001    /**
002     * =========================================
003     * LibFormula : a free Java formula library
004     * =========================================
005     *
006     * Project Info:  http://reporting.pentaho.org/libformula/
007     *
008     * (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
009     *
010     * This library is free software; you can redistribute it and/or modify it under the terms
011     * of the GNU Lesser General Public License as published by the Free Software Foundation;
012     * either version 2.1 of the License, or (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015     * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016     * See the GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public License along with this
019     * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020     * Boston, MA 02111-1307, USA.
021     *
022     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023     * in the United States and other countries.]
024     *
025     *
026     * ------------
027     * $Id: DefaultType.java 3521 2007-10-16 10:55:14Z tmorgner $
028     * ------------
029     * (C) Copyright 2006-2007, by Pentaho Corporation.
030     */
031    package org.jfree.formula.typing;
032    
033    import java.util.HashMap;
034    import java.util.HashSet;
035    
036    /**
037     * Creation-Date: 02.11.2006, 09:37:54
038     *
039     * @author Thomas Morgner
040     */
041    public abstract class DefaultType implements Type
042    {
043      private HashSet flags;
044      private HashMap properties;
045      private boolean locked;
046    
047      protected DefaultType()
048      {
049      }
050    
051      public boolean isLocked()
052      {
053        return locked;
054      }
055    
056      public void lock()
057      {
058        this.locked = true;
059      }
060    
061      public void addFlag(final String name)
062      {
063        if (locked)
064        {
065          throw new IllegalStateException();
066        }
067        if (flags == null)
068        {
069          flags = new HashSet();
070        }
071        flags.add(name);
072      }
073    
074      public boolean isFlagSet(final String name)
075      {
076        if (flags == null)
077        {
078          return false;
079        }
080        return flags.contains(name);
081      }
082    
083      public void setProperty(final String name, final Object value)
084      {
085        if (locked)
086        {
087          throw new IllegalStateException();
088        }
089        if (properties == null)
090        {
091          properties = new HashMap();
092        }
093        properties.put(name, value);
094      }
095    
096      public Object getProperty(final String name)
097      {
098        // The type system has no properties yet. This is done later, when we
099        // deal with real meta-data
100        if (properties == null)
101        {
102          return null;
103        }
104        return properties.get(name);
105      }
106    }