public HasherResolver(EqualityContext context, MembersProvider membersProvider, IConfigurationProvider configuration)
{
_configuration = configuration;
_hashersFactories = new Func <IVariable, IHasherEmitter>[] {
variable => NullableHasher.Create(this, variable),
variable => StringHasher.Create(_configuration, variable),
BasicHasher.Create,
variable => MembersHasher.Create(this, membersProvider, _configuration, variable),
variable => ArrayHasher.Create(this, _configuration, variable),
variable => EnumerablesHasher.Create(this, _configuration, variable),
variable => IndirectHasher.Create(context, variable)
};
}
public IHasherEmitter GetHasherEmitter(IVariable variable)
{
var hasCustomComparer = _configuration.HasCustomEqualityComparer(variable.VariableType);
if (hasCustomComparer)
{
return(IndirectHasher.Create(variable));
}
var hasher = _hashersFactories
.Select(factory => factory(variable))
.FirstOrDefault(x => x != null);
if (hasher == null)
{
throw new NotSupportedException($"{variable.VariableType.DisplayName()} is not supported.");
}
return(hasher);
}