/**
* GENERATED FILE - DO NOT EDIT
*
* License Agreement.
*
* JBoss RichFaces 3.1 - Ajax4jsf Component Library
*
* Copyright (C) 2007 Exadel, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.richfaces.taglib;
import org.richfaces.event.DropSource;
import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.el.EvaluationException;
import javax.faces.el.ValueBinding;
import javax.faces.webapp.UIComponentTag;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;
import org.apache.commons.beanutils.ConvertUtils;
import org.ajax4jsf.Messages;
public class DropListenerTag extends TagSupport {
private static final long serialVersionUID = -274448680242671987L;
private String type;
private String binding;
// Fields
public int doStartTag() throws JspException {
UIComponentTag parentTag = UIComponentTag
.getParentUIComponentTag(pageContext);
if (parentTag == null) {
throw new JspException(Messages.getMessage(
Messages.NO_