| /* |
| * Copyright 2007-2012 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.performance; |
| |
| import com.intellij.codeInspection.ProblemDescriptor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.util.IncorrectOperationException; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.InspectionGadgetsFix; |
| import com.siyeh.ig.PsiReplacementUtil; |
| import com.siyeh.ig.psiutils.HighlightUtils; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| public class ToArrayCallWithZeroLengthArrayArgumentInspection extends ToArrayCallWithZeroLengthArrayArgumentInspectionBase { |
| |
| @Override |
| @Nullable |
| protected InspectionGadgetsFix buildFix(Object... infos) { |
| return new ToArrayCallWithZeroLengthArrayArgumentFix(); |
| } |
| |
| private static class ToArrayCallWithZeroLengthArrayArgumentFix extends InspectionGadgetsFix { |
| |
| @NotNull |
| @Override |
| public String getFamilyName() { |
| return getName(); |
| } |
| |
| @Override |
| @NotNull |
| public String getName() { |
| return InspectionGadgetsBundle.message("to.array.call.with.zero.length.array.argument.quickfix"); |
| } |
| |
| @Override |
| protected void doFix(Project project, ProblemDescriptor descriptor) throws IncorrectOperationException { |
| final PsiElement element = descriptor.getPsiElement(); |
| final PsiElement parent = element.getParent(); |
| final PsiElement grandParent = parent.getParent(); |
| if (!(grandParent instanceof PsiMethodCallExpression)) { |
| return; |
| } |
| final PsiMethodCallExpression methodCallExpression = (PsiMethodCallExpression)grandParent; |
| final PsiReferenceExpression methodExpression = methodCallExpression.getMethodExpression(); |
| final PsiExpression qualifier = methodExpression.getQualifierExpression(); |
| final PsiElementFactory factory = JavaPsiFacade.getElementFactory(project); |
| final PsiExpressionList argumentList = methodCallExpression.getArgumentList(); |
| final PsiExpression[] arguments = argumentList.getExpressions(); |
| if (arguments.length != 1) { |
| return; |
| } |
| final PsiExpression argument = arguments[0]; |
| if (qualifier == null) { |
| return; |
| } |
| final String collectionText = qualifier.getText(); |
| final PsiType type = argument.getType(); |
| if (type == null) { |
| return; |
| } |
| final PsiType componentType = type.getDeepComponentType(); |
| final String typeText = componentType.getCanonicalText(); |
| if (!(qualifier instanceof PsiMethodCallExpression)) { |
| @NonNls final String replacementText = "new " + typeText + '[' + collectionText + ".size()]"; |
| final String newExpressionText = getElementText(methodCallExpression, argument, replacementText); |
| if (newExpressionText == null) { |
| return; |
| } |
| PsiReplacementUtil.replaceExpression(methodCallExpression, newExpressionText); |
| return; |
| } |
| // need to introduce a variable to prevent calling a method twice |
| PsiStatement statement = PsiTreeUtil.getParentOfType(methodCallExpression, PsiStatement.class); |
| if (statement == null) { |
| return; |
| } |
| final PsiType qualifierType = qualifier.getType(); |
| if (qualifierType == null) { |
| return; |
| } |
| PsiDeclarationStatement declarationStatement = factory.createVariableDeclarationStatement("var", qualifierType, qualifier); |
| PsiElement statementParent = statement.getParent(); |
| while (statementParent instanceof PsiLoopStatement || statementParent instanceof PsiIfStatement) { |
| statement = (PsiStatement) statementParent; |
| statementParent = statement.getParent(); |
| } |
| final String toArrayText = "var.toArray(new " + typeText + "[var.size()])"; |
| PsiMethodCallExpression newMethodCallExpression = |
| (PsiMethodCallExpression)factory.createExpressionFromText(toArrayText, methodCallExpression); |
| declarationStatement = (PsiDeclarationStatement)statementParent.addBefore(declarationStatement, statement); |
| newMethodCallExpression = (PsiMethodCallExpression)methodCallExpression.replace(newMethodCallExpression); |
| showRenameTemplate(declarationStatement, newMethodCallExpression, statementParent); |
| } |
| |
| private void showRenameTemplate(PsiDeclarationStatement declarationStatement, PsiMethodCallExpression methodCallExpression, |
| PsiElement context) { |
| if (!isOnTheFly()) { |
| return; |
| } |
| final PsiVariable variable = (PsiVariable)declarationStatement.getDeclaredElements()[0]; |
| final PsiReferenceExpression ref1 = (PsiReferenceExpression)methodCallExpression.getMethodExpression().getQualifierExpression(); |
| final PsiNewExpression argument = (PsiNewExpression)methodCallExpression.getArgumentList().getExpressions()[0]; |
| final PsiMethodCallExpression sizeExpression = (PsiMethodCallExpression)argument.getArrayDimensions()[0]; |
| final PsiReferenceExpression ref2 = (PsiReferenceExpression)sizeExpression.getMethodExpression().getQualifierExpression(); |
| HighlightUtils.showRenameTemplate(context, variable, ref1, ref2); |
| } |
| } |
| } |