Rewritten @Cleanup's new null analysis prevention to not use

Lombok.preventNullAnalysis but go with Collections.singletonList(expr).get(0)
instead; while this does create a pointless object, it doesn't cause a clash
when eclipse has lombok 0.10 installed but the project uses 0.9, which doesn't
have preventNullAnalysis. Eventually, once 0.9 is long forgotten, this can be reverted.

src/core/lombok/eclipse/handlers/HandleCleanup.java

@@ -42,6 +42,7 @@ import org.eclipse.jdt.internal.compiler.ast.CastExpression;
 import org.eclipse.jdt.internal.compiler.ast.EqualExpression;
 import org.eclipse.jdt.internal.compiler.ast.Expression;
 import org.eclipse.jdt.internal.compiler.ast.IfStatement;
+import org.eclipse.jdt.internal.compiler.ast.IntLiteral;
 import org.eclipse.jdt.internal.compiler.ast.LocalDeclaration;
 import org.eclipse.jdt.internal.compiler.ast.MemberValuePair;
 import org.eclipse.jdt.internal.compiler.ast.MessageSend;
@@ -174,16 +175,7 @@ public class HandleCleanup implements EclipseAnnotationHandler<Cleanup> {
 		NullLiteral nullLiteral = new NullLiteral(pS, pE);
 		Eclipse.setGeneratedBy(nullLiteral, ast);
 		
-		MessageSend preventNullAnalysis = new MessageSend();
-		Eclipse.setGeneratedBy(preventNullAnalysis, ast);
-
-		preventNullAnalysis.receiver = createNameReference("lombok.Lombok", ast);
-		preventNullAnalysis.selector = "preventNullAnalysis".toCharArray();
-		
-		preventNullAnalysis.arguments = new Expression[] { varName };
-		preventNullAnalysis.nameSourcePosition = p;
-		preventNullAnalysis.sourceStart = pS;
-		preventNullAnalysis.sourceEnd = preventNullAnalysis.statementEnd = pE;
+		MessageSend preventNullAnalysis = preventNullAnalysis(ast, varName);
 		
 		EqualExpression equalExpression = new EqualExpression(preventNullAnalysis, nullLiteral, OperatorIds.NOT_EQUAL);
 		equalExpression.sourceStart = pS; equalExpression.sourceEnd = pE;
@@ -195,8 +187,6 @@ public class HandleCleanup implements EclipseAnnotationHandler<Cleanup> {
 		Eclipse.setGeneratedBy(closeBlock, ast);
 		IfStatement ifStatement = new IfStatement(equalExpression, closeBlock, 0, 0);
 		Eclipse.setGeneratedBy(ifStatement, ast);
-
-		
 		
 		finallyBlock[0] = ifStatement;
 		tryStatement.finallyBlock = new Block(0);
@@ -219,6 +209,35 @@ public class HandleCleanup implements EclipseAnnotationHandler<Cleanup> {
 		return true;
 	}
 	
+	private MessageSend preventNullAnalysis(Annotation ast, Expression expr) {
+		MessageSend singletonList = new MessageSend();
+		Eclipse.setGeneratedBy(singletonList, ast);
+		
+		int pS = ast.sourceStart, pE = ast.sourceEnd;
+		long p = (long)pS << 32 | pE;
+		
+		singletonList.receiver = createNameReference("java.util.Collections", ast);
+		singletonList.selector = "singletonList".toCharArray();
+		
+		singletonList.arguments = new Expression[] { expr };
+		singletonList.nameSourcePosition = p;
+		singletonList.sourceStart = pS;
+		singletonList.sourceEnd = singletonList.statementEnd = pE;
+		
+		MessageSend preventNullAnalysis = new MessageSend();
+		Eclipse.setGeneratedBy(preventNullAnalysis, ast);
+		
+		preventNullAnalysis.receiver = singletonList;
+		preventNullAnalysis.selector = "get".toCharArray();
+		
+		preventNullAnalysis.arguments = new Expression[] { new IntLiteral(new char[] { '0' }, pS, pE) };
+		preventNullAnalysis.nameSourcePosition = p;
+		preventNullAnalysis.sourceStart = pS;
+		preventNullAnalysis.sourceEnd = singletonList.statementEnd = pE;
+		
+		return preventNullAnalysis;
+	}
+	
 	private void doAssignmentCheck(EclipseNode node, Statement[] tryBlock, char[] varName) {
 		for (Statement statement : tryBlock) doAssignmentCheck0(node, statement, varName);
 	}

src/core/lombok/javac/handlers/HandleCleanup.java

@@ -117,7 +117,7 @@ public class HandleCleanup implements JavacAnnotationHandler<Cleanup> {
 		List<JCStatement> cleanupCall = List.<JCStatement>of(maker.Exec(
 				maker.Apply(List.<JCExpression>nil(), cleanupMethod, List.<JCExpression>nil())));
 		
