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: BufferedReportTarget.java,v 1.2 2007/04/01 18:49:25 taqua Exp $
027 * ------------
028 * (C) Copyright 2000-2005, by Object Refinery Limited.
029 * (C) Copyright 2005-2007, by Pentaho Corporation.
030 */
031
032 package org.jfree.report.flow.layoutprocessor;
033
034 import java.util.ArrayList;
035
036 import org.jfree.layouting.namespace.NamespaceDefinition;
037 import org.jfree.layouting.util.AttributeMap;
038 import org.jfree.report.DataFlags;
039 import org.jfree.report.DataSourceException;
040 import org.jfree.report.ReportProcessingException;
041 import org.jfree.report.flow.ReportStructureRoot;
042 import org.jfree.report.flow.ReportTarget;
043
044 /**
045 * Todo: Document me!
046 *
047 * @author Thomas Morgner
048 * @since 05.03.2007
049 */
050 public class BufferedReportTarget implements ReportTarget, Cloneable
051 {
052 public static class RecordedCall
053 {
054 private int methodId;
055 private Object parameters;
056
057 public RecordedCall(final int method, final Object parameters)
058 {
059 this.methodId = method;
060 this.parameters = parameters;
061 }
062
063 public int getMethod()
064 {
065 return methodId;
066 }
067
068 public Object getParameters()
069 {
070 return parameters;
071 }
072 }
073
074 private static final int MTH_START_REPORT = 1;
075 private static final int MTH_START_ELEMENT = 2;
076 private static final int MTH_PROCESS_TEXT = 3;
077 private static final int MTH_PROCESS_CONTENT = 4;
078 private static final int MTH_END_ELEMENT = 5;
079 private static final int MTH_END_REPORT = 6;
080
081 private ReportTarget target;
082 private ArrayList calls;
083
084 public BufferedReportTarget()
085 {
086 this.calls = new ArrayList();
087 }
088
089 public ReportTarget getTarget()
090 {
091 return target;
092 }
093
094 public void setTarget(final ReportTarget target)
095 {
096 this.target = target;
097 }
098
099 public void startReport(final ReportStructureRoot report)
100 throws DataSourceException, ReportProcessingException
101 {
102 calls.add(new RecordedCall
103 (BufferedReportTarget.MTH_START_REPORT, report));
104 }
105
106 public void startElement(final AttributeMap attrs)
107 throws DataSourceException, ReportProcessingException
108 {
109 try
110 {
111 calls.add(new RecordedCall
112 (BufferedReportTarget.MTH_START_ELEMENT, attrs.clone()));
113 }
114 catch (CloneNotSupportedException e)
115 {
116 throw new ReportProcessingException("Failed to clone attributes", e);
117 }
118 }
119
120 public void processText(final String text)
121 throws DataSourceException, ReportProcessingException
122 {
123 calls.add(new RecordedCall
124 (BufferedReportTarget.MTH_PROCESS_TEXT, text));
125 }
126
127 public void processContent(final DataFlags value)
128 throws DataSourceException, ReportProcessingException
129 {
130 calls.add(new RecordedCall
131 (BufferedReportTarget.MTH_PROCESS_CONTENT, value));
132 }
133
134 public void endElement(final AttributeMap attrs)
135 throws DataSourceException, ReportProcessingException
136 {
137 try
138 {
139 calls.add(new RecordedCall
140 (BufferedReportTarget.MTH_END_ELEMENT, attrs.clone()));
141 }
142 catch (CloneNotSupportedException e)
143 {
144 throw new ReportProcessingException("Failed to clone attributes", e);
145 }
146 }
147
148 public void endReport(final ReportStructureRoot report)
149 throws DataSourceException, ReportProcessingException
150 {
151 calls.add(new RecordedCall
152 (BufferedReportTarget.MTH_END_REPORT, report));
153 }
154
155 public String getExportDescriptor()
156 {
157 return target.getExportDescriptor();
158 }
159
160 public NamespaceDefinition getNamespaceByUri(final String uri)
161 {
162 return target.getNamespaceByUri(uri);
163 }
164
165 public void commit()
166 throws ReportProcessingException
167 {
168 // ignored ..
169 }
170
171 public void close(final ReportTarget target)
172 throws ReportProcessingException, DataSourceException
173 {
174 final RecordedCall[] objects = (RecordedCall[])
175 calls.toArray(new RecordedCall[calls.size()]);
176
177 for (int i = 0; i < objects.length; i++)
178 {
179 final RecordedCall call = objects[i];
180 switch(call.getMethod())
181 {
182 case BufferedReportTarget.MTH_START_REPORT:
183 {
184 target.startReport((ReportStructureRoot) call.getParameters());
185 break;
186 }
187 case BufferedReportTarget.MTH_START_ELEMENT:
188 {
189 target.startElement((AttributeMap) call.getParameters());
190 break;
191 }
192 case BufferedReportTarget.MTH_PROCESS_TEXT:
193 {
194 target.processText((String) call.getParameters());
195 break;
196 }
197 case BufferedReportTarget.MTH_PROCESS_CONTENT:
198 {
199 target.processContent((DataFlags) call.getParameters());
200 break;
201 }
202 case BufferedReportTarget.MTH_END_ELEMENT:
203 {
204 target.endElement((AttributeMap) call.getParameters());
205 break;
206 }
207 case BufferedReportTarget.MTH_END_REPORT:
208 {
209 target.endReport((ReportStructureRoot) call.getParameters());
210 break;
211 }
212 default:
213 throw new IllegalStateException("Invalid call recorded.");
214 }
215 }
216 }
217
218 public Object clone ()
219 {
220 try
221 {
222 final BufferedReportTarget o = (BufferedReportTarget) super.clone();
223 o.calls = (ArrayList) calls.clone();
224 return o;
225 }
226 catch (CloneNotSupportedException e)
227 {
228 throw new IllegalStateException("Clone failed");
229 }
230 }
231 }