/// <summary>
/// Finds matching dependencies for a given method by walking through the IL instructions.
/// </summary>
private void CheckMethod(TypeDefinition type, MethodDefinition method, ref SearchDefinition results)
{
// Check the return type
if (method.ReturnType.ContainsGenericParameter)
{
CheckGenericParameters(type, method.ReturnType.GenericParameters, ref results);
}
if (results.GetAllMatchingDependencies(method.ReturnType.FullName).Any())
{
results.AddToFound(type, method.ReturnType.FullName);
}
// Check for any generic parameters
if (method.ContainsGenericParameter)
{
CheckGenericParameters(type, method.GenericParameters, ref results);
}
if (method.HasParameters)
{
CheckParameters(type, method.Parameters, ref results);
}
// Check the contents of the method body
CheckMethodBody(type, method, ref results);
}
/// <summary>
/// Finds types that have a dependency on every items in a given list of dependencies.
/// </summary>
/// <param name="input">The set of type definitions to search.</param>
/// <param name="dependencies">The set of dependencies to look for.</param>
/// <returns>A list of dependencies found in the input classes.</returns>
internal IReadOnlyList <TypeDefinition> FindTypesWithAllDependencies(IEnumerable <TypeDefinition> input, IEnumerable <string> dependencies)
{
// Set up the search definition
var results = new SearchDefinition(dependencies);
// Check each type in turn
foreach (var type in input)
{
CheckType(type, ref results);
}
var output = new List <TypeDefinition>();
foreach (var typeFound in results.TypesFound)
{
// NB: Nested classes won't be picked up here
var match = input.FirstOrDefault(d => d.FullName.Equals(typeFound, StringComparison.InvariantCultureIgnoreCase));
if (match != null &&
results.GetAllDependenciesMatchingAnyOf(results.GetDependenciesFoundForType(typeFound)).Count() == results.UniqueDependenciesCount)
{
// Check found
output.Add(match);
}
}
return(output);
}
/// <summary>
/// Finds matching dependencies for a given type by walking through the type contents.
/// </summary>
private void CheckType(TypeDefinition type, ref SearchDefinition results)
{
// Have we already checked this type?
if (results.IsChecked(type))
{
return;
}
// Add the current type to the checked list - this prevents any circular checks
results.AddToChecked(type);
// Does this directly inherit from a dependency?
var baseClass = type.BaseType?.Resolve();
if (baseClass != null)
{
foreach (var dependency in results.SearchList)
{
if (baseClass.FullName.StartsWith(dependency, StringComparison.InvariantCultureIgnoreCase))
{
results.AddToFound(type, dependency);
}
}
}
// Check the properties
CheckProperties(type, ref results);
// Check the generic parameters for the type
if (type.HasGenericParameters)
{
CheckGenericParameters(type, type.GenericParameters, ref results);
}
// Check the fields
CheckFields(type, ref results);
// Check the events
CheckEvents(type, ref results);
// Check the nested types
foreach (var nested in type.NestedTypes)
{
this.CheckType(nested, ref results);
}
// Check each method
foreach (var method in type.Methods)
{
this.CheckMethod(type, method, ref results);
}
}
/// <summary>
/// Finds matching dependencies for a given method by walking through the events.
/// </summary>
private void CheckEvents(TypeDefinition type, ref SearchDefinition results)
{
if (type.HasEvents)
{
foreach (var eventDef in type.Events)
{
if (eventDef.HasOtherMethods)
{
foreach (var method in eventDef.OtherMethods)
{
CheckMethod(type, method, ref results);
}
}
}
}
}
/// <summary>
/// Finds types that have a dependency on every items in a given list of dependencies.
/// </summary>
/// <param name="input">The set of type definitions to search.</param>
/// <param name="dependencies">The set of dependencies to look for.</param>
/// <returns>A list of dependencies found in the input classes.</returns>
internal IReadOnlyList <TypeDefinition> FindTypesWithAllDependencies(IEnumerable <TypeDefinition> input, IEnumerable <string> dependencies)
{
var output = new List <TypeDefinition>();
var found = new List <string>();
var start = true;
foreach (var dependency in dependencies)
{
if (start || found.Count > 0)
{
// Set up the search definition
var results = new SearchDefinition(new string[] { dependency });
// Check each type in turn
foreach (var type in input)
{
CheckType(type, ref results);
}
if (start)
{
// Kick off the list of types that we have found
found = results.TypesFound.ToList();
start = false;
}
else
{
// Only select items that appear in both lists
found = found.Where(r => results.TypesFound.Contains(r)).ToList();
}
}
}
foreach (var typeFound in found)
{
// NB: Nested classes won't be picked up here
var match = input.FirstOrDefault(d => d.FullName.Equals(typeFound, StringComparison.InvariantCultureIgnoreCase));
if (match != null)
{
output.Add(match);
}
}
return(output);
}
/// <summary>
/// Finds matching dependencies for a given method by walking through the fields.
