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//------------------------------------------------------------------------------
// <copyright file="ConstNode.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
// <owner current="false" primary="false">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Data {
using System;
using System.Diagnostics;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
internal sealed class ConstNode : ExpressionNode {
internal readonly object val;
internal ConstNode(DataTable table, ValueType type, object constant) : this(table, type, constant, true) {
}
internal ConstNode(DataTable table, ValueType type, object constant, bool fParseQuotes) : base(table) {
switch (type) {
case ValueType.Null:
this.val = DBNull.Value;
break;
case ValueType.Numeric:
this.val = SmallestNumeric(constant);
break;
case ValueType.Decimal:
this.val = SmallestDecimal(constant);
break;
case ValueType.Float:
this.val = Convert.ToDouble(constant, NumberFormatInfo.InvariantInfo);
break;
case ValueType.Bool:
this.val = Convert.ToBoolean(constant, CultureInfo.InvariantCulture);
break;
case ValueType.Str:
if (fParseQuotes) {
// replace '' with one '
this.val = ((string)constant).Replace("''", "'");
}
else {
this.val = (string)constant;
}
break;
case ValueType.Date:
this.val = DateTime.Parse((string)constant, CultureInfo.InvariantCulture);
break;
case ValueType.Object:
this.val = constant;
break;
default:
Debug.Assert(false, "NYI");
goto case ValueType.Object;
}
}
internal override void Bind(DataTable table, List<DataColumn> list) {
BindTable(table);
}
internal override object Eval() {
return val;
}
internal override object Eval(DataRow row, DataRowVersion version) {
return Eval();
}
internal override object Eval(int[] recordNos) {
return Eval();
}
internal override bool IsConstant() {
return true;
}
internal override bool IsTableConstant() {
return true;
}
internal override bool HasLocalAggregate() {
return false;
}
internal override bool HasRemoteAggregate() {
return false;
}
internal override ExpressionNode Optimize() {
return this;
}
private object SmallestDecimal(object constant) {
if (null == constant) {
return 0d;
}
else {
string sval = (constant as string);
if (null != sval) {
decimal r12;
if (Decimal.TryParse(sval, NumberStyles.Number, NumberFormatInfo.InvariantInfo, out r12)) {
return r12;
}
double r8;
if (Double.TryParse(sval, NumberStyles.Float| NumberStyles.AllowThousands, NumberFormatInfo.InvariantInfo, out r8)) {
return r8;
}
}
else {
IConvertible convertible = (constant as IConvertible);
if (null != convertible) {
try {
return convertible.ToDecimal(NumberFormatInfo.InvariantInfo);
}
catch (System.ArgumentException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.FormatException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.InvalidCastException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.OverflowException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
try {
return convertible.ToDouble(NumberFormatInfo.InvariantInfo);
}
catch (System.ArgumentException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.FormatException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.InvalidCastException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.OverflowException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
}
}
}
return constant;
}
private object SmallestNumeric(object constant) {
if (null == constant) {
return (int)0;
}
else {
string sval = (constant as string);
if (null != sval) {
int i4;
if (Int32.TryParse(sval, NumberStyles.Integer, NumberFormatInfo.InvariantInfo, out i4)) {
return i4;
}
long i8;
if (Int64.TryParse(sval, NumberStyles.Integer, NumberFormatInfo.InvariantInfo, out i8)) {
return i8;
}
double r8;
if (Double.TryParse(sval, NumberStyles.Float| NumberStyles.AllowThousands, NumberFormatInfo.InvariantInfo, out r8)) {
return r8;
}
}
else {
IConvertible convertible = (constant as IConvertible);
if (null != convertible) {
try {
return convertible.ToInt32(NumberFormatInfo.InvariantInfo);
}
catch (System.ArgumentException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.FormatException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.InvalidCastException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.OverflowException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
try {
return convertible.ToInt64(NumberFormatInfo.InvariantInfo);
}
catch (System.ArgumentException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.FormatException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.InvalidCastException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.OverflowException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
try {
return convertible.ToDouble(NumberFormatInfo.InvariantInfo);
}
catch (System.ArgumentException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.FormatException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.InvalidCastException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
catch (System.OverflowException e) {
ExceptionBuilder.TraceExceptionWithoutRethrow(e);
}
}
}
}
return constant;
}
}
}
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