public static String getResult(String code) {
Project project = EnvironmentManager.getEnvironment().getProject();
JavaToKotlinConverter converter =
new JavaToKotlinConverter(
project,
ConverterSettings.Companion.getDefaultSettings(),
EmptyJavaToKotlinServices.INSTANCE);
PsiElementFactory instance = PsiElementFactory.SERVICE.getInstance(project);
List<PsiElement> inputElements = null;
PsiFile javaFile =
PsiFileFactory.getInstance(project)
.createFileFromText("test.java", JavaLanguage.INSTANCE, code);
// To create a module
ResolveUtils.getBindingContext(Collections.EMPTY_LIST, project, false);
for (PsiElement element : javaFile.getChildren()) {
if (element instanceof PsiClass) {
inputElements = Collections.<PsiElement>singletonList(javaFile);
}
}
if (inputElements == null) {
PsiClass psiClass = instance.createClassFromText(code, javaFile);
boolean errorsFound = false;
for (PsiElement element : psiClass.getChildren()) {
if (element instanceof PsiErrorElement) {
errorsFound = true;
}
}
if (!errorsFound) {
inputElements = Arrays.asList(psiClass.getChildren());
}
}
if (inputElements == null) {
PsiCodeBlock codeBlock = instance.createCodeBlockFromText("{" + code + "}", javaFile);
PsiElement[] childrenWithoutBraces =
Arrays.copyOfRange(codeBlock.getChildren(), 1, codeBlock.getChildren().length - 1);
inputElements = Arrays.asList(childrenWithoutBraces);
}
List<JavaToKotlinConverter.ElementResult> resultFormConverter =
converter.elementsToKotlin(inputElements).getResults();
String textResult = "";
for (JavaToKotlinConverter.ElementResult it : resultFormConverter) {
if (it == null) continue;
textResult = textResult + it.getText() + "\n";
}
textResult = JavaToKotlinTranslator.INSTANCE.prettify(textResult);
return textResult;
}
private static List<PsiElement> getTopLevelRegExpChars(String regExpText, Project project) {
@SuppressWarnings("deprecation")
PsiFile file = PsiFileFactory.getInstance(project).createFileFromText("A.regexp", regExpText);
List<PsiElement> result = null;
final PsiElement[] children = file.getChildren();
for (PsiElement child : children) {
PsiElement[] grandChildren = child.getChildren();
if (grandChildren.length != 1)
return Collections
.emptyList(); // a | b, more than one branch, can not predict in current way
for (PsiElement grandGrandChild : grandChildren[0].getChildren()) {
if (result == null) result = new ArrayList<>();
result.add(grandGrandChild);
}
}
return result != null ? result : Collections.<PsiElement>emptyList();
}
@Override
protected PsiElement restoreBySignatureTokens(
@NotNull PsiFile file,
@NotNull PsiElement parent,
@NotNull final String type,
@NotNull StringTokenizer tokenizer,
@Nullable StringBuilder processingInfoStorage) {
if (!TYPE_MARKER.equals(type)) {
if (processingInfoStorage != null) {
processingInfoStorage.append(
String.format(
"Stopping '%s' provider because given signature doesn't have expected type - can work with '%s' but got '%s'%n",
getClass().getName(), TYPE_MARKER, type));
}
return null;
}
String elementMarker = tokenizer.nextToken();
if (TOP_LEVEL_CHILD_MARKER.equals(elementMarker)) {
PsiElement result = null;
for (PsiElement child = file.getFirstChild(); child != null; child = child.getNextSibling()) {
if (child instanceof PsiWhiteSpace) {
continue;
}
if (result == null) {
result = child;
} else {
if (processingInfoStorage != null) {
processingInfoStorage.append(
String.format(
"Stopping '%s' provider because it has top level marker but more than one non white-space child: %s%n",
getClass().getName(), Arrays.toString(file.getChildren())));
}
// More than one top-level non-white space children. Can't match.
return null;
}
}
if (processingInfoStorage != null) {
processingInfoStorage.append(
String.format(
"Finished processing of '%s' provider because all of its top-level children have been processed: %s%n",
getClass().getName(), Arrays.toString(file.getChildren())));
}
return result;
}
if (DOC_COMMENT_MARKER.equals(elementMarker)) {
PsiElement candidate = parent.getFirstChild();
return candidate instanceof PsiComment ? candidate : null;
}
if (CODE_BLOCK_MARKER.equals(elementMarker)) {
int index = 0;
if (tokenizer.hasMoreTokens()) {
String indexStr = tokenizer.nextToken();
try {
index = Integer.parseInt(indexStr);
} catch (NumberFormatException e) {
if (processingInfoStorage != null) {
processingInfoStorage.append("Invalid block index: ").append(indexStr).append("\n");
}
}
}
for (PsiElement child = parent.getFirstChild();
child != null;
child = child.getNextSibling()) {
if (isBlockElement(child)) {
if (--index < 0) {
return child;
}
}
}
return null;
}
if (!tokenizer.hasMoreTokens()) {
if (processingInfoStorage != null) {
processingInfoStorage.append(
String.format(
"Stopping '%s' provider because it has no more data to process%n",
getClass().getName()));
}
return null;
}
try {
int index = Integer.parseInt(tokenizer.nextToken());
if (processingInfoStorage != null) {
processingInfoStorage.append(
String.format(
"Looking for the child with a name '%s' # %d at the element '%s'%n",
elementMarker, index, parent));
}
return restoreElementInternal(parent, unescape(elementMarker), index, PsiNamedElement.class);
} catch (NumberFormatException e) {
return null;
}
}