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: ElementReadHandler.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 package org.jfree.report.modules.factories.report.flow; 032 033 import java.util.ArrayList; 034 035 import org.jfree.report.structure.Element; 036 import org.jfree.xmlns.parser.AbstractXmlReadHandler; 037 import org.jfree.xmlns.parser.PropertyReadHandler; 038 import org.jfree.xmlns.parser.XmlReadHandler; 039 import org.xml.sax.Attributes; 040 import org.xml.sax.SAXException; 041 042 /** 043 * Creation-Date: 09.04.2006, 13:55:36 044 * 045 * @author Thomas Morgner 046 */ 047 public abstract class ElementReadHandler extends AbstractXmlReadHandler 048 { 049 private boolean virtual; 050 private boolean enabled; 051 private String style; 052 private ArrayList expressionHandlers; 053 private ArrayList styleExpressionHandlers; 054 private ArrayList attributeExpressionHandlers; 055 private ArrayList attributeHandlers; 056 private ArrayList stylePropertyHandlers; 057 private DisplayConditionReadHandler displayConditionReadHandler; 058 059 protected ElementReadHandler() 060 { 061 expressionHandlers = new ArrayList(); 062 styleExpressionHandlers = new ArrayList(); 063 attributeExpressionHandlers = new ArrayList(); 064 stylePropertyHandlers = new ArrayList(); 065 attributeHandlers = new ArrayList(); 066 } 067 068 public boolean isEnabled() 069 { 070 return enabled; 071 } 072 073 public String getStyle() 074 { 075 return style; 076 } 077 078 /** 079 * Starts parsing. 080 * 081 * @param attrs the attributes. 082 * @throws SAXException if there is a parsing error. 083 */ 084 protected void startParsing(final Attributes attrs) throws SAXException 085 { 086 super.startParsing(attrs); 087 style = attrs.getValue(FlowReportFactoryModule.NAMESPACE, "style"); 088 final String enabledValue = attrs.getValue(FlowReportFactoryModule.NAMESPACE, "enabled"); 089 if (enabledValue != null) 090 { 091 enabled = "true".equals(enabledValue); 092 } 093 else 094 { 095 enabled = true; 096 } 097 098 final String virtualValue = attrs.getValue(FlowReportFactoryModule.NAMESPACE, "virtual"); 099 if (virtualValue != null) 100 { 101 virtual = "true".equals(virtualValue); 102 } 103 else 104 { 105 virtual = false; 106 } 107 } 108 109 /** 110 * Returns the handler for a child element. 111 * 112 * @param tagName the tag name. 113 * @param atts the attributes. 114 * @return the handler or null, if the tagname is invalid. 115 * @throws SAXException if there is a parsing error. 116 * @throws XmlReaderException if there is a reader error. 117 */ 118 protected XmlReadHandler getHandlerForChild(final String uri, 119 final String tagName, 120 final Attributes atts) 121 throws SAXException 122 { 123 if (FlowReportFactoryModule.NAMESPACE.equals(uri)) 124 { 125 if ("expression".equals(tagName)) 126 { 127 final ExpressionReadHandler erh = new ExpressionReadHandler(); 128 expressionHandlers.add(erh); 129 return erh; 130 } 131 if ("style-expression".equals(tagName)) 132 { 133 final StyleExpressionReadHandler erh = new StyleExpressionReadHandler(); 134 styleExpressionHandlers.add(erh); 135 return erh; 136 } 137 if ("style-property".equals(tagName)) 138 { 139 final PropertyReadHandler erh = new PropertyReadHandler(); 140 stylePropertyHandlers.add(erh); 141 return erh; 142 } 143 if ("attribute-expression".equals(tagName)) 144 { 145 final AttributeExpressionReadHandler erh = new AttributeExpressionReadHandler(); 146 attributeExpressionHandlers.add(erh); 147 return erh; 148 } 149 if ("attribute".equals(tagName)) 150 { 151 final AttributeReadHandler erh = new AttributeReadHandler(); 152 attributeHandlers.add(erh); 153 return erh; 154 } 155 if ("display-condition".equals(tagName)) 156 { 157 displayConditionReadHandler = new DisplayConditionReadHandler(); 158 return displayConditionReadHandler; 159 } 160 } 161 return null; 162 } 163 164 protected void configureElement(final Element e) 165 { 166 if (displayConditionReadHandler != null) 167 { 168 e.setDisplayCondition(displayConditionReadHandler.getExpression()); 169 } 170 for (int i = 0; i < expressionHandlers.size(); i++) 171 { 172 final ExpressionReadHandler handler = 173 (ExpressionReadHandler) expressionHandlers.get(i); 174 e.addExpression(handler.getExpression()); 175 } 176 for (int i = 0; i < styleExpressionHandlers.size(); i++) 177 { 178 final StyleExpressionReadHandler handler = 179 (StyleExpressionReadHandler) styleExpressionHandlers .get(i); 180 e.setStyleExpression(handler.getStyleKey(), handler.getExpression()); 181 } 182 for (int i = 0; i < stylePropertyHandlers.size(); i++) 183 { 184 185 final PropertyReadHandler handler = 186 (PropertyReadHandler) stylePropertyHandlers .get(i); 187 e.getStyle().setPropertyValueAsString(handler.getName(), handler.getResult()); 188 } 189 for (int i = 0; i < attributeExpressionHandlers.size(); i++) 190 { 191 final AttributeExpressionReadHandler handler = 192 (AttributeExpressionReadHandler) attributeExpressionHandlers .get( 193 i); 194 e.setAttributeExpression(handler.getAttributeName(), 195 handler.getExpression()); 196 } 197 for (int i = 0; i < attributeHandlers.size(); i++) 198 { 199 final AttributeReadHandler handler = 200 (AttributeReadHandler) attributeHandlers .get(i); 201 e.setAttribute(handler.getNamespace(), handler.getName(), handler.getObject()); 202 } 203 e.setEnabled(enabled); 204 e.setVirtual(virtual); 205 if (style != null) 206 { 207 e.setAttribute(FlowReportFactoryModule.NAMESPACE,"style", style); 208 } 209 } 210 211 protected abstract Element getElement(); 212 213 /** 214 * Returns the object for this element or null, if this element does not 215 * create an object. 216 * 217 * @return the object. 218 * @throws XmlReaderException if there is a parsing error. 219 */ 220 public Object getObject() throws SAXException 221 { 222 return getElement(); 223 } 224 }