private void findUsagesForInnerClass(PsiClass innerClass, List<FixableUsageInfo> usages) {
final PsiManager psiManager = innerClass.getManager();
final Project project = psiManager.getProject();
final GlobalSearchScope scope = GlobalSearchScope.allScope(project);
final Iterable<PsiReference> calls = ReferencesSearch.search(innerClass, scope);
final String innerName = innerClass.getQualifiedName();
assert innerName != null;
final String sourceClassQualifiedName = sourceClass.getQualifiedName();
assert sourceClassQualifiedName != null;
final String newInnerClassName =
getQualifiedName() + innerName.substring(sourceClassQualifiedName.length());
boolean hasExternalReference = false;
for (PsiReference reference : calls) {
final PsiElement referenceElement = reference.getElement();
if (referenceElement instanceof PsiJavaCodeReferenceElement) {
if (!isInMovedElement(referenceElement)) {
usages.add(
new ReplaceClassReference(
(PsiJavaCodeReferenceElement) referenceElement, newInnerClassName));
hasExternalReference = true;
}
}
}
if (hasExternalReference) {
innerClassesToMakePublic.add(innerClass);
}
}
private NecessaryAccessorsVisitor checkNecessaryGettersSetters4SourceClass() {
final NecessaryAccessorsVisitor visitor =
new NecessaryAccessorsVisitor() {
@Override
protected boolean hasGetterOrSetter(PsiMethod[] getters) {
for (PsiMethod getter : getters) {
if (!isInMovedElement(getter)) return true;
}
return false;
}
@Override
protected boolean isProhibitedReference(PsiField field) {
if (fields.contains(field)) {
return false;
}
if (innerClasses.contains(field.getContainingClass())) {
return false;
}
return true;
}
};
for (PsiField field : fields) {
field.accept(visitor);
}
for (PsiMethod method : methods) {
method.accept(visitor);
}
for (PsiClass innerClass : innerClasses) {
innerClass.accept(visitor);
}
return visitor;
}
public ExtractClassProcessor(
PsiClass sourceClass,
List<PsiField> fields,
List<PsiMethod> methods,
List<PsiClass> classes,
String packageName,
MoveDestination moveDestination,
String newClassName,
String newVisibility,
boolean generateAccessors,
List<MemberInfo> enumConstants) {
super(sourceClass.getProject());
this.sourceClass = sourceClass;
this.newPackageName = packageName;
myMoveDestination = moveDestination;
myNewVisibility = newVisibility;
myGenerateAccessors = generateAccessors;
this.enumConstants = new ArrayList<PsiField>();
for (MemberInfo constant : enumConstants) {
if (constant.isChecked()) {
this.enumConstants.add((PsiField) constant.getMember());
}
}
this.fields = new ArrayList<PsiField>(fields);
this.methods = new ArrayList<PsiMethod>(methods);
this.innerClasses = new ArrayList<PsiClass>(classes);
this.newClassName = newClassName;
delegateFieldName = calculateDelegateFieldName();
requiresBackpointer =
new BackpointerUsageVisitor(fields, innerClasses, methods, sourceClass)
.backpointerRequired();
if (requiresBackpointer) {
ContainerUtil.addAll(typeParams, sourceClass.getTypeParameters());
} else {
final Set<PsiTypeParameter> typeParamSet = new HashSet<PsiTypeParameter>();
final TypeParametersVisitor visitor = new TypeParametersVisitor(typeParamSet);
for (PsiField field : fields) {
field.accept(visitor);
}
for (PsiMethod method : methods) {
method.accept(visitor);
// do not include method's type parameters in class signature
typeParamSet.removeAll(Arrays.asList(method.getTypeParameters()));
}
typeParams.addAll(typeParamSet);
}
myClass =
new WriteCommandAction<PsiClass>(myProject, getCommandName()) {
@Override
protected void run(@NotNull Result<PsiClass> result) throws Throwable {
result.setResult(buildClass());
}
}.execute().getResultObject();
