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: Node.java 3048 2007-07-28 18:02:42Z tmorgner $ 027 * ------------ 028 * (C) Copyright 2000-2005, by Object Refinery Limited. 029 * (C) Copyright 2005-2007, by Pentaho Corporation. 030 */ 031 package org.jfree.report.structure; 032 033 import java.io.Serializable; 034 import java.util.Locale; 035 036 import org.jfree.report.JFreeReport; 037 import org.jfree.report.expressions.Expression; 038 039 /** 040 * A node is the most basic unit in a report. It acts as general superclass for 041 * all other elements. 042 * 043 * @author Thomas Morgner 044 */ 045 public abstract class Node implements Serializable, Cloneable 046 { 047 private Node parent; 048 049 protected Node() 050 { 051 } 052 053 public Node getParent() 054 { 055 return parent; 056 } 057 058 protected void setParent(final Node parent) 059 { 060 this.parent = parent; 061 } 062 063 /** 064 * This is an extra method to allow me to track all *illegal* write-accesses 065 * to the parent. 066 * 067 * @param parent 068 */ 069 public void updateParent(final Node parent) 070 { 071 this.parent = parent; 072 } 073 074 public Group getGroup() 075 { 076 Node parent = getParent(); 077 while (parent != null) 078 { 079 if (parent instanceof Group) 080 { 081 return (Group) parent; 082 } 083 084 parent = parent.getParent(); 085 } 086 return null; 087 } 088 089 public ReportDefinition getReport() 090 { 091 Node parent = getParent(); 092 while (parent != null) 093 { 094 if (parent instanceof ReportDefinition) 095 { 096 return (ReportDefinition) parent; 097 } 098 099 parent = parent.getParent(); 100 } 101 return null; 102 } 103 104 public JFreeReport getRootReport() 105 { 106 Node parent = getParent(); 107 while (parent != null) 108 { 109 if (parent instanceof JFreeReport) 110 { 111 return (JFreeReport) parent; 112 } 113 114 parent = parent.getParent(); 115 } 116 return null; 117 } 118 119 public Locale getLocale() 120 { 121 if (parent != null) 122 { 123 return parent.getLocale(); 124 } 125 return Locale.getDefault(); 126 } 127 128 public Expression getDisplayCondition() 129 { 130 return null; 131 } 132 133 public boolean isEnabled() 134 { 135 return true; 136 } 137 138 public Object clone () throws CloneNotSupportedException 139 { 140 return super.clone(); 141 } 142 }