public void Visit(FromStatement statement)
{
CodeMemberMethod method = new CodeMemberMethod();
method.Name = "From_" + Guid.NewGuid().ToString("N");
method.Attributes = MemberAttributes.Private;
GenerateCallStatement(method.Statements, statement.Line.Line);
_mainType.Type.Members.Add(method);
_joinMembers.Clear();
CodeTypeReference anonType;
var fetchMethod = CreateFetch(statement, out anonType);
method.Statements.Add(new CodeVariableDeclarationStatement(new CodeTypeReference("IEnumerable", anonType), "join",
new CodeMethodInvokeExpression(new CodeMethodReferenceExpression(null, fetchMethod.Name))));
if(statement.Join != null)
{
var args = VisitChild(statement.Join, new CodeDomArg() {Scope = new ScopeData<Type> { Type = typeof(int), CodeDomReference = anonType} });
method.Statements.Add(new CodeMethodReturnStatement(args.CodeExpression));
method.ReturnType = args.Scope.CodeDomReference;
_codeStack.Peek().Scope = args.Scope;
}
else
{
var tableType = new CodeTypeReference("CodeTable", anonType);
method.ReturnType = tableType;
_codeStack.Peek().Scope = new ScopeData<Type> { Type = typeof(int), CodeDomReference = tableType };
method.Statements.Add(new CodeVariableDeclarationStatement(tableType, "newTable",
new CodeObjectCreateExpression(tableType)));
method.Statements.Add(new CodeMethodInvokeExpression(
new CodeVariableReferenceExpression("newTable"), "SetRows",
new CodeMethodInvokeExpression(new CodeVariableReferenceExpression("join"), "ToList")));
method.Statements.Add(new CodeMethodReturnStatement(new CodeVariableReferenceExpression("newTable")));
}
var methodcall = new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(null, method.Name));
_codeStack.Peek().CodeExpression = methodcall;
}
public void Visit(FromStatement statement, CommonTree tree)
{
Parent(tree).Children.Add(statement);
SetLine(statement, tree);
VisitChildren(tree);
}
public void Visit(UpdateStatement statement)
{
using (Scope.PushSelect())
{
CodeMemberMethod method = new CodeMemberMethod();
method.Name = "Update_" + Guid.NewGuid().ToString("N");
method.Attributes = MemberAttributes.Private;
GenerateCallStatement(method.Statements, statement.Line.Line);
_mainType.Type.Members.Add(method);
FromStatement fromStatement = null;
if (statement.From == null) //alias must be a table ref
{
var tableReference = new TableVariableReference() { Id = statement.Alias.Id, Line = statement.Alias.Line };
fromStatement = new FromStatement() { Line = tableReference.Line };
fromStatement.Children.Add(tableReference);
}
else
fromStatement = statement.From;
var fromDomArg = VisitChild(fromStatement);
var rowType = fromDomArg.Scope.CodeDomReference.TypeArguments[0];
var type = Scope.Current.FindTypeWithAlias(statement.Alias.Id);
if (type != null && type == typeof(FileTable<>)) //filetables cannot be updated only inserted into
Errors.Add(new FileTableImmutable(new Semantic.LineInfo(statement.Line.Line, statement.Line.CharacterPosition)));
method.Statements.Add(new CodeVariableDeclarationStatement(fromDomArg.Scope.CodeDomReference,
"fromTable",
fromDomArg.CodeExpression));
if (statement.Where != null)
{
var domWhereArgs = VisitChild(statement.Where, new CodeDomArg() { Scope = fromDomArg.Scope });
method.Statements.Add(new CodeAssignStatement(new CodeVariableReferenceExpression("fromTable"), domWhereArgs.CodeExpression));
}
//outside iterator
method.Statements.Add(new CodeVariableDeclarationStatement(new CodeTypeReference("IEnumerator", rowType),
"x",
new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(new CodeTypeReferenceExpression("fromTable"), "GetEnumerator",
null))));
var loop = new CodeIterationStatement();
loop.InitStatement = new CodeSnippetStatement();
loop.IncrementStatement = new CodeSnippetStatement();
loop.TestExpression = new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(new CodeTypeReferenceExpression("x"), "MoveNext",
null));
loop.Statements.Add(new CodeVariableDeclarationStatement(rowType,
"row",
new CodePropertyReferenceExpression(new CodeTypeReferenceExpression("x"), "Current")));
foreach (var a in statement.SetArgs.AssignStatements)
{
var assignmentArg = VisitChild(a);
loop.Statements.AddRange(assignmentArg.ParentStatements);
}
method.Statements.Add(loop);
var methodcall = new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(null, method.Name));
_codeStack.Peek().CodeExpression = methodcall;
_codeStack.Peek().ParentStatements.Add(methodcall);
}
}