myExtractEnumProcessor = new ExtractEnumProcessor(myProject, this.enumConstants, myClass);
}
private void calculateInitializersConflicts(MultiMap<PsiElement, String> conflicts) {
final PsiClassInitializer[] initializers = sourceClass.getInitializers();
for (PsiClassInitializer initializer : initializers) {
if (initializerDependsOnMoved(initializer)) {
conflicts.putValue(initializer, "Class initializer requires moved members");
}
}
for (PsiMethod constructor : sourceClass.getConstructors()) {
if (initializerDependsOnMoved(constructor.getBody())) {
conflicts.putValue(constructor, "Constructor requires moved members");
}
}
}
@Override
protected boolean preprocessUsages(@NotNull final Ref<UsageInfo[]> refUsages) {
final MultiMap<PsiElement, String> conflicts = new MultiMap<PsiElement, String>();
myExtractEnumProcessor.findEnumConstantConflicts(refUsages);
if (!DestinationFolderComboBox.isAccessible(
myProject,
sourceClass.getContainingFile().getVirtualFile(),
myClass.getContainingFile().getContainingDirectory().getVirtualFile())) {
conflicts.putValue(
sourceClass,
"Extracted class won't be accessible in "
+ RefactoringUIUtil.getDescription(sourceClass, true));
}
ApplicationManager.getApplication()
.runWriteAction(
new Runnable() {
public void run() {
myClass.delete();
}
});
final Project project = sourceClass.getProject();
final GlobalSearchScope scope = GlobalSearchScope.allScope(project);
final PsiClass existingClass =
JavaPsiFacade.getInstance(project).findClass(getQualifiedName(), scope);
if (existingClass != null) {
conflicts.putValue(
existingClass,
RefactorJBundle.message("cannot.perform.the.refactoring")
+ RefactorJBundle.message("there.already.exists.a.class.with.the.chosen.name"));
}
if (!myGenerateAccessors) {
calculateInitializersConflicts(conflicts);
final NecessaryAccessorsVisitor visitor = checkNecessaryGettersSetters4ExtractedClass();
final NecessaryAccessorsVisitor srcVisitor = checkNecessaryGettersSetters4SourceClass();
final Set<PsiField> fieldsNeedingGetter = new LinkedHashSet<PsiField>();
fieldsNeedingGetter.addAll(visitor.getFieldsNeedingGetter());
fieldsNeedingGetter.addAll(srcVisitor.getFieldsNeedingGetter());
for (PsiField field : fieldsNeedingGetter) {
conflicts.putValue(field, "Field \'" + field.getName() + "\' needs getter");
}
final Set<PsiField> fieldsNeedingSetter = new LinkedHashSet<PsiField>();
fieldsNeedingSetter.addAll(visitor.getFieldsNeedingSetter());
fieldsNeedingSetter.addAll(srcVisitor.getFieldsNeedingSetter());
for (PsiField field : fieldsNeedingSetter) {
conflicts.putValue(field, "Field \'" + field.getName() + "\' needs setter");
}
}
checkConflicts(refUsages, conflicts);
return showConflicts(conflicts, refUsages.get());
}
private boolean existsFieldWithName(String name) {
final PsiField[] allFields = sourceClass.getAllFields();
for (PsiField field : allFields) {
if (name.equals(field.getName()) && !fields.contains(field)) {
return true;
}
}
return false;
}
private void buildDelegate() {
final PsiManager manager = sourceClass.getManager();
final PsiElementFactory factory =
JavaPsiFacade.getInstance(manager.getProject()).getElementFactory();
final CodeStyleManager codeStyleManager = CodeStyleManager.getInstance(manager.getProject());
@NonNls final StringBuilder fieldBuffer = new StringBuilder();
final String delegateVisibility = calculateDelegateVisibility();
if (delegateVisibility.length() > 0) fieldBuffer.append(delegateVisibility).append(' ');
fieldBuffer.append("final ");
final String fullyQualifiedName = getQualifiedName();
fieldBuffer.append(fullyQualifiedName);
if (!typeParams.isEmpty()) {
fieldBuffer.append('<');
