public override void Visit(DbCastExpression expression)
{
Write(expression);
_depth++;
Write("Argument", expression.Argument);
_depth--;
}
public override Expression Visit(DbCastExpression expression)
{
Expression source = this.Visit(expression.Argument);
Type resultType = edmTypeConverter.Convert(expression.ResultType);
if (resultType == typeof(string))
{
return Expression.Call(
null,
StringFunctions.ConvertToString,
Expression.Convert(source, typeof(object)));
}
var resType = TypeHelper.MakeNotNullable(resultType);
if (source.Type == typeof(string) && TypeHelper.IsNumeric(resType))
{
return Expression.Call(
null,
StringFunctions.ParseString.MakeGenericMethod(resType),
source);
}
return Expression.Convert(source, resultType);
}
public override LegacyCommandTrees.DbExpression Visit(DbCastExpression expression)
{
Debug.Assert(expression != null, "expression != null");
return
(expression.Argument.Accept(this).CastTo(expression.ResultType.ToLegacyEdmTypeUsage()));
}
/// <summary>
/// Casts argument to expression.
/// </summary>
/// <param name="node">Cast expression node</param>
/// <returns>Result of casting argument</returns>
public override PropagatorResult Visit(DbCastExpression node)
{
Debug.Assert(null != node, "node is not visited when null");
PropagatorResult childResult = Visit(node.Argument);
TypeUsage nodeType = node.ResultType;
if (!childResult.IsSimple || BuiltInTypeKind.PrimitiveType != nodeType.EdmType.BuiltInTypeKind)
{
throw EntityUtil.NotSupported(Strings.Update_UnsupportedCastArgument(nodeType.EdmType.Name));
}
object resultValue;
if (childResult.IsNull)
{
resultValue = null;
}
else
{
try
{
resultValue = Cast(childResult.GetSimpleValue(), ((PrimitiveType)nodeType.EdmType).ClrEquivalentType);
}
catch
{
Debug.Fail("view generator failed to validate cast in update mapping view");
throw;
}
}
PropagatorResult result = childResult.ReplicateResultWithNewValue(resultValue);
return(result);
}
public override void Visit(DbCastExpression e)
{
Check.NotNull(e, "e");
BeginUnary(e);
End(e);
}
public override Expression Visit(DbCastExpression expression)
{
Expression source = this.Visit(expression.Argument);
Type resultType = edmTypeConverter.Convert(expression.ResultType);
if (resultType == typeof(string))
{
return(Expression.Call(
null,
StringFunctions.ConvertToString,
Expression.Convert(source, typeof(object))));
}
var resType = TypeHelper.MakeNotNullable(resultType);
if (source.Type == typeof(string) && TypeHelper.IsNumeric(resType))
{
return(Expression.Call(
null,
StringFunctions.ParseString.MakeGenericMethod(resType),
source));
}
return(Expression.Convert(source, resultType));
}
/// <summary>
/// Implements the visitor pattern for <see cref="T:System.Data.Common.CommandTrees.DbCastExpression"/>.
/// </summary>
/// <param name="expression">The <see cref="T:System.Data.Common.CommandTrees.DbCastExpression"/> that is visited.</param>
public override void Visit(DbCastExpression expression)
{
if (expression == null)
{
throw new ArgumentNullException("expression");
}
expression.Argument.Accept(this);
}
public override Expression Visit(DbCastExpression expression)
{
Expression source = this.Visit(expression.Argument);
Type resultType = edmTypeConverter.Convert(expression.ResultType);
if (resultType == typeof(string))
{
return Expression.Call(
null,
StringFunctions.ConvertToString,
Expression.Convert(source, typeof(object)));
}
return Expression.Convert(source, resultType);
}
public override Expression Visit(DbCastExpression expression)
{
Expression source = this.Visit(expression.Argument);
Type resultType = edmTypeConverter.Convert(expression.ResultType);
if (resultType == typeof(string))
{
return(Expression.Call(
null,
StringFunctions.ConvertToString,
Expression.Convert(source, typeof(object))));
}
return(Expression.Convert(source, resultType));
}
/// <inheritdoc/>
public override void Visit(DbCastExpression e)
{
var sourceSqlType = e.SourceColumn.GetSqlType();
var targetSqlType = e.TargetColumn.GetSqlType();
if (CanEliminateCast(sourceSqlType, targetSqlType))
{
e.Operand.Accept(this);
}
else
{
SqlBuilder.Append("CAST(");
e.Operand.Accept(this);
SqlBuilder.Append(" AS ");
SqlBuilder.Append(targetSqlType.GetDataTypeSql(this.SqlVersion));
SqlBuilder.Append(")");
}
}
/// <summary>
/// Casts argument to expression.
/// </summary>
/// <param name="node"> Cast expression node </param>
/// <returns> Result of casting argument </returns>
public override PropagatorResult Visit(DbCastExpression node)
{
Check.NotNull(node, "node");
var childResult = Visit(node.Argument);
var nodeType = node.ResultType;
if (!childResult.IsSimple ||
BuiltInTypeKind.PrimitiveType != nodeType.EdmType.BuiltInTypeKind)
{
throw new NotSupportedException(Strings.Update_UnsupportedCastArgument(nodeType.EdmType.Name));
}
object resultValue;
if (childResult.IsNull)
{
resultValue = null;
}
else
{
try
{
resultValue = Cast(childResult.GetSimpleValue(), ((PrimitiveType)nodeType.EdmType).ClrEquivalentType);
}
catch
{
Debug.Fail("view generator failed to validate cast in update mapping view");
throw;
}
}
var result = childResult.ReplicateResultWithNewValue(resultValue);
return(result);
}
/// <summary>
/// Implements the visitor pattern for <see cref="T:System.Data.Common.CommandTrees.DbCastExpression"/>.