/// </summary>
private void CheckFields(TypeDefinition type, ref SearchDefinition results)
{
if (type.HasFields)
{
foreach (var field in type.Fields)
{
// The field could be a generic property
if (field.ContainsGenericParameter)
{
CheckParameters(type, field.FieldType.GenericParameters, ref results);
}
if (results.GetAllMatchingDependencies(field.FieldType.FullName).Any())
{
results.AddToFound(type, field.FieldType.FullName);
}
}
}
}
/// <summary>
/// Finds matching dependencies for a given method by walking through the fields.
/// </summary>
private void CheckFields(TypeDefinition type, ref SearchDefinition results)
{
if (type.HasFields)
{
foreach (var field in type.Fields)
{
// The field could be a generic property
if (field.ContainsGenericParameter)
{
CheckGenericParameters(type, field.FieldType.GenericParameters, ref results);
}
if (results.SearchList.Any(m => field.FieldType.FullName.StartsWith(m)))
{
results.AddToFound(type, field.FieldType.FullName);
}
}
}
}
/// <summary>
/// Finds matching dependencies for a given method by walking through the properties.
/// </summary>
private void CheckProperties(TypeDefinition type, ref SearchDefinition results)
{
if (type.HasProperties)
{
foreach (var property in type.Properties)
{
// The property could be a generic property
if (property.ContainsGenericParameter)
{
CheckParameters(type, property.PropertyType.GenericParameters, ref results);
}
// Check the property type
if (results.GetAllMatchingDependencies(property.PropertyType.FullName).Any())
{
results.AddToFound(type, property.PropertyType.FullName);
}
}
}
}
/// <summary>
/// Finds matching dependencies for a given method by walking through the properties.
/// </summary>
private void CheckProperties(TypeDefinition type, ref SearchDefinition results)
{
if (type.HasProperties)
{
foreach (var property in type.Properties)
{
// The property could be a generic property
if (property.ContainsGenericParameter)
{
CheckGenericParameters(type, property.PropertyType.GenericParameters, ref results);
}
// Check the property type
if (results.SearchList.Any(m => property.PropertyType.FullName.StartsWith(m)))
{
results.AddToFound(type, property.PropertyType.FullName);
}
}
}
}
/// <summary>
/// Finds matching dependencies for a given method by scanning the code.
/// </summary>
private void CheckMethodBody(TypeDefinition type, MethodDefinition method, ref SearchDefinition results)
{
if (method.HasBody)
{
foreach (var variable in method.Body.Variables)
{
// Check any nested types in methods - the compiler will create one for every asynchronous method or iterator.
if (variable.VariableType.IsNested)
{
CheckType(variable.VariableType.Resolve(), ref results);
}
else
{
if (variable.VariableType.ContainsGenericParameter)
{
CheckParameters(type, variable.VariableType.GenericParameters, ref results);
}
if (results.GetAllMatchingDependencies(variable.VariableType.FullName).Any())
{
results.AddToFound(type, variable.VariableType.FullName);
}
}
}
// Check each instruction for references to our types
foreach (var instruction in method.Body.Instructions)
{
if (instruction.Operand != null)
{
var operands = ExtractTypeNames(instruction.Operand.ToString());
var matches = results.GetAllDependenciesMatchingAnyOf(operands);
foreach (var item in matches)
{
results.AddToFound(type, item);
}
}
}
}
}
/// <summary>
/// Finds matching dependencies for a given method by scanning the code.
