/* | |
* Copyright 2004 The Apache Software Foundation. | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
package org.apache.pluto.driver.tags; | |
import java.io.IOException; | |
import javax.servlet.jsp.JspException; | |
import javax.servlet.jsp.tagext.TagSupport; | |
import org.apache.pluto.driver.AttributeKeys; | |
/** | |
* The portlet title tag is used to print the dynamic portlet title to the page. | |
* @author <a href="mailto:ddewolf@apache.org">David H. DeWolf</a> | |
* @author <a href="mailto:zheng@apache.org">ZHENG Zhong</a> | |
* @version 1.0 | |
* @since Oct 4, 2004 | |
*/ | |
public class PortletTitleTag extends TagSupport { | |
// TagSupport Impl --------------------------------------------------------- | |
/** | |
* Method invoked when the start tag is encountered. This method retrieves | |
* the portlet title and print it to the page. | |
* | |
* @see org.apache.pluto.services.PortalCallbackService#setTitle(HttpServletRequest, PortletWindow, String) | |
* @see org.apache.pluto.driver.services.container.PortalCallbackServiceImpl#setTitle(HttpServletRequest, PortletWindow, String) | |
* | |
* @throws JspException | |
*/ | |
public int doStartTag() throws JspException { | |
// Ensure that the portlet title tag resides within a portlet tag. | |
PortletTag parentTag = (PortletTag) TagSupport.findAncestorWithClass( | |
this, PortletTag.class); | |
if (parentTag == null) { | |
throw new JspException("Portlet title tag may only reside " | |
+ "within a pluto:portlet tag."); | |
} | |
// Print out the portlet title to page. | |
try { | |
pageContext.getOut().print(pageContext.getRequest().getAttribute( | |
AttributeKeys.PORTLET_TITLE)); | |
} catch (IOException ex) { | |
throw new JspException(ex); | |
} | |
return SKIP_BODY; | |
} | |
} | |