public void Apply(MappingStrategy strategy, MappingStrategyBuildContext context)
{
foreach (var pattern in mappingPatterns)
{
pattern.Contribute(strategy);
}
}
public void Apply(MappingStrategy strategy, MappingStrategyBuildContext context)
{
foreach (var mappingStep in strategy.MappingSteps)
{
mappingStep.Conversion = context.ApplyConverter(mappingStep, withFallback: true);
}
}
static LambdaExpression GenerateLambda(MappingStrategy strategy, List<Expression> body)
{
var lambda = Expression.Lambda(Expression.Block(new[] { strategy.TargetExpression, strategy.SourceExpression }, body),
string.Format("{0} to {1} Converter", strategy.Source.Name, strategy.Target.Name),
new[] { strategy.ContextExpression });
return lambda;
}
public DelegatingConversionVisitor(MappingStrategy strategy, ParameterExpression sourceValueParameter, ParameterExpression mapperParameter, ParameterExpression contextParameter)
{
this.strategy = strategy;
this.sourceValueParameter = sourceValueParameter;
this.mapperParameter = mapperParameter;
this.contextParameter = contextParameter;
}
static void InitSource(MappingStrategy strategy, List <Expression> body)
{
var step = Expression.Assign(strategy.SourceExpression, Expression.Convert(Expression.Property(strategy.ContextExpression, MappingContextMeta.SourceInstance), strategy.Source));
// we don't describe source. It gets cast from the source to its actual type but that's not interesting and only adds noise to the mapping
body.Add(step);
}
public void Apply(MappingStrategy strategy, MappingStrategyBuildContext context)
{
if (strategy.HasTargetInstance)
{
strategy.InitTargetStep = new SimpleStep(strategy.Target, strategy.Target, (s, _) => Expression.Convert(Expression.Property(s.ContextExpression, MappingContextMeta.TargetInstance), s.Target));
}
else
{
if (strategy.TargetConstructor == null)
{
throw new ArgumentException("Constructor not set. This exception message is a work in progress");
}
if (strategy.ConstructorParameterMappingSteps == null)
{
throw new ArgumentException("ConstructorParameterMappingSteps not set. This exception message is a work in progress");
}
foreach (var mappingStep in strategy.ConstructorParameterMappingSteps.ByKey)
{
if (mappingStep.Value == null)
{
throw new InvalidOperationException(String.Format("No mapping for constructor parameter {0} has been specified. All constructor parameters need value", mappingStep.Key));
}
mappingStep.Value.Conversion = context.ApplyConverter(mappingStep.Value, withFallback: true);
}
strategy.InitTargetStep = new SimpleStep(strategy.Target, strategy.Target, (s, _) => Expression.New(s.TargetConstructor, GetConstructorParameters(s)));
}
}
static void InitTarget(MappingStrategy strategy, List <Expression> body)
{
var step = Expression.Assign(strategy.TargetExpression, TargetInstanceExpression(strategy));
strategy.Descriptor.DescribeStep(step);
body.Add(step);
}
public void Contribute(MappingStrategy strategy)
{
var properties = strategy.Source.GetProperties();
foreach (var targetProperty in strategy.Target.GetProperties())
{
var sourceProperty = Array.Find(properties, p => p.Name == targetProperty.Name);
if (sourceProperty != null)
{
var assign = new Assign(targetProperty, sourceProperty);
strategy.AddMappingStep(assign);
}
}
foreach (var mappingStep in strategy.ConstructorParameterMappingSteps.ByKey)
{
if (mappingStep.Value == null)
{
var sourceProperty = Array.Find(properties, p => string.Equals(p.Name, mappingStep.Key.Name, StringComparison.OrdinalIgnoreCase));
if (sourceProperty != null)
{
var assign = new ConstructorAssign(mappingStep.Key, sourceProperty);
mappingStep.UpdateValue(assign);
}
}
}
}
static LambdaExpression GenerateLambda(MappingStrategy strategy, List <Expression> body)
{
var lambda = Expression.Lambda(Expression.Block(new[] { strategy.TargetExpression, strategy.SourceExpression }, body),
string.Format("{0} to {1} Converter", strategy.Source.Name, strategy.Target.Name),
new[] { strategy.ContextExpression });
return(lambda);
}
public override Expression BuildConversionExpression(MappingStrategy context, MappingStep step)
{
var from = step.SourceValueType.GetArrayItemType();
