001 /** 002 * ======================================== 003 * JFreeReport : a free Java report library 004 * ======================================== 005 * 006 * Project Info: http://reporting.pentaho.org/ 007 * 008 * (C) Copyright 2000-2007, by Object Refinery Limited, 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 * $Id: BeanPropertyLookupParser.java 2725 2007-04-01 18:49:29Z taqua $ 027 * ------------ 028 * (C) Copyright 2000-2005, by Object Refinery Limited. 029 * (C) Copyright 2005-2007, by Pentaho Corporation. 030 */ 031 package org.jfree.report.util.beans; 032 033 import org.jfree.report.util.CSVTokenizer; 034 import org.jfree.report.util.PropertyLookupParser; 035 036 public abstract class BeanPropertyLookupParser extends PropertyLookupParser 037 { 038 public BeanPropertyLookupParser () 039 { 040 } 041 042 /** 043 * 044 * @param name 045 * @return 046 */ 047 protected abstract Object performInitialLookup (String name); 048 049 protected String lookupVariable (final String entity) 050 { 051 // first, split the entity into separate strings (separator is '.'). 052 053 final CSVTokenizer tokenizer = new CSVTokenizer(entity, "."); 054 if (tokenizer.hasMoreTokens()) 055 { 056 final String name = tokenizer.nextToken(); 057 final Object base = performInitialLookup(name); 058 try 059 { 060 if (tokenizer.hasMoreTokens()) 061 { 062 return continueLookupVariable(tokenizer, base); 063 } 064 else 065 { 066 return ConverterRegistry.toAttributeValue(base); 067 } 068 } 069 catch (BeanException e) 070 { 071 return entity; 072 } 073 } 074 return entity; 075 } 076 077 private static String continueLookupVariable (final CSVTokenizer tokenizer, 078 final Object parent) 079 throws BeanException 080 { 081 if (tokenizer.hasMoreTokens()) 082 { 083 final String name = tokenizer.nextToken(); 084 final Object base = ConverterRegistry.toPropertyValue(name, parent.getClass()); 085 if (tokenizer.hasMoreTokens()) 086 { 087 return continueLookupVariable(tokenizer, base); 088 } 089 else 090 { 091 return ConverterRegistry.toAttributeValue(base); 092 } 093 } 094 return null; 095 } 096 097 }