Revert "Upgrade to Eclipse 2021-09"

This reverts commit f57832d.

See gh-277

pom.xml

@@ -31,12 +31,12 @@
 		<main.basedir>${basedir}</main.basedir>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<java.version>1.8</java.version>
-		<eclipse.repository>https://download.eclipse.org/releases/2021-09/202109151000/</eclipse.repository>
+		<eclipse.repository>https://download.eclipse.org/releases/2021-03/202103171000/</eclipse.repository>
 		<eclipse.checkstyle.repository>https://checkstyle.org/eclipse-cs-update-site/</eclipse.checkstyle.repository>
 		<tycho.disableP2Mirrors>true</tycho.disableP2Mirrors>
 		<ant.version>1.8.1</ant.version>
 		<ant-contrib.version>1.0b3</ant-contrib.version>
-		<asm.version>7.3.1</asm.version>
+		<asm.version>5.2</asm.version>
 		<assertj.version>3.8.0</assertj.version>
 		<checkstyle.version>8.45.1</checkstyle.version>
 		<gradle.version>3.4</gradle.version>

spring-javaformat/spring-javaformat-formatter-eclipse-rewriter/src/main/java/io/spring/javaformat/formatter/eclipse/rewrite/EclipseRewriter.java

@@ -42,7 +42,6 @@
  * Internal build utility used to rewrite eclipse runtime classes.
  *
  * @author Phillip Webb
- * @author Andy Wilkinson
  */
 public final class EclipseRewriter {
 
@@ -76,7 +75,7 @@ public void rewrite(String file) throws IOException {
 	private void rewrite(FileSystem zip) throws IOException {
 		rewrite(zip, "org/eclipse/jdt/internal/formatter/DefaultCodeFormatter.class",
 				DefaultCodeFormatterManipulator::new);
-		rewrite(zip, "org/eclipse/osgi/util/NLS.class", NlsManipulator::new);
+		rewrite(zip, "org/eclipse/osgi/util/NLS$1.class", NlsManipulator::new);
 	}
 
 	private void rewrite(FileSystem zip, String name, Function<ClassWriter, ClassVisitor> manipulator)
@@ -101,7 +100,7 @@ public static void main(String[] args) throws Exception {
 	private static class DefaultCodeFormatterManipulator extends ClassVisitor {
 
 		DefaultCodeFormatterManipulator(ClassVisitor visitor) {
-			super(Opcodes.ASM7, visitor);
+			super(Opcodes.ASM5, visitor);
 		}
 
 		@Override
@@ -130,7 +129,7 @@ public MethodVisitor visitMethod(int access, String name, String desc, String si
 	private static class DefaultCodeFormatterMethodManipulator extends MethodVisitor {
 
 		DefaultCodeFormatterMethodManipulator(MethodVisitor mv) {
-			super(Opcodes.ASM7, mv);
+			super(Opcodes.ASM5, mv);
 		}
 
 		@Override
@@ -150,12 +149,12 @@ public void visitMethodInsn(int opcode, String owner, String name, String desc,
 	private static class NlsManipulator extends ClassVisitor {
 
 		NlsManipulator(ClassVisitor visitor) {
-			super(Opcodes.ASM7, visitor);
+			super(Opcodes.ASM5, visitor);
 		}
 
 		@Override
 		public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
-			if ("<clinit>".equals(name)) {
+			if ("run".equals(name) && desc.contains("Boolean")) {
 				return new NslMethodManipulator(super.visitMethod(access, name, desc, signature, exceptions));
 			}
 			return super.visitMethod(access, name, desc, signature, exceptions);
@@ -172,26 +171,17 @@ private static class NslMethodManipulator extends MethodVisitor {
 		private final MethodVisitor methodVisitor;
 
 		NslMethodManipulator(MethodVisitor mv) {
-			super(Opcodes.ASM7, null);
+			super(Opcodes.ASM5, null);
 			this.methodVisitor = mv;
 		}
 
 		@Override
 		public void visitEnd() {
 			MethodVisitor mv = this.methodVisitor;
 			mv.visitCode();
-			mv.visitInsn(Opcodes.ICONST_0);
-			mv.visitTypeInsn(Opcodes.ANEWARRAY, "java/lang/Object");
-			mv.visitFieldInsn(Opcodes.PUTSTATIC, "org/eclipse/osgi/util/NLS", "EMPTY_ARGS", "[Ljava/lang/Object;");
 			mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Boolean", "TRUE", "Ljava/lang/Boolean;");
-			mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Boolean", "booleanValue", "()Z", false);
-			mv.visitFieldInsn(Opcodes.PUTSTATIC, "org/eclipse/osgi/util/NLS", "ignoreWarnings", "Z");
-			mv.visitTypeInsn(Opcodes.NEW, "java/lang/Object");
-			mv.visitInsn(Opcodes.DUP);
-			mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
-			mv.visitFieldInsn(Opcodes.PUTSTATIC, "org/eclipse/osgi/util/NLS", "ASSIGNED", "Ljava/lang/Object;");
-			mv.visitInsn(Opcodes.RETURN);
-			mv.visitMaxs(2, 0);
+			mv.visitInsn(Opcodes.ARETURN);
+			mv.visitMaxs(1, 1);
 			mv.visitEnd();
 		}