| /* |
| * Copyright 2005-2011 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.migration; |
| |
| import com.intellij.codeInspection.ProblemDescriptor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.psi.tree.IElementType; |
| import com.intellij.psi.util.PsiUtil; |
| import com.intellij.util.IncorrectOperationException; |
| import com.siyeh.HardcodedMethodConstants; |
| 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 com.siyeh.ig.psiutils.ComparisonUtils; |
| import com.siyeh.ig.psiutils.ExpressionUtils; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| public class IndexOfReplaceableByContainsInspection |
| extends BaseInspection { |
| |
| @Override |
| public boolean isEnabledByDefault() { |
| return true; |
| } |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message( |
| "indexof.replaceable.by.contains.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| public String buildErrorString(Object... infos) { |
| final PsiBinaryExpression expression = (PsiBinaryExpression)infos[0]; |
| final PsiExpression lhs = expression.getLOperand(); |
| final String text; |
| if (lhs instanceof PsiMethodCallExpression) { |
| final PsiMethodCallExpression callExpression = |
| (PsiMethodCallExpression)lhs; |
| text = createContainsExpressionText(callExpression, false, |
| expression.getOperationTokenType()); |
| } |
| else { |
| final PsiMethodCallExpression callExpression = |
| (PsiMethodCallExpression)expression.getROperand(); |
| assert callExpression != null; |
| text = createContainsExpressionText(callExpression, true, |
| expression.getOperationTokenType()); |
| } |
| return InspectionGadgetsBundle.message( |
| "expression.can.be.replaced.problem.descriptor", text); |
| } |
| |
| @Override |
| @Nullable |
| protected InspectionGadgetsFix buildFix(Object... infos) { |
| return new IndexOfReplaceableByContainsFix(); |
| } |
| |
| private static class IndexOfReplaceableByContainsFix |
| extends InspectionGadgetsFix { |
| |
| @Override |
| protected void doFix(Project project, ProblemDescriptor descriptor) |
| throws IncorrectOperationException { |
| final PsiElement element = descriptor.getPsiElement(); |
| if (!(element instanceof PsiBinaryExpression)) { |
| return; |
| } |
| final PsiBinaryExpression expression = |
| (PsiBinaryExpression)element; |
| final PsiExpression lhs = expression.getLOperand(); |
| final PsiExpression rhs = expression.getROperand(); |
| final String newExpressionText; |
| if (lhs instanceof PsiMethodCallExpression) { |
| final PsiMethodCallExpression callExpression = |
| (PsiMethodCallExpression)lhs; |
| newExpressionText = |
| createContainsExpressionText(callExpression, false, |
| expression.getOperationTokenType()); |
| } |
| else if (rhs instanceof PsiMethodCallExpression) { |
| final PsiMethodCallExpression callExpression = |
| (PsiMethodCallExpression)rhs; |
| newExpressionText = |
| createContainsExpressionText(callExpression, true, |
| expression.getOperationTokenType()); |
| } |
| else { |
| return; |
| } |
| PsiReplacementUtil.replaceExpression(expression, newExpressionText); |
| } |
| |
| @Override |
| @NotNull |
| public String getName() { |
| return InspectionGadgetsBundle.message( |
| "replace.indexof.with.contains.quickfix"); |
| } |
| |
| @Override |
| @NotNull |
| public String getFamilyName() { |
| return getName(); |
| } |
| |
| } |
| |
| static String createContainsExpressionText( |
| @NotNull PsiMethodCallExpression call, |
| boolean flipped, IElementType tokenType) { |
| final PsiReferenceExpression methodExpression = |
| call.getMethodExpression(); |
| final PsiExpression qualifierExpression = |
| methodExpression.getQualifierExpression(); |
| final String qualifierText; |
| if (qualifierExpression == null) { |
| qualifierText = ""; |
| } |
| else { |
| qualifierText = qualifierExpression.getText(); |
| } |
| final PsiExpressionList argumentList = call.getArgumentList(); |
