private static boolean tryStatementsAreEquivalent(
@NotNull PsiTryStatement statement1, @NotNull PsiTryStatement statement2) {
final PsiCodeBlock tryBlock1 = statement1.getTryBlock();
final PsiCodeBlock tryBlock2 = statement2.getTryBlock();
if (!codeBlocksAreEquivalent(tryBlock1, tryBlock2)) {
return false;
}
final PsiCodeBlock finallyBlock1 = statement1.getFinallyBlock();
final PsiCodeBlock finallyBlock2 = statement2.getFinallyBlock();
if (!codeBlocksAreEquivalent(finallyBlock1, finallyBlock2)) {
return false;
}
final PsiCodeBlock[] catchBlocks1 = statement1.getCatchBlocks();
final PsiCodeBlock[] catchBlocks2 = statement2.getCatchBlocks();
if (catchBlocks1.length != catchBlocks2.length) {
return false;
}
for (int i = 0; i < catchBlocks2.length; i++) {
if (!codeBlocksAreEquivalent(catchBlocks1[i], catchBlocks2[i])) {
return false;
}
}
final PsiParameter[] catchParameters1 = statement1.getCatchBlockParameters();
final PsiParameter[] catchParameters2 = statement2.getCatchBlockParameters();
if (catchParameters1.length != catchParameters2.length) {
return false;
}
for (int i = 0; i < catchParameters2.length; i++) {
if (!parametersAreEquivalent(catchParameters2[i], catchParameters1[i])) {
return false;
}
}
return true;
}
private static boolean tryStatementsAreEquivalent(
@NotNull PsiTryStatement statement1, @NotNull PsiTryStatement statement2) {
final PsiCodeBlock tryBlock1 = statement1.getTryBlock();
final PsiCodeBlock tryBlock2 = statement2.getTryBlock();
if (!codeBlocksAreEquivalent(tryBlock1, tryBlock2)) {
return false;
}
final PsiCodeBlock finallyBlock1 = statement1.getFinallyBlock();
final PsiCodeBlock finallyBlock2 = statement2.getFinallyBlock();
if (!codeBlocksAreEquivalent(finallyBlock1, finallyBlock2)) {
return false;
}
final PsiCodeBlock[] catchBlocks1 = statement1.getCatchBlocks();
final PsiCodeBlock[] catchBlocks2 = statement2.getCatchBlocks();
if (catchBlocks1.length != catchBlocks2.length) {
return false;
}
for (int i = 0; i < catchBlocks2.length; i++) {
if (!codeBlocksAreEquivalent(catchBlocks1[i], catchBlocks2[i])) {
return false;
}
}
final PsiResourceList resourceList1 = statement1.getResourceList();
final PsiResourceList resourceList2 = statement2.getResourceList();
if (resourceList1 != null) {
if (resourceList2 == null) {
return false;
}
if (resourceList1.getResourceVariablesCount() != resourceList2.getResourceVariablesCount()) {
return false;
}
final List<PsiResourceVariable> resourceVariables1 = resourceList1.getResourceVariables();
final List<PsiResourceVariable> resourceVariables2 = resourceList2.getResourceVariables();
for (int i1 = 0, size = resourceVariables1.size(); i1 < size; i1++) {
final PsiResourceVariable variable1 = resourceVariables1.get(i1);
final PsiResourceVariable variable2 = resourceVariables2.get(i1);
if (!localVariablesAreEquivalent(variable1, variable2)) {
return false;
}
}
} else if (resourceList2 != null) {
return false;
}
final PsiParameter[] catchParameters1 = statement1.getCatchBlockParameters();
final PsiParameter[] catchParameters2 = statement2.getCatchBlockParameters();
if (catchParameters1.length != catchParameters2.length) {
return false;
}
for (int i = 0; i < catchParameters2.length; i++) {
if (!parametersAreEquivalent(catchParameters2[i], catchParameters1[i])) {
return false;
}
}
return true;
}
private static void fixExceptions(PsiElement ref, PsiClassType[] newExceptions)
throws IncorrectOperationException {
// methods' throws lists are already modified, may use ExceptionUtil.collectUnhandledExceptions
newExceptions = filterCheckedExceptions(newExceptions);
PsiElement context = PsiTreeUtil.getParentOfType(ref, PsiTryStatement.class, PsiMethod.class);
if (context instanceof PsiTryStatement) {
PsiTryStatement tryStatement = (PsiTryStatement) context;
PsiCodeBlock tryBlock = tryStatement.getTryBlock();
// Remove unused catches
Collection<PsiClassType> classes =
ExceptionUtil.collectUnhandledExceptions(tryBlock, tryBlock);
PsiParameter[] catchParameters = tryStatement.getCatchBlockParameters();
for (PsiParameter parameter : catchParameters) {
final PsiType caughtType = parameter.getType();
if (!(caughtType instanceof PsiClassType)) continue;
if (ExceptionUtil.isUncheckedExceptionOrSuperclass((PsiClassType) caughtType)) continue;
if (!isCatchParameterRedundant((PsiClassType) caughtType, classes)) continue;
parameter.getParent().delete(); // delete catch section
}
PsiClassType[] exceptionsToAdd = filterUnhandledExceptions(newExceptions, tryBlock);
addExceptions(exceptionsToAdd, tryStatement);
adjustPossibleEmptyTryStatement(tryStatement);
} else {
newExceptions = filterUnhandledExceptions(newExceptions, ref);
if (newExceptions.length > 0) {
// Add new try statement
PsiElementFactory elementFactory = JavaPsiFacade.getElementFactory(ref.getProject());
PsiTryStatement tryStatement =
(PsiTryStatement)
