From 3378cbe65553e685afaad816c260426438aa434b Mon Sep 17 00:00:00 2001
From: Reinier Zwitserloot <reinier@zwitserloot.com>
Date: Mon, 7 Mar 2016 15:21:01 +0100
Subject: @Helper is now legal in just about every place method local classes
 are legal. Also now no longer messes up syntax highlighting in eclipse.

Still need to investigate how to improve autocomplete presence of helper methods.
---
 src/core/lombok/eclipse/handlers/HandleHelper.java | 29 ++++++++++++++++------
 1 file changed, 22 insertions(+), 7 deletions(-)

(limited to 'src/core/lombok/eclipse')

diff --git a/src/core/lombok/eclipse/handlers/HandleHelper.java b/src/core/lombok/eclipse/handlers/HandleHelper.java
index 4e9a7c68..70cf35f3 100644
--- a/src/core/lombok/eclipse/handlers/HandleHelper.java
+++ b/src/core/lombok/eclipse/handlers/HandleHelper.java
@@ -33,12 +33,14 @@ import org.eclipse.jdt.internal.compiler.ast.ASTNode;
 import org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration;
 import org.eclipse.jdt.internal.compiler.ast.AllocationExpression;
 import org.eclipse.jdt.internal.compiler.ast.Annotation;
+import org.eclipse.jdt.internal.compiler.ast.Block;
 import org.eclipse.jdt.internal.compiler.ast.LocalDeclaration;
 import org.eclipse.jdt.internal.compiler.ast.MessageSend;
 import org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
 import org.eclipse.jdt.internal.compiler.ast.SingleNameReference;
 import org.eclipse.jdt.internal.compiler.ast.SingleTypeReference;
 import org.eclipse.jdt.internal.compiler.ast.Statement;
+import org.eclipse.jdt.internal.compiler.ast.SwitchStatement;
 import org.eclipse.jdt.internal.compiler.ast.ThisReference;
 import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
 import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
@@ -48,7 +50,6 @@ import org.mangosdk.spi.ProviderFor;
 import lombok.ConfigurationKeys;
 import lombok.core.AST.Kind;
 import lombok.core.AnnotationValues;
-import lombok.eclipse.Eclipse;
 import lombok.eclipse.EclipseAnnotationHandler;
 import lombok.eclipse.EclipseNode;
 import lombok.experimental.Helper;
@@ -58,19 +59,33 @@ import lombok.experimental.Helper;
  */
 @ProviderFor(EclipseAnnotationHandler.class)
 public class HandleHelper extends EclipseAnnotationHandler<Helper> {
+	private Statement[] getStatementsFromAstNode(ASTNode node) {
+		if (node instanceof Block) return ((Block) node).statements;
+		if (node instanceof AbstractMethodDeclaration) return ((AbstractMethodDeclaration) node).statements;
+		if (node instanceof SwitchStatement) return ((SwitchStatement) node).statements;
+		return null;
+	}
+	
+	private void setStatementsOfAstNode(ASTNode node, Statement[] statements) {
+		if (node instanceof Block) ((Block) node).statements = statements;
+		else if (node instanceof AbstractMethodDeclaration) ((AbstractMethodDeclaration) node).statements = statements;
+		else if (node instanceof SwitchStatement) ((SwitchStatement) node).statements = statements;
+		else throw new IllegalArgumentException("Can't set statements on node type: " + node.getClass());
+	}
+	
 	@Override public void handle(AnnotationValues<Helper> annotation, Annotation ast, EclipseNode annotationNode) {
 		handleExperimentalFlagUsage(annotationNode, ConfigurationKeys.HELPER_FLAG_USAGE, "@Helper");
 		
 		EclipseNode annotatedType = annotationNode.up();
-		EclipseNode containingMethod = annotatedType == null ? null : annotatedType.up();
-		if (annotatedType == null || containingMethod == null || annotatedType.getKind() != Kind.TYPE || containingMethod.getKind() != Kind.METHOD) {
+		EclipseNode containingBlock = annotatedType == null ? null : annotatedType.directUp();
+		Statement[] origStatements = getStatementsFromAstNode(containingBlock == null ? null : containingBlock.get());
+		
+		if (annotatedType == null || annotatedType.getKind() != Kind.TYPE || origStatements == null) {
 			annotationNode.addError("@Helper is legal only on method-local classes.");
 			return;
 		}
 		
 		TypeDeclaration annotatedType_ = (TypeDeclaration) annotatedType.get();
-		AbstractMethodDeclaration amd = (AbstractMethodDeclaration) containingMethod.get();
-		Statement[] origStatements = amd.statements;
 		int indexOfType = -1;
 		for (int i = 0; i < origStatements.length; i++) {
 			if (origStatements[i] == annotatedType_) {
@@ -105,7 +120,7 @@ public class HandleHelper extends EclipseAnnotationHandler<Helper> {
 				if (name == null || name.length == 0 || name[0] == '<') return true;
 				String n = new String(name);
 				if (Arrays.binarySearch(knownMethodNames_, n) < 0) return true;
-				messageSend.receiver = new SingleNameReference(helperName, Eclipse.pos(messageSend));
+				messageSend.receiver = new SingleNameReference(helperName, messageSend.nameSourcePosition);
 				helperUsed[0] = true;
 				return true;
 			}
@@ -132,6 +147,6 @@ public class HandleHelper extends EclipseAnnotationHandler<Helper> {
 		SetGeneratedByVisitor sgbvVisitor = new SetGeneratedByVisitor(annotationNode.get());
 		decl.traverse(sgbvVisitor, null);
 		newStatements[indexOfType + 1] = decl;
-		amd.statements = newStatements;
+		setStatementsOfAstNode(containingBlock.get(), newStatements);
 	}
 }
-- 
cgit