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1
7
8 package org.jboss.portal.core.theme.tag;
9
10 import org.apache.log4j.Logger;
11 import org.jboss.portal.common.MediaType;
12 import org.jboss.portal.core.theme.render.RendererFactory;
13 import org.jboss.portal.server.LayoutServer;
14 import org.jboss.portal.server.PortalRequest;
15 import org.jboss.portal.server.PortalServer;
16 import org.jboss.portal.server.ServerObjectID;
17 import org.jboss.portal.server.Window;
18 import org.jboss.portal.server.WindowContext;
19 import org.jboss.portal.server.output.FragmentResult;
20 import org.jboss.portal.server.theme.Item;
21 import org.jboss.portal.server.theme.LayoutConstants;
22 import org.jboss.portal.server.theme.PageHolder;
23 import org.jboss.portal.server.theme.PortalLayout;
24 import org.jboss.portal.server.theme.PortalRenderSet;
25 import org.jboss.portal.server.theme.Region;
26 import org.jboss.portal.server.theme.RegionOrientation;
27 import org.jboss.portal.server.theme.RegionSet;
28 import org.jboss.portal.server.theme.render.RenderContext;
29 import org.jboss.portal.server.theme.render.RenderException;
30
31 import javax.activation.MimeTypeParseException  ;
32 import javax.servlet.http.HttpServletRequest ;
33 import javax.servlet.http.HttpServletResponse ;
34 import javax.servlet.jsp.JspException ;
35 import javax.servlet.jsp.JspWriter ;
36 import javax.servlet.jsp.PageContext ;
37 import javax.servlet.jsp.tagext.SimpleTagSupport ;
38 import java.io.IOException ;
39 import java.util.Iterator ;
40
41
54 public class PortletTagHandler extends SimpleTagSupport
55 {
56 private static Logger log = Logger.getLogger(PortletTagHandler.class);
57 private String portletInstanceRef = null;
58
59
72 public void doTag() throws JspException , IOException
73 {
74 log.info("rendering portlet " + portletInstanceRef);
75
76 JspWriter out = this.getJspContext().getOut();
77
78 if (getInstanceRef() == null)
79 {
80 out.write("<p bgcolor='red'>No Portlet to render!</p>");
81 out.write("<p bgcolor='red'>The Portlet to render must be set in the tag attribute '" +
82 LayoutConstants.ATTR_PORTLET_INSTANCE_REF + "'</p>");
83 out.flush();
84 return;
85 }
86
87 PageContext app = (PageContext )getJspContext();
88 HttpServletRequest request = (HttpServletRequest )app.getRequest();
89 HttpServletResponse response = (HttpServletResponse )app.getResponse();
90
91 PageHolder requestedPage = (PageHolder)request.getAttribute(LayoutConstants.ATTR_PAGE);
92 if (requestedPage == null)
93 {
94 out.write("<p bgcolor='red'>No page to render!</p>");
95 out.write("<p bgcolor='red'>The page to render (PageHolder) must be set in the request attribute '" +
96 LayoutConstants.ATTR_PAGE + "'</p>");
97 out.flush();
98 return;
99 }
100
101 LayoutServer layoutServer = (LayoutServer)request.getAttribute(LayoutConstants.ATTR_LAYOUTSERVER);
102 if (layoutServer == null)
103 {
104 log.error("no layout server provided in this request");
105 throw new JspException ("no layout server provided in this request");
106 }
107
108 RegionSet regions = requestedPage.getRegions();
109 Region region = null;
110 FragmentResult fragment = null;
111 PortalRequest portalRequest = (PortalRequest)request.getAttribute("REQ");
112 PortalServer container = portalRequest.getServer();
113
114 for (Iterator i = regions.getRegionNames().iterator(); i.hasNext();)
115 {
116 region = regions.getRegion((String )i.next());
117 if (region != null)
118 {
119 for (Iterator r = region.items(); r.hasNext();)
120 {
121 Item item = (Item)r.next();
122 FragmentResult fragmentResult = item.getFragment();
123 WindowContext windowContext = fragmentResult.getProducer();
124 Window window = (Window)container.getObject(windowContext.getID());
125 ServerObjectID instanceRef = ServerObjectID.createWindowID(window.getPortal().getName(), portletInstanceRef);
126 if (instanceRef.equals(windowContext.getID()))
127 {
128 fragment = fragmentResult;
129 break;
130 }
131 }
132 }
133 }
134
135 if (fragment == null)
136 {
137 out.write("<p bgcolor='red'>Required Portlet is not on this page!</p>");
138 out.write("<p bgcolor='red'>The Portlet " + getInstanceRef() + " is not on the requested page</p>");
139 out.flush();
140 return;
141 }
142
143 MediaType mediaType = getMediaTypeFromResponse(response);
145
146 PortalLayout layout = (PortalLayout)request.getAttribute(LayoutConstants.PARAM_LAYOUT);
147 PortalRenderSet renderSet = layoutServer.getRenderSet(layout, mediaType);
148 String renderSetName = (String )request.getAttribute(LayoutConstants.ATTR_RENDERSET);
149
150 if (renderSet == null && renderSetName != null)
151 {
152 renderSet = layoutServer.getRenderSet(renderSetName, mediaType);
153 }
154
155 if (renderSet == null)
156 {
157 log.error("render set cannot be determined : " + renderSetName);
158 throw new JspException ("render set cannot be determined : " + renderSetName);
159 }
160
161 try
162 {
163 RenderContext renderContext =
164 RendererFactory.getRenderContext(renderSet, mediaType, RegionOrientation.HORIZONTAL, request);
165 renderContext.getWindowRenderer().render(renderContext, fragment);
166 out.write(renderContext.getMarkupFragment().toString());
167 out.flush();
168 }
169 catch (RenderException e)
170 {
171 log.error(e);
172 out.write("<p bgcolor='red'>Error during rendering the Portlet</p>");
173 out.write("<p bgcolor='red'>" + e.getMessage() + "</p>");
174 out.flush();
175 return;
176 }
177 }
178
179 public String getInstanceRef()
180 {
181 return portletInstanceRef;
182 }
183
184 public void setInstanceRef(String portletInstanceRef)
185 {
186 log.info("setting instance ref: " + portletInstanceRef);
187 this.portletInstanceRef = portletInstanceRef;
188 }
189
190 private static MediaType getMediaTypeFromResponse(HttpServletResponse response)
191 {
192 MediaType contentType = MediaType.HTML;
193 if (response.getContentType() != null)
194 {
195 try
196 {
197 contentType = MediaType.parseMimeType(response.getContentType());
198 }
199 catch (MimeTypeParseException e)
200 {
201 log.error(e);
202 }
203 }
204 return contentType;
205 }
206 }
207 |
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