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 }