001    /*
002      Copyright (C) 2003 Laurent Martelli <laurent@aopsys.com>
003    
004      This program is free software; you can redistribute it and/or modify
005      it under the terms of the GNU Lesser General Public License as
006      published by the Free Software Foundation; either version 2 of the
007      License, or (at your option) any later version.
008    
009      This program is distributed in the hope that it will be useful,
010      but WITHOUT ANY WARRANTY; without even the implied warranty of
011      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
012      GNU Lesser General Public License for more details.
013    
014      You should have received a copy of the GNU Lesser General Public License
015      along with this program; if not, write to the Free Software
016      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
017    
018    package org.objectweb.jac.aspects.gui;
019    
020    import java.text.DecimalFormat;
021    import java.text.ParsePosition;
022    import org.apache.log4j.Logger;
023    import org.objectweb.jac.core.rtti.FieldItem;
024    import org.objectweb.jac.core.rtti.MetaItem;
025    import org.objectweb.jac.core.rtti.RttiAC;
026    import org.objectweb.jac.util.Strings;
027    
028    public class FloatFormat implements NumberFormat {
029        static Logger logger = Logger.getLogger("gui");    
030    
031        protected DecimalFormat format;
032        protected FieldItem field;
033        
034        public FloatFormat(FieldItem field) {
035            this.field = field;
036    
037            MetaItem type = field!=null?RttiAC.getFieldType(field):null;
038            String formatString = null;
039            if (type!=null)
040                formatString = GuiAC.getFloatFormat(type);
041            else if (field!=null)
042                formatString = GuiAC.getFloatFormat(field);
043            else
044                formatString = GuiAC.getFloatFormat();
045    
046            if (formatString!=null) 
047                format = new DecimalFormat(formatString);
048            else
049                logger.error("No format for "+field);
050        }
051        
052        public String format(Object value) {
053            return format((Number)value);
054        }
055    
056        public String format(Number value) {
057            if (value!=null)
058                return format(value.doubleValue());
059            else
060                return "";
061        }
062    
063        public String format(double value) {
064            if (format!=null)
065                return format.format(value);
066            else
067                return ""+value;
068        }
069    
070        public Object parse(String str, ParsePosition pos) {
071            return parseNumber(str,pos);
072        }
073    
074        public Number parseNumber(String str, ParsePosition pos) {
075            String string = str.trim();
076    
077            if (Strings.isEmpty(string))
078                return null;
079    
080            return format.parse(str,pos);
081        }
082    
083        public Float parseFloat(String str, ParsePosition pos) {
084            Number n = parseNumber(str,pos);
085            if (n!=null) {
086                return new Float(n.floatValue());
087            } else {
088                return null;
089            }
090        }
091    
092        public Double parseDouble(String str, ParsePosition pos) {
093            Number n = parseNumber(str,pos);
094            if (n!=null) {
095                return new Double(n.doubleValue());
096            } else {
097                return null;
098            }
099        }
100    }
101