/// </summary>
private void CheckMethodBody(TypeDefinition type, MethodDefinition method, ref SearchDefinition results)
{
if (method.HasBody)
{
foreach (var variable in method.Body.Variables)
{
// Check any nested types in methods - the compiler will create one for every asynchronous method or iterator.
if (variable.VariableType.IsNested)
{
CheckType(variable.VariableType.Resolve(), ref results);
}
else
{
if (variable.VariableType.ContainsGenericParameter)
{
CheckGenericParameters(type, variable.VariableType.GenericParameters, ref results);
}
if (results.SearchList.Any(m => variable.VariableType.FullName.StartsWith(m)))
{
results.AddToFound(type, variable.VariableType.FullName);
}
}
}
// Check each instruction for references to our types
foreach (var instruction in method.Body.Instructions)
{
if (instruction.Operand != null)
{
var operand = instruction.Operand.ToString();
var matches = results.SearchList.Where(m => operand.Contains(m)).ToArray();
foreach (var item in matches)
{
results.AddToFound(type, item);
}
}
}
}
}
/// <summary>
/// Finds matching dependencies for a given method by walking through the IL instructions.
/// </summary>
private void CheckMethod(TypeDefinition type, MethodDefinition method, ref SearchDefinition results)
{
// Check the return type
if (method.ReturnType.ContainsGenericParameter)
{
CheckGenericParameters(type, method.ReturnType.GenericParameters, ref results);
}
if (results.SearchList.Any(m => method.ReturnType.FullName.StartsWith(m)))
{
results.AddToFound(type, method.ReturnType.FullName);
}
// Check for any generic parameters
if (method.ContainsGenericParameter)
{
CheckGenericParameters(type, method.GenericParameters, ref results);
}
// Check the contents of the method body
CheckMethodBody(type, method, ref results);
}
/// <summary>
/// Finds matching dependencies for a given method by walking through the IL instructions.
/// </summary>
private void CheckMethod(TypeDefinition type, MethodDefinition method, ref SearchDefinition results)
{
// Check the return type
if (method.ReturnType.ContainsGenericParameter)
{
CheckParameters(type, method.ReturnType.GenericParameters, ref results);
}
if (method.ReturnType.IsGenericInstance)
{
var returnTypeAsGenericInstance = method.ReturnType as GenericInstanceType;
if (returnTypeAsGenericInstance.HasGenericArguments)
{
CheckParameters(type, returnTypeAsGenericInstance.GenericArguments, ref results);
}
}
if (results.GetAllMatchingDependencies(method.ReturnType.FullName).Any())
{
results.AddToFound(type, method.ReturnType.FullName);
}
// Check for any generic parameters
if (method.ContainsGenericParameter)
{
CheckParameters(type, method.GenericParameters, ref results);
}
if (method.HasParameters)
{
CheckParameters(type, method.Parameters.Select(x => x.ParameterType), ref results);
}
// Check the contents of the method body
CheckMethodBody(type, method, ref results);
}
/// <summary>
/// Finds matching dependencies for a set of generic parameters
/// </summary>
private static void CheckGenericParameters(TypeDefinition type, IEnumerable <GenericParameter> parameters, ref SearchDefinition results)
{
foreach (var generic in parameters)
{
if (results.SearchList.Any(m => generic.FullName.StartsWith(m)))
{
results.AddToFound(type, generic.FullName);
}
}
}
/// <summary>
/// Finds matching dependencies for a set of generic or not parameters
/// </summary>
private void CheckParameters(TypeDefinition type, IEnumerable <TypeReference> parameters, ref SearchDefinition results)
{
foreach (var parameter in parameters)
{
if (IsTypeGeneric(parameter.FullName))
{
var types = ExtractTypeNames(parameter.FullName);
var matches = results.GetAllDependenciesMatchingAnyOf(types);
foreach (var item in matches)
{
results.AddToFound(type, item);
}
}
else
{
if (results.GetAllMatchingDependencies(parameter.FullName).Any())
{
results.AddToFound(type, parameter.FullName);
}
}
}
}
/// <summary>
/// Finds matching dependencies for a set of generic parameters
/// </summary>
private static void CheckGenericParameters(TypeDefinition type, IEnumerable <GenericParameter> parameters, ref SearchDefinition results)
{
foreach (var generic in parameters)
{
if (results.GetAllMatchingDependencies(generic.FullName).Any())
{
results.AddToFound(type, generic.FullName);
}
}
}
private void CheckParameters(TypeDefinition type, IEnumerable <ParameterDefinition> parameters, ref SearchDefinition results)
{
foreach (var parameter in parameters)
{
string fullName = parameter.ParameterType?.FullName ?? String.Empty;
if (results.GetAllMatchingDependencies(fullName).Any())
{
results.AddToFound(type, fullName);
}
}
}
