001    /*
002     * SonarQube, open source software quality management tool.
003     * Copyright (C) 2008-2014 SonarSource
004     * mailto:contact AT sonarsource DOT com
005     *
006     * SonarQube 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     * SonarQube 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 License
017     * along with this program; if not, write to the Free Software Foundation,
018     * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
019     */
020    package org.sonar.graph;
021    
022    import org.apache.commons.lang.math.NumberUtils;
023    
024    public class FeedbackEdge implements Comparable<FeedbackEdge> {
025    
026      private Edge edge;
027      private double relativeWeight;
028      private int occurences;
029      private final int hashcode;
030    
031      public FeedbackEdge(Edge edge, int occurences) {
032        this.edge = edge;
033        this.hashcode = edge.hashCode();
034        this.occurences = occurences;
035        this.relativeWeight = (double) edge.getWeight() / occurences;
036      }
037    
038      protected Edge getEdge() {
039        return edge;
040      }
041    
042      protected int getWeight() {
043        return edge.getWeight();
044      }
045    
046      protected double getRelativeWeight() {
047        return relativeWeight;
048      }
049    
050      protected int getOccurences() {
051        return occurences;
052      }
053    
054      public int compareTo(FeedbackEdge feedbackEdge) {
055        if (this.getRelativeWeight() < feedbackEdge.getRelativeWeight()) {
056          return -1;
057        }
058        if (NumberUtils.compare(this.getRelativeWeight(), feedbackEdge.getRelativeWeight())==0) {
059          return this.getEdge().getFrom().toString().compareTo(feedbackEdge.getEdge().getFrom().toString());
060        }
061        return 1;
062      }
063    
064      @Override
065      public boolean equals(Object obj) {
066        if (!(obj instanceof FeedbackEdge) || this.hashCode() != obj.hashCode()) {
067          return false;
068        }
069        FeedbackEdge otherEdge = (FeedbackEdge) obj;
070        return edge.equals(otherEdge.edge);
071      }
072    
073      @Override
074      public int hashCode() {
075        return hashcode;
076      }
077    }