Support jdk 21 (#311)

Author: gnodet

.github/workflows/maven.yml

@@ -26,15 +26,9 @@ jobs:
     name: Build it
     uses: codehaus-plexus/.github/.github/workflows/maven.yml@master
     with:
-      jdk-fast-fail-build: '11'
-      jdk-matrix: '["11", "17", "20"]'
-      jdk-distribution-matrix: '["zulu", "temurin", "microsoft", "liberica","corretto"]'
+      jdk-fast-fail-build: '21'
+      jdk-matrix: '["11", "17", "21"]'
+      jdk-distribution-matrix: '["zulu", "temurin", "microsoft", "liberica", "corretto"]'
       os-matrix: '["ubuntu-latest","windows-latest", "macOS-latest"]'
-      matrix-exclude: '[
-          { "jdk": "21-ea", "distribution": "corretto"  },
-          { "jdk": "21-ea", "distribution": "liberica"  },
-          { "jdk": "20", "distribution": "microsoft" },
-          { "jdk": "21-ea", "distribution": "temurin"   }
-         ]'
       maven_args: 'install javadoc:javadoc -e -B -V -fae -Pno-tests-if-not-on-osx'
 

plexus-compilers/plexus-compiler-javac-errorprone/src/test/java/org/codehaus/plexus/compiler/javac/JavacErrorProneCompilerTest.java

@@ -21,12 +21,12 @@ protected int expectedWarnings()
         String javaVersion = getJavaVersion();
         if (javaVersion.startsWith("1.8")) {
             return 1;
-        } else {
-            if (javaVersion.contains("18") || javaVersion.contains("19") || javaVersion.contains("20")) {
-                return 5;
-            }
-            return 2;
+        } else if (javaVersion.contains("18") || javaVersion.contains("19") || javaVersion.contains("20")) {
+            return 5;
+        } else if (javaVersion.contains("21")) {
+            return 6;
         }
+        return 2;
     }
 
     @Override

plexus-compilers/plexus-compiler-javac/src/test/java/org/codehaus/plexus/compiler/javac/AbstractJavacCompilerTest.java

@@ -69,7 +69,8 @@ protected int expectedErrors()
         String javaVersion = getJavaVersion();
         if (javaVersion.contains("9.0")||javaVersion.contains("11")||javaVersion.contains("14")||
             javaVersion.contains("15")||javaVersion.contains("16")||javaVersion.contains("17")||
-            javaVersion.contains("18")||javaVersion.contains("19")||javaVersion.contains("20")){
+            javaVersion.contains("18")||javaVersion.contains("19")||javaVersion.contains("20")||
+            javaVersion.contains("21")){
             return 5;
         }
         // javac output changed for misspelled modifiers starting in 1.6...they now generate 2 errors per occurrence, not one.
@@ -89,7 +90,8 @@ protected int expectedWarnings()
         String javaVersion = getJavaVersion();
         if (javaVersion.contains("9.0")||javaVersion.contains("11")||javaVersion.contains("14")||
             javaVersion.contains("15")||javaVersion.contains("16")||javaVersion.contains("17")||
-            javaVersion.contains("18")||javaVersion.contains("19")||javaVersion.contains("20")){
+            javaVersion.contains("18")||javaVersion.contains("19")||javaVersion.contains("20")||
+            javaVersion.contains("21")){
             return 1;
         }
         if (javaVersion.contains("1.8")){
@@ -137,6 +139,9 @@ public String getTargetVersion()
         if (javaVersion.contains("20")){
             return "20";
         }
+        if (javaVersion.contains("21")){
+            return "21";
+        }
         return super.getTargetVersion();
     }
 
@@ -175,6 +180,9 @@ public String getSourceVersion()
         if (javaVersion.contains("20")){
             return "20";
         }
+        if (javaVersion.contains("21")){
+            return "21";
+        }
         return super.getTargetVersion();
     }
 
@@ -184,7 +192,8 @@ protected Collection<String> expectedOutputFiles()
         String javaVersion = getJavaVersion();
         if (javaVersion.contains("9.0")||javaVersion.contains("11")||javaVersion.contains("14")||
             javaVersion.contains("15")||javaVersion.contains("16")||javaVersion.contains("17")||
-            javaVersion.contains("18")||javaVersion.contains("19")||javaVersion.contains("20")
+            javaVersion.contains("18")||javaVersion.contains("19")||javaVersion.contains("20")||
+            javaVersion.contains("21")
         ){
             return Arrays.asList( "org/codehaus/foo/Deprecation.class", "org/codehaus/foo/ExternalDeps.class",
                     "org/codehaus/foo/Person.class" );

plexus-compilers/plexus-compiler-javac/src/test/java/org/codehaus/plexus/compiler/javac/JavaxToolsCompilerTest.java

@@ -25,4 +25,15 @@ public class JavaxToolsCompilerTest
     extends AbstractJavacCompilerTest
 {
     // no op default is to javax.tools if available
+
+    @Override
+    protected int expectedWarnings() {
+        String javaVersion = getJavaVersion();
+        if (javaVersion.contains("21")) {
+            return 8;
+        } else {
+            return super.expectedWarnings();
+        }
+    }
+
 }