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,v 1.9 2007/04/01 18:49:27 taqua Exp $
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 ExpressionReadHandler erh = new ExpressionReadHandler();
128 expressionHandlers.add(erh);
129 return erh;
130 }
131 if ("style-expression".equals(tagName))
132 {
133 StyleExpressionReadHandler erh = new StyleExpressionReadHandler();
134 styleExpressionHandlers.add(erh);
135 return erh;
136 }
137 if ("style-property".equals(tagName))
138 {
139 PropertyReadHandler erh = new PropertyReadHandler();
140 stylePropertyHandlers.add(erh);
141 return erh;
142 }
143 if ("attribute-expression".equals(tagName))
144 {
145 AttributeExpressionReadHandler erh = new AttributeExpressionReadHandler();
146 attributeExpressionHandlers.add(erh);
147 return erh;
148 }
149 if ("attribute".equals(tagName))
150 {
151 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(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 }