private void HandleMapFunction(ConstructorDeclaration ctor, string map)
{
string entityName;
VariableInitializer mapDefinition = map.Trim().StartsWith("from") ?
TransformMapDefinitionFromLinqQuerySyntax(map, out entityName) :
TransformMapDefinitionFromLinqMethodSyntax(map, out entityName);
if (string.IsNullOrEmpty(entityName) == false)
{
//this.ForEntityNames.Add(entityName);
ctor.Body.Statements.Add(new ExpressionStatement(
new InvocationExpression(
new MemberReferenceExpression(
new MemberReferenceExpression(new ThisReferenceExpression(), "ForEntityNames"), "Add"),
new List <Expression> {
new StringLiteralExpression(entityName)
})
));
}
// this.AddMapDefinition(from doc in docs ...);
ctor.Body.Statements.Add(new ExpressionStatement(
new InvocationExpression(
new MemberReferenceExpression(new ThisReferenceExpression(), "AddMapDefinition"),
new List <Expression>
{
new LambdaExpression
{
Parameters =
{
new ParameterDeclaration(null, "docs")
},
Body = mapDefinition.Initializer.Clone()
}
}
)));
if (firstMap)
{
mapDefinition.Initializer.AcceptVisitor(captureSelectNewFieldNamesVisitor, null);
firstMap = false;
}
else
{
var secondMapFieldNames = new CaptureSelectNewFieldNamesVisitor();
mapDefinition.Initializer.AcceptVisitor(secondMapFieldNames, null);
if (secondMapFieldNames.FieldNames.SetEquals(captureSelectNewFieldNamesVisitor.FieldNames) == false)
{
var message = string.Format(@"Map functions defined as part of a multi map index must return identical types.
Baseline map : {0}
Non matching map : {1}
Common fields : {2}
Missing fields : {3}
Additional fields : {4}" , indexDefinition.Maps.First(),
map,
string.Join(", ", captureSelectNewFieldNamesVisitor.FieldNames.Intersect(secondMapFieldNames.FieldNames)),
string.Join(", ", captureSelectNewFieldNamesVisitor.FieldNames.Except(secondMapFieldNames.FieldNames)),
string.Join(", ", secondMapFieldNames.FieldNames.Except(captureSelectNewFieldNamesVisitor.FieldNames))
);
throw new InvalidOperationException(message);
}
}
mapDefinition.Initializer.AcceptVisitor(new ThrowOnInvalidMethodCalls(null), null);
mapDefinition.Initializer.AcceptVisitor(captureQueryParameterNamesVisitorForMap, null);
}
private void TransformQueryToClass()
{
string entityName;
var mapDefinition = TransformMapDefinition(out entityName);
CSharpSafeName = "Index_"+ Regex.Replace(Name, @"[^\w\d]", "_");
var type = new TypeDeclaration(Modifiers.Public, new List<AttributeSection>())
{
BaseTypes =
{
new TypeReference("AbstractViewGenerator")
},
Name = CSharpSafeName,
Type = ClassType.Class
};
var ctor = new ConstructorDeclaration(CSharpSafeName,
Modifiers.Public,
new List<ParameterDeclarationExpression>(), null);
type.Children.Add(ctor);
ctor.Body = new BlockStatement();
//this.ForEntityName = entityName;
ctor.Body.AddChild(new ExpressionStatement(
new AssignmentExpression(
new MemberReferenceExpression(new ThisReferenceExpression(), "ForEntityName"),
AssignmentOperatorType.Assign,
new PrimitiveExpression(entityName, entityName))));
// this.ViewText = "96E65595-1C9E-4BFB-A0E5-80BF2D6FC185"; // Will be replaced later
ctor.Body.AddChild(new ExpressionStatement(
new AssignmentExpression(
new MemberReferenceExpression(new ThisReferenceExpression(), "ViewText"),
AssignmentOperatorType.Assign,
new PrimitiveExpression(mapReduceTextToken, mapReduceTextToken))));
// this.MapDefinition = from doc in docs ...;
ctor.Body.AddChild(new ExpressionStatement(
new AssignmentExpression(
new MemberReferenceExpression(new ThisReferenceExpression(), "MapDefinition"),
AssignmentOperatorType.Assign,
new LambdaExpression
{
Parameters =
{
new ParameterDeclarationExpression(null, "docs")
},
ExpressionBody = mapDefinition.Initializer
})));
var captureSelectNewFieldNamesVisitor = new CaptureSelectNewFieldNamesVisitor();
mapDefinition.Initializer.AcceptVisitor(captureSelectNewFieldNamesVisitor, null);
