| /* |
| * Copyright 2003-2007 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.assignment; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.tree.IElementType; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import com.siyeh.ig.psiutils.WellFormednessUtils; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class AssignmentToStaticFieldFromInstanceMethodInspection |
| extends BaseInspection { |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message( |
| "assignment.to.static.field.from.instance.method.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| public String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message( |
| "assignment.to.static.field.from.instance.method.problem.descriptor"); |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new AssignmentToStaticFieldFromInstanceMethod(); |
| } |
| |
| private static class AssignmentToStaticFieldFromInstanceMethod |
| extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitAssignmentExpression( |
| @NotNull PsiAssignmentExpression expression) { |
| if (!WellFormednessUtils.isWellFormed(expression)) { |
| return; |
| } |
| final PsiExpression lhs = expression.getLExpression(); |
| checkForStaticFieldAccess(lhs); |
| } |
| |
| @Override |
| public void visitPrefixExpression( |
| @NotNull PsiPrefixExpression expression) { |
| final IElementType tokenType = expression.getOperationTokenType(); |
| if (!tokenType.equals(JavaTokenType.PLUSPLUS) && |
| !tokenType.equals(JavaTokenType.MINUSMINUS)) { |
| return; |
| } |
| final PsiExpression operand = expression.getOperand(); |
| if (operand == null) { |
| return; |
| } |
| checkForStaticFieldAccess(operand); |
| } |
| |
| @Override |
| public void visitPostfixExpression( |
| @NotNull PsiPostfixExpression expression) { |
| final IElementType tokenType = expression.getOperationTokenType(); |
| if (!tokenType.equals(JavaTokenType.PLUSPLUS) && |
| !tokenType.equals(JavaTokenType.MINUSMINUS)) { |
| return; |
| } |
| final PsiExpression operand = expression.getOperand(); |
| checkForStaticFieldAccess(operand); |
| } |
| |
| private void checkForStaticFieldAccess(PsiExpression expression) { |
| if (!(expression instanceof PsiReferenceExpression)) { |
| return; |
| } |
| if (isInStaticMethod(expression)) { |
| return; |
| } |
| final PsiElement referent = ((PsiReference)expression).resolve(); |
| if (referent == null) { |
| return; |
| } |
| if (!(referent instanceof PsiField)) { |
| return; |
| } |
| final PsiField fieldReferenced = (PsiField)referent; |
| if (fieldReferenced.hasModifierProperty(PsiModifier.STATIC)) { |
| registerError(expression); |
| } |
| } |
| |
| private static boolean isInStaticMethod(PsiElement element) { |
| final PsiMember member = |
| PsiTreeUtil.getParentOfType(element, |
| PsiMethod.class, PsiClassInitializer.class); |
| if (member == null) { |
| return false; |
| } |
| return member.hasModifierProperty(PsiModifier.STATIC); |
| } |
| } |
| } |