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.duplications.index;
021    
022    import org.sonar.duplications.CodeFragment;
023    
024    public class ClonePart implements CodeFragment {
025    
026      private final String resourceId;
027      private final int startUnit;
028      private final int startLine;
029      private final int endLine;
030    
031      /**
032       * Cache for hash code.
033       */
034      private int hash;
035    
036      public ClonePart(String resourceId, int startUnit, int startLine, int endLine) {
037        this.resourceId = resourceId;
038        this.startUnit = startUnit;
039        this.startLine = startLine;
040        this.endLine = endLine;
041      }
042    
043      public String getResourceId() {
044        return resourceId;
045      }
046    
047      public int getUnitStart() {
048        return startUnit;
049      }
050    
051      public int getStartLine() {
052        return startLine;
053      }
054    
055      public int getEndLine() {
056        return endLine;
057      }
058    
059      public int getLines() {
060        return endLine - startLine + 1;
061      }
062    
063      @Override
064      public boolean equals(Object obj) {
065        if (obj instanceof ClonePart) {
066          ClonePart another = (ClonePart) obj;
067          return another.resourceId.equals(resourceId)
068            && another.startLine == startLine
069            && another.endLine == endLine
070            && another.startUnit == startUnit;
071        }
072        return false;
073      }
074    
075      @Override
076      public int hashCode() {
077        int h = hash;
078        if (h == 0) {
079          h = resourceId.hashCode();
080          h = 31 * h + startLine;
081          h = 31 * h + endLine;
082          h = 31 * h + startUnit;
083          hash = h;
084        }
085        return h;
086      }
087    
088      @Override
089      public String toString() {
090        return "'" + resourceId + "':[" + startUnit + "|" + startLine + "-" + endLine + "]";
091      }
092    
093    }