var to = step.TargetValueType.GetArrayItemType();
Debug.Assert(from != null);
Debug.Assert(to != null);
return Expression.Call(MapCollection.MakeGenericMethod(from, to), context.ValueExpression, context.ContextExpression);
}
public override Expression Apply(MappingStrategy strategy, ConversionStep conversion)
{
if (nullableProperties == null)
{
var value = sourcePropertyChain.Aggregate<PropertyInfo, Expression>(strategy.SourceExpression, Expression.Property);
return SetValue(strategy, conversion, value);
}
return BuildBody(Expression.Property(strategy.SourceExpression, sourcePropertyChain[0]), 0, strategy, conversion);
}
public override Expression BuildConversionExpression(MappingStrategy context, MappingStep step)
{
var callExpression = (MethodCallExpression)blueprint.Body;
if (step.TargetValueType == typeof (object))
{
return callExpression;
}
var method = callExpression.Method.GetGenericMethodDefinition().MakeGenericMethod(step.TargetValueType);
return Expression.Call(context.MapperExpression, method, context.ValueExpression);
}
static void GenerateMapping(MappingStrategy strategy, List <Expression> body)
{
foreach (var step in strategy.MappingSteps)
{
var map = step.Apply(strategy, step.Conversion);
strategy.Descriptor.DescribeStep(map);
body.Add(map);
}
body.Add(strategy.TargetExpression);
}
public Delegate Compile(MappingStrategy strategy)
{
var body = new List<Expression>();
InitDescriptor(strategy);
InitSource(strategy, body);
InitTarget(strategy, body);
GenerateMapping(strategy, body);
var lambda = GenerateLambda(strategy, body);
return lambda.Compile();
}
public void Apply(MappingStrategy strategy, MappingStrategyBuildContext context)
{
var directMappingStep = new DirectMappingStep(strategy.Source, strategy.Target);
var converter = context.ApplyConverter(directMappingStep, withFallback: false);
if (converter != null)
{
directMappingStep.Conversion = converter;
strategy.InitTargetStep = directMappingStep;
context.MarkAsCompleted();
}
}
public void Contribute(MappingStrategy strategy)
{
foreach (var targetProperty in strategy.Target.GetProperties())
{
var sourcePropertyChain = BuildPropertyChain(targetProperty, strategy.Source.GetProperties());
if (sourcePropertyChain.Length > 1)
{
strategy.AddMappingStep(new AssignChain(targetProperty, sourcePropertyChain));
}
}
}
public override Expression Apply(MappingStrategy strategy, ConversionStep conversion)
{
var get = Expression.Property(strategy.SourceExpression, sourceProperty);
strategy.ValueExpression = get;
if (conversion != null)
{
var convert = conversion.BuildConversionExpression(strategy);
strategy.ValueExpression = convert;
}
var property = Expression.Property(strategy.TargetExpression, targetProperty);
return Expression.Assign(property, strategy.ValueExpression);
}
public void Contribute(MappingStrategy strategy)
{
foreach (var targetProperty in strategy.Target.GetProperties())
{
var sourceProperty = strategy.Source.GetProperties().FirstOrDefault(p => p.Name == targetProperty.Name);
if (sourceProperty != null)
{
var assign = new Assign(targetProperty, sourceProperty);
strategy.AddMappingStep(assign);
}
}
}
public MappingStrategy BuildMappingStrategy(Type source, Type target)
{
var strategy = new MappingStrategy(source, target, descriptor);
foreach (var pattern in mappingPatterns)
{
pattern.Contribute(strategy);
}
foreach (var mappingStep in strategy.MappingSteps)
{
ApplyConverter(mappingStep);
}
return strategy;
}
public Delegate Compile(MappingStrategy strategy)
{
var body = new List <Expression>();
InitDescriptor(strategy);
InitSource(strategy, body);
InitTarget(strategy, body);
GenerateMapping(strategy, body);
var lambda = GenerateLambda(strategy, body);
var reduced = new ReduceExpressionVisitor().Reduce(lambda);
return(reduced.Compile());
}
public void Apply(MappingStrategy strategy, MappingStrategyBuildContext context)
{
if (strategy.HasTargetInstance)
{
return;
}
var ctors = strategy.Target.GetConstructors();
if (ctors.Length != 1)
{
return;
}
strategy.TargetConstructor = ctors.Single();
