| /* |
| * Copyright 2007-2008 Dave Griffith |
| * |
| * 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 org.jetbrains.plugins.groovy.codeInspection.threading; |
| |
| import com.intellij.psi.PsiClass; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiField; |
| import com.intellij.psi.PsiModifier; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import org.jetbrains.annotations.Nls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.plugins.groovy.codeInspection.BaseInspection; |
| import org.jetbrains.plugins.groovy.codeInspection.BaseInspectionVisitor; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrSynchronizedStatement; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrReferenceExpression; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.members.GrMethod; |
| import org.jetbrains.plugins.groovy.lang.psi.util.PsiUtil; |
| |
| public class GroovyAccessToStaticFieldLockedOnInstanceInspection |
| extends BaseInspection { |
| @Override |
| public boolean isEnabledByDefault() { |
| return true; |
| } |
| |
| @Override |
| @Nls |
| @NotNull |
| public String getGroupDisplayName() { |
| return THREADING_ISSUES; |
| } |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return "Access to static field locked on instance data"; |
| } |
| |
| @Override |
| @NotNull |
| protected String buildErrorString(Object... infos) { |
| return "Access to static field <code>#ref</code> locked on instance data #loc"; |
| } |
| |
| @NotNull |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new Visitor(); |
| } |
| |
| private static class Visitor |
| extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitReferenceExpression( |
| @NotNull GrReferenceExpression expression) { |
| super.visitReferenceExpression(expression); |
| boolean isLockedOnInstance = false; |
| boolean isLockedOnClass = false; |
| final GrMethod containingMethod = |
| PsiTreeUtil.getParentOfType(expression, GrMethod.class); |
| if (containingMethod != null && |
| containingMethod.hasModifierProperty( |
| PsiModifier.SYNCHRONIZED)) { |
| if (containingMethod.hasModifierProperty( |
| PsiModifier.STATIC)) { |
| isLockedOnClass = true; |
| } else { |
| isLockedOnInstance = true; |
| } |
| } |
| PsiElement elementToCheck = expression; |
| while (true) { |
| final GrSynchronizedStatement syncStatement = PsiTreeUtil.getParentOfType(elementToCheck, GrSynchronizedStatement.class); |
| if (syncStatement == null) { |
| break; |
| } |
| final GrExpression lockExpression = syncStatement.getMonitor(); |
| |
| if (lockExpression instanceof GrReferenceExpression && PsiUtil.isThisReference(lockExpression)) { |
| isLockedOnInstance = true; |
| } |
| else if (lockExpression instanceof GrReferenceExpression) { |
| final GrReferenceExpression reference = (GrReferenceExpression) lockExpression; |
| final PsiElement referent = reference.resolve(); |
| if (referent instanceof PsiField) { |
| final PsiField referentField = (PsiField) referent; |
| if (referentField.hasModifierProperty(PsiModifier.STATIC)) { |
| isLockedOnClass = true; |
| } else { |
| isLockedOnInstance = true; |
| } |
| } |
| } |
| elementToCheck = syncStatement; |
| } |
| if (!isLockedOnInstance || isLockedOnClass) { |
| return; |
| } |
| final PsiElement referent = expression.resolve(); |
| if (!(referent instanceof PsiField)) { |
| return; |
| } |
| final PsiField referredField = (PsiField) referent; |
| if (!referredField.hasModifierProperty(PsiModifier.STATIC) || |
| isConstant(referredField)) { |
| return; |
| } |
| final PsiClass containingClass = referredField.getContainingClass(); |
| if (!PsiTreeUtil.isAncestor(containingClass, expression, false)) { |
| return; |
| } |
| registerError(expression); |
| } |
| |
| private static boolean isConstant(PsiField field) { |
| return field.hasModifierProperty(PsiModifier.FINAL); |
| } |
| } |
| } |