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 java.util.HashSet;
023import java.util.Set;
024
025import org.sonar.java.bytecode.asm.AsmClass;
026import org.sonar.java.bytecode.asm.AsmEdge;
027import org.sonar.java.bytecode.asm.AsmMethod;
028import org.sonar.squid.api.SourceCodeEdgeUsage;
029import org.sonar.squid.measures.Metric;
030
031public class RFCVisitor extends BytecodeVisitor {
032
033  private AsmClass asmClass;
034  private Set<AsmMethod> distinctCallToExternalMethods;
035  private int rfc = 0;
036
037  @Override
038  public void visitClass(AsmClass asmClass) {
039    rfc = 0;
040    this.asmClass = asmClass;
041    distinctCallToExternalMethods = new HashSet<AsmMethod>();
042  }
043
044  @Override
045  public void visitMethod(AsmMethod asmMethod) {
046    if (asmMethod.isBodyLoaded() && !asmMethod.isAccessor()) {
047      rfc++;
048    }
049  }
050
051  @Override
052  public void visitEdge(AsmEdge edge) {
053    if (edge.getTargetAsmClass() != asmClass && edge.getUsage() == SourceCodeEdgeUsage.CALLS_METHOD
054        && !((AsmMethod) edge.getTo()).isAccessor()) {
055      distinctCallToExternalMethods.add((AsmMethod) edge.getTo());
056    }
057  }
058
059  @Override
060  public void leaveClass(AsmClass asmClass) {
061    rfc += distinctCallToExternalMethods.size();
062    getSourceClass(asmClass).add(Metric.RFC, rfc);
063
064    if (isMainPublicClassInFile(asmClass)) {
065      getSourceFile(asmClass).add(Metric.RFC, rfc);
066    }
067  }
068}