| /* |
| * Copyright 2003-2013 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.controlflow; |
| |
| import com.intellij.psi.*; |
| import com.intellij.codeInspection.ui.SingleIntegerFieldOptionsPanel; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import com.siyeh.ig.psiutils.SwitchUtils; |
| import org.jetbrains.annotations.NotNull; |
| |
| import javax.swing.*; |
| |
| public class SwitchStatementDensityInspection extends BaseInspection { |
| |
| private static final int DEFAULT_DENSITY_LIMIT = 20; |
| |
| @SuppressWarnings("PublicField") |
| public int m_limit = DEFAULT_DENSITY_LIMIT; |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message("switch.statement.density.display.name"); |
| } |
| |
| @Override |
| public JComponent createOptionsPanel() { |
| return new SingleIntegerFieldOptionsPanel(InspectionGadgetsBundle.message("switch.statement.density.min.option"), this, "m_limit"); |
| } |
| |
| @Override |
| @NotNull |
| protected String buildErrorString(Object... infos) { |
| final Integer intDensity = (Integer)infos[0]; |
| return InspectionGadgetsBundle.message("switch.statement.density.problem.descriptor", intDensity); |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new SwitchStatementDensityVisitor(); |
| } |
| |
| private class SwitchStatementDensityVisitor extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitSwitchStatement(@NotNull PsiSwitchStatement statement) { |
| final PsiCodeBlock body = statement.getBody(); |
| if (body == null) { |
| return; |
| } |
| final int branchCount = SwitchUtils.calculateBranchCount(statement); |
| if (branchCount == 0) { |
| return; |
| } |
| final double density = calculateDensity(body, branchCount); |
| final int intDensity = (int)(density * 100.0); |
| if (intDensity > m_limit) { |
| return; |
| } |
| registerStatementError(statement, Integer.valueOf(intDensity)); |
| } |
| |
| private double calculateDensity(@NotNull PsiCodeBlock body, int branchCount) { |
| final StatementCountVisitor visitor = new StatementCountVisitor(); |
| body.accept(visitor); |
| return (double)branchCount / (double)visitor.getStatementCount(); |
| } |
| } |
| |
| private static class StatementCountVisitor extends JavaRecursiveElementVisitor { |
| |
| private int statementCount = 0; |
| |
| @Override |
| public void visitStatement(@NotNull PsiStatement statement) { |
| super.visitStatement(statement); |
| if (statement instanceof PsiSwitchLabelStatement || statement instanceof PsiBreakStatement) { |
| return; |
| } |
| statementCount++; |
| } |
| |
| public int getStatementCount() { |
| return statementCount; |
| } |
| } |
| } |