public static CodegenExpression Codegen(
ExprCastNodeForge forge,
CodegenClassScope codegenClassScope)
{
if (forge.EvaluationType == null) {
return ConstantNull();
}
var evaluationType = forge.EvaluationType.GetBoxedType();
var initMethod = codegenClassScope.NamespaceScope.InitMethod.MakeChildWithScope(
evaluationType,
typeof(ExprCastNodeForgeConstEval),
CodegenSymbolProviderEmpty.INSTANCE,
codegenClassScope);
var exprSymbol = new ExprForgeCodegenSymbol(true, null);
var compute = initMethod.MakeChildWithScope(
evaluationType,
typeof(ExprCastNodeForgeConstEval),
exprSymbol,
codegenClassScope)
.AddParam(ExprForgeCodegenNames.PARAMS);
compute.Block.MethodReturn(
ExprCastNodeForgeNonConstEval.Codegen(forge, compute, exprSymbol, codegenClassScope));
initMethod.Block.MethodReturn(LocalMethod(compute, Constant(null), ConstantTrue(), ConstantNull()));
return codegenClassScope.AddDefaultFieldUnshared(true, evaluationType, LocalMethod(initMethod));
}
public ExprCastNodeForgeConstEval(
ExprCastNodeForge forge,
object theConstant)
{
this.forge = forge;
this.theConstant = theConstant;
}
public ExprCastNodeForgeNonConstEval(
ExprCastNodeForge forge,
ExprEvaluator evaluator,
ExprCastNode.CasterParserComputer casterParserComputer)
{
_forge = forge;
_evaluator = evaluator;
_casterParserComputer = casterParserComputer;
}
public static CodegenExpression Codegen(
ExprCastNodeForge forge,
CodegenMethodScope codegenMethodScope,
ExprForgeCodegenSymbol exprSymbol,
CodegenClassScope codegenClassScope)
{
if (forge.EvaluationType == null) {
return ConstantNull();
}
var child = forge.ForgeRenderableCast.ChildNodes[0];
var childType = child.Forge.EvaluationType;
if (childType == null) {
return ConstantNull();
}
var forgeEvaluationType = forge.EvaluationType;
// TBD: Should all generated classes be boxed to nullable to allow
// for nullable values in case we do primitive conversion?
if (childType.CanBeNull()) {
forgeEvaluationType = forgeEvaluationType.GetBoxedType();
}
var methodNode = codegenMethodScope.MakeChild(
forgeEvaluationType,
typeof(ExprCastNodeForgeNonConstEval),
codegenClassScope);
var block = methodNode.Block
.DeclareVar(
childType,
"result",
child.Forge.EvaluateCodegen(childType, methodNode, exprSymbol, codegenClassScope));
if (childType.CanBeNull()) {
block.IfRefNullReturnNull("result");
}
var cast = forge.CasterParserComputerForge.CodegenPremade(
forgeEvaluationType,
Ref("result"),
childType,
methodNode,
exprSymbol,
codegenClassScope);
block.MethodReturn(cast);
return LocalMethod(methodNode);
}
public override ExprNode Validate(ExprValidationContext validationContext)
{
if (ChildNodes.Length == 0 || ChildNodes.Length > 2) {
throw new ExprValidationException("Cast function node must have one or two child expressions");
}
var fromType = ChildNodes[0].Forge.EvaluationType;
var classIdentifier = ClassIdentifierWArray.ClassIdentifier;
var classIdentifierInvariant = classIdentifier.Trim();
var arrayDimensions = ClassIdentifierWArray.ArrayDimensions;
// Local function to match a class identifier
bool MatchesClassIdentifier(string identifier)
{
return string.Equals(
classIdentifierInvariant,
identifier,
StringComparison.InvariantCultureIgnoreCase);
}
// determine date format parameter
var namedParams =
ExprNodeUtilityValidate.GetNamedExpressionsHandleDups(ChildNodes);
ExprNodeUtilityValidate.ValidateNamed(namedParams, new[] {"dateformat"});
var dateFormatParameter = namedParams.Get("dateformat");
if (dateFormatParameter != null) {
ExprNodeUtilityValidate.ValidateNamedExpectType(
dateFormatParameter,
new[] {
typeof(string),
typeof(DateFormat),
typeof(DateTimeFormat)
});
}
// identify target type
// try the primitive names including "string"
SimpleTypeCaster caster;
var targetType = TypeHelper.GetPrimitiveTypeForName(classIdentifier.Trim());
if (!ClassIdentifierWArray.IsArrayOfPrimitive) {
targetType = targetType.GetBoxedType();
}
targetType = ApplyDimensions(targetType);
bool numeric;
CasterParserComputerForge casterParserComputerForge = null;
if (dateFormatParameter != null) {
if (fromType != typeof(string)) {
throw new ExprValidationException(
"Use of the '" +
dateFormatParameter.ParameterName +
"' named parameter requires a string-type input");
}
if (targetType == null) {
try {
targetType = TypeHelper.GetClassForName(
classIdentifier.Trim(),
validationContext.ImportService.ClassForNameProvider);
targetType = ApplyDimensions(targetType);
}
catch (TypeLoadException) {
// expected
}
}
// dynamic or static date format
numeric = false;
caster = null;
if (targetType == typeof(DateTimeEx) ||
MatchesClassIdentifier("calendar") ||
MatchesClassIdentifier("dateTimeEx")) {
targetType = typeof(DateTimeEx);
