Remove compiler support for JLS source/target < 1.8

Fixes eclipse-jdt#2536

org.eclipse.jdt.compiler.tool.tests/src/org/eclipse/jdt/compiler/tool/tests/CompilerInvocationTests.java

@@ -57,7 +57,7 @@ public CompilerInvocationTests(String name) {
 	super(name);
 }
 public static Test suite() {
-	return buildUniqueComplianceTestSuite(CompilerInvocationTests.class, ClassFileConstants.JDK1_6);
+	return buildUniqueComplianceTestSuite(CompilerInvocationTests.class, ClassFileConstants.JDK1_8);
 }
 public static Class<CompilerInvocationTests> testClass() {
 	return CompilerInvocationTests.class;
@@ -81,7 +81,7 @@ protected void checkClassFiles(String[] fileNames) {
 			fail("IO exception for file " + fileNames[i]);
 		}
 		assertNotNull("Could not read " + fileNames[i], reader);
-		assertEquals("Wrong Java version for " + fileNames[i], ClassFileConstants.JDK1_6, reader.getVersion());
+		assertEquals("Wrong Java version for " + fileNames[i], ClassFileConstants.JDK1_8, reader.getVersion());
 	}
 }
 void runTest(
@@ -96,7 +96,7 @@ void runTest(
 		String[] classFileNames) {
 	List<String> opt = options == null ? new ArrayList<>() : new ArrayList<>(options);
 	opt.add("-source");
-	opt.add("1.6");
+	opt.add("1.8");
 	super.runTest(
 		shouldCompileOK,
 		sourceFiles,

org.eclipse.jdt.core.compiler.batch/META-INF/MANIFEST.MF

@@ -3,7 +3,7 @@ Main-Class: org.eclipse.jdt.internal.compiler.batch.Main
 Bundle-ManifestVersion: 2
 Bundle-Name: Eclipse Compiler for Java(TM)
 Bundle-SymbolicName: org.eclipse.jdt.core.compiler.batch
-Bundle-Version: 3.38.100.qualifier
+Bundle-Version: 3.39.0.qualifier
 Bundle-ClassPath: .
 Bundle-Vendor: Eclipse.org
 Automatic-Module-Name: org.eclipse.jdt.core.compiler.batch

org.eclipse.jdt.core.compiler.batch/pom.xml

@@ -17,7 +17,7 @@
     <version>4.33.0-SNAPSHOT</version>
   </parent>
   <artifactId>org.eclipse.jdt.core.compiler.batch</artifactId>
-  <version>3.38.100-SNAPSHOT</version>
+  <version>3.39.0-SNAPSHOT</version>
   <packaging>eclipse-plugin</packaging>
 
   <properties>

org.eclipse.jdt.core.compiler.batch/src/org/eclipse/jdt/core/compiler/IProblem.java

@@ -2183,6 +2183,8 @@ public interface IProblem {
 	int FeatureNotSupported = Compliance + 1107;
 	/** @since 3.26*/
 	int PreviewAPIUsed = Compliance + 1108;
+	/** @since 3.39*/
+	int JavaVersionNotSupported = Compliance + 1109;
 
 	/** @since 3.13 */
 	int UnlikelyCollectionMethodArgumentType = 1200;

org.eclipse.jdt.core.compiler.batch/src/org/eclipse/jdt/internal/compiler/Compiler.java

@@ -818,11 +818,31 @@ private  void abortIfPreviewNotAllowed(ICompilationUnit[] sourceUnits, int maxUn
 			throw a;
 		}
 	}
+
+	private  void abortIfVersionNotAllowed(ICompilationUnit[] sourceUnits, int maxUnits) {
+		try {
+			long firstSupportedJdkLevel = CompilerOptions.getFirstSupportedJdkLevel();
+			if (this.options.sourceLevel < firstSupportedJdkLevel
+					|| this.options.targetJDK < firstSupportedJdkLevel
+					|| this.options.complianceLevel < firstSupportedJdkLevel) {
+				long badVersion = Math.min(this.options.complianceLevel, Math.min(this.options.sourceLevel, this.options.targetJDK));
+				this.problemReporter.abortDueToNotSupportedJavaVersion(CompilerOptions.versionFromJdkLevel(badVersion),
+						CompilerOptions.getFirstSupportedJavaVersion());
+			}
+		} catch (AbortCompilation a) {
+			// best effort to find a way for reporting this problem: report on the first source
+			if (a.compilationResult == null) {
+				a.compilationResult = new CompilationResult(sourceUnits[0], 0, maxUnits, this.options.maxProblemsPerUnit);
+			}
+			throw a;
+		}
+	}
 	/**
 	 * Add the initial set of compilation units into the loop
 	 *  ->  build compilation unit declarations, their bindings and record their results.
 	 */
 	protected void internalBeginToCompile(ICompilationUnit[] sourceUnits, int maxUnits) {
+		abortIfVersionNotAllowed(sourceUnits,maxUnits);
 		abortIfPreviewNotAllowed(sourceUnits,maxUnits);
 		if (!this.useSingleThread && maxUnits >= ReadManager.THRESHOLD)
 			this.parser.readManager = new ReadManager(sourceUnits, maxUnits);

