private static MethodBuilder BuildGetHashCodeMethod(
IReadOnlyList <PropertyDescriptor> properties)
{
const string obj = nameof(obj);
return(MethodBuilder
.New()
.SetName(nameof(GetHashCode))
.SetPublic()
.SetOverride()
.SetReturnType(TypeNames.Int32)
.AddCode(HashCodeBuilder
.New()
.AddProperties(properties)));
}
// Used only in tests
public override int GetHashCode()
{
return(HashCodeBuilder.New().With(Count).With(FlagValue).With(Default).Value);
}
public static ClassBuilder AddEquality(
this ClassBuilder builder,
string typeName,
IReadOnlyList <PropertyDescriptor> properties)
{
const string obj = nameof(obj);
const string other = nameof(other);
builder.AddImplements(TypeNames.IEquatable.WithGeneric(typeName));
builder
.AddMethod(nameof(IEquatable <object> .Equals))
.SetPublic()
.SetOverride()
.SetReturnType(TypeNames.Boolean)
.AddParameter(obj, x => x.SetType(TypeNames.Object.MakeNullable()))
.AddCode(CodeBlockBuilder
.New()
.AddCode(IfBuilder
.New()
.SetCondition(MethodCallBuilder
.Inline()
.SetMethodName(nameof(ReferenceEquals))
.AddArgument("null")
.AddArgument(obj))
.AddCode("return false;"))
.AddEmptyLine()
.AddCode(IfBuilder
.New()
.SetCondition(MethodCallBuilder
.Inline()
.SetMethodName(nameof(ReferenceEquals))
.AddArgument("this")
.AddArgument(obj))
.AddCode("return true;"))
.AddEmptyLine()
.AddCode(IfBuilder
.New()
.SetCondition($"{obj}.GetType() != GetType()")
.AddCode("return false;"))
.AddEmptyLine()
.AddLine($"return Equals(({typeName}){obj});"));
ConditionBuilder equalCondition =
ConditionBuilder
.New()
.SetReturn()
.SetDetermineStatement();
if (properties.Count == 0)
{
equalCondition.And("true");
}
else
{
foreach (PropertyDescriptor property in properties)
{
equalCondition.And(ConditionBuilder
.New()
.Set(BuildPropertyComparison(property.Type, property.Name)));
}
}
builder
.AddMethod(nameof(IEquatable <object> .Equals))
.SetPublic()
.SetReturnType(TypeNames.Boolean)
.AddParameter(other, x => x.SetType(typeName.MakeNullable()))
.AddCode(CodeBlockBuilder
.New()
.AddCode(IfBuilder
.New()
.SetCondition(MethodCallBuilder
.Inline()
.SetMethodName(nameof(ReferenceEquals))
.AddArgument("null")
.AddArgument(other))
.AddCode("return false;"))
.AddEmptyLine()
.AddCode(IfBuilder
.New()
.SetCondition(MethodCallBuilder
.Inline()
.SetMethodName(nameof(ReferenceEquals))
.AddArgument("this")
.AddArgument(other))
.AddCode("return true;"))
.AddEmptyLine()
.AddCode(IfBuilder
.New()
.SetCondition($"{other}.GetType() != GetType()")
.AddCode("return false;"))
.AddEmptyLine()
.AddCode(equalCondition));
builder
.AddMethod(nameof(GetHashCode))
.SetPublic()
.SetOverride()
.SetReturnType(TypeNames.Int32)
.AddCode(HashCodeBuilder
.New()
.AddProperties(properties));
return(builder);
}
// Required because we use this class as a dictionary key
public override int GetHashCode()
{
return(HashCodeBuilder.New().With(Key).With(Variation).With(Version).Value);
}
