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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: BeanPropertyLookupParser.java 2725 2007-04-01 18:49:29Z taqua $ 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 org.jfree.report.util.CSVTokenizer; 34: import org.jfree.report.util.PropertyLookupParser; 35: 36: public abstract class BeanPropertyLookupParser extends PropertyLookupParser 37: { 38: public BeanPropertyLookupParser () 39: { 40: } 41: 42: /** 43: * 44: * @param name 45: * @return 46: */ 47: protected abstract Object performInitialLookup (String name); 48: 49: protected String lookupVariable (final String entity) 50: { 51: // first, split the entity into separate strings (separator is '.'). 52: 53: final CSVTokenizer tokenizer = new CSVTokenizer(entity, "."); 54: if (tokenizer.hasMoreTokens()) 55: { 56: final String name = tokenizer.nextToken(); 57: final Object base = performInitialLookup(name); 58: try 59: { 60: if (tokenizer.hasMoreTokens()) 61: { 62: return continueLookupVariable(tokenizer, base); 63: } 64: else 65: { 66: return ConverterRegistry.toAttributeValue(base); 67: } 68: } 69: catch (BeanException e) 70: { 71: return entity; 72: } 73: } 74: return entity; 75: } 76: 77: private static String continueLookupVariable (final CSVTokenizer tokenizer, 78: final Object parent) 79: throws BeanException 80: { 81: if (tokenizer.hasMoreTokens()) 82: { 83: final String name = tokenizer.nextToken(); 84: final Object base = ConverterRegistry.toPropertyValue(name, parent.getClass()); 85: if (tokenizer.hasMoreTokens()) 86: { 87: return continueLookupVariable(tokenizer, base); 88: } 89: else 90: { 91: return ConverterRegistry.toAttributeValue(base); 92: } 93: } 94: return null; 95: } 96: 97: }