org.eclipse.jdt.core.compiler.batch/src/org/eclipse/jdt/internal/compiler/batch/messages.properties

@@ -61,7 +61,7 @@ compile.severalClassFilesGenerated = [{0} .class files generated]
 compile.failOnWarning = error: warnings found and -failOnWarning specified
 
 ### configure
-configure.requiresJDK1.2orAbove = Need to use a JVM >= 1.2
+configure.requiresJDK1.2orAbove = Need to use a JVM >= 1.8
 configure.duplicateLog = duplicate log specification: {0}
 configure.duplicateRepeat = duplicate repeat specification: {0}
 configure.duplicateMaxProblems = duplicate max problems specification: {0}
@@ -71,7 +71,10 @@ configure.duplicateTarget = duplicate target compliance setting specification: {
 configure.unsupportedReleaseOption = option --release is supported only when run with JDK 9 or above
 configure.unsupportedWithRelease = option {0} is not supported when --release is used
 configure.unsupportedReleaseVersion = release version {0} is not supported
-configure.source = source level should be in ''1.1''...''1.8'',''9''...''22'' (or ''5.0''..''22.0''): {0}
+configure.unsupportedComplianceVersion = compliance option {0} is no longer supported. Use {1} or later.
+configure.unsupportedSourceVersion = source option {0} is no longer supported. Use {1} or later.
+configure.unsupportedTargetVersion = target option {0} is no longer supported. Use {1} or later.
+configure.source = source level should be in ''1.8'',''9''...''22'' (or ''5.0''..''22.0''): {0}
 configure.invalidSystem = invalid location for system libraries: {0}
 configure.unsupportedOption = option {0} not supported at compliance level 9 and above
 configure.duplicateOutputPath = duplicate output path specification: {0}
@@ -89,9 +92,9 @@ configure.invalidDebugOption = invalid debug option: {0}
 configure.invalidWarningConfiguration = invalid warning configuration: ''{0}''
 configure.invalidWarning = invalid warning token: ''{0}''. Ignoring warning and compiling
 configure.invalidWarningOption = invalid warning option: ''{0}''. Must specify a warning token
-configure.targetJDK = target level should be in ''1.1''...''1.8'',''9''...''22'' (or ''5.0''..''22.0'') or cldc1.1: {0}
+configure.targetJDK = target level should be in ''1.8'',''9''...''22'' (or ''8.0''..''22.0''): {0}
 configure.incompatibleTargetForSource = Target level ''{0}'' is incompatible with source level ''{1}''. A target level ''{1}'' or better is required
-configure.incompatibleTargetForGenericSource = Target level ''{0}'' is incompatible with source level ''{1}''. A source level ''1.5'' or better is required
+configure.incompatibleTargetForGenericSource = Target level ''{0}'' is incompatible with source level ''{1}''. A source level ''1.8'' or better is required
 configure.incompatibleComplianceForSource = Compliance level ''{0}'' is incompatible with source level ''{1}''. A compliance level ''{1}'' or better is required
 configure.incompatibleComplianceForTarget = Compliance level ''{0}'' is incompatible with target level ''{1}''. A compliance level ''{1}'' or better is required
 configure.repetition = repetition must be a positive integer: {0}
@@ -135,9 +138,7 @@ configure.invalidClassName = invalid class name: {0}
 configure.invalidModuleName = invalid module name: {0}
 configure.packageConflict = The package {0} is accessible from more than one module: {1}, {2}
 configure.unavailableAPT = Unable to load annotation processing manager {0} from classpath.
-configure.incorrectVMVersionforAPT = Annotation processing got disabled, since it requires a 1.6 compliant JVM