strategy.ConstructorParameterMappingSteps = new OrderedKeyedCollection<ParameterInfo, MappingStep>(strategy.TargetConstructor.GetParameters());
}
public void Contribute(MappingStrategy strategy)
{
foreach (var targetProperty in strategy.Target.GetProperties().Where(p => p.Name.EndsWith(targetPropertyNameSuffix, StringComparison.OrdinalIgnoreCase)))
{
var expectedName = GetExpectedName(targetProperty);
var sourceProperty = strategy.Source.GetProperties().FirstOrDefault(p => p.Name == expectedName);
if (sourceProperty != null)
{
var assign = new Assign(targetProperty, sourceProperty);
strategy.AddMappingStep(assign);
}
}
}
public void Contribute(MappingStrategy strategy)
{
if (strategy.ConstructorParameterMappingSteps == null)
{
return;
}
foreach (var mappingStep in strategy.ConstructorParameterMappingSteps.ByKey)
{
if (mappingStep.Value == null)
{
var assign = new SimpleStep(mappingStep.Key.ParameterType, mappingStep.Key.ParameterType,
(s, c) => Expression.Call(s.ContextExpression, MappingContextMeta.Argument.MakeGenericMethod(mappingStep.Key.ParameterType)));
mappingStep.UpdateValue(assign);
}
}
}
public override Expression BuildGetSourceValueExpression(MappingStrategy context)
{
if (nullableProperties == null)
{
return sourcePropertyChain.Aggregate<PropertyInfo, Expression>(context.SourceExpression, Expression.Property);
}
var localTarget = Expression.Variable(TargetValueType, "__value");
var body = new[]
{
Expression.Assign(localTarget, Expression.Default(TargetValueType)),
BuildBody(0, context.SourceExpression, localTarget),
localTarget
};
var result = Expression.Block(new[] { localTarget }, body);
return result;
}
static void GenerateMapping(MappingStrategy strategy, List<Expression> body)
{
foreach (var step in strategy.MappingSteps)
{
var get = step.BuildGetSourceValueExpression(strategy);
strategy.ValueExpression = get;
if (step.Conversion != null)
{
var convert = step.Conversion.BuildConversionExpression(strategy, step);
strategy.ValueExpression = convert;
}
var set = step.BuildSetTargetValueExpression(strategy);
strategy.Descriptor.DescribeStep(set);
body.Add(set);
}
body.Add(strategy.TargetExpression);
}
Expression BuildBody(Expression owner, int index, MappingStrategy strategy, ConversionStep conversion)
{
if (index == sourcePropertyChain.Length - 1)
{
return SetValue(strategy, conversion, owner);
}
if (nullableProperties.Contains(sourcePropertyChain[index]) == false)
{
return BuildBody(Expression.Property(owner, sourcePropertyChain[index + 1]), index + 1, strategy, conversion);
}
var local = Expression.Variable(owner.Type);
var property = new PropertyIfNotNullInnerExpression(Expression.Property(local, sourcePropertyChain[index + 1]));
var body = BuildBody(property, index + 1, strategy, conversion);
var expression = new PropertyIfNotNullExpression(owner, body, local, TargetValueType);
property.Owner = expression;
return expression;
}
public MappingStrategy BuildMappingStrategy(MappingInfo mappingInfo)
{
var strategy = new MappingStrategy(mappingInfo, descriptor);
//first try to shortcircuit
var directMappingStep = new DirectMappingStep(strategy.Source, strategy.Target);
var converter = ApplyConverter(directMappingStep, withFallback: false);
if (converter != null)
{
directMappingStep.Conversion = converter;
strategy.InitTargetStep = directMappingStep;
return(strategy);
}
foreach (var pattern in mappingPatterns)
{
pattern.Contribute(strategy);
}
foreach (var mappingStep in strategy.MappingSteps)
{
mappingStep.Conversion = ApplyConverter(mappingStep, withFallback: true);
}
if (strategy.HasTargetInstance)
{
strategy.InitTargetStep = new SimpleStep(strategy.Target, strategy.Target, (s, _) => Expression.Convert(Expression.Property(s.ContextExpression, MappingContextMeta.TargetInstance), s.Target));
}
else
{
foreach (var mappingStep in strategy.ConstructorParameterMappingSteps.ByKey)
{
if (mappingStep.Value == null)
{
throw new InvalidOperationException(string.Format("No mapping for constructor parameter {0} has been specified. All constructor parameters need value", mappingStep.Key));
}
mappingStep.Value.Conversion = ApplyConverter(mappingStep.Value, withFallback: true);
}