for (PsiTypeParameter typeParameter : typeParams) {
fieldBuffer.append(typeParameter.getName());
}
fieldBuffer.append('>');
}
fieldBuffer.append(' ');
fieldBuffer.append(delegateFieldName);
fieldBuffer.append(" = new ").append(fullyQualifiedName);
if (!typeParams.isEmpty()) {
fieldBuffer.append('<');
for (PsiTypeParameter typeParameter : typeParams) {
fieldBuffer.append(typeParameter.getName());
}
fieldBuffer.append('>');
}
fieldBuffer.append('(');
if (requiresBackpointer) {
fieldBuffer.append("this");
}
fieldBuffer.append(");");
try {
final String fieldString = fieldBuffer.toString();
final PsiField field = factory.createFieldFromText(fieldString, sourceClass);
final PsiElement newField = sourceClass.add(field);
codeStyleManager.reformat(
JavaCodeStyleManager.getInstance(myProject).shortenClassReferences(newField));
} catch (IncorrectOperationException e) {
logger.error(e);
}
}
private static boolean usesDefaultClone(PsiClass aClass) {
final Project project = aClass.getProject();
final PsiManager manager = aClass.getManager();
final GlobalSearchScope scope = GlobalSearchScope.allScope(project);
final PsiClass cloneable =
JavaPsiFacade.getInstance(manager.getProject()).findClass("java.lang.Cloneable", scope);
if (!InheritanceUtil.isInheritorOrSelf(aClass, cloneable, true)) {
return false;
}
final PsiMethod[] methods = aClass.findMethodsByName("clone", false);
for (PsiMethod method : methods) {
final PsiParameterList parameterList = method.getParameterList();
final PsiParameter[] parameters = parameterList.getParameters();
if (parameters.length == 0) {
return false;
}
}
return true;
}
private static boolean usesDefaultSerialization(PsiClass aClass) {
final Project project = aClass.getProject();
final PsiManager manager = aClass.getManager();
final GlobalSearchScope scope = GlobalSearchScope.allScope(project);
final PsiClass serializable =
JavaPsiFacade.getInstance(manager.getProject()).findClass("java.io.Serializable", scope);
if (!InheritanceUtil.isInheritorOrSelf(aClass, serializable, true)) {
return false;
}
final PsiMethod[] methods = aClass.findMethodsByName("writeObject", false);
for (PsiMethod method : methods) {
final PsiParameterList parameterList = method.getParameterList();
final PsiParameter[] parameters = parameterList.getParameters();
if (parameters.length == 1) {
final PsiType type = parameters[0].getType();
final String text = type.getCanonicalText();
if ("java.io.DataOutputStream".equals(text)) {
return false;
}
}
}
return true;
}
private NecessaryAccessorsVisitor checkNecessaryGettersSetters4ExtractedClass() {
final NecessaryAccessorsVisitor visitor =
new NecessaryAccessorsVisitor() {
@Override
protected boolean hasGetterOrSetter(PsiMethod[] getters) {
for (PsiMethod getter : getters) {
if (isInMovedElement(getter)) return true;
}
return false;
}
@Override
protected boolean isProhibitedReference(PsiField field) {
if (fields.contains(field)) {
return true;
}
if (innerClasses.contains(field.getContainingClass())) {
return true;
}
return false;
}
@Override
public void visitMethod(PsiMethod method) {
if (methods.contains(method)) return;
super.visitMethod(method);
}
@Override
public void visitField(PsiField field) {
if (fields.contains(field)) return;
super.visitField(field);
}
@Override
public void visitClass(PsiClass aClass) {
if (innerClasses.contains(aClass)) return;
super.visitClass(aClass);
}
};
sourceClass.accept(visitor);
return visitor;
}
private String calculateDelegateFieldName() {
final Project project = sourceClass.getProject();
final CodeStyleSettingsManager settingsManager = CodeStyleSettingsManager.getInstance(project);