-configure.incompatibleSourceForCldcTarget=Target level ''{0}'' is incompatible with source level ''{1}''. A source level ''1.3'' or lower is required
-configure.incompatibleComplianceForCldcTarget=Target level ''{0}'' is incompatible with compliance level ''{1}''. A compliance level ''1.4''or lower is required
+configure.incorrectVMVersionforAPT = Annotation processing got disabled, since it requires a 1.8 compliant JVM
 configure.invalidClasspathSection = invalid Class-Path header in manifest of jar file: {0}
 configure.multipleClasspathSections = multiple Class-Path headers in manifest of jar file: {0}
 configure.missingwarningspropertiesfile=properties file {0} does not exist
@@ -243,11 +244,6 @@ misc.usage = {1} {2}\n\
 \    --release <release> compile for a specific VM version\n\
 \ \n\
 \ Compliance options:\n\
-\    -1.3               use 1.3 compliance (-source 1.3 -target 1.1)\n\
-\    -1.4             + use 1.4 compliance (-source 1.3 -target 1.2)\n\
-\    -1.5 -5 -5.0       use 1.5 compliance (-source 1.5 -target 1.5)\n\
-\    -1.6 -6 -6.0       use 1.6 compliance (-source 1.6 -target 1.6)\n\
-\    -1.7 -7 -7.0       use 1.7 compliance (-source 1.7 -target 1.7)\n\
 \    -1.8 -8 -8.0       use 1.8 compliance (-source 1.8 -target 1.8)\n\
 \    -1.9 -9 -9.0       use 1.9 compliance (-source 1.9 -target 1.9)\n\
 \    -10 -10.0          use 10  compliance (-source 10  -target 10)\n\
@@ -263,12 +259,10 @@ misc.usage = {1} {2}\n\
 \    -20 -20.0          use 20  compliance (-source 20  -target 20)\n\
 \    -21 -21.0          use 21  compliance (-source 21  -target 21)\n\
 \    -22 -22.0          use 22  compliance (-source 22  -target 22)\n\
-\    -source <version>  set source level: 1.3 to 1.9, 10 to 22\n\
-\                       (or 6, 6.0, etc)\n\
-\    -target <version>  set classfile target: 1.3 to 1.9, 10 to 22\n\
-\                       (or 6, 6.0, etc)\n\
-\                       cldc1.1 can also be used to generate the StackMap\n\
-\                       attribute\n\
+\    -source <version>  set source level: 1.8, 9 to 22\n\
+\                       (or 8.0, 9.0, etc)\n\
+\    -target <version>  set classfile target: 1.8, 9 to 22\n\
+\                       (or 8.0, 9.0, etc)\n\
 \    --enable-preview   enable support for preview features of the\n\
 \                       latest Java release\n\
 \ \n\
@@ -311,7 +305,7 @@ misc.usage = {1} {2}\n\
 \    -preserveAllLocals preserve unused local vars for debug purpose\n\
 \ \n\
 \ Annotation processing options:\n\
-\   These options are meaningful only in a 1.6 environment.\n\
+\   These options are meaningful only in a 1.8 environment.\n\
 \    -Akey[=value]        options that are passed to annotation processors\n\
 \    -processorpath <directories and ZIP archives separated by {0}>\n\
 \                         specify locations where to find annotation processors.\n\
@@ -348,7 +342,7 @@ misc.usage = {1} {2}\n\
 \    -noExit            do not call System.exit(n) at end of compilation (n==0\n\
 \                       if no error)\n\
 \    -repeat <n>        repeat compilation process <n> times for perf analysis\n\
-\    -inlineJSR         inline JSR bytecode (implicit if target >= 1.5)\n\
+\    -inlineJSR         inline JSR bytecode (implicit if target >= 1.8)\n\
 \    -enableJavadoc     consider references in javadoc\n\
 \    -parameters        generate method parameters attribute (for target >= 1.8)\n\
 \    -genericsignature  generate generic signature for lambda expressions\n\

org.eclipse.jdt.core.compiler.batch/src/org/eclipse/jdt/internal/compiler/impl/CompilerOptions.java

