/*
* $Header: /home/cvspublic/jakarta-struts/contrib/struts-faces/src/java/org/apache/struts/faces/renderer/MessageRenderer.java,v 1.1 2003/03/07 03:22:44 craigmcc Exp $
* $Revision: 1.1 $
* $Date: 2003/03/07 03:22:44 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Struts", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
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*
*/
package org.apache.struts.faces.renderer;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import javax.faces.component.UIComponent;
import javax.faces.component.UIParameter;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.Globals;
import org.apache.struts.util.MessageResources;
/**
* <p><code>Renderer</code> implementation for the <code>message</code> tag
* from the <em>Struts-Faces Integration Library</em>.</p>
*
* @author Craig R. McClanahan
* @version $Revision: 1.1 $ $Date: 2003/03/07 03:22:44 $
*/
public class MessageRenderer extends WriteRenderer {
// ------------------------------------------------------- Static Variables
/**
* <p>The <code>Log</code> instance for this class.</p>
*/
private static Log log = LogFactory.getLog(MessageRenderer.class);
// --------------------------------------------------------- Public Methods
// ------------------------------------------------------ Protected Methods
/**
* <p>Return the message format String to be processed for this message.
* </p>
*
* @param context FacesContext for the response we are creating
* @param component Component to be rendered
*
* @exception IllegalArgumentException if no MessageResources bundle
* can be found
* @exception IllegalArgumentException if no message key can be found
*/
protected String getText(FacesContext context, UIComponent component) {
// Look up the MessageResources bundle to be used
String bundle = (String) component.getAttribute("bundle");
if (bundle == null) {
bundle = Globals.MESSAGES_KEY;
}
MessageResources resources = (MessageResources)
context.getServletContext().getAttribute(bundle);
if (resources == null) { // FIXME - i18n
throw new IllegalArgumentException("MessageResources bundle " +
bundle + " not found");
}
// Look up the message key to be used
Object value = component.getAttribute("key");
if (value == null) {
value = component.currentValue(context);
}
if (value == null) { // FIXME - i18n
throw new NullPointerException("Component " +
component.getComponentId() +
" has no current value");
}
String key = value.toString();
// Build the substitution arguments list
ArrayList list = new ArrayList();
Iterator kids = component.getChildren();
while (kids.hasNext()) {
UIComponent kid = (UIComponent) kids.next();
if (!(kid instanceof UIParameter)) {
continue;
}
list.add(kid.currentValue(context));
}
Object args[] = (Object[]) list.toArray(new Object[list.size()]);
// Look up the requested message
return (resources.getMessage(context.getLocale(), key, args));
}
}