| /* |
| * 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.methodmetrics; |
| |
| import com.intellij.psi.*; |
| import org.jetbrains.annotations.NotNull; |
| |
| class ReturnPointCountVisitor extends JavaRecursiveElementVisitor { |
| |
| private int m_count = 0; |
| private final boolean ignoreGuardClauses; |
| private boolean previousWasGuardClause = true; |
| |
| public ReturnPointCountVisitor(boolean ignoreGuardClauses) { |
| this.ignoreGuardClauses = ignoreGuardClauses; |
| } |
| |
| @Override |
| public void visitAnonymousClass(@NotNull PsiAnonymousClass aClass) { |
| // no call to super, to keep it from drilling into anonymous classes |
| } |
| |
| @Override |
| public void visitReturnStatement(@NotNull PsiReturnStatement statement) { |
| super.visitReturnStatement(statement); |
| if (ignoreGuardClauses && previousWasGuardClause) { |
| return; |
| } |
| m_count++; |
| } |
| |
| @Override |
| public void visitStatement(PsiStatement statement) { |
| super.visitStatement(statement); |
| if (!previousWasGuardClause) { |
| return; |
| } |
| if (statement instanceof PsiDeclarationStatement) { |
| return; |
| } |
| final PsiElement parent = statement.getParent(); |
| if (!(parent instanceof PsiCodeBlock)) { |
| return; |
| } |
| final PsiElement grandParent = parent.getParent(); |
| if (!(grandParent instanceof PsiMethod)) { |
| return; |
| } |
| previousWasGuardClause = isGuardClause(statement); |
| } |
| |
| private static boolean isGuardClause(PsiStatement statement) { |
| if (!(statement instanceof PsiIfStatement)) { |
| return false; |
| } |
| final PsiIfStatement ifStatement = (PsiIfStatement)statement; |
| if (ifStatement.getElseBranch() != null) { |
| return false; |
| } |
| final PsiStatement thenBranch = ifStatement.getThenBranch(); |
| if (thenBranch instanceof PsiReturnStatement) { |
| return true; |
| } |
| if (!(thenBranch instanceof PsiBlockStatement)) { |
| return false; |
| } |
| final PsiBlockStatement blockStatement = (PsiBlockStatement)thenBranch; |
| final PsiCodeBlock codeBlock = blockStatement.getCodeBlock(); |
| final PsiStatement[] statements = codeBlock.getStatements(); |
| if (statements.length != 1) { |
| return false; |
| } |
| final PsiStatement containedStatement = statements[0]; |
| return containedStatement instanceof PsiReturnStatement; |
| } |
| |
| public int getCount() { |
| return m_count; |
| } |
| } |