Bug 73347 NPE in AdvancedQuickAssistProcessor.getInverseConditionProposals
I20040901 + plug-in export, J9 JXE Got this in log several times a day. No steps. !ENTRY org.eclipse.jdt.ui 4 10001 Sep 06, 2004 18:46:20.502 !MESSAGE Internal Error !STACK 0 java.lang.NullPointerException at org.eclipse.jdt.internal.ui.text.correction.AdvancedQuickAssistProcessor.getInverseConditionProposals(Unknown Source) at org.eclipse.jdt.internal.ui.text.correction.AdvancedQuickAssistProcessor.hasAssists(Unknown Source) at org.eclipse.jdt.internal.ui.text.correction.JavaCorrectionProcessor.hasAssists(Unknown Source) at org.eclipse.jdt.internal.ui.text.correction.QuickAssistLightBulbUpdater.calculateLightBulb(Unknown Source) at org.eclipse.jdt.internal.ui.text.correction.QuickAssistLightBulbUpdater.doSelectionChanged(Unknown Source) at org.eclipse.jdt.internal.ui.text.correction.QuickAssistLightBulbUpdater.access$0(Unknown Source) at org.eclipse.jdt.internal.ui.text.correction.QuickAssistLightBulbUpdater$1.selectionChanged(Unknown Source) at org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$PartListenerGroup.calculateASTandInform(Unknown Source) at org.eclipse.jdt.internal.ui.viewsupport.SelectionListenerWithASTManager$3.run(Unknown Source) at org.eclipse.core.internal.jobs.Worker.run(Unknown Source)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/AdvancedQuickAssistProcessor.java
if (!(coveringStatement instanceof IfStatement)) {
			return false;
		}
		IfStatement ifStatement = (IfStatement) coveringStatement;
		if (ifStatement.getElseStatement() == null) {
			return false;
		}
		
		if (resultingCollections == null) {
			return true;
		}
		
		AST ast = coveringStatement.getAST();
		ASTRewrite rewrite = ASTRewrite.create(ast);
		
		Expression inversedExpression = getInversedBooleanExpression(ast, rewrite, ifStatement.getExpression());
		Statement thenPlaceholder = (Statement) rewrite.createMoveTarget(ifStatement.getThenStatement());
		Statement elsePlaceholder = (Statement) rewrite.createMoveTarget(ifStatement.getElseStatement());
		
		IfStatement newIf = ast.newIfStatement();
		newIf.setExpression(inversedExpression);
		newIf.setThenStatement(elsePlaceholder);
		newIf.setElseStatement(thenPlaceholder);
		
		Block sourceBlock = (Block) ifStatement.getParent();
		ListRewrite listRewriter = rewrite.getListRewrite(sourceBlock,
				(ChildListPropertyDescriptor) coveringStatement.getLocationInParent());
		listRewriter.replace(ifStatement, newIf, null);
		
		String label = CorrectionMessages.getString("AdvancedQuickAssistProcessor.inverseIf.description");