Bug 120389 [quick fix] replace conditional with if-else removes + from +=
Using Build I20051102-1600. I create a class [snip] package bla; class Bla { void bla() { boolean cond = true; int i = 42; i += ( cond ) ? 1 : 2; } } [snap] Now I move the cursor over the second cond and trigger the Quickfix 'Replace conditional with if-else'. This results in [snip] int i = 42; if (cond) i = 1; else i = 2; [snap] i.e. replaces the '+=' with '='. (Credit to Jordi Boehme for finding this.)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/AdvancedQuickAssistProcessor.java
ASTNode ifPlaceholder = rewrite.createMoveTarget(ifStatement);
		outerBlock.statements().add(ifPlaceholder);
		
		rewrite.replace(ifStatement, outerIfStatement, null);
		
		String label = CorrectionMessages.AdvancedQuickAssistProcessor_splitAndCondition_description;
		Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
		ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(),
				rewrite, 1, image);
		resultingCollections.add(proposal);
		return true;
	}
	private static boolean isSelectingOperator(ASTNode n1, ASTNode n2, int offset, int length) {
		
		if (offset + length <= n2.getStartPosition() && offset >= ASTNodes.getExclusiveEnd(n1)) {
			return true;
		}
		
		if (n1.getStartPosition() == offset && ASTNodes.getExclusiveEnd(n2) == offset + length) {
			if (n1 instanceof InfixExpression || n2 instanceof InfixExpression) {
				return false;
			}
			return true;
		}
		return false;
	}
	
	private static int isOperatorSelected(InfixExpression infixExpression, int offset, int length) {
		ASTNode left= infixExpression.getLeftOperand();
		ASTNode right= infixExpression.getRightOperand();