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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: PrecomputedValueRegistryBuilder.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: 32: package org.jfree.report.data; 33: 34: /** 35: * This class is currently very primitive and enforces a recomputation of 36: * precomputed values each time. 37: * 38: * @author Thomas Morgner 39: */ 40: public class PrecomputedValueRegistryBuilder implements PrecomputedValueRegistry 41: { 42: private PrecomputeNodeImpl node; 43: 44: public PrecomputedValueRegistryBuilder() 45: { 46: } 47: 48: public void startElementPrecomputation(final PrecomputeNodeKey element) 49: { 50: startElement(element); 51: } 52: 53: public void finishElementPrecomputation(final PrecomputeNodeKey element) 54: { 55: finishElement(element); 56: } 57: 58: public void startElement(final PrecomputeNodeKey element) 59: { 60: final PrecomputeNodeImpl newNode = new PrecomputeNodeImpl (element); 61: if (node != null) 62: { 63: newNode.setParent(node); 64: } 65: node = newNode; 66: } 67: 68: public void finishElement(final PrecomputeNodeKey element) 69: { 70: node = (PrecomputeNodeImpl) node.getParent(); 71: } 72: 73: public PrecomputeNode currentNode() 74: { 75: return node; 76: } 77: 78: public void addFunction(final String name, final Object value) 79: { 80: node.addFunction(name, value); 81: } 82: }