Source for org.jfree.report.util.beans.ConverterRegistry

   1: /**
   2:  * ========================================
   3:  * JFreeReport : a free Java report library
   4:  * ========================================
   5:  *
   6:  * Project Info:  http://reporting.pentaho.org/
   7:  *
   8:  * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
   9:  *
  10:  * This library is free software; you can redistribute it and/or modify it under the terms
  11:  * of the GNU Lesser General Public License as published by the Free Software Foundation;
  12:  * either version 2.1 of the License, or (at your option) any later version.
  13:  *
  14:  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
  15:  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  16:  * See the GNU Lesser General Public License for more details.
  17:  *
  18:  * You should have received a copy of the GNU Lesser General Public License along with this
  19:  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20:  * Boston, MA 02111-1307, USA.
  21:  *
  22:  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
  23:  * in the United States and other countries.]
  24:  *
  25:  * ------------
  26:  * $Id: ConverterRegistry.java 3525 2007-10-16 11:43:48Z tmorgner $
  27:  * ------------
  28:  * (C) Copyright 2000-2005, by Object Refinery Limited.
  29:  * (C) Copyright 2005-2007, by Pentaho Corporation.
  30:  */
  31: package org.jfree.report.util.beans;
  32: 
  33: import java.awt.Color;
  34: import java.math.BigDecimal;
  35: import java.math.BigInteger;
  36: import java.util.HashMap;
  37: 
  38: public final class ConverterRegistry
  39: {
  40:   private static ConverterRegistry instance;
  41:   private HashMap registeredClasses;
  42: 
  43:   public static synchronized ConverterRegistry getInstance ()
  44:   {
  45:     if (instance == null)
  46:     {
  47:       instance = new ConverterRegistry();
  48:     }
  49:     return instance;
  50:   }
  51: 
  52:   private ConverterRegistry ()
  53:   {
  54:     registeredClasses = new HashMap();
  55:     registeredClasses.put(BigDecimal.class, new BigDecimalValueConverter());
  56:     registeredClasses.put(BigInteger.class, new BigIntegerValueConverter());
  57:     registeredClasses.put(Boolean.class, new BooleanValueConverter());
  58:     registeredClasses.put(Boolean.TYPE, new BooleanValueConverter());
  59:     registeredClasses.put(Byte.class, new ByteValueConverter());
  60:     registeredClasses.put(Byte.TYPE, new ByteValueConverter());
  61:     registeredClasses.put(Character.class, new CharacterValueConverter());
  62:     registeredClasses.put(Character.TYPE, new CharacterValueConverter());
  63:     registeredClasses.put(Color.class, new ColorValueConverter());
  64:     registeredClasses.put(Double.class, new DoubleValueConverter());
  65:     registeredClasses.put(Double.TYPE, new DoubleValueConverter());
  66:     registeredClasses.put(Float.class, new FloatValueConverter());
  67:     registeredClasses.put(Float.TYPE, new FloatValueConverter());
  68:     registeredClasses.put(Integer.class, new IntegerValueConverter());
  69:     registeredClasses.put(Integer.TYPE, new IntegerValueConverter());
  70:     registeredClasses.put(Long.class, new LongValueConverter());
  71:     registeredClasses.put(Long.TYPE, new LongValueConverter());
  72:     registeredClasses.put(Short.class, new ShortValueConverter());
  73:     registeredClasses.put(Short.TYPE, new ShortValueConverter());
  74:     registeredClasses.put(String.class, new StringValueConverter());
  75:     registeredClasses.put(Number.class, new BigDecimalValueConverter());
  76:     registeredClasses.put(Class.class, new ClassValueConverter());
  77:   }
  78: 
  79:   public ValueConverter getValueConverter (final Class c)
  80:   {
  81:     final ValueConverter plain = (ValueConverter) registeredClasses.get(c);
  82:     if (plain != null)
  83:     {
  84:       return plain;
  85:     }
  86:     if (c.isArray())
  87:     {
  88:       final Class componentType = c.getComponentType();
  89:       final ValueConverter componentConverter = getValueConverter(componentType);
  90:       if (componentConverter != null)
  91:       {
  92:         return new ArrayValueConverter(componentType, componentConverter);
  93:       }
  94:     }
  95:     return null;
  96:   }
  97: 
  98:   /**
  99:    * Converts an object to an attribute value.
 100:    *
 101:    * @param o the object.
 102:    * @return the attribute value.
 103:    * @throws BeanException if there was an error during the conversion.
 104:    */
 105:   public static String toAttributeValue (final Object o) throws BeanException
 106:   {
 107:     if (o == null)
 108:     {
 109:       return null;
 110:     }
 111:     final ValueConverter vc =
 112:             ConverterRegistry.getInstance().getValueConverter(o.getClass());
 113:     if (vc == null)
 114:     {
 115:       return null;
 116:     }
 117:     return vc.toAttributeValue(o);
 118:   }
 119: 
 120:   /**
 121:    * Converts a string to a property value.
 122:    *
 123:    * @param s the string.
 124:    * @return a property value.
 125:    * @throws BeanException if there was an error during the conversion.
 126:    */
 127:   public static Object toPropertyValue (final String s, final Class c) throws BeanException
 128:   {
 129:     if (s == null)
 130:     {
 131:       return null;
 132:     }
 133:     final ValueConverter vc =
 134:             ConverterRegistry.getInstance().getValueConverter(c);
 135:     if (vc == null)
 136:     {
 137:       return null;
 138:     }
 139:     return vc.toPropertyValue(s);
 140:   }
 141: 
 142: }