private Func <ParameterExpression, Expression> CloneListElementDelegate(IExpressionBuilder expressionBuilder, CloneExpressionContext context)
{
Type elementType = context
.SourceEntity
.Type
.GenericTypeArguments
.Single();
PropertyInfo indexProperty = typeof(IList <>)
.MakeGenericType(elementType)
.GetProperty(IndexPropertyName);
MethodInfo addMethod = typeof(ICollection <>)
.MakeGenericType(elementType)
.GetMethod(nameof(ICollection <object> .Add));
if (PrimitiveTypes.Contains(elementType))
{
return (iterator) =>
{
Expression getElementExpression = ExpressionFactory.Call(context.SourceEntity, indexProperty.GetMethod, iterator);
return ExpressionFactory.Call(context.TargetEntity, addMethod, getElementExpression);
}
}
;
else
{
return (iterator) =>
{
Expression getElementExpression = ExpressionFactory.Call(context.SourceEntity, indexProperty.GetMethod, iterator);
MethodInfo cloneMethod = CloneMethod.MakeGenericMethod(elementType);
Expression clonedElement = ExpressionFactory.Call(context.CloneFactory, cloneMethod, getElementExpression);
return ExpressionFactory.Call(context.TargetEntity, addMethod, clonedElement);
}
};
}
private Func <ParameterExpression, Expression> CloneArrayElementDelegate(CloneExpressionContext context)
{
Type elementType = context
.SourceEntity
.Type
.GetElementType();
PropertyInfo indexProperty = typeof(IList <>)
.MakeGenericType(elementType)
.GetProperty(IndexPropertyName);
if (PrimitiveTypes.Contains(elementType))
{
return (iterator) =>
{
Expression getElementExpression = ExpressionFactory.Call(context.SourceEntity, indexProperty.GetMethod, iterator);
return ExpressionFactory.Call(context.TargetEntity, indexProperty.SetMethod, iterator, getElementExpression);
}
}
;
else
{
return (iterator) =>
{
Expression getElementExpression = ExpressionFactory.Call(context.SourceEntity, indexProperty.GetMethod, iterator);
MethodInfo cloneMethod = CloneMethod.MakeGenericMethod(elementType);
Expression clonedElement = ExpressionFactory.Call(context.CloneFactory, cloneMethod, getElementExpression);
return ExpressionFactory.Call(context.TargetEntity, indexProperty.SetMethod, iterator, clonedElement);
}
};
}
private void AddArrayExpressions <TEntity>(IExpressionBuilder expressionBuilder, CloneExpressionContext context)
{
context.TargetEntity = expressionBuilder.CreateObject <TEntity>(
nameof(CloneExpressionContext.TargetEntity),
new[] { typeof(int) },
new[] { ExpressionFactory.Call(context.SourceEntity, ArrayLengthProperty.GetMethod) });
expressionBuilder.For(context.SourceEntity, CloneArrayElementDelegate(context));
}
private void ClonePrimitiveProperty(IExpressionBuilder expressionBuilder, CloneExpressionContext parameters, PropertyInfo property)
{
Expression sourceValue = ExpressionFactory.Call(parameters.SourceEntity, property.GetMethod);
expressionBuilder.SetProperty(
parameters.TargetEntity,
property,
sourceValue);
}
private void CloneComplexProperty(IExpressionBuilder expressionBuilder, CloneExpressionContext parameters, PropertyInfo property)
{
MethodInfo cloneMethod = CloneMethod.MakeGenericMethod(property.PropertyType);
Expression complexValue = ExpressionFactory.Call(parameters.SourceEntity, property.GetMethod);
Expression subClone = ExpressionFactory.Call(parameters.CloneFactory, cloneMethod, complexValue);
expressionBuilder.SetProperty(
parameters.TargetEntity,
property,
subClone);
}
public void CallIsExpected()
{
Expression actual = TestObject.Call(TestParameterOne, TestMethod);
Assert.IsInstanceOfType(actual, typeof(MethodCallExpression));
MethodCallExpression actualExpression = (MethodCallExpression)actual;
Assert.AreEqual(TestParameterOne, actualExpression.Object);
Assert.AreEqual(TestMethod, actualExpression.Method);
Assert.AreEqual(0, actualExpression.Arguments.Count);
}
private void AddListExpressions <TEntity>(IExpressionBuilder expressionBuilder, CloneExpressionContext context)
{
PropertyInfo listCountProperty = context
.SourceEntity
.Type
.GetProperty(nameof(List <TEntity> .Count));
context.TargetEntity = expressionBuilder.CreateObject <TEntity>(
nameof(CloneExpressionContext.TargetEntity),
new[] { typeof(int) },
new[] { ExpressionFactory.Call(context.SourceEntity, listCountProperty.GetMethod) });
expressionBuilder.For(context.SourceEntity, CloneListElementDelegate(expressionBuilder, context));
}