var desc = ValidateDateFormat(dateFormatParameter, validationContext);
if (desc.IsIso8601Format) {
casterParserComputerForge = new StringToDateTimeExIsoFormatComputer();
}
else if (desc.StaticDateFormat != null) {
casterParserComputerForge = new StringToDateTimExWStaticFormatComputer(
desc.StaticDateFormat,
TimeZoneInfo.Utc); // Note how code-generation does not use the default time zone
}
else {
casterParserComputerForge = new StringToDateTimeExWExprFormatComputer(
desc.DynamicDateFormat,
TimeZoneInfo.Utc);
}
}
else if (targetType == typeof(DateTimeOffset) ||
targetType == typeof(DateTimeOffset?) ||
MatchesClassIdentifier("dto") ||
MatchesClassIdentifier("datetimeoffset")) {
targetType = typeof(DateTimeOffset);
var desc = ValidateDateFormat(dateFormatParameter, validationContext);
if (desc.IsIso8601Format) {
casterParserComputerForge = new StringToDateTimeOffsetIsoFormatComputer();
}
else if (desc.StaticDateFormat != null) {
casterParserComputerForge =
new StringToDateTimeOffsetWStaticFormatComputer(desc.StaticDateFormat);
}
else {
casterParserComputerForge =
new StringToDateTimeOffsetWExprFormatComputerForge(desc.DynamicDateFormat);
}
}
else if (targetType == typeof(DateTime) ||
targetType == typeof(DateTime?) ||
MatchesClassIdentifier("datetime")) {
targetType = typeof(DateTime);
var desc = ValidateDateFormat(dateFormatParameter, validationContext);
if (desc.IsIso8601Format) {
casterParserComputerForge = new StringToDateTimeIsoFormatComputer();
}
else if (desc.StaticDateFormat != null) {
casterParserComputerForge =
new StringToDateTimeWStaticFormatComputer(desc.StaticDateFormat);
}
else {
casterParserComputerForge =
new StringToDateTimeWExprFormatComputerForge(desc.DynamicDateFormat);
}
}
else if (targetType == typeof(long) || targetType == typeof(long?)) {
targetType = typeof(long);
var desc = ValidateDateFormat(dateFormatParameter, validationContext);
if (desc.IsIso8601Format) {
casterParserComputerForge = new StringToLongWStaticISOFormatComputer();
}
else if (desc.StaticDateFormat != null) {
casterParserComputerForge = new StringToLongWStaticFormatComputer(desc.StaticDateFormat);
}
else {
casterParserComputerForge = new StringToLongWExprFormatComputerForge(desc.DynamicDateFormat);
}
}
else {
throw new ExprValidationException(
"Use of the '" +
dateFormatParameter.ParameterName +
"' named parameter requires a target type of long, DateTime, DateTimeOffset or DateEx");
}
}
else if (targetType != null) {
targetType = targetType.GetBoxedType();
caster = SimpleTypeCasterFactory.GetCaster(fromType, targetType);
numeric = caster.IsNumericCast;
}
else if (MatchesClassIdentifier("bigint") || MatchesClassIdentifier("biginteger")) {
targetType = typeof(BigInteger);
targetType = ApplyDimensions(targetType);
caster = SimpleTypeCasterFactory.GetCaster(fromType, targetType);
numeric = true;
}
else if (MatchesClassIdentifier("decimal")) {
targetType = typeof(decimal);
targetType = ApplyDimensions(targetType);
caster = SimpleTypeCasterFactory.GetCaster(fromType, targetType);
numeric = true;
}
else {
try {
targetType = TypeHelper.GetClassForName(
classIdentifier.Trim(),
validationContext.ImportService.ClassForNameProvider);
}
catch (TypeLoadException e) {
throw new ExprValidationException(
"Class as listed in cast function by name '" + classIdentifier + "' cannot be loaded",
e);
}
targetType = ApplyDimensions(targetType);
numeric = targetType.IsNumeric();
if (numeric) {
caster = SimpleTypeCasterFactory.GetCaster(fromType, targetType);
}
else {
caster = new SimpleTypeCasterAnyType(targetType);
}
}
// assign a computer unless already assigned
if (casterParserComputerForge == null) {
// to-string
if (targetType == typeof(string)) {
casterParserComputerForge = new StringXFormComputer();
}
else if (fromType == typeof(string) && targetType != typeof(char)) {
// parse
SimpleTypeParserSPI parser = SimpleTypeParserFactory.GetParser(targetType.GetBoxedType());
casterParserComputerForge = new StringParserComputer(parser);
}
else if (numeric) {
// numeric cast with check
casterParserComputerForge = new NumberCasterComputer(caster);
}
else {
// non-numeric cast
casterParserComputerForge = new NonnumericCasterComputer(caster);
}
}
// determine constant or not
object theConstant = null;
var isConstant = false;
if (ChildNodes[0].Forge.ForgeConstantType.IsCompileTimeConstant) {
isConstant = casterParserComputerForge.IsConstantForConstInput;
if (isConstant) {
var @in = ChildNodes[0].Forge.ExprEvaluator.Evaluate(null, true, null);
theConstant = @in == null
? null
: casterParserComputerForge.EvaluatorComputer.Compute(@in, null, true, null);
}
}
forge = new ExprCastNodeForge(this, casterParserComputerForge, targetType, isConstant, theConstant);
return null;
}