| /* |
| * Copyright 2003-2007 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.codeInspection.ui.SingleIntegerFieldOptionsPanel; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiIfStatement; |
| import com.intellij.psi.PsiStatement; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import org.jetbrains.annotations.NotNull; |
| |
| import javax.swing.*; |
| |
| public class IfStatementWithTooManyBranchesInspection |
| extends BaseInspection { |
| |
| private static final int DEFAULT_BRANCH_LIMIT = 3; |
| |
| /** |
| * this is public for the DefaultJDOMExternalizer thingy |
| * |
| * @noinspection PublicField |
| */ |
| public int m_limit = DEFAULT_BRANCH_LIMIT; |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message( |
| "if.statement.with.too.many.branches.display.name"); |
| } |
| |
| @Override |
| public JComponent createOptionsPanel() { |
| return new SingleIntegerFieldOptionsPanel( |
| InspectionGadgetsBundle.message( |
| "if.statement.with.too.many.branches.max.option"), |
| this, "m_limit"); |
| } |
| |
| @Override |
| @NotNull |
| protected String buildErrorString(Object... infos) { |
| final Integer branchCount = (Integer)infos[0]; |
| return InspectionGadgetsBundle.message( |
| "if.statement.with.too.many.branches.problem.descriptor", |
| branchCount); |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new IfStatementWithTooManyBranchesVisitor(); |
| } |
| |
| private class IfStatementWithTooManyBranchesVisitor |
| extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitIfStatement(@NotNull PsiIfStatement statement) { |
| super.visitIfStatement(statement); |
| final PsiElement parent = statement.getParent(); |
| if (parent instanceof PsiIfStatement) { |
| final PsiIfStatement parentStatement = (PsiIfStatement)parent; |
| final PsiStatement elseBranch = parentStatement.getElseBranch(); |
| if (statement.equals(elseBranch)) { |
| return; |
| } |
| } |
| final int branchCount = calculateBranchCount(statement); |
| if (branchCount <= m_limit) { |
| return; |
| } |
| registerStatementError(statement, Integer.valueOf(branchCount)); |
| } |
| |
| private int calculateBranchCount(PsiIfStatement statement) { |
| final PsiStatement branch = statement.getElseBranch(); |
| if (branch == null) { |
| return 1; |
| } |
| if (!(branch instanceof PsiIfStatement)) { |
| return 2; |
| } |
| return 1 + calculateBranchCount((PsiIfStatement)branch); |
| } |
| } |
| } |