strategy.InitTargetStep = new SimpleStep(strategy.Target, strategy.Target, (s, _) => Expression.New(s.TargetConstructor, GetConstructorParameters(s)));
}
return(strategy);
}
public MappingStrategy BuildMappingStrategy(MappingInfo mappingInfo)
{
var strategy = new MappingStrategy(mappingInfo, descriptor);
//first try to shortcircuit
var directMappingStep = new DirectMappingStep(strategy.Source, strategy.Target);
var converter = ApplyConverter(directMappingStep, withFallback: false);
if (converter != null)
{
directMappingStep.Conversion = converter;
strategy.InitTargetStep = directMappingStep;
return strategy;
}
foreach (var pattern in mappingPatterns)
{
pattern.Contribute(strategy);
}
foreach (var mappingStep in strategy.MappingSteps)
{
mappingStep.Conversion = ApplyConverter(mappingStep, withFallback: true);
}
if (strategy.HasTargetInstance)
{
strategy.InitTargetStep = new SimpleStep(strategy.Target, strategy.Target, (s, _) => Expression.Convert(Expression.Property(s.ContextExpression, MappingContextMeta.TargetInstance), s.Target));
}
else
{
foreach (var mappingStep in strategy.ConstructorParameterMappingSteps.ByKey)
{
if (mappingStep.Value == null)
{
throw new InvalidOperationException(string.Format("No mapping for constructor parameter {0} has been specified. All constructor parameters need value", mappingStep.Key));
}
mappingStep.Value.Conversion = ApplyConverter(mappingStep.Value, withFallback: true);
}
strategy.InitTargetStep = new SimpleStep(strategy.Target, strategy.Target, (s, _) => Expression.New(s.TargetConstructor, GetConstructorParameters(s)));
}
return strategy;
}
public void Contribute(MappingStrategy strategy)
{
var sourceProperties = strategy.Source.GetProperties();
foreach (var targetProperty in strategy.Target.GetProperties())
{
var sourcePropertyChain = BuildPropertyChain(targetProperty.Name, sourceProperties);
if (sourcePropertyChain.Length > 1)
{
strategy.AddMappingStep(new AssignChain(targetProperty, sourcePropertyChain));
}
}
foreach (var mappingStep in strategy.ConstructorParameterMappingSteps.ByKey)
{
if (mappingStep.Value == null)
{
var targetParameter = mappingStep.Key;
var sourcePropertyChain = BuildPropertyChain(targetParameter.Name, sourceProperties);
if (sourcePropertyChain.Length > 1)
{
mappingStep.UpdateValue(new ConstructorAssignChain(mappingStep.Key, sourcePropertyChain));
}
}
}
}
public override Expression BuildSetTargetValueExpression(MappingStrategy context)
{
var property = Expression.Property(context.TargetExpression, targetProperty);
return Expression.Assign(property, context.ValueExpression);
}
public abstract Expression Apply(MappingStrategy strategy, ConversionStep conversion);
static Expression BuildParameterExpression(MappingStep step, MappingStrategy strategy)
{
var map = step.Apply(strategy, step.Conversion);
return(map);
}
static Expression[] GetConstructorParameters(MappingStrategy strategy)
{
return(strategy.ConstructorParameterMappingSteps.Select(s => BuildParameterExpression(s, strategy)).ToArray());
}
static Expression BuildParameterExpression(MappingStep step, MappingStrategy strategy)
{
var map = step.Apply(strategy, step.Conversion);
return map;
}
public abstract Expression BuildConversionExpression(MappingStrategy context, MappingStep step);
static Expression[] GetConstructorParameters(MappingStrategy strategy)
{
return strategy.ConstructorParameterMappingSteps.Select(s => BuildParameterExpression(s, strategy)).ToArray();
}
void InitDescriptor(MappingStrategy strategy)
{
strategy.Descriptor.DescribeMapping(strategy.Source, strategy.Target);
}
public override Expression Apply(MappingStrategy strategy, ConversionStep conversion)
{
return apply(strategy, conversion);
}
static Expression TargetInstanceExpression(MappingStrategy strategy)
{
return(strategy.InitTargetStep.Apply(strategy, strategy.InitTargetStep.Conversion));
}
Expression SetValue(MappingStrategy strategy, ConversionStep conversion, Expression value)
{
strategy.ValueExpression = value;
if (conversion != null)
{
var convert = conversion.BuildConversionExpression(strategy);
strategy.ValueExpression = convert;
}
return BuildSetTargetValueExpression(strategy);
}