| /* |
| * Copyright 2003-2011 Dave Griffith, Bas Leijdekkers |
| * |
| * 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.siyeh.ig.performance; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.util.InheritanceUtil; |
| import org.jetbrains.annotations.NotNull; |
| |
| class MethodReferenceVisitor extends JavaRecursiveElementVisitor { |
| |
| private boolean m_referencesStaticallyAccessible = true; |
| private final PsiMember m_method; |
| |
| MethodReferenceVisitor(PsiMember method) { |
| m_method = method; |
| } |
| |
| public boolean areReferencesStaticallyAccessible() { |
| return m_referencesStaticallyAccessible; |
| } |
| |
| @Override |
| public void visitElement(PsiElement element) { |
| if (!m_referencesStaticallyAccessible) { |
| return; |
| } |
| super.visitElement(element); |
| } |
| |
| @Override |
| public void visitReferenceElement( |
| PsiJavaCodeReferenceElement reference) { |
| super.visitReferenceElement(reference); |
| final PsiElement resolvedElement = reference.resolve(); |
| if (!(resolvedElement instanceof PsiClass)) { |
| return; |
| } |
| final PsiClass aClass = (PsiClass)resolvedElement; |
| final PsiElement scope = aClass.getScope(); |
| if (!(scope instanceof PsiClass)) { |
| return; |
| } |
| if (aClass.hasModifierProperty(PsiModifier.STATIC)) { |
| return; |
| } |
| m_referencesStaticallyAccessible = false; |
| } |
| |
| @Override |
| public void visitReferenceExpression( |
| @NotNull PsiReferenceExpression expression) { |
| super.visitReferenceExpression(expression); |
| final PsiElement qualifier = expression.getQualifierExpression(); |
| if (qualifier != null && !(qualifier instanceof PsiThisExpression) && |
| !(qualifier instanceof PsiSuperExpression)) { |
| return; |
| } |
| final PsiElement element = expression.resolve(); |
| if (element instanceof PsiMember) { |
| final PsiMember member = (PsiMember)element; |
| if (isMemberStaticallyAccessible(member)) { |
| return; |
| } |
| } |
| else if (element != null) { |
| return; |
| } |
| m_referencesStaticallyAccessible = false; |
| } |
| |
| @Override |
| public void visitThisExpression( |
| @NotNull PsiThisExpression expression) { |
| super.visitThisExpression(expression); |
| m_referencesStaticallyAccessible = false; |
| } |
| |
| private boolean isMemberStaticallyAccessible(PsiMember member) { |
| if (m_method.equals(member)) { |
| return true; |
| } |
| if (member.hasModifierProperty(PsiModifier.STATIC)) { |
| return true; |
| } |
| final PsiClass referenceContainingClass = m_method.getContainingClass(); |
| final PsiClass containingClass = member.getContainingClass(); |
| return !InheritanceUtil.isInheritorOrSelf(referenceContainingClass, |
| containingClass, true); |
| } |
| } |