@@ -35,6 +35,7 @@
 import java.io.UnsupportedEncodingException;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Set;
 
 import org.eclipse.jdt.core.compiler.CharOperation;
 import org.eclipse.jdt.internal.compiler.Compiler;
@@ -258,6 +259,25 @@ public class CompilerOptions {
 	 * Note: Whenever a new version is added, make sure getLatestVersion()
 	 * is updated with it.
 	 */
+
+	/**
+	 * Unsupported JLS versions
+	 */
+	/*
+	 * Note: Whenever a new version is obsoleted, make sure getFirstVersion() is updated.
+	 */
+	public static Set<String> UNSUPPORTED_VERSIONS = Set.of(
+			VERSION_1_1,
+			VERSION_1_2,
+			VERSION_1_3,
+			VERSION_1_4,
+			VERSION_JSR14,
+			VERSION_CLDC1_1,
+			VERSION_1_5,
+			VERSION_1_6,
+			VERSION_1_7
+			);
+
 	public static final String ERROR = "error"; //$NON-NLS-1$
 	public static final String WARNING = "warning"; //$NON-NLS-1$
 	public static final String INFO = "info"; //$NON-NLS-1$
@@ -647,6 +667,18 @@ public CompilerOptions(Map<String, String> settings, boolean parseLiteralExpress
 		this.parseLiteralExpressionsAsConstants = parseLiteralExpressionsAsConstants;
 	}
 
+	/**
+	 * Return the first (oldest) Java language version supported by the Eclipse compiler
+	 */
+	public static String getFirstSupportedJavaVersion() {
+		return VERSION_1_8;
+	}
+	/**
+	 * Return the first (oldest) Java language level supported by the Eclipse compiler
+	 */
+	public static long getFirstSupportedJdkLevel() {
+		return ClassFileConstants.JDK1_8;
+	}
 	/**
 	 * Return the latest Java language version supported by the Eclipse compiler
 	 */
@@ -1545,9 +1577,9 @@ protected void resetDefaults() {
 
 		// by default only lines and source attributes are generated.
 		this.produceDebugAttributes = ClassFileConstants.ATTR_SOURCE | ClassFileConstants.ATTR_LINES;
-		this.complianceLevel = this.originalComplianceLevel = ClassFileConstants.JDK1_4; // by default be compliant with 1.4
-		this.sourceLevel = this.originalSourceLevel = ClassFileConstants.JDK1_3; //1.3 source behavior by default
-		this.targetJDK = ClassFileConstants.JDK1_2; // default generates for JVM1.2
+		this.complianceLevel = this.originalComplianceLevel = ClassFileConstants.JDK1_8; // by default be compliant with 1.8
+		this.sourceLevel = this.originalSourceLevel = ClassFileConstants.JDK1_8; //1.8 source behavior by default
+		this.targetJDK = ClassFileConstants.JDK1_8; // default generates for JVM1.8
 
 		this.defaultEncoding = null; // will use the platform default encoding
 

org.eclipse.jdt.core.compiler.batch/src/org/eclipse/jdt/internal/compiler/problem/ProblemReporter.java

@@ -913,6 +913,16 @@ public void abortDueToPreviewEnablingNotAllowed(String sourceLevel, String expec
 			0,
 			0);
 }
+public void abortDueToNotSupportedJavaVersion(String notSupportedVersion, String firstSupportedVersion) {
+	String[] args = new String[] {notSupportedVersion, firstSupportedVersion};
+	this.handle(
+			IProblem.JavaVersionNotSupported,
+			args,
+			args,
+			ProblemSeverities.Error | ProblemSeverities.Abort | ProblemSeverities.Fatal,
+			0,
+			0);
+}
 public void abstractMethodCannotBeOverridden(SourceTypeBinding type, MethodBinding concreteMethod) {
 
 	this.handle(

org.eclipse.jdt.core.compiler.batch/src/org/eclipse/jdt/internal/compiler/problem/messages.properties

@@ -287,9 +287,9 @@
 264 = Invalid high surrogate: must be within 0xD800 and 0xDBFF
 265 = Unnecessary $NON-NLS$ tag
 266 = Invalid binary literal number (only '0' and '1' are expected)
-267 = Binary literals can only be used with source level 1.7 or greater
+267 = Binary literals can only be used with source level 1.8 or greater
 268 = Underscores have to be located within digits
-269 = Underscores can only be used with source level 1.7 or greater
+269 = Underscores can only be used with source level 1.8 or greater
 271 = This lambda expression refers to the missing type {0}
 272 = Text block is not properly closed with the delimiter
 
@@ -441,8 +441,8 @@
 433 = Too many methods for type {0}. Maximum is 65535
 434 = The synthetic method created to access {0}({1}) of type {2} has too many parameters
 
-440 = 'assert' should not be used as an identifier, since it is a reserved keyword from source level 1.4 on
-441 = 'enum' should not be used as an identifier, since it is a reserved keyword from source level 1.5 on
+440 = 'assert' should not be used as an identifier, since it is a reserved keyword from source level 1.8 on
+441 = 'enum' should not be used as an identifier, since it is a reserved keyword from source level 1.8 on
 442 = Enum constants cannot be surrounded by parenthesis
 443 = '_' should not be used as an identifier, since it is a reserved keyword from source level 1.8 on
 444 = The uninterned types {0} and {1} should not be compared using ==/!= operators.
@@ -594,14 +594,14 @@
 585 = Type safety: Elements of type {0} need unchecked conversion to conform to {1}
 