| final PsiExpression expression = argumentList.getExpressions()[0]; |
| @NonNls final String newExpressionText = |
| qualifierText + ".contains(" + expression.getText() + ')'; |
| if (tokenType.equals(JavaTokenType.EQEQ)) { |
| return '!' + newExpressionText; |
| } |
| else if (!flipped && (tokenType.equals(JavaTokenType.LT) || |
| tokenType.equals(JavaTokenType.LE))) { |
| return '!' + newExpressionText; |
| } |
| else if (flipped && (tokenType.equals(JavaTokenType.GT) || |
| tokenType.equals(JavaTokenType.GE))) { |
| return '!' + newExpressionText; |
| } |
| return newExpressionText; |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new IndexOfReplaceableByContainsVisitor(); |
| } |
| |
| private static class IndexOfReplaceableByContainsVisitor |
| extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitBinaryExpression( |
| PsiBinaryExpression expression) { |
| if (!PsiUtil.isLanguageLevel5OrHigher(expression)) { |
| return; |
| } |
| super.visitBinaryExpression(expression); |
| final PsiExpression rhs = expression.getROperand(); |
| if (rhs == null) { |
| return; |
| } |
| if (!ComparisonUtils.isComparison(expression)) { |
| return; |
| } |
| final PsiExpression lhs = expression.getLOperand(); |
| if (lhs instanceof PsiMethodCallExpression) { |
| if (canBeReplacedByContains(lhs, rhs, false, |
| expression.getOperationTokenType())) { |
| registerError(expression, expression); |
| } |
| } |
| else if (rhs instanceof PsiMethodCallExpression) { |
| if (canBeReplacedByContains(rhs, lhs, true, |
| expression.getOperationTokenType())) { |
| registerError(expression, expression); |
| } |
| } |
| } |
| |
| private static boolean canBeReplacedByContains( |
| PsiExpression lhs, |
| PsiExpression rhs, boolean flipped, IElementType tokenType) { |
| final PsiMethodCallExpression callExpression = |
| (PsiMethodCallExpression)lhs; |
| if (!isIndexOfCall(callExpression)) { |
| return false; |
| } |
| final Object object = |
| ExpressionUtils.computeConstantExpression(rhs); |
| if (!(object instanceof Integer)) { |
| return false; |
| } |
| final Integer integer = (Integer)object; |
| final int constant = integer.intValue(); |
| if (flipped) { |
| if (constant == -1 && (JavaTokenType.NE.equals(tokenType) || |
| JavaTokenType.LT.equals(tokenType) || |
| JavaTokenType.EQEQ.equals(tokenType) || |
| JavaTokenType.GE.equals(tokenType))) { |
| return true; |
| } |
| else if (constant == 0 && |
| (JavaTokenType.LE.equals(tokenType) || |
| JavaTokenType.GT.equals(tokenType))) { |
| return true; |
| } |
| } |
| else { |
| if (constant == -1 && (JavaTokenType.NE.equals(tokenType) || |
| JavaTokenType.GT.equals(tokenType) || |
| JavaTokenType.EQEQ.equals(tokenType) || |
| JavaTokenType.LE.equals(tokenType))) { |
| return true; |
| } |
| else if (constant == 0 && |
| (JavaTokenType.GE.equals(tokenType) || |
| JavaTokenType.LT.equals(tokenType))) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private static boolean isIndexOfCall( |
| @NotNull PsiMethodCallExpression expression) { |
| final PsiReferenceExpression methodExpression = |
| expression.getMethodExpression(); |
| final String methodName = methodExpression.getReferenceName(); |
| if (!HardcodedMethodConstants.INDEX_OF.equals(methodName)) { |
| return false; |
| } |
| final PsiExpressionList argumentList = expression.getArgumentList(); |
| final PsiExpression[] arguments = argumentList.getExpressions(); |
| if (arguments.length != 1) { |
| return false; |
| } |
| final PsiType argumentType = arguments[0].getType(); |
| if (argumentType == null || |
| !argumentType.equalsToText( |
| CommonClassNames.JAVA_LANG_STRING)) { |
| return false; |
| } |
| final PsiExpression qualifier = |
| methodExpression.getQualifierExpression(); |
| if (qualifier == null) { |
| return false; |
| } |
| final PsiType qualifierType = qualifier.getType(); |
| return qualifierType != null && |
| qualifierType.equalsToText(CommonClassNames.JAVA_LANG_STRING); |
| } |
| } |
| } |