public void Visit(WhereStatement statement)
{
var statementDomArg = VisitChild(statement.BooleanExpression, new CodeDomArg() { Scope = _codeStack.Peek().Scope });
CodeMemberMethod method = new CodeMemberMethod();
method.Name = "Where_" + statementDomArg.MethodIdentifier;
method.Attributes = MemberAttributes.Private;
method.ReturnType = _codeStack.Peek().Scope.CodeDomReference;
method.Parameters.Add(new CodeParameterDeclarationExpression(_codeStack.Peek().Scope.CodeDomReference, "table"));
GenerateCallStatement(method.Statements, statement.Line.Line);
_mainType.Type.Members.Add(method);
method.Statements.Add(new CodeVariableDeclarationStatement(_codeStack.Peek().Scope.CodeDomReference, "newTable",
new CodeObjectCreateExpression(_codeStack.Peek().Scope.CodeDomReference)));
var boolean = new CodeSnippetExpression("row => {" + GenerateCodeFromStatement(new CodeMethodReturnStatement(statementDomArg.CodeExpression)) + "}");
var rowType = new CodeTypeReference("IList", new CodeTypeReference(_codeStack.Peek().Scope.CodeDomReference.TypeArguments[0].BaseType));
method.Statements.Add(new CodeVariableDeclarationStatement(rowType, "rows",
new CodeMethodInvokeExpression(
new CodeMethodInvokeExpression(new CodeMethodReferenceExpression(
new CodeTypeReferenceExpression("table"), "Where"), boolean), "ToList"))
);
method.Statements.Add(new CodeMethodInvokeExpression(
new CodeVariableReferenceExpression("newTable"), "SetRows", new CodeVariableReferenceExpression("rows")));
if(statement.NodesBooleanExpression != null)
{
method.Statements.Add(new CodeVariableDeclarationStatement(
new CodeTypeReference("IEnumerator",
new CodeTypeReference(_codeStack.Peek().Scope.CodeDomReference.TypeArguments[0].BaseType)), "i",
new CodeMethodInvokeExpression(new CodeVariableReferenceExpression("newTable"), "GetEnumerator")));
var loop = new CodeIterationStatement();
method.Statements.Add(loop);
loop.InitStatement = new CodeSnippetStatement();
loop.IncrementStatement = new CodeSnippetStatement();
loop.TestExpression = new CodeMethodInvokeExpression(new CodeVariableReferenceExpression("i"), "MoveNext");
loop.Statements.Add(new CodeVariableDeclarationStatement(new CodeTypeReference(_codeStack.Peek().Scope.CodeDomReference.TypeArguments[0].BaseType), "row",
new CodePropertyReferenceExpression(new CodeVariableReferenceExpression("i"), "Current")));
var aliases = Scope.Current.AliasType<DownloadPage>();
if(aliases.Length == 1)
{
loop.Statements.Add(new CodeAssignStatement(
new CodePropertyReferenceExpression(new CodeVariableReferenceExpression("row"), aliases[0]),
new CodeMethodInvokeExpression(
new CodePropertyReferenceExpression(new CodeVariableReferenceExpression("row"), aliases[0]), "CssWhere",
new CodePrimitiveExpression(statement.NodesBooleanExpression.Selector))));
}
else if(aliases.Length > 0) //more than one
{
throw new InvalidOperationException("AmbiguousSelectVariable");
//Errors.Add(new AmbiguousSelectVariable(new Semantic.LineInfo(statement.NodesBooleanExpression.Line.Line, statement.NodesBooleanExpression.Line.CharacterPosition), "nodes"));
}
}
method.Statements.Add(new CodeMethodReturnStatement(new CodeVariableReferenceExpression("newTable")));
var methodcall = new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(null, method.Name), new CodeArgumentReferenceExpression("fromTable"));
_codeStack.Peek().CodeExpression = methodcall;
}
public void Visit(WhereStatement statement, CommonTree tree)
{
Parent(tree).Children.Add(statement);
SetLine(statement, tree);
VisitChildren(tree);
}