final CodeStyleSettings settings = settingsManager.getCurrentSettings();
final String baseName =
settings.FIELD_NAME_PREFIX.length() == 0
? StringUtil.decapitalize(newClassName)
: newClassName;
String name = settings.FIELD_NAME_PREFIX + baseName + settings.FIELD_NAME_SUFFIX;
if (!existsFieldWithName(name) && !PsiNameHelper.getInstance(project).isKeyword(name)) {
return name;
}
int counter = 1;
while (true) {
name = settings.FIELD_NAME_PREFIX + baseName + counter + settings.FIELD_NAME_SUFFIX;
if (!existsFieldWithName(name) && !PsiNameHelper.getInstance(project).isKeyword(name)) {
return name;
}
counter++;
}
}
private List<PsiClass> calculateInterfacesSupported() {
final List<PsiClass> out = new ArrayList<PsiClass>();
final PsiClass[] supers = sourceClass.getSupers();
for (PsiClass superClass : supers) {
if (!superClass.isInterface()) {
continue;
}
final PsiMethod[] superclassMethods = superClass.getMethods();
if (superclassMethods.length == 0) {
continue;
}
boolean allMethodsCovered = true;
for (PsiMethod method : superclassMethods) {
boolean isCovered = false;
for (PsiMethod movedMethod : methods) {
if (isSuperMethod(method, movedMethod)) {
isCovered = true;
break;
}
}
if (!isCovered) {
allMethodsCovered = false;
break;
}
}
if (allMethodsCovered) {
out.add(superClass);
}
}
final Project project = sourceClass.getProject();
final PsiManager manager = sourceClass.getManager();
final GlobalSearchScope scope = GlobalSearchScope.allScope(project);
if (usesDefaultSerialization(sourceClass)) {
final PsiClass serializable =
JavaPsiFacade.getInstance(manager.getProject()).findClass("java.io.Serializable", scope);
out.add(serializable);
}
if (usesDefaultClone(sourceClass)) {
final PsiClass cloneable =
JavaPsiFacade.getInstance(manager.getProject()).findClass("java.lang.Cloneable", scope);
out.add(cloneable);
}
return out;
}
private PsiClass buildClass() {
final PsiManager manager = sourceClass.getManager();
final Project project = sourceClass.getProject();
final ExtractedClassBuilder extractedClassBuilder = new ExtractedClassBuilder();
extractedClassBuilder.setProject(myProject);
extractedClassBuilder.setClassName(newClassName);
extractedClassBuilder.setPackageName(newPackageName);
extractedClassBuilder.setOriginalClassName(sourceClass.getQualifiedName());
extractedClassBuilder.setRequiresBackPointer(requiresBackpointer);
extractedClassBuilder.setExtractAsEnum(enumConstants);
for (PsiField field : fields) {
extractedClassBuilder.addField(field);
}
for (PsiMethod method : methods) {
extractedClassBuilder.addMethod(method);
}
for (PsiClass innerClass : innerClasses) {
extractedClassBuilder.addInnerClass(
innerClass, innerClassesToMakePublic.contains(innerClass));
}
extractedClassBuilder.setTypeArguments(typeParams);
final List<PsiClass> interfaces = calculateInterfacesSupported();
extractedClassBuilder.setInterfaces(interfaces);
if (myGenerateAccessors) {
final NecessaryAccessorsVisitor visitor = checkNecessaryGettersSetters4ExtractedClass();
sourceClass.accept(visitor);
extractedClassBuilder.setFieldsNeedingGetters(visitor.getFieldsNeedingGetter());
extractedClassBuilder.setFieldsNeedingSetters(visitor.getFieldsNeedingSetter());
}
final String classString = extractedClassBuilder.buildBeanClass();
if (extractInnerClass) {
final PsiFileFactory factory = PsiFileFactory.getInstance(project);
final PsiJavaFile newFile =
(PsiJavaFile)
factory.createFileFromText(
newClassName + ".java", JavaFileType.INSTANCE, classString);
final PsiClass psiClass = newFile.getClasses()[0];
if (!psiClass.isEnum()) {
final PsiModifierList modifierList = psiClass.getModifierList();
assert modifierList != null;