if(indexDefinition.TransformResults != null)
{
VariableDeclaration translatorDeclaration;
if (indexDefinition.TransformResults.Trim().StartsWith("from"))
{
translatorDeclaration = QueryParsingUtils.GetVariableDeclarationForLinqQuery(indexDefinition.TransformResults, requiresSelectNewAnonymousType:false);
}
else
{
translatorDeclaration = QueryParsingUtils.GetVariableDeclarationForLinqMethods(indexDefinition.TransformResults);
}
// this.Translator = (Database,results) => from doc in results ...;
ctor.Body.AddChild(new ExpressionStatement(
new AssignmentExpression(
new MemberReferenceExpression(new ThisReferenceExpression(), "TransformResultsDefinition"),
AssignmentOperatorType.Assign,
new LambdaExpression
{
Parameters =
{
new ParameterDeclarationExpression(null, "Database"),
new ParameterDeclarationExpression(null, "results")
},
ExpressionBody = translatorDeclaration.Initializer
})));
}
if (indexDefinition.IsMapReduce)
{
VariableDeclaration reduceDefiniton;
Expression groupBySource;
string groupByParamter;
if (indexDefinition.Reduce.Trim().StartsWith("from"))
{
reduceDefiniton = QueryParsingUtils.GetVariableDeclarationForLinqQuery(indexDefinition.Reduce, RequiresSelectNewAnonymousType);
var sourceSelect = (QueryExpression)((QueryExpression)reduceDefiniton.Initializer).FromClause.InExpression;
groupBySource = ((QueryExpressionGroupClause)sourceSelect.SelectOrGroupClause).GroupBy;
groupByParamter = sourceSelect.FromClause.Identifier;
}
else
{
reduceDefiniton = QueryParsingUtils.GetVariableDeclarationForLinqMethods(indexDefinition.Reduce);
var invocation = ((InvocationExpression) reduceDefiniton.Initializer);
var target = (MemberReferenceExpression) invocation.TargetObject;
while(target.MemberName!="GroupBy")
{
invocation = (InvocationExpression) target.TargetObject;
target = (MemberReferenceExpression)invocation.TargetObject;
}
var lambdaExpression = ((LambdaExpression)invocation.Arguments[0]);
groupByParamter = lambdaExpression.Parameters[0].ParameterName;
groupBySource = lambdaExpression.ExpressionBody;
}
captureSelectNewFieldNamesVisitor.FieldNames.Clear();// reduce override the map fields
reduceDefiniton.Initializer.AcceptVisitor(captureSelectNewFieldNamesVisitor, null);
// this.ReduceDefinition = from result in results...;
ctor.Body.AddChild(new ExpressionStatement(
new AssignmentExpression(
new MemberReferenceExpression(new ThisReferenceExpression(),
"ReduceDefinition"),
AssignmentOperatorType.Assign,
new LambdaExpression
{
Parameters =
{
new ParameterDeclarationExpression(null, "results")
},
ExpressionBody = reduceDefiniton.Initializer
})));
ctor.Body.AddChild(new ExpressionStatement(
new AssignmentExpression(
new MemberReferenceExpression(new ThisReferenceExpression(),
"GroupByExtraction"),
AssignmentOperatorType.Assign,
new LambdaExpression
{
Parameters =
{
new ParameterDeclarationExpression(null, groupByParamter)
},
ExpressionBody = groupBySource
})));
}
foreach (var fieldName in captureSelectNewFieldNamesVisitor.FieldNames)
{
ctor.Body.AddChild(
new ExpressionStatement(
new InvocationExpression(
new MemberReferenceExpression(
new ThisReferenceExpression(),
"AddField"
),
new List<Expression> { new PrimitiveExpression(fieldName, fieldName) }
)
)
);
}
CompiledQueryText = QueryParsingUtils.GenerateText(type, extensions);
var compiledQueryText = "@\"" + indexDefinition.Map.Replace("\"", "\"\"");
if (indexDefinition.Reduce != null)
{
compiledQueryText += Environment.NewLine + indexDefinition.Reduce.Replace("\"", "\"\"");
}
if (indexDefinition.TransformResults != null)
{
compiledQueryText += Environment.NewLine + indexDefinition.TransformResults.Replace("\"", "\"\"");
}
compiledQueryText += "\"";
CompiledQueryText = CompiledQueryText.Replace("\"" + mapReduceTextToken + "\"",
compiledQueryText);
}