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: PrecomputedValueRegistryBuilder.java 3525 2007-10-16 11:43:48Z tmorgner $ 027 * ------------ 028 * (C) Copyright 2000-2005, by Object Refinery Limited. 029 * (C) Copyright 2005-2007, by Pentaho Corporation. 030 */ 031 032 package org.jfree.report.data; 033 034 /** 035 * This class is currently very primitive and enforces a recomputation of 036 * precomputed values each time. 037 * 038 * @author Thomas Morgner 039 */ 040 public class PrecomputedValueRegistryBuilder implements PrecomputedValueRegistry 041 { 042 private PrecomputeNodeImpl node; 043 044 public PrecomputedValueRegistryBuilder() 045 { 046 } 047 048 public void startElementPrecomputation(final PrecomputeNodeKey element) 049 { 050 startElement(element); 051 } 052 053 public void finishElementPrecomputation(final PrecomputeNodeKey element) 054 { 055 finishElement(element); 056 } 057 058 public void startElement(final PrecomputeNodeKey element) 059 { 060 final PrecomputeNodeImpl newNode = new PrecomputeNodeImpl (element); 061 if (node != null) 062 { 063 newNode.setParent(node); 064 } 065 node = newNode; 066 } 067 068 public void finishElement(final PrecomputeNodeKey element) 069 { 070 node = (PrecomputeNodeImpl) node.getParent(); 071 } 072 073 public PrecomputeNode currentNode() 074 { 075 return node; 076 } 077 078 public void addFunction(final String name, final Object value) 079 { 080 node.addFunction(name, value); 081 } 082 }