 ### SOURCE LEVEL
-590 = Syntax error, type parameters are only available if source level is 1.5 or greater
-591 = Syntax error, static imports are only available if source level is 1.5 or greater
-592 = Syntax error, 'for each' statements are only available if source level is 1.5 or greater
-593 = Syntax error, parameterized types are only available if source level is 1.5 or greater
-594 = Syntax error, enum declarations are only available if source level is 1.5 or greater
-595 = Syntax error, varargs are only available if source level is 1.5 or greater
-596 = Syntax error, annotations are only available if source level is 1.5 or greater
-597 = Syntax error, annotation declarations are only available if source level is 1.5 or greater
+590 = Syntax error, type parameters are only available if source level is 1.8 or greater
+591 = Syntax error, static imports are only available if source level is 1.8 or greater
+592 = Syntax error, 'for each' statements are only available if source level is 1.8 or greater
+593 = Syntax error, parameterized types are only available if source level is 1.8 or greater
+594 = Syntax error, enum declarations are only available if source level is 1.8 or greater
+595 = Syntax error, varargs are only available if source level is 1.8 or greater
+596 = Syntax error, annotations are only available if source level is 1.8 or greater
+597 = Syntax error, annotation declarations are only available if source level is 1.8 or greater
 598 = Syntax error, annotation declaration cannot have type parameters
 599 = Syntax error, enum declaration cannot have type parameters
 
@@ -905,6 +905,7 @@
 1106 = Preview features enabled at an invalid source release level {0}, preview can be enabled only at source level {1}
 1107 = The Java feature ''{0}'' is only available with source level {1} and above
 1108 = You are using an API that is part of a preview feature and may be removed in future
+1109 = The Java version ''{0}'' is no longer supported. Use {1} or later.
 # more programming problems:
 1200 = Unlikely argument type {0} for {1} on a {2}
 1201 = Unlikely argument type for equals(): {0} seems to be unrelated to {2}

org.eclipse.jdt.core.tests.builder/pom.xml

@@ -60,7 +60,7 @@
 			</plugins>
 		</build>
 		<properties>
-			<tycho.surefire.argLine>--add-modules ALL-SYSTEM -Dcompliance=1.4,1.7,1.8,17</tycho.surefire.argLine>
+			<tycho.surefire.argLine>--add-modules ALL-SYSTEM -Dcompliance=1.8,17</tycho.surefire.argLine>
 		</properties>
 	</profile>
 	<profile>
@@ -81,7 +81,7 @@
 			</plugins>
 		</build>
 		<properties>
-			<tycho.surefire.argLine>--add-modules ALL-SYSTEM -Dcompliance=1.4,1.7,1.8,21</tycho.surefire.argLine>
+			<tycho.surefire.argLine>--add-modules ALL-SYSTEM -Dcompliance=1.8,21</tycho.surefire.argLine>
 		</properties>
 	</profile>
 	<profile>
@@ -102,7 +102,7 @@
 			</plugins>
 		</build>
 		<properties>
-			<tycho.surefire.argLine>--add-modules ALL-SYSTEM -Dcompliance=1.4,1.7,1.8,21,22</tycho.surefire.argLine>
+			<tycho.surefire.argLine>--add-modules ALL-SYSTEM -Dcompliance=1.8,21,22</tycho.surefire.argLine>
 		</properties>
 	</profile>
   </profiles>

org.eclipse.jdt.core.tests.builder/src/org/eclipse/jdt/core/tests/builder/BuilderTests.java

@@ -548,13 +548,11 @@ private static Class[] getAllTestClasses() {
 			LeakTestsBefore9.class,
 		};
 		List<Class<?>> list = new ArrayList<>(Arrays.asList(classes));
-		if (matchesCompliance(F_1_5)) {
+		if (matchesCompliance(F_1_8)) {
 			list.add(Java50Tests.class);
 			list.add(PackageInfoTest.class);
 			list.add(ParticipantBuildTests.class);
 			list.add(AnnotationDependencyTests.class);
-		}
-		if (matchesCompliance(F_1_8)) {
 			list.add(Bug544921Test.class);
 		}
 		if (matchesCompliance(F_9)) {