| /* |
| * Copyright 2011-2012 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.bugs; |
| |
| import com.intellij.codeInspection.ProblemDescriptor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.psi.tree.IElementType; |
| 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.Nls; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class MathRandomCastToIntInspection extends BaseInspection { |
| @Nls |
| @NotNull |
| @Override |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message("math.random.cast.to.int.display.name"); |
| } |
| |
| @NotNull |
| @Override |
| protected String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message("math.random.cast.to.int.problem.descriptor"); |
| } |
| |
| @Override |
| public boolean isEnabledByDefault() { |
| return true; |
| } |
| |
| @Override |
| protected InspectionGadgetsFix buildFix(Object... infos) { |
| final PsiTypeCastExpression expression = (PsiTypeCastExpression)infos[0]; |
| final PsiElement parent = expression.getParent(); |
| if (!(parent instanceof PsiPolyadicExpression)) { |
| return null; |
| } |
| final PsiPolyadicExpression polyadicExpression = (PsiPolyadicExpression)parent; |
| final IElementType tokenType = polyadicExpression.getOperationTokenType(); |
| if (JavaTokenType.ASTERISK != tokenType) { |
| return null; |
| } |
| return new MathRandomCastToIntegerFix(); |
| } |
| |
| private static class MathRandomCastToIntegerFix extends InspectionGadgetsFix { |
| @Override |
| @NotNull |
| public String getFamilyName() { |
| return getName(); |
| } |
| @Override |
| @NotNull |
| public String getName() { |
| return InspectionGadgetsBundle.message( |
| "math.random.cast.to.int.quickfix"); |
| } |
| |
| @Override |
| protected void doFix(Project project, ProblemDescriptor descriptor) throws IncorrectOperationException { |
| final PsiElement element = descriptor.getPsiElement(); |
| final PsiElement parent = element.getParent(); |
| if (!(parent instanceof PsiTypeCastExpression)) { |
| return; |
| } |
| final PsiTypeCastExpression typeCastExpression = (PsiTypeCastExpression)parent; |
| final PsiElement grandParent = typeCastExpression.getParent(); |
| if (!(grandParent instanceof PsiPolyadicExpression)) { |
| return; |
| } |
| final PsiPolyadicExpression polyadicExpression = (PsiPolyadicExpression)grandParent; |
| final PsiExpression operand = typeCastExpression.getOperand(); |
| if (operand == null) { |
| return; |
| } |
| @NonNls final StringBuilder newExpression = new StringBuilder(); |
| newExpression.append("(int)("); |
| final PsiExpression[] operands = polyadicExpression.getOperands(); |
| for (final PsiExpression expression : operands) { |
| final PsiJavaToken token = polyadicExpression.getTokenBeforeOperand(expression); |
| if (token != null) { |
| newExpression.append(token.getText()); |
| } |
| if (typeCastExpression.equals(expression)) { |
| newExpression.append(operand.getText()); |
| } |
| else { |
| newExpression.append(expression.getText()); |
| } |
| } |
| newExpression.append(')'); |
| PsiReplacementUtil.replaceExpression(polyadicExpression, newExpression.toString()); |
| } |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new MathRandomCastToIntegerVisitor(); |
| } |
| |
| private static class MathRandomCastToIntegerVisitor extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitTypeCastExpression(PsiTypeCastExpression expression) { |
| super.visitTypeCastExpression(expression); |
| final PsiExpression operand = expression.getOperand(); |
| if (!(operand instanceof PsiMethodCallExpression)) { |
| return; |
| } |
| final PsiTypeElement castType = expression.getCastType(); |
| if (castType == null) { |
| return; |
| } |
| final PsiType type = castType.getType(); |
| if (!PsiType.INT.equals(type) && !PsiType.LONG.equals(type)) { |
| return; |
| } |
| final PsiMethodCallExpression methodCallExpression = (PsiMethodCallExpression)operand; |
| final PsiReferenceExpression methodExpression = methodCallExpression.getMethodExpression(); |
| @NonNls |
| final String referenceName = methodExpression.getReferenceName(); |
| if (!"random".equals(referenceName)) { |
| return; |
| } |
| final PsiMethod method = methodCallExpression.resolveMethod(); |
| if (method == null) { |
| return; |
| } |
| final PsiClass containingClass = method.getContainingClass(); |
| if (containingClass == null) { |
| return; |
| } |
| final String qualifiedName = containingClass.getQualifiedName(); |
| if (!"java.lang.Math".equals(qualifiedName) && !"java.lang.StrictMath".equals(qualifiedName)) { |
| return; |
| } |
| registerError(methodCallExpression, expression); |
| } |
| } |
| } |