@NotNull
private static String generateRemoveIf(
IteratorDeclaration declaration,
CommentTracker ct,
PsiExpression condition,
String paramName) {
return (declaration.getIterable() == null ? "" : ct.text(declaration.getIterable()) + ".")
+ "removeIf("
+ paramName
+ "->"
+ ct.text(condition)
+ ");";
}
@Override
public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
PsiElement element = descriptor.getStartElement();
if (!(element instanceof PsiLoopStatement)) return;
PsiLoopStatement loop = (PsiLoopStatement) element;
IteratorDeclaration declaration;
declaration = IteratorDeclaration.fromLoop(loop);
if (declaration == null) return;
PsiStatement body = loop.getBody();
if (!(body instanceof PsiBlockStatement)) return;
PsiStatement[] statements = ((PsiBlockStatement) body).getCodeBlock().getStatements();
PsiElementFactory factory = JavaPsiFacade.getElementFactory(project);
String replacement = null;
CommentTracker ct = new CommentTracker();
if (statements.length == 2 && statements[1] instanceof PsiIfStatement) {
PsiVariable variable = declaration.getNextElementVariable(statements[0]);
if (variable == null) return;
PsiExpression condition = ((PsiIfStatement) statements[1]).getCondition();
if (condition == null) return;
replacement = generateRemoveIf(declaration, ct, condition, variable.getName());
} else if (statements.length == 1 && statements[0] instanceof PsiIfStatement) {
PsiExpression condition = ((PsiIfStatement) statements[0]).getCondition();
if (condition == null) return;
PsiElement ref = declaration.findOnlyIteratorRef(condition);
if (ref != null) {
PsiElement call = ref.getParent().getParent();
if (!declaration.isIteratorMethodCall(call, "next")) return;
PsiType type = ((PsiExpression) call).getType();
JavaCodeStyleManager javaCodeStyleManager = JavaCodeStyleManager.getInstance(project);
SuggestedNameInfo info =
javaCodeStyleManager.suggestVariableName(VariableKind.PARAMETER, null, null, type);
if (info.names.length == 0) {
info =
javaCodeStyleManager.suggestVariableName(
VariableKind.PARAMETER, "value", null, type);
}
String paramName =
javaCodeStyleManager.suggestUniqueVariableName(info, condition, true).names[0];
ct.replace(call, factory.createIdentifier(paramName));
replacement = generateRemoveIf(declaration, ct, condition, paramName);
}
}
if (replacement == null) return;
ct.delete(declaration.getIterator());
PsiElement result = ct.replaceAndRestoreComments(loop, replacement);
LambdaCanBeMethodReferenceInspection.replaceAllLambdasWithMethodReferences(result);
CodeStyleManager.getInstance(project).reformat(result);
}