| 1 | /* |
| 2 | * Copyright 2004 The Apache Software Foundation. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.apache.pluto.driver.tags; |
| 17 | |
| 18 | import java.io.IOException; |
| 19 | import java.io.PrintWriter; |
| 20 | |
| 21 | import javax.servlet.jsp.JspException; |
| 22 | import javax.servlet.jsp.tagext.TagSupport; |
| 23 | |
| 24 | /** |
| 25 | * The portlet render tag is used to print portlet rendering result (or error |
| 26 | * details) to the page. |
| 27 | * |
| 28 | * @author <a href="mailto:ddewolf@apache.org">David H. DeWolf</a> |
| 29 | * @version 1.0 |
| 30 | * @since Oct 4, 2004 |
| 31 | */ |
| 32 | public class PortletRenderTag extends TagSupport { |
| 33 | |
| 34 | // TagSupport Impl --------------------------------------------------------- |
| 35 | |
| 36 | /** |
| 37 | * |
| 38 | * @see PortletTag |
| 39 | */ |
| 40 | public int doEndTag() throws JspException { |
| 41 | |
| 42 | // Ensure that the portlet render tag resides within a portlet tag. |
| 43 | PortletTag parentTag = (PortletTag) TagSupport.findAncestorWithClass( |
| 44 | this, PortletTag.class); |
| 45 | if (parentTag == null) { |
| 46 | throw new JspException("Portlet render tag may only reside " |
| 47 | + "within a pluto:portlet tag."); |
| 48 | } |
| 49 | |
| 50 | // If the portlet is rendered successfully, print the rendering result. |
| 51 | if (parentTag.getStatus() == PortletTag.SUCCESS) { |
| 52 | try { |
| 53 | StringBuffer buffer = parentTag.getPortalServletResponse() |
| 54 | .getInternalBuffer().getBuffer(); |
| 55 | pageContext.getOut().print(buffer.toString()); |
| 56 | } catch (IOException ex) { |
| 57 | throw new JspException(ex); |
| 58 | } |
| 59 | } |
| 60 | // Otherwise, print the error stack trace. |
| 61 | else { |
| 62 | try { |
| 63 | pageContext.getOut().print("Error rendering portlet."); |
| 64 | pageContext.getOut().print("<pre>"); |
| 65 | parentTag.getThrowable().printStackTrace( |
| 66 | new PrintWriter(pageContext.getOut())); |
| 67 | pageContext.getOut().print("</pre>"); |
| 68 | } catch (IOException ex) { |
| 69 | throw new JspException(ex); |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | // Return. |
| 74 | return SKIP_BODY; |
| 75 | } |
| 76 | |
| 77 | |
| 78 | } |
| 79 | |