elementFactory.createStatementFromText("try {} catch (Exception e) {}", null);
PsiStatement anchor = PsiTreeUtil.getParentOfType(ref, PsiStatement.class);
LOG.assertTrue(anchor != null);
tryStatement.getTryBlock().add(anchor);
tryStatement = (PsiTryStatement) anchor.getParent().addAfter(tryStatement, anchor);
addExceptions(newExceptions, tryStatement);
anchor.delete();
tryStatement.getCatchSections()[0].delete(); // Delete dummy catch section
}
}
}
private static void adjustPossibleEmptyTryStatement(PsiTryStatement tryStatement)
throws IncorrectOperationException {
PsiCodeBlock tryBlock = tryStatement.getTryBlock();
if (tryBlock != null) {
if (tryStatement.getCatchSections().length == 0 && tryStatement.getFinallyBlock() == null) {
PsiElement firstBodyElement = tryBlock.getFirstBodyElement();
if (firstBodyElement != null) {
tryStatement
.getParent()
.addRangeAfter(firstBodyElement, tryBlock.getLastBodyElement(), tryStatement);
}
tryStatement.delete();
}
}
}
@Override
protected void doFix(Project project, ProblemDescriptor descriptor)
throws IncorrectOperationException {
final PsiType thrownType = myThrown.getType();
if (thrownType == null) {
return;
}
final PsiElement typeElement = descriptor.getPsiElement();
if (typeElement == null) {
return;
}
final PsiElement catchParameter = typeElement.getParent();
if (!(catchParameter instanceof PsiParameter)) {
return;
}
final PsiElement catchBlock = ((PsiParameter) catchParameter).getDeclarationScope();
if (!(catchBlock instanceof PsiCatchSection)) {
return;
}
final PsiCatchSection myBeforeCatchSection = (PsiCatchSection) catchBlock;
final PsiTryStatement myTryStatement = myBeforeCatchSection.getTryStatement();
final JavaCodeStyleManager codeStyleManager = JavaCodeStyleManager.getInstance(project);
final String name =
codeStyleManager.suggestUniqueVariableName("e", myTryStatement.getTryBlock(), false);
final PsiElementFactory factory = JavaPsiFacade.getInstance(project).getElementFactory();
final PsiCatchSection section = factory.createCatchSection(thrownType, name, myTryStatement);
final PsiCatchSection element =
(PsiCatchSection) myTryStatement.addBefore(section, myBeforeCatchSection);
codeStyleManager.shortenClassReferences(element);
if (isOnTheFly()) {
final PsiCodeBlock newBlock = element.getCatchBlock();
assert newBlock != null;
final TextRange range = SurroundWithUtil.getRangeToSelect(newBlock);
final PsiFile file = element.getContainingFile();
final Editor editor = FileEditorManager.getInstance(project).getSelectedTextEditor();
if (editor == null) {
return;
}
final Document document = PsiDocumentManager.getInstance(project).getDocument(file);
if (editor.getDocument() != document) {
return;
}
editor.getCaretModel().moveToOffset(range.getStartOffset());
editor.getScrollingModel().scrollToCaret(ScrollType.RELATIVE);
editor.getSelectionModel().setSelection(range.getStartOffset(), range.getEndOffset());
}
}
@Override
public TextRange surroundStatements(
Project project, Editor editor, PsiElement container, PsiElement[] statements)
throws IncorrectOperationException {
PsiManager manager = PsiManager.getInstance(project);
PsiElementFactory factory = JavaPsiFacade.getInstance(manager.getProject()).getElementFactory();
CodeStyleManager codeStyleManager = CodeStyleManager.getInstance(project);
statements = SurroundWithUtil.moveDeclarationsOut(container, statements, false);
if (statements.length == 0) {
return null;
}
@NonNls String text = "try{\n}finally{\n\n}";
PsiTryStatement tryStatement = (PsiTryStatement) factory.createStatementFromText(text, null);
tryStatement = (PsiTryStatement) codeStyleManager.reformat(tryStatement);
tryStatement =
(PsiTryStatement) container.addAfter(tryStatement, statements[statements.length - 1]);
PsiCodeBlock tryBlock = tryStatement.getTryBlock();
if (tryBlock == null) {
return null;
}
SurroundWithUtil.indentCommentIfNecessary(tryBlock, statements);
tryBlock.addRange(statements[0], statements[statements.length - 1]);
container.deleteChildRange(statements[0], statements[statements.length - 1]);
PsiCodeBlock finallyBlock = tryStatement.getFinallyBlock();
if (finallyBlock == null) {
return null;
}
int offset = finallyBlock.getTextRange().getStartOffset() + 2;
editor.getCaretModel().moveToOffset(offset);
final Document document = editor.getDocument();
PsiDocumentManager.getInstance(project).doPostponedOperationsAndUnblockDocument(document);
editor.getSelectionModel().removeSelection();
final PsiStatement firstTryStmt = tryBlock.getStatements()[0];
final int indent =
firstTryStmt.getTextOffset()
- document.getLineStartOffset(document.getLineNumber(firstTryStmt.getTextOffset()));
EditorModificationUtil.insertStringAtCaret(editor, StringUtil.repeat(" ", indent), false, true);
return new TextRange(editor.getCaretModel().getOffset(), editor.getCaretModel().getOffset());
}