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https://issues.apache.org/jira/browse/CAMEL-24976?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on CAMEL-24976 started by Claus Ibsen.
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> camel-core - Type converter: fix bugs found in a deep review
> ------------------------------------------------------------
>
> Key: CAMEL-24976
> URL: https://issues.apache.org/jira/browse/CAMEL-24976
> Project: Camel
> Issue Type: Bug
> Components: camel-core
> Reporter: Claus Ibsen
> Assignee: Claus Ibsen
> Priority: Major
>
> A deep review of the core type converter (CoreTypeConverterRegistry,
> TypeResolverHelper and the core converters in camel-base) found several
> correctness bugs. All of the items below were reproduced against
> 4.23.0-SNAPSHOT.
> *Registry (CoreTypeConverterRegistry / TypeResolverHelper)*
> # Converting to a primitive type returns the value unchanged when it is an
> Integer or Long, whatever primitive was asked for. convertTo(int.class, 5L)
> returns a Long and convertTo(double.class, 5) returns an Integer, so callers
> get a ClassCastException. User impact: a bean method with an int parameter
> fails with "argument type mismatch" when the body is a Long.
> # tryConvertTo(boolean.class, "abc") throws TypeConversionException instead
> of returning null.
> # The miss cache is keyed by class pair, but fallback converters decide per
> value:
> #* one value a fallback cannot convert makes every later value of the same
> class pair return null, even values the fallback can convert.
> #* a converter or fallback added after a miss is never consulted for that
> pair.
> #* the miss marker is found by the super-type scans (tryMatch /
> tryAssignableFrom), so a miss on Base -> X also blocks Sub -> X.
> #* lookup(to, from), lookup(to) and getTypeConverter(to, from) return the
> internal miss marker, so callers checking lookup(...) != null believe a
> converter exists.
> # When several super-type converters match, the one chosen depends on
> ConcurrentHashMap iteration order, which changes between JVM runs (see
> CAMEL-21513).
> # The last-resort Object -> type lookup uses the primitive type rather than
> its wrapper.
> *Converters*
> # ObjectConverter.toNumber("-3000000000") throws NumberFormatException,
> toNumber("2147483647") returns a Long, and exponent notation such as "1e5"
> fails.
> # ObjectConverter.toBigInteger(BigDecimal("123456789012345678901234"))
> returns a wrong value with the wrong sign (it goes through longValue()).
> # String -> TimeUnit does not support MICROSECONDS.
> # String -> ByteBuffer ignores the charset from the exchange
> (CamelCharsetName header) and uses the JVM default.
> # ArrayTypeConverter returns a List when a Set is requested, which causes a
> ClassCastException.
> # Enum conversion is case-insensitive first-hit, so an exact match is not
> preferred (enum E { a, A }: "A" becomes a).
> # byte[] -> char sign-extends, so 0xE9 becomes a wrong character.
> # A converter obtained via lookup() leaks the internal Void.class "null
> value" marker instead of returning null (BulkTypeConverters default
> convertTo).
> # FutureTypeConverter does not restore the thread's interrupt flag when
> interrupted.
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