| /* |
| * Copyright 2003-2012 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.style; |
| |
| import com.intellij.codeInspection.CleanupLocalInspectionTool; |
| import com.intellij.codeInspection.ProblemDescriptor; |
| import com.intellij.codeInspection.ProblemHighlightType; |
| import com.intellij.codeInspection.ui.SingleCheckboxOptionsPanel; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| 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.psiutils.ExpressionUtils; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import javax.swing.*; |
| |
| public class RedundantFieldInitializationInspection extends BaseInspection implements CleanupLocalInspectionTool { |
| |
| @SuppressWarnings("PublicField") |
| public boolean onlyWarnOnNull = false; |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message("redundant.field.initialization.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| protected String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message("redundant.field.initialization.problem.descriptor"); |
| } |
| |
| @Nullable |
| @Override |
| public JComponent createOptionsPanel() { |
| return new SingleCheckboxOptionsPanel("Only warn on initialization to null", this, "onlyWarnOnNull"); |
| } |
| |
| @Override |
| public InspectionGadgetsFix buildFix(Object... infos) { |
| return new RedundantFieldInitializationFix(); |
| } |
| |
| private static class RedundantFieldInitializationFix extends InspectionGadgetsFix { |
| |
| @Override |
| @NotNull |
| public String getName() { |
| return InspectionGadgetsBundle.message("redundant.field.initialization.remove.quickfix"); |
| } |
| |
| @NotNull |
| @Override |
| public String getFamilyName() { |
| return getName(); |
| } |
| |
| @Override |
| public void doFix(Project project, ProblemDescriptor descriptor) throws IncorrectOperationException { |
| descriptor.getPsiElement().delete(); |
| } |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new RedundantFieldInitializationVisitor(); |
| } |
| |
| private class RedundantFieldInitializationVisitor extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitField(@NotNull PsiField field) { |
| super.visitField(field); |
| if (!field.hasInitializer() || field.hasModifierProperty(PsiModifier.FINAL)) { |
| return; |
| } |
| final PsiExpression initializer = field.getInitializer(); |
| if (initializer == null) { |
| return; |
| } |
| final String text = initializer.getText(); |
| final PsiType type = field.getType(); |
| if (PsiType.BOOLEAN.equals(type)) { |
| if (onlyWarnOnNull || !PsiKeyword.FALSE.equals(text)) { |
| return; |
| } |
| } else if (type instanceof PsiPrimitiveType) { |
| if (onlyWarnOnNull || !ExpressionUtils.isZero(initializer)) { |
| return; |
| } |
| } else if (!PsiType.NULL.equals(initializer.getType())) { |
| return; |
| } |
| registerError(initializer, ProblemHighlightType.LIKE_UNUSED_SYMBOL); |
| } |
| } |
| } |