modifierList.setModifierProperty(PsiModifier.STATIC, true);
}
final PsiElement addedClass = sourceClass.add(psiClass);
return (PsiClass)
CodeStyleManager.getInstance(manager)
.reformat(
JavaCodeStyleManager.getInstance(project).shortenClassReferences(addedClass));
}
try {
final PsiFile containingFile = sourceClass.getContainingFile();
final PsiDirectory directory;
final PsiDirectory containingDirectory = containingFile.getContainingDirectory();
if (myMoveDestination != null) {
directory = myMoveDestination.getTargetDirectory(containingDirectory);
} else {
final Module module = ModuleUtil.findModuleForPsiElement(containingFile);
assert module != null;
directory =
PackageUtil.findOrCreateDirectoryForPackage(
module, newPackageName, containingDirectory, false, true);
}
if (directory != null) {
final PsiFileFactory factory = PsiFileFactory.getInstance(project);
final PsiFile newFile =
factory.createFileFromText(newClassName + ".java", JavaFileType.INSTANCE, classString);
final PsiElement addedFile = directory.add(newFile);
final CodeStyleManager codeStyleManager =
CodeStyleManager.getInstance(manager.getProject());
final PsiElement shortenedFile =
JavaCodeStyleManager.getInstance(project).shortenClassReferences(addedFile);
return ((PsiJavaFile) codeStyleManager.reformat(shortenedFile)).getClasses()[0];
} else {
return null;
}
} catch (IncorrectOperationException e) {
return null;
}
}
protected void performRefactoring(@NotNull UsageInfo[] usageInfos) {
final PsiClass psiClass = buildClass();
if (psiClass == null) return;
if (delegationRequired) {
buildDelegate();
}
myExtractEnumProcessor.performEnumConstantTypeMigration(usageInfos);
final Set<PsiMember> members = new HashSet<PsiMember>();
for (PsiMethod method : methods) {
final PsiMethod member = psiClass.findMethodBySignature(method, false);
if (member != null) {
members.add(member);
}
}
for (PsiField field : fields) {
final PsiField member = psiClass.findFieldByName(field.getName(), false);
if (member != null) {
members.add(member);
final PsiExpression initializer = member.getInitializer();
if (initializer != null) {
final boolean[] moveInitializerToConstructor = new boolean[1];
initializer.accept(
new JavaRecursiveElementWalkingVisitor() {
@Override
public void visitReferenceExpression(PsiReferenceExpression expression) {
super.visitReferenceExpression(expression);
final PsiElement resolved = expression.resolve();
if (resolved instanceof PsiField && !members.contains(resolved)) {
moveInitializerToConstructor[0] = true;
}
}
});
if (moveInitializerToConstructor[0]) {
final PsiElementFactory elementFactory = JavaPsiFacade.getElementFactory(myProject);
PsiMethod[] constructors = psiClass.getConstructors();
if (constructors.length == 0) {
final PsiMethod constructor =
(PsiMethod) elementFactory.createConstructor().setName(psiClass.getName());
constructors = new PsiMethod[] {(PsiMethod) psiClass.add(constructor)};
}
for (PsiMethod constructor : constructors) {
MoveInstanceMembersUtil.moveInitializerToConstructor(
elementFactory, constructor, member);
}
}
}
}
}
if (myGenerateAccessors) {
final NecessaryAccessorsVisitor visitor = checkNecessaryGettersSetters4SourceClass();
for (PsiField field : visitor.getFieldsNeedingGetter()) {
sourceClass.add(GenerateMembersUtil.generateGetterPrototype(field));
}
for (PsiField field : visitor.getFieldsNeedingSetter()) {
sourceClass.add(GenerateMembersUtil.generateSetterPrototype(field));
}
}
super.performRefactoring(usageInfos);
if (myNewVisibility == null) return;
for (PsiMember member : members) {
VisibilityUtil.fixVisibility(UsageViewUtil.toElements(usageInfos), member, myNewVisibility);
}
}