001/*
002 * Sonar, open source software quality management tool.
003 * Copyright (C) 2008-2012 SonarSource
004 * mailto:contact AT sonarsource DOT com
005 *
006 * Sonar is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * Sonar is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public
017 * License along with Sonar; if not, write to the Free Software
018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019 */
020package org.sonar.java.bytecode.visitor;
021
022import org.sonar.java.bytecode.asm.AsmClass;
023import org.sonar.squid.measures.Metric;
024
025public class DITVisitor extends BytecodeVisitor {
026
027  @Override
028  public void visitClass(AsmClass asmClass) {
029    int dit = calculateDepthOfInheritance(asmClass);
030
031    getSourceClass(asmClass).add(Metric.DIT, dit);
032
033    if (isMainPublicClassInFile(asmClass)) {
034      getSourceFile(asmClass).add(Metric.DIT, dit);
035    }
036  }
037
038  private int calculateDepthOfInheritance(AsmClass asmClass) {
039    int dit = 0;
040    AsmClass superClass = asmClass.getSuperClass();
041    while (superClass != null) {
042      dit++;
043      superClass = superClass.getSuperClass();
044    }
045    return dit;
046  }
047}