-		JCMethodInvocation preventNullAnalysis = maker.Apply(List.<JCExpression>nil(), JavacHandlerUtil.chainDotsString(maker, annotationNode, "lombok.Lombok.preventNullAnalysis"), List.<JCExpression>of(maker.Ident(decl.name)));
+		JCMethodInvocation preventNullAnalysis = preventNullAnalysis(maker, annotationNode, maker.Ident(decl.name));
 		JCBinary isNull = maker.Binary(Javac.getCTCint(JCTree.class, "NE"), preventNullAnalysis, maker.Literal(Javac.getCTCint(TypeTags.class, "BOT"), null));
 		
 		JCIf ifNotNullCleanup = maker.If(isNull, maker.Block(0, cleanupCall), null);
@@ -139,6 +139,12 @@ public class HandleCleanup implements JavacAnnotationHandler<Cleanup> {
 		return true;
 	}
 	
+	private JCMethodInvocation preventNullAnalysis(TreeMaker maker, JavacNode node, JCExpression expression) {
+		JCMethodInvocation singletonList = maker.Apply(List.<JCExpression>nil(), JavacHandlerUtil.chainDotsString(maker, node, "java.util.Collections.singletonList"), List.of(expression));
+		JCMethodInvocation cleanedExpr = maker.Apply(List.<JCExpression>nil(), maker.Select(singletonList, node.toName("get")) , List.<JCExpression>of(maker.Literal(TypeTags.INT, 0)));
+		return cleanedExpr;
+	}
+	
 	private void doAssignmentCheck(JavacNode node, List<JCStatement> statements, Name name) {
 		for (JCStatement statement : statements) doAssignmentCheck0(node, statement, name);
 	}

test/transform/resource/after-delombok/CleanupName.java

@@ -4,7 +4,7 @@ class CleanupName {
 		try {
 			System.out.println(o);
 		} finally {
-			if (lombok.Lombok.preventNullAnalysis(o) != null) {
+			if (java.util.Collections.singletonList(o).get(0) != null) {
 				o.toString();
 			}
 		}
@@ -14,7 +14,7 @@ class CleanupName {
 		try {
 			System.out.println(o);
 		} finally {
-			if (lombok.Lombok.preventNullAnalysis(o) != null) {
+			if (java.util.Collections.singletonList(o).get(0) != null) {
 				o.toString();
 			}
 		}

test/transform/resource/after-delombok/CleanupPlain.java

@@ -9,12 +9,12 @@ class CleanupPlain {
 					out.flush();
 				}
 			} finally {
-				if (lombok.Lombok.preventNullAnalysis(out) != null) {
+				if (java.util.Collections.singletonList(out).get(0) != null) {
 					out.close();
 				}
 			}
 		} finally {
-			if (lombok.Lombok.preventNullAnalysis(in) != null) {
+			if (java.util.Collections.singletonList(in).get(0) != null) {
 				in.close();
 			}
 		}

test/transform/resource/after-ecj/CleanupName.java

@@ -10,7 +10,7 @@ class CleanupName {
       }
     finally
       {
-        if ((lombok.Lombok.preventNullAnalysis(o) != null))
+        if ((java.util.Collections.singletonList(o).get(0) != null))
             {
               o.toString();
             }
@@ -24,7 +24,7 @@ class CleanupName {
       }
     finally
       {
-        if ((lombok.Lombok.preventNullAnalysis(o) != null))
+        if ((java.util.Collections.singletonList(o).get(0) != null))
             {
               o.toString();
             }

test/transform/resource/after-ecj/CleanupPlain.java

@@ -18,7 +18,7 @@ class CleanupPlain {
           }
         finally
           {
-            if ((lombok.Lombok.preventNullAnalysis(out) != null))
+            if ((java.util.Collections.singletonList(out).get(0) != null))
                 {
                   out.close();
                 }
@@ -26,7 +26,7 @@ class CleanupPlain {
       }
     finally
       {
-        if ((lombok.Lombok.preventNullAnalysis(in) != null))
+        if ((java.util.Collections.singletonList(in).get(0) != null))
             {
               in.close();
             }