Optimize datastructure

CONTRIBUTING.md

@@ -1,7 +1,7 @@
 # Contributing to the Checker Framework
 
 Thank you for contributing to the Checker Framework!  This project is a
-community effort of [more than 90
+community effort of [more than 110
 developers](https://checkerframework.org/manual/#credits), plus countless
 more people who have contributed bug reports and feature suggestions.  We
 couldn't do it without your help.
@@ -19,18 +19,30 @@ bug, and we want to fix it.  Please report it.
 
 ## Submitting changes
 
-Please see the [pull requests](https://rawgit.com/typetools/checker-framework/master/docs/developer/developer-manual.html#pull-requests) section of the Developer Manual.
+Please see the [pull
+requests](https://rawgit.com/typetools/checker-framework/master/docs/developer/developer-manual.html#pull-requests)
+section of the Developer Manual.
+
+Submit changes to the annotated JDK at https://github.com/typetools/jdk/pulls .
+Annotations for other libraries can be contributed as stub files in this
+repository, in a fork of the library in https://github.com/typetools/, or
+in the library's own repository.
 
 Do you want to contribute to the project, but you are not sure what issue
 to fix or what feature to add?  Use the tool in your daily work, and when
-you encounter a limitation that bothers you, fix that one.
+you encounter a limitation that bothers you, fix that one.  The ["help
+wanted"](https://github.com/typetools/checker-framework/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22)
+label marks issues that require less deep knowledge and may be appropriate
+for a newcomer to the codebase.
 
 
 ## License
 
-By contributing, you agree that your contributions will be licensed under the existing [license](LICENSE.txt), usually GPL2 or MIT License.
+By contributing, you agree that your contributions will be licensed under the
+existing [license](LICENSE.txt), usually GPL2 or MIT License.
 
 
 ## Code of conduct
 
-In interactions with other people, please abide by the [Contributor Covenant](https://www.contributor-covenant.org/version/2/0/code_of_conduct).
+When interacting with other people, please abide by the [Contributor
+Covenant](https://www.contributor-covenant.org/version/2/0/code_of_conduct).

LICENSE.txt

@@ -6,34 +6,39 @@ Most of the Checker Framework is licensed under the GNU General Public
 License, version 2 (GPL2), with the classpath exception.  The text of this
 license appears below.  This is the same license used for OpenJDK.
 
-A few parts of the Checker Framework have more permissive licenses.
-
- * The annotations are licensed under the MIT License.  (The text of this
-   license also appears below.)  More specifically, all the parts of the
-   Checker Framework that you might want to include with your own program
-   use the MIT License.  This is the checker-qual*.jar and
-   checker-compat-qual*.jar files and all the files that appear in them:
-   every file in a qual/ directory, plus utility files such as
-   NullnessUtil.java, RegexUtil.java, SignednessUtil.java, etc.  In
-   addition, the cleanroom implementations of third-party annotations,
-   which the Checker Framework recognizes as aliases for its own
-   annotations, are licensed under the MIT License.
-
-Some external libraries that are included with the Checker Framework have
-different licenses.
+A few parts of the Checker Framework have more permissive licenses, notably
+the parts that you might want to include with your own program.
+
+ * The annotations and utility files are licensed under the MIT License.
+   (The text of this license also appears below.)  This applies to the
+   checker-qual*.jar and all the files that appear in it:  every file in a
+   qual/ directory, plus utility files FormatUtil.java,
+   I18nFormatUtil.java, NullnessUtil.java, Opt.java, PurityUnqualified.java,
+   RegexUtil.java, SignednessUtil.java, SignednessUtilExtra.java, and
+   UnitsTools.java.  It also applies to the cleanroom implementations of
+   third-party annotations (in checker/src/testannotations/ and in
+   framework/src/main/java/org/jmlspecs/).
+
+The Checker Framework includes annotations for some libraries.  Those in
+.astub files use the MIT License.  Those in https://github.com/typetools/jdk
+(which appears in the annotated-jdk directory of file checker.jar) use the
+GPL2 license.
+
+Some external libraries that are included with the Checker Framework
+distribution have different licenses.  Here are some examples.
 
  * javaparser is dual licensed under the LGPL or the Apache license -- you
    may use it under whichever one you want.  (The javaparser source code
    contains a file with the text of the GPL, but it is not clear why, since
-   javaparser does not use the GPL.)  See file stubparser/LICENSE
-   and the source code of all its files.
+   javaparser does not use the GPL.)  See
+   https://github.com/typetools/stubparser .
+
+ * Annotation Tools (https://github.com/typetools/annotation-tools) uses
+   the MIT license.
 
  * Libraries in plume-lib (https://github.com/plume-lib/) are licensed
    under the MIT License.
 