/// </summary>
/// <param name="expression">The <see cref="T:System.Data.Common.CommandTrees.DbCastExpression"/> that is visited.</param>
public override void Visit(DbCastExpression expression)
{
if (expression == null)
{
throw new ArgumentNullException("expression");
}
expression.Argument.Accept(this);
}
public override void Visit(DbCastExpression expression)
{
VisitUnaryExpression(expression);
}
public override TreeNode Visit(DbCastExpression e)
{
Check.NotNull <DbCastExpression>(e, nameof(e));
return(this.VisitCastOrTreat("Cast", (DbUnaryExpression)e));
}
public override void Visit(DbCastExpression e)
{
VisitCastOrTreat(e);
}
public override void Visit(DbCastExpression expression)
{
throw new NotSupportedException("Visit(\"DbCastExpression\") is not supported.");
}
public override SqlFragment Visit(DbCastExpression expression)
{
//TODO: handle casting
return(expression.Argument.Accept(this));
}
public override void Visit(DbCastExpression e)
{
Check.NotNull(e, "e");
VisitCastOrTreat(e);
}
/// <summary>
/// Visitor pattern method for <see cref="DbCastExpression" />.
/// </summary>
/// <param name="expression"> The DbCastExpression that is being visited. </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="expression" />
/// is null
/// </exception>
public override void Visit(DbCastExpression expression)
{
Check.NotNull(expression, "expression");
VisitUnaryExpression(expression);
}
public override DbExpressionEntitySetInfo Visit(DbCastExpression expression)
{
Check.NotNull(expression, "expression");
return(null);
}
public override void Visit(DbCastExpression e)
{
BeginUnary(e);
End(e);
}
public override VfpExpression Visit(DbCastExpression expression)
{
return(new VfpCastExpression(expression.ResultType, expression.Argument.Accept(this)));
}
/// <summary> /// Typed visitor pattern method for DbCastExpression. /// </summary> /// <param name="expression"> The DbCastExpression that is being visited. </param> /// <returns> An instance of TResultType. </returns> public abstract TResultType Visit(DbCastExpression expression);
public override TReturn Visit(DbCastExpression expression)
{
Check.NotNull <DbCastExpression>(expression, nameof(expression));
throw this.ConstructNotSupportedException((DbExpression)expression);
}
public override void Visit(DbCastExpression e)
{
Check.NotNull <DbCastExpression>(e, nameof(e));
this.VisitCastOrTreat((DbUnaryExpression)e);
}
public override TReturn Visit(DbCastExpression expression)
{
throw ConstructNotSupportedException(expression);
}
public override DbExpression Visit(DbCastExpression expression)
{
System.Diagnostics.Debug.Print("Visit(DbCastExpression): {0}", expression);
return(base.Visit(expression));
}
public override TreeNode Visit(DbCastExpression e)
{
Check.NotNull(e, "e");
return(VisitCastOrTreat("Cast", e));
}
public override object Visit(DbCastExpression expression)
{
this.Visit(expression.Argument);
return(null);
}
public override bool Visit(DbCastExpression expression)
{
return(VisitUnaryExpression(expression));
}
public override void Visit(DbCastExpression e)
{
Check.NotNull(e, "e");
BeginUnary(e);
End(e);
}
public override TreeNode Visit(DbCastExpression e)
{
return(VisitCastOrTreat("Cast", e));
}
public override void Visit(DbCastExpression expression)
{
throw new NotSupportedException("Visit(\"CastExpression\") is not supported.");
}
/// <summary> /// Visits the <see cref="DbCastExpression"/>. /// </summary> /// <param name="expression">The expression.</param> /// <returns>The result.</returns> public abstract T Visit(DbCastExpression expression);
public override void Visit(DbCastExpression expression)
{
VisitUnaryExpression(expression);
}
public override bool Visit(DbCastExpression expression)
{
Check.NotNull <DbCastExpression>(expression, nameof(expression));
return(this.VisitUnaryExpression((DbUnaryExpression)expression));
}
public override void Visit(DbCastExpression e)
{
VisitCastOrTreat(e);
}
public override DbExpression Visit(DbCastExpression expression)
{
System.Diagnostics.Debug.Print("Visit(DbCastExpression): {0}", expression);
return base.Visit(expression);
}
public override ISqlFragment Visit(DbCastExpression e)
{
return(new SqlBuilder("cast(", e.Argument.Accept(this), " as ", MetadataHelpers.GetSqlPrimitiveType(e.ResultType), ")"));
}
public override void Visit(DbCastExpression e)
{
Check.NotNull(e, "e");
VisitCastOrTreat(e);
}
public override void Visit(DbCastExpression expression)
{
Contract.Requires(expression != null);
}
public override void Visit(DbCastExpression expression) { }
public override DbExpressionEntitySetInfo Visit(DbCastExpression expression)
{
return(null);
}
/// <summary> /// Visitor pattern method for DbCastExpression. /// </summary> /// <param name="expression"> The DbCastExpression that is being visited. </param> public abstract void Visit(DbCastExpression expression);
