@Override
public void invoke(@NotNull Project project, Editor editor, @NotNull PsiElement element)
throws IncorrectOperationException {
try {
if (!FileModificationService.getInstance().preparePsiElementForWrite(element)) return;
final PsiJavaToken token = (PsiJavaToken) element;
final PsiPolyadicExpression expression =
SplitConditionUtil.findCondition(element, true, false);
final PsiLambdaExpression lambdaExpression =
PsiTreeUtil.getParentOfType(expression, PsiLambdaExpression.class);
LOG.assertTrue(lambdaExpression != null);
final String lambdaParameterName =
lambdaExpression.getParameterList().getParameters()[0].getName();
final PsiMethodCallExpression methodCallExpression =
PsiTreeUtil.getParentOfType(expression, PsiMethodCallExpression.class);
LOG.assertTrue(methodCallExpression != null, expression);
PsiExpression lOperand = getLOperands(expression, token);
PsiExpression rOperand = getROperands(expression, token);
final Collection<PsiComment> comments =
PsiTreeUtil.findChildrenOfType(expression, PsiComment.class);
final PsiMethodCallExpression chainedCall =
(PsiMethodCallExpression)
JavaPsiFacade.getElementFactory(project)
.createExpressionFromText(
"a.filter(" + lambdaParameterName + " -> x)", expression);
final PsiExpression argExpression = chainedCall.getArgumentList().getExpressions()[0];
final PsiElement rReplaced =
((PsiLambdaExpression) argExpression).getBody().replace(rOperand);
final PsiExpression compoundArg = methodCallExpression.getArgumentList().getExpressions()[0];
final int separatorOffset = token.getTextOffset();
for (PsiComment comment : comments) {
if (comment.getTextOffset() < separatorOffset) {
compoundArg.getParent().add(comment);
} else {
rReplaced.getParent().add(comment);
}
}
((PsiLambdaExpression) compoundArg).getBody().replace(lOperand);
chainedCall.getMethodExpression().getQualifierExpression().replace(methodCallExpression);
methodCallExpression.replace(chainedCall);
} catch (IncorrectOperationException e) {
LOG.error(e);
}
}
@Override
public void visitLambdaExpression(PsiLambdaExpression lambdaExpression) {
super.visitLambdaExpression(lambdaExpression);
if (lambdaExpression.getBody() instanceof PsiExpression) {
registerError(lambdaExpression);
}
}
private void registerNestedClosures(
@NotNull DfaInstructionState instructionState, @NotNull PsiLambdaExpression expr) {
DfaMemoryState state = instructionState.getMemoryState();
PsiElement body = expr.getBody();
if (body != null) {
myNestedClosures.putValue(body, createClosureState(state));
}
}
@Override
public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
final PsiElement element = descriptor.getPsiElement();
if (element != null) {
if (!FileModificationService.getInstance().preparePsiElementForWrite(element)) return;
final PsiLambdaExpression lambdaExpression =
PsiTreeUtil.getParentOfType(element, PsiLambdaExpression.class);
if (lambdaExpression != null) {
final PsiElement body = lambdaExpression.getBody();
if (body != null) {
PsiExpression expression = LambdaUtil.extractSingleExpressionFromBody(body);
if (expression != null) {
body.replace(expression);
}
}
}
}
}
public static boolean processDeclarationsInLambda(
@NotNull final PsiLambdaExpression lambda,
@NotNull final PsiScopeProcessor processor,
@NotNull final ResolveState state,
final PsiElement lastParent,
@NotNull final PsiElement place) {
final boolean fromBody = lastParent != null && lastParent == lambda.getBody();
return processDeclarationsInMethodLike(lambda, processor, state, place, fromBody, null);
}
@Nullable
public static PsiElement getFirstElementOnTheLine(
PsiLambdaExpression lambda, Document document, int line) {
ApplicationManager.getApplication().assertReadAccessAllowed();
TextRange lineRange = DocumentUtil.getLineTextRange(document, line);
if (!intersects(lineRange, lambda)) return null;
PsiElement body = lambda.getBody();
if (body == null || !intersects(lineRange, body)) return null;
if (body instanceof PsiCodeBlock) {
for (PsiStatement statement : ((PsiCodeBlock) body).getStatements()) {
if (intersects(lineRange, statement)) {
return statement;
}
}
return null;
}
return body;
}