| /* |
| * Copyright 2006-2010 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.codeInspection.ProblemDescriptor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.psi.util.PsiUtil; |
| import com.intellij.util.IncorrectOperationException; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import com.siyeh.ig.InspectionGadgetsFix; |
| import com.siyeh.ig.PsiReplacementUtil; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class ConstantStringInternInspection extends BaseInspection { |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message( |
| "constant.string.intern.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| protected String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message( |
| "constant.string.intern.problem.descriptor"); |
| } |
| |
| @Override |
| public InspectionGadgetsFix buildFix(Object... infos) { |
| return new ConstantStringInternFix(); |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new ConstantStringInternVisitor(); |
| } |
| |
| private static class ConstantStringInternFix extends InspectionGadgetsFix { |
| @Override |
| @NotNull |
| public String getFamilyName() { |
| return getName(); |
| } |
| |
| @Override |
| @NotNull |
| public String getName() { |
| return InspectionGadgetsBundle.message( |
| "constant.string.intern.quickfix"); |
| } |
| |
| @Override |
| public void doFix(Project project, ProblemDescriptor descriptor) |
| throws IncorrectOperationException { |
| final PsiElement element = descriptor.getPsiElement(); |
| final PsiElement parent = element.getParent(); |
| final PsiMethodCallExpression call = |
| (PsiMethodCallExpression)parent.getParent(); |
| final PsiReferenceExpression expression = |
| call.getMethodExpression(); |
| final PsiExpression qualifier = expression.getQualifierExpression(); |
| if (qualifier == null) { |
| return; |
| } |
| final String qualifierText = qualifier.getText(); |
| PsiReplacementUtil.replaceExpression(call, qualifierText); |
| } |
| } |
| |
| private static class ConstantStringInternVisitor |
| extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitMethodCallExpression( |
| @NotNull PsiMethodCallExpression expression) { |
| super.visitMethodCallExpression(expression); |
| final PsiReferenceExpression methodExpression = |
| expression.getMethodExpression(); |
| @NonNls final String methodName = |
| methodExpression.getReferenceName(); |
| if (!"intern".equals(methodName)) { |
| return; |
| } |
| final PsiExpressionList argList = expression.getArgumentList(); |
| final PsiExpression[] args = argList.getExpressions(); |
| if (args.length != 0) { |
| return; |
| } |
| final PsiExpression qualifier = |
| methodExpression.getQualifierExpression(); |
| if (qualifier == null) { |
| return; |
| } |
| if (!PsiUtil.isConstantExpression(qualifier)) { |
| return; |
| } |
| final PsiMethod method = expression.resolveMethod(); |
| if (method == null) { |
| return; |
| } |
| final PsiClass aClass = method.getContainingClass(); |
| if (aClass == null) { |
| return; |
| } |
| final String className = aClass.getQualifiedName(); |
| if (!CommonClassNames.JAVA_LANG_STRING.equals(className)) { |
| return; |
| } |
| registerMethodCallError(expression); |
| } |
| } |
| } |