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Java > Open Source Codes > org > pentaho > ui > portlet > charting > PieDatasetChartPortlet


1 /*
2  * Copyright 2006 Pentaho Corporation. All rights reserved.
3  * This software was developed by Pentaho Corporation and is provided under the terms
4  * of the Mozilla Public License, Version 1.1, or any later version. You may not use
5  * this file except in compliance with the license. If you need a copy of the license,
6  * please go to http://www.mozilla.org/MPL/MPL-1.1.txt. The Original Code is the Pentaho
7  * BI Platform. The Initial Developer is Pentaho Corporation.
8  *
9  * Software distributed under the Mozilla Public License is distributed on an "AS IS"
10  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. Please refer to
11  * the license for the specific language governing your rights and limitations.
12  *
13  * @created Aug 24, 2005
14  * @author James Dixon
15  */

16
17 package org.pentaho.ui.portlet.charting;
18
19 import java.io.IOException JavaDoc;
20 import java.util.ArrayList JavaDoc;
21 import java.util.StringTokenizer JavaDoc;
22
23 import javax.portlet.ActionRequest;
24 import javax.portlet.ActionResponse;
25 import javax.portlet.PortletException;
26 import javax.portlet.RenderRequest;
27 import javax.portlet.RenderResponse;
28
29 import org.apache.commons.logging.Log;
30 import org.apache.commons.logging.LogFactory;
31 import org.pentaho.messages.Messages;
32 import org.pentaho.core.util.UIUtil;
33 import org.pentaho.ui.component.charting.PieDatasetChartComponent;
34 import org.pentaho.ui.portlet.PentahoPortletSession;
35 import org.pentaho.ui.portlet.PortletRequestParameterProvider;
36 import org.pentaho.ui.portlet.PortletSessionParameterProvider;
37 import org.pentaho.ui.portlet.PortletUrlFactory;
38 import org.pentaho.ui.portlet.ViewPortlet;
39
40 public class PieDatasetChartPortlet extends ViewPortlet {
41
42     private static final String JavaDoc CHART = "chart"; //$NON-NLS-1$
43

44     private static final Log portletLogger = LogFactory.getLog(PieDatasetChartPortlet.class);
45
46     public Log getLogger() {
47         return portletLogger;
48     }
49
50     public void processPortletAction(ActionRequest request, ActionResponse response, PentahoPortletSession userSession) throws PortletException, IOException JavaDoc {
51
52     }
53
54     public void doPortletView(RenderRequest request, RenderResponse response, PentahoPortletSession userSession) throws PortletException, IOException JavaDoc {
55         response.setContentType("text/html"); //$NON-NLS-1$
56

57         PortletUrlFactory urlFactory = new PortletUrlFactory(response, request.getWindowState(), request.getPortletMode());
58
59         PortletRequestParameterProvider requestParameters = new PortletRequestParameterProvider(request);
60         PortletSessionParameterProvider sessionParameters = new PortletSessionParameterProvider(userSession);
61
62         String JavaDoc chartDefinitionStr = getSetting(CHART, null, request, requestParameters);
63
64         if (chartDefinitionStr == null) {
65             response.getWriter().print(Messages.getString("CategoryDatasetChartPortlet.ERROR_0001.NO_CHART_DEF")); //$NON-NLS-1$
66
return;
67         }
68
69         ArrayList JavaDoc messages = new ArrayList JavaDoc();
70         PieDatasetChartComponent chartComponent = null;
71         String JavaDoc urlDrillTemplate = getSetting("drill-url", null, request, null); //$NON-NLS-1$
72
String JavaDoc outerParams = getSetting("outer-params", null, request, null); //$NON-NLS-1$
73
String JavaDoc innerParam = getSetting("inner-param", null, request, null); //$NON-NLS-1$
74

75         try {
76             chartComponent = new PieDatasetChartComponent(chartDefinitionStr, urlFactory, messages);
77             chartComponent.setUrlTemplate(urlDrillTemplate);
78             StringTokenizer JavaDoc tokenizer = new StringTokenizer JavaDoc(outerParams, ";"); //$NON-NLS-1$
79
while (tokenizer.hasMoreTokens()) {
80                 chartComponent.addOuterParamName(tokenizer.nextToken());
81             }
82             chartComponent.setParamName(innerParam);
83
84             chartComponent.validate(userSession, null);
85             chartComponent.setDataAction(chartDefinitionStr);
86
87             chartComponent.setParameterProvider("request", requestParameters); //$NON-NLS-1$
88
chartComponent.setParameterProvider("session", sessionParameters); //$NON-NLS-1$
89

90             String JavaDoc content = chartComponent.getContent("text/html"); //$NON-NLS-1$
91

92             if (content == null || content.equals("")) { //$NON-NLS-1$
93
content = " "; //$NON-NLS-1$
94
}
95             response.getWriter().print(content);
96
97             if (content == null) {
98                 StringBuffer JavaDoc buffer = new StringBuffer JavaDoc();
99                 UIUtil.formatErrorMessage("text/html", Messages.getString("CategoryDatasetChartPortlet.ERROR_0002.COULD_NOT_CREATE"), messages, buffer); //$NON-NLS-1$ //$NON-NLS-2$
100
content = buffer.toString();
101             }
102         } finally {
103             if (chartComponent != null)
104                 chartComponent.dispose();
105         }
106     }
107 }
108
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