int record) { 
            return (values[record].IsNull);
        } 
 
        override public void Set(int record, Object value) {
            values[record] = SqlConvert.ConvertToSqlBoolean(value); 
        }

        override public void SetCapacity(int capacity) {
            SqlBoolean[] newValues = new SqlBoolean[capacity]; 
            if (null != values) {
                Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length)); 
            } 
            values = newValues;
        } 

        override public object ConvertXmlToObject(string s) {
            SqlBoolean newValue = new SqlBoolean();
            string tempStr =string.Concat("", s, ""); // this is done since you can give fragmet to reader, bug 98767 
            StringReader strReader = new  StringReader(tempStr);
 
            IXmlSerializable tmp = newValue; 

            using (XmlTextReader xmlTextReader = new XmlTextReader(strReader)) { 
                tmp.ReadXml(xmlTextReader);
            }
            return ((SqlBoolean)tmp);
        } 

        override public string ConvertObjectToXml(object value) { 
            Debug.Assert(!DataStorage.IsObjectNull(value), "we should have null here"); 
            Debug.Assert((value.GetType() == typeof(SqlBoolean)), "wrong input type");
 
            StringWriter strwriter = new StringWriter(FormatProvider);

            using (XmlTextWriter xmlTextWriter = new XmlTextWriter (strwriter)) {
                ((IXmlSerializable)value).WriteXml(xmlTextWriter); 
            }
            return (strwriter.ToString ()); 
        } 

        override protected object GetEmptyStorage(int recordCount) { 
            return new SqlBoolean[recordCount];
        }

        override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) { 
            SqlBoolean[] typedStore = (SqlBoolean[]) store;
            typedStore[storeIndex] = values[record]; 
            nullbits.Set(storeIndex, IsNull(record)); 
        }
 
        override protected void SetStorage(object store, BitArray nullbits) {
            values = (SqlBoolean[]) store;
            //SetNullStorage(nullbits);
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK