001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2009 SonarSource SA
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.indexer.SquidIndex;
024    import org.sonar.squid.measures.Metric;
025    
026    public class DITVisitor extends BytecodeVisitor {
027    
028      public DITVisitor(SquidIndex index) {
029        super(index);
030      }
031    
032      public void visitClass(AsmClass asmClass) {
033        int dit = calculateDepthOfInheritance(asmClass);
034    
035        getSourceClass(asmClass).add(Metric.DIT, dit);
036    
037        if (isMainPublicClassInFile(asmClass)) {
038          getSourceFile(asmClass).add(Metric.DIT, dit);
039        }
040      }
041    
042      private int calculateDepthOfInheritance(AsmClass asmClass) {
043        int dit = 0;
044        AsmClass superClass = asmClass.getSuperClass();
045        while (superClass != null) {
046          dit++;
047          superClass = superClass.getSuperClass();
048        }
049        return dit;
050      }
051    }