public override bool Equals(Expression other)
{
LinqQueryExpression linqExpression = other as LinqQueryExpression;
if (linqExpression == null || this.Clauses.Count != linqExpression.Clauses.Count)
{
return(false);
}
for (int i = 0; i < this.Clauses.Count; i++)
{
if (!this.Clauses[i].Equals(linqExpression.Clauses[i]))
{
return(false);
}
}
return(true);
}
private bool TryMatchLinqQuery(MethodInvocationExpression methodInvocation, out LinqQueryExpression linqQuery)
{
Stack<MethodInvocationExpression> queryStack = new Stack<MethodInvocationExpression>();
MethodInvocationExpression current = methodInvocation;
bool isQueryableMethod = current.MethodExpression.MethodDefinition.IsQueryableMethod();
while (current != null && current.MethodExpression.MethodDefinition.IsQueryMethod() && isQueryableMethod == current.MethodExpression.MethodDefinition.IsQueryableMethod())
{
queryStack.Push(current);
current = current.Arguments[0] as MethodInvocationExpression;
}
if (queryStack.Count == 0)
{
linqQuery = null;
return false;
}
MethodInvocationExpression top = queryStack.Peek();
top.Arguments[0] = (Expression)Visit(top.Arguments[0]);
linqQuery = ProcessExtensionMethodChain(queryStack, methodInvocation, isQueryableMethod);
return linqQuery != null;
}
public override void VisitLinqQueryExpression(LinqQueryExpression node)
{
Indent();
foreach (QueryClause clause in node.Clauses)
{
if (clause.CodeNodeType != CodeNodeType.IntoClause)
{
WriteLine();
}
else
{
WriteSpace();
}
Visit(clause);
}
Outdent();
}
public virtual void VisitLinqQueryExpression(LinqQueryExpression node)
{
foreach (QueryClause clause in node.Clauses)
{
Visit(clause);
}
}
public override ICodeNode VisitLinqQueryExpression(LinqQueryExpression node)
{
return node;
}
private LinqQueryExpression RemoveTransparentIdentifiers(LinqQueryExpression originalQuery)
{
LinqQueryExpression linqQuery = (LinqQueryExpression)originalQuery.Clone();
List<VariableReference> identifiers = new List<VariableReference>();
TransparentIdentifierCleaner cleaner = new TransparentIdentifierCleaner();
HashSet<VariableReference> transparentIdentifiers = new HashSet<VariableReference>();
for (int i = 0; i < linqQuery.Clauses.Count; i++)
{
linqQuery.Clauses[i] = (QueryClause)cleaner.Visit(linqQuery.Clauses[i]);
QueryClause currentClause = linqQuery.Clauses[i];
if (currentClause.CodeNodeType == CodeNodeType.FromClause)
{
identifiers.Add(GetVariableReference((currentClause as FromClause).Identifier));
}
else if (currentClause.CodeNodeType == CodeNodeType.JoinClause)
{
if (linqQuery.Clauses[i + 1].CodeNodeType != CodeNodeType.IntoClause)
{
identifiers.Add(GetVariableReference((currentClause as JoinClause).InnerIdentifier));
}
else
{
identifiers.Add(((IntoClause)linqQuery.Clauses[i + 1]).Identifier.Variable);
i++;
}
}
else if (currentClause.CodeNodeType == CodeNodeType.SelectClause && i != linqQuery.Clauses.Count - 1)
{
VariableReference intoIdentifier = ((IntoClause)linqQuery.Clauses[i + 1]).Identifier.Variable;
if (IsTransparentIdentifier(intoIdentifier))
{
Dictionary<PropertyDefinition, Expression> propertyToValueMap = GetPropertyToValueMap((currentClause as SelectClause).Expression);
if (propertyToValueMap == null)
{
return originalQuery;
}
if (identifiers.Count == 2)
{
if (!RemoveIdentifier(propertyToValueMap, identifiers))
{
return originalQuery;
}
linqQuery.Clauses.RemoveAt(i);
linqQuery.Clauses.RemoveAt(i);
i--;
}
else if (identifiers.Count == 1)
{
LetClause letClause = GenerateLetClause(propertyToValueMap, identifiers[0]);
if (letClause == null)
{
return originalQuery;
}
linqQuery.Clauses[i] = letClause;
linqQuery.Clauses.RemoveAt(i + 1);
}
else
{
return originalQuery;
}
this.methodContext.VariablesToRename.Add(intoIdentifier.Resolve());
transparentIdentifiers.Add(intoIdentifier);
identifiers.Clear();
identifiers.Add(intoIdentifier);
UpdateCleaner(cleaner, intoIdentifier, propertyToValueMap);
}
}
else if (currentClause.CodeNodeType == CodeNodeType.IntoClause)
{
identifiers.Clear();
identifiers.Add(((IntoClause)currentClause).Identifier.Variable);
}
}
TransparentIdentifierFinder finder = new TransparentIdentifierFinder(transparentIdentifiers);
if (finder.ContainsTransparentIdentifiers(linqQuery))
{
return originalQuery;
}
return linqQuery;
}
