> The Type and AnnotatedType hierarchies have been enigmatic to new users: > users have no clue how to categorize arbitrary type objects, when it is safe > to cast to more specific types, and the exact conditions for method contracts. > > A manifest is [JDK-8306039](https://bugs.openjdk.org/browse/JDK-8306039), > where people are massively confused by the conditions for > `ParameterizedType::getOwnerType` to return `null`. > > To fix these problems, I consulted the JLS, used some terms from there and > added JLS links to make the definitions concise and accurate. > > Here are some actions: > 1. Add section for hierarchy overview for both Type and AnnotatedType > 2. Specify the underlying type for different AnnotatedType subinterfaces > 3. Define "inner member class" for `getOwnerType`, and refer to it in > `AnnotatedType::getAnnotatedOwnerType`. > 4. Improve the specification for `ParameterizedType::getActualTypeArguments` > to note the existence of owner types; also for annotated version > 5. Minor improvements to `ParameterizedType::getRawType` > 6. Move the equals specification for `ParameterizedType` to the actual > `equals` method. > > API diffs: > https://cr.openjdk.org/~liach/8343251-apidiff/java.base/java/lang/reflect/package-summary.html > > Please review the associated CSR as well.
Chen Liang has updated the pull request incrementally with one additional commit since the last revision: Intro and other various improvements ------------- Changes: - all: https://git.openjdk.org/jdk/pull/19977/files - new: https://git.openjdk.org/jdk/pull/19977/files/090eee17..83feba99 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=19977&range=03 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19977&range=02-03 Stats: 150 lines in 7 files changed: 54 ins; 12 del; 84 mod Patch: https://git.openjdk.org/jdk/pull/19977.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/19977/head:pull/19977 PR: https://git.openjdk.org/jdk/pull/19977
