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: AbstractElementReadHandler.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.modules.factories.report.base.NodeReadHandler; 036 import org.jfree.report.structure.Element; 037 import org.jfree.report.structure.Node; 038 import org.jfree.xmlns.parser.AbstractXmlReadHandler; 039 import org.jfree.xmlns.parser.PropertyReadHandler; 040 import org.jfree.xmlns.parser.RootXmlReadHandler; 041 import org.jfree.xmlns.parser.XmlReadHandler; 042 import org.xml.sax.Attributes; 043 import org.xml.sax.SAXException; 044 045 /** 046 * Creation-Date: 09.04.2006, 13:55:36 047 * 048 * @author Thomas Morgner 049 */ 050 public abstract class AbstractElementReadHandler 051 extends AbstractXmlReadHandler implements NodeReadHandler 052 { 053 private boolean virtual; 054 private boolean enabled; 055 private String style; 056 private ArrayList expressionHandlers; 057 private ArrayList styleExpressionHandlers; 058 private ArrayList attributeExpressionHandlers; 059 private ArrayList attributeHandlers; 060 private ArrayList stylePropertyHandlers; 061 private DisplayConditionReadHandler displayConditionReadHandler; 062 063 protected AbstractElementReadHandler() 064 { 065 expressionHandlers = new ArrayList(); 066 styleExpressionHandlers = new ArrayList(); 067 attributeExpressionHandlers = new ArrayList(); 068 stylePropertyHandlers = new ArrayList(); 069 attributeHandlers = new ArrayList(); 070 } 071 072 public boolean isEnabled() 073 { 074 return enabled; 075 } 076 077 public String getStyle() 078 { 079 return style; 080 } 081 082 /** 083 * Initialises the handler. 084 * 085 * @param rootHandler the root handler. 086 * @param tagName the tag name. 087 */ 088 public void init(final RootXmlReadHandler rootHandler, 089 final String uri, 090 final String tagName) 091 { 092 super.init(rootHandler, uri, tagName); 093 094 final Element element = getElement(); 095 element.setNamespace(uri); 096 element.setType(tagName); 097 } 098 099 /** 100 * Starts parsing. 101 * 102 * @param attrs the attributes. 103 * @throws SAXException if there is a parsing error. 104 */ 105 protected void startParsing(final Attributes attrs) throws SAXException 106 { 107 super.startParsing(attrs); 108 style = attrs.getValue(FlowReportFactoryModule.NAMESPACE, "style"); 109 final String enabledValue = attrs.getValue(FlowReportFactoryModule.NAMESPACE, "enabled"); 110 if (enabledValue != null) 111 { 112 enabled = "true".equals(enabledValue); 113 } 114 else 115 { 116 enabled = true; 117 } 118 119 final String virtualValue = attrs.getValue(FlowReportFactoryModule.NAMESPACE, "virtual"); 120 if (virtualValue != null) 121 { 122 virtual = "true".equals(virtualValue); 123 } 124 else 125 { 126 virtual = false; 127 } 128 } 129 130 /** 131 * Returns the handler for a child element. 132 * 133 * @param tagName the tag name. 134 * @param atts the attributes. 135 * @return the handler or null, if the tagname is invalid. 136 * @throws SAXException if there is a parsing error. 137 * @throws XmlReaderException if there is a reader error. 138 */ 139 protected XmlReadHandler getHandlerForChild(final String uri, 140 final String tagName, 141 final Attributes atts) 142 throws SAXException 143 { 144 if (FlowReportFactoryModule.NAMESPACE.equals(uri)) 145 { 146 if ("expression".equals(tagName)) 147 { 148 final ExpressionReadHandler erh = new ExpressionReadHandler(); 149 expressionHandlers.add(erh); 150 return erh; 151 } 152 if ("style-expression".equals(tagName)) 153 { 154 final StyleExpressionReadHandler erh = new StyleExpressionReadHandler(); 155 styleExpressionHandlers.add(erh); 156 return erh; 157 } 158 if ("style-property".equals(tagName)) 159 { 160 final PropertyReadHandler erh = new PropertyReadHandler(); 161 stylePropertyHandlers.add(erh); 162 return erh; 163 } 164 if ("attribute-expression".equals(tagName)) 165 { 166 final AttributeExpressionReadHandler erh = new AttributeExpressionReadHandler(); 167 attributeExpressionHandlers.add(erh); 168 return erh; 169 } 170 if ("attribute".equals(tagName)) 171 { 172 final AttributeReadHandler erh = new AttributeReadHandler(); 173 attributeHandlers.add(erh); 174 return erh; 175 } 176 if ("display-condition".equals(tagName)) 177 { 178 displayConditionReadHandler = new DisplayConditionReadHandler(); 179 return displayConditionReadHandler; 180 } 181 } 182 return null; 183 } 184 185 protected void configureElement(final Element e) 186 { 187 if (displayConditionReadHandler != null) 188 { 189 e.setDisplayCondition(displayConditionReadHandler.getExpression()); 190 } 191 for (int i = 0; i < expressionHandlers.size(); i++) 192 { 193 final ExpressionReadHandler handler = 194 (ExpressionReadHandler) expressionHandlers.get(i); 195 e.addExpression(handler.getExpression()); 196 } 197 for (int i = 0; i < styleExpressionHandlers.size(); i++) 198 { 199 final StyleExpressionReadHandler handler = 200 (StyleExpressionReadHandler) styleExpressionHandlers .get(i); 201 e.setStyleExpression(handler.getStyleKey(), handler.getExpression()); 202 } 203 for (int i = 0; i < stylePropertyHandlers.size(); i++) 204 { 205 206 final PropertyReadHandler handler = 207 (PropertyReadHandler) stylePropertyHandlers .get(i); 208 e.getStyle().setPropertyValueAsString(handler.getName(), handler.getResult()); 209 } 210 for (int i = 0; i < attributeExpressionHandlers.size(); i++) 211 { 212 final AttributeExpressionReadHandler handler = 213 (AttributeExpressionReadHandler) attributeExpressionHandlers .get( 214 i); 215 e.setAttributeExpression(handler.getAttributeName(), 216 handler.getExpression()); 217 } 218 for (int i = 0; i < attributeHandlers.size(); i++) 219 { 220 final AttributeReadHandler handler = 221 (AttributeReadHandler) attributeHandlers .get(i); 222 e.setAttribute(handler.getNamespace(), handler.getName(), handler.getObject()); 223 } 224 e.setEnabled(enabled); 225 e.setVirtual(virtual); 226 if (style != null) 227 { 228 e.setAttribute(FlowReportFactoryModule.NAMESPACE,"style", style); 229 } 230 } 231 232 protected abstract Element getElement(); 233 234 public final Node getNode() 235 { 236 return getElement(); 237 } 238 239 /** 240 * Returns the object for this element or null, if this element does not 241 * create an object. 242 * 243 * @return the object. 244 * @throws XmlReaderException if there is a parsing error. 245 */ 246 public Object getObject() throws SAXException 247 { 248 return getElement(); 249 } 250 }