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47 lines
1.7 KiB
47 lines
1.7 KiB
(*
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* Copyright (c) 2013-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*)
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open! IStd
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(** Check an implicit cast when returning an immutable collection from a method whose type is mutable. *)
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let check_immutable_cast tenv curr_pname curr_pdesc typ_expected typ_found_opt loc : unit =
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match typ_found_opt with
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| Some typ_found -> (
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let casts =
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[ ("java.util.List", "com.google.common.collect.ImmutableList")
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; ("java.util.Map", "com.google.common.collect.ImmutableMap")
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; ("java.util.Set", "com.google.common.collect.ImmutableSet") ]
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in
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let in_casts expected given =
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List.exists
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~f:(fun (x, y) ->
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String.equal (Typ.Name.name expected) x && String.equal (Typ.Name.name given) y )
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casts
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in
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match
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(PatternMatch.type_get_class_name typ_expected, PatternMatch.type_get_class_name typ_found)
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with
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| Some name_expected, Some name_given ->
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if in_casts name_expected name_given then
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let description =
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Format.asprintf
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"Method %s returns %a but the return type is %a. Make sure that users of this \
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method do not try to modify the collection."
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(Typ.Procname.to_simplified_string curr_pname)
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Typ.Name.pp name_given Typ.Name.pp name_expected
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in
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EradicateCheckers.report_error tenv curr_pname curr_pdesc
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IssueType.checkers_immutable_cast loc description
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| _ ->
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() )
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| None ->
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()
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let callback_check_immutable_cast ({Callbacks.tenv} as args) =
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Eradicate.callback_check_return_type (check_immutable_cast tenv) args
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