-The Checker Framework includes annotations for some libraries.  Each annotated
-library uses the same license as the unannotated version of the library.
-
 ===========================================================================
 
 The GNU General Public License (GPL)

azure-pipelines.yml

@@ -10,25 +10,55 @@ pr:
 
 
 jobs:
-- job: all_tests_jdk8
+- job: junit_tests_jdk8
+  dependsOn:
+   - junit_tests_jdk11
+   - nonjunit_tests_jdk11
+   - misc_jdk11
   pool:
     vmImage: 'ubuntu-latest'
   container: mdernst/cf-ubuntu-jdk8:latest
   steps:
   - checkout: self
     fetchDepth: 25
-  - bash: ./checker/bin-devel/test-cftests-all.sh
-    displayName: test-cftests-all.sh
-- job: all_tests_jdk11
+  - bash: ./checker/bin-devel/test-cftests-junit.sh
+    displayName: test-cftests-junit.sh
+- job: junit_tests_jdk11
   pool:
     vmImage: 'ubuntu-latest'
   container: mdernst/cf-ubuntu-jdk11:latest
   steps:
   - checkout: self
     fetchDepth: 25
-  - bash: ./checker/bin-devel/test-cftests-all.sh
-    displayName: test-cftests-all.sh
+  - bash: ./checker/bin-devel/test-cftests-junit.sh
+    displayName: test-cftests-junit.sh
+- job: nonjunit_tests_jdk8
+  dependsOn:
+   - junit_tests_jdk11
+   - nonjunit_tests_jdk11
+   - misc_jdk11
+  pool:
+    vmImage: 'ubuntu-latest'
+  container: mdernst/cf-ubuntu-jdk8:latest
+  steps:
+  - checkout: self
+    fetchDepth: 25
+  - bash: ./checker/bin-devel/test-cftests-nonjunit.sh
+    displayName: test-cftests-nonjunit.sh
+- job: nonjunit_tests_jdk11
+  pool:
+    vmImage: 'ubuntu-latest'
+  container: mdernst/cf-ubuntu-jdk11:latest
+  steps:
+  - checkout: self
+    fetchDepth: 25
+  - bash: ./checker/bin-devel/test-cftests-nonjunit.sh
+    displayName: test-cftests-nonjunit.sh
 - job: misc_jdk8
+  dependsOn:
+   - junit_tests_jdk11
+   - nonjunit_tests_jdk11
+   - misc_jdk11
   pool:
     vmImage: 'ubuntu-latest'
   container: mdernst/cf-ubuntu-jdk8-plus:latest
@@ -47,6 +77,11 @@ jobs:
   - bash: ./checker/bin-devel/test-misc.sh
     displayName: test-misc.sh
 - job: cf_inference_jdk8
+  dependsOn:
+   - junit_tests_jdk11
+   - nonjunit_tests_jdk11
+   - misc_jdk11
+   - cf_inference_jdk11
   pool:
     vmImage: 'ubuntu-latest'
   container: mdernst/cf-ubuntu-jdk8:latest
@@ -65,6 +100,11 @@ jobs:
   - bash: ./checker/bin-devel/test-cf-inference.sh
     displayName: test-cf-inference.sh
 - job: daikon_jdk8
+  dependsOn:
+   - junit_tests_jdk11
+   - nonjunit_tests_jdk11
+   - misc_jdk11
+   - daikon_jdk11
   pool:
     vmImage: 'ubuntu-latest'
   container: mdernst/cf-ubuntu-jdk8:latest
@@ -83,6 +123,11 @@ jobs:
   - bash: ./checker/bin-devel/test-daikon.sh
     displayName: test-daikon.sh
 - job: guava_jdk8
+  dependsOn:
+   - junit_tests_jdk11
+   - nonjunit_tests_jdk11
+   - misc_jdk11
+   - guava_jdk11
   pool:
     vmImage: 'ubuntu-latest'
   container: mdernst/cf-ubuntu-jdk8:latest
@@ -103,6 +148,11 @@ jobs:
   - bash: ./checker/bin-devel/test-guava.sh
     displayName: test-guava.sh
 - job: plume_lib_jdk8
+  dependsOn:
+   - junit_tests_jdk11
+   - nonjunit_tests_jdk11
+   - misc_jdk11
+   - plume_lib_jdk11
   pool:
     vmImage: 'ubuntu-latest'
   container: mdernst/cf-ubuntu-jdk8:latest
@@ -120,19 +170,24 @@ jobs:
     fetchDepth: 25
   - bash: ./checker/bin-devel/test-plume-lib.sh
     displayName: test-plume-lib.sh
-- job: downstream_jdk11
+- job: downstream_jdk8
+  dependsOn:
+   - junit_tests_jdk11
+   - nonjunit_tests_jdk11
+   - misc_jdk11
+   - downstream_jdk11
   pool:
     vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk11:latest
+  container: mdernst/cf-ubuntu-jdk8:latest
   steps:
   - checkout: self
     fetchDepth: 25
   - bash: ./checker/bin-devel/test-downstream.sh
     displayName: test-downstream.sh
-- job: downstream_jdk8
+- job: downstream_jdk11
   pool:
     vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk8:latest
+  container: mdernst/cf-ubuntu-jdk11:latest
   steps:
   - checkout: self
     fetchDepth: 25