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.statement;
021    
022    import org.sonar.duplications.CodeFragment;
023    import org.sonar.duplications.token.Token;
024    
025    import java.util.List;
026    
027    public class Statement implements CodeFragment {
028    
029      private final int startLine;
030      private final int endLine;
031      private final String value;
032    
033      /**
034       * Cache for hash code.
035       */
036      private int hash;
037    
038      public Statement(int startLine, int endLine, String value) {
039        this.startLine = startLine;
040        this.endLine = endLine;
041        this.value = value;
042      }
043    
044      public Statement(List<Token> tokens) {
045        if (tokens == null || tokens.isEmpty()) {
046          throw new IllegalArgumentException("A statement can't be initialized with an empty list of tokens");
047        }
048        StringBuilder sb = new StringBuilder();
049        for (Token token : tokens) {
050          sb.append(token.getValue());
051        }
052        this.value = sb.toString();
053        this.startLine = tokens.get(0).getLine();
054        this.endLine = tokens.get(tokens.size() - 1).getLine();
055      }
056    
057      public int getStartLine() {
058        return startLine;
059      }
060    
061      public int getEndLine() {
062        return endLine;
063      }
064    
065      public String getValue() {
066        return value;
067      }
068    
069      @Override
070      public int hashCode() {
071        int h = hash;
072        if (h == 0) {
073          h = value.hashCode();
074          h = 31 * h + startLine;
075          h = 31 * h + endLine;
076          hash = h;
077        }
078        return h;
079      }
080    
081      @Override
082      public boolean equals(Object obj) {
083        if (!(obj instanceof Statement)) {
084          return false;
085        }
086        Statement other = (Statement) obj;
087        return startLine == other.startLine
088          && endLine == other.endLine
089          && value.equals(other.value);
090      }
091    
092      @Override
093      public String toString() {
094        return "[" + getStartLine() + "-" + getEndLine() + "] [" + getValue() + "]";
095      }
096    
097    }