Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Data / System / Data / Filter / UnaryNode.cs / 1 / UnaryNode.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// [....]
// [....]
// [....]
//-----------------------------------------------------------------------------
namespace System.Data {
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Data.Common;
using System.Data.SqlTypes;
internal sealed class UnaryNode : ExpressionNode {
internal readonly int op;
internal ExpressionNode right;
internal UnaryNode(DataTable table, int op, ExpressionNode right) : base(table) {
this.op = op;
this.right = right;
}
internal override void Bind(DataTable table, List list) {
BindTable(table);
right.Bind(table, list);
}
internal override object Eval() {
return Eval(null, DataRowVersion.Default);
}
internal override object Eval(DataRow row, DataRowVersion version) {
return EvalUnaryOp(op, right.Eval(row, version));
}
internal override object Eval(int[] recordNos) {
return right.Eval(recordNos);
}
private object EvalUnaryOp(int op, object vl) {
object value = DBNull.Value;
if (DataExpression.IsUnknown(vl))
return DBNull.Value;
StorageType storageType;
switch (op) {
case Operators.Noop:
return vl;
case Operators.UnaryPlus:
storageType = DataStorage.GetStorageType(vl.GetType());
if (ExpressionNode.IsNumericSql(storageType)) {
return vl;
}
throw ExprException.TypeMismatch(this.ToString());
case Operators.Negative:
// the have to be better way for doing this..
storageType = DataStorage.GetStorageType(vl.GetType());
if (ExpressionNode.IsNumericSql(storageType)) {
switch(storageType) {
case StorageType.Byte:
value = -(Byte) vl;
break;
case StorageType.Int16:
value = -(Int16) vl;
break;
case StorageType.Int32:
value = -(Int32) vl;
break;
case StorageType.Int64:
value = -(Int64) vl;
break;
case StorageType.Single:
value = -(Single) vl;
break;
case StorageType.Double:
value = -(Double) vl;
break;
case StorageType.Decimal:
value = -(Decimal) vl;
break;
case StorageType.SqlDecimal:
value = -(SqlDecimal) vl;
break;
case StorageType.SqlDouble:
value = -(SqlDouble) vl;
break;
case StorageType.SqlSingle:
value = -(SqlSingle) vl;
break;
case StorageType.SqlMoney:
value = -(SqlMoney) vl;
break;
case StorageType.SqlInt64:
value = -(SqlInt64) vl;
break;
case StorageType.SqlInt32:
value = -(SqlInt32) vl;
break;
case StorageType.SqlInt16:
value = -(SqlInt16) vl;
break;
default:
Debug.Assert(false, "Missing a type conversion");
value = DBNull.Value;
break;
}
return value;
}
throw ExprException.TypeMismatch(this.ToString());
case Operators.Not:
if (vl is SqlBoolean){
if (((SqlBoolean)vl).IsFalse){
return SqlBoolean.True;
}
else if (((SqlBoolean)vl).IsTrue) {
return SqlBoolean.False;
}
throw ExprException.UnsupportedOperator(op); // or should the result of not SQLNull be SqlNull ?
}
else{
if (DataExpression.ToBoolean(vl) != false)
return false;
return true;
}
default:
throw ExprException.UnsupportedOperator(op);
}
}
internal override bool IsConstant() {
return(right.IsConstant());
}
internal override bool IsTableConstant() {
return(right.IsTableConstant());
}
internal override bool HasLocalAggregate() {
return(right.HasLocalAggregate());
}
internal override bool HasRemoteAggregate() {
return(right.HasRemoteAggregate());
}
internal override bool DependsOn(DataColumn column) {
return(right.DependsOn(column));
}
internal override ExpressionNode Optimize() {
right = right.Optimize();
if (this.IsConstant()) {
object val = this.Eval();
return new ConstNode(table, ValueType.Object, val, false);
}
else
return this;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// [....]
// [....]
// [....]
//-----------------------------------------------------------------------------
namespace System.Data {
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Data.Common;
using System.Data.SqlTypes;
internal sealed class UnaryNode : ExpressionNode {
internal readonly int op;
internal ExpressionNode right;
internal UnaryNode(DataTable table, int op, ExpressionNode right) : base(table) {
this.op = op;
this.right = right;
}
internal override void Bind(DataTable table, List list) {
BindTable(table);
right.Bind(table, list);
}
internal override object Eval() {
return Eval(null, DataRowVersion.Default);
}
internal override object Eval(DataRow row, DataRowVersion version) {
return EvalUnaryOp(op, right.Eval(row, version));
}
internal override object Eval(int[] recordNos) {
return right.Eval(recordNos);
}
private object EvalUnaryOp(int op, object vl) {
object value = DBNull.Value;
if (DataExpression.IsUnknown(vl))
return DBNull.Value;
StorageType storageType;
switch (op) {
case Operators.Noop:
return vl;
case Operators.UnaryPlus:
storageType = DataStorage.GetStorageType(vl.GetType());
if (ExpressionNode.IsNumericSql(storageType)) {
return vl;
}
throw ExprException.TypeMismatch(this.ToString());
case Operators.Negative:
// the have to be better way for doing this..
storageType = DataStorage.GetStorageType(vl.GetType());
if (ExpressionNode.IsNumericSql(storageType)) {
switch(storageType) {
case StorageType.Byte:
value = -(Byte) vl;
break;
case StorageType.Int16:
value = -(Int16) vl;
break;
case StorageType.Int32:
value = -(Int32) vl;
break;
case StorageType.Int64:
value = -(Int64) vl;
break;
case StorageType.Single:
value = -(Single) vl;
break;
case StorageType.Double:
value = -(Double) vl;
break;
case StorageType.Decimal:
value = -(Decimal) vl;
break;
case StorageType.SqlDecimal:
value = -(SqlDecimal) vl;
break;
case StorageType.SqlDouble:
value = -(SqlDouble) vl;
break;
case StorageType.SqlSingle:
value = -(SqlSingle) vl;
break;
case StorageType.SqlMoney:
value = -(SqlMoney) vl;
break;
case StorageType.SqlInt64:
value = -(SqlInt64) vl;
break;
case StorageType.SqlInt32:
value = -(SqlInt32) vl;
break;
case StorageType.SqlInt16:
value = -(SqlInt16) vl;
break;
default:
Debug.Assert(false, "Missing a type conversion");
value = DBNull.Value;
break;
}
return value;
}
throw ExprException.TypeMismatch(this.ToString());
case Operators.Not:
if (vl is SqlBoolean){
if (((SqlBoolean)vl).IsFalse){
return SqlBoolean.True;
}
else if (((SqlBoolean)vl).IsTrue) {
return SqlBoolean.False;
}
throw ExprException.UnsupportedOperator(op); // or should the result of not SQLNull be SqlNull ?
}
else{
if (DataExpression.ToBoolean(vl) != false)
return false;
return true;
}
default:
throw ExprException.UnsupportedOperator(op);
}
}
internal override bool IsConstant() {
return(right.IsConstant());
}
internal override bool IsTableConstant() {
return(right.IsTableConstant());
}
internal override bool HasLocalAggregate() {
return(right.HasLocalAggregate());
}
internal override bool HasRemoteAggregate() {
return(right.HasRemoteAggregate());
}
internal override bool DependsOn(DataColumn column) {
return(right.DependsOn(column));
}
internal override ExpressionNode Optimize() {
right = right.Optimize();
if (this.IsConstant()) {
object val = this.Eval();
return new ConstNode(table, ValueType.Object, val, false);
}
else
return this;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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