| /* |
| * Copyright 2000-2011 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.intellij.refactoring.typeMigration; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * @author db |
| * Date: Nov 4, 2004 |
| */ |
| public class Util { |
| private Util() { } |
| |
| public static PsiElement getEssentialParent(final PsiElement element) { |
| final PsiElement parent = element.getParent(); |
| |
| if (parent instanceof PsiParenthesizedExpression) { |
| return getEssentialParent(parent); |
| } |
| |
| return parent; |
| } |
| |
| @Nullable |
| public static PsiElement normalizeElement(final PsiElement element) { |
| if (element instanceof PsiMethod) { |
| final PsiMethod superMethod = ((PsiMethod)element).findDeepestSuperMethod(); |
| |
| return superMethod == null ? element : superMethod; |
| } |
| else if (element instanceof PsiParameter && element.getParent() instanceof PsiParameterList) { |
| final PsiElement declarationScope = ((PsiParameter)element).getDeclarationScope(); |
| if (declarationScope instanceof PsiLambdaExpression) { |
| final PsiType interfaceType = ((PsiLambdaExpression)declarationScope).getFunctionalInterfaceType(); |
| if (interfaceType != null) { |
| final PsiMethod interfaceMethod = LambdaUtil.getFunctionalInterfaceMethod(interfaceType); |
| if (interfaceMethod != null) { |
| final int index = ((PsiParameterList)element.getParent()).getParameterIndex((PsiParameter)element); |
| return interfaceMethod.getParameterList().getParameters()[index]; |
| } |
| } |
| return null; |
| } |
| final PsiMethod method = PsiTreeUtil.getParentOfType(element, PsiMethod.class); |
| |
| if (method != null) { |
| final int index = method.getParameterList().getParameterIndex(((PsiParameter)element)); |
| final PsiMethod superMethod = method.findDeepestSuperMethod(); |
| |
| if (superMethod != null) { |
| return superMethod.getParameterList().getParameters()[index]; |
| } |
| } |
| } |
| |
| return element; |
| } |
| |
| public static boolean canBeMigrated(final PsiElement e) { |
| if (e == null) { |
| return false; |
| } |
| |
| final PsiElement element = normalizeElement(e); |
| |
| if (element == null || !element.getManager().isInProject(element)) { |
| return false; |
| } |
| |
| final PsiType type = TypeMigrationLabeler.getElementType(element); |
| |
| if (type != null) { |
| final PsiType elementType = type instanceof PsiArrayType ? type.getDeepComponentType() : type; |
| |
| if (elementType instanceof PsiPrimitiveType) { |
| return !elementType.equals(PsiType.VOID); |
| } |
| |
| if (elementType instanceof PsiClassType) { |
| final PsiClass aClass = ((PsiClassType)elementType).resolve(); |
| return aClass != null; |
| } |
| else if (elementType instanceof PsiDisjunctionType) { |
| final PsiType lub = ((PsiDisjunctionType)elementType).getLeastUpperBound(); |
| return lub != null; |
| } |
| } |
| |
| return false; |
| } |
| } |