001    /**
002     * www.jcoverage.com
003     * Copyright (C)2003 jcoverage ltd.
004     *
005     * This file is part of jcoverage.
006     *
007     * jcoverage is free software; you can redistribute it and/or modify
008     * it under the terms of the GNU General Public License as published
009     * by the Free Software Foundation; either version 2 of the License,
010     * or (at your option) any later version.
011     *
012     * jcoverage is distributed in the hope that it will be useful, but
013     * WITHOUT ANY WARRANTY; without even the implied warranty of
014     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015     * General Public License for more details.
016     *
017     * You should have received a copy of the GNU General Public License
018     * along with jcoverage; if not, write to the Free Software
019     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
020     * USA
021     *
022     */
023    package com.jcoverage.reporting;
024    
025    import java.util.*;
026    
027    import org.apache.log4j.Logger;
028    
029    /**
030     *
031     */
032    public abstract class AbstractReport implements Report {
033      
034      static Logger logger=Logger.getLogger(AbstractReport.class);
035    
036      Collator collator;
037      Line line;
038      
039      public void setCollator(Collator collator) {
040        this.collator=collator;
041      }
042    
043      public Collator getCollator() {
044        return collator;
045      }
046    
047      public final Page createFrontPage() {
048        Line line=createMasterLine();
049        if (line==null) {
050          throw new NullPointerException("This class ("+getClass()+") must return a valid non-null object from the instantiateMasterLine method");
051        }
052        return line.openDetailPage();
053      }
054    
055      public final Line createMasterLine() {
056        line=instantiateMasterLine();
057        if (line!=null) {
058          line.setReport(this);
059        }
060        return line;
061      }
062    
063      protected Line instantiateMasterLine() {
064        return null;
065      }
066    
067    }