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     */
020    package org.sonar.java.bytecode.visitor;
021    
022    import org.sonar.java.bytecode.asm.AsmClass;
023    import org.sonar.squid.measures.Metric;
024    
025    public class DITVisitor extends BytecodeVisitor {
026    
027      public void visitClass(AsmClass asmClass) {
028        int dit = calculateDepthOfInheritance(asmClass);
029    
030        getSourceClass(asmClass).add(Metric.DIT, dit);
031    
032        if (isMainPublicClassInFile(asmClass)) {
033          getSourceFile(asmClass).add(Metric.DIT, dit);
034        }
035      }
036    
037      private int calculateDepthOfInheritance(AsmClass asmClass) {
038        int dit = 0;
039        AsmClass superClass = asmClass.getSuperClass();
040        while (superClass != null) {
041          dit++;
042          superClass = superClass.getSuperClass();
043        }
044        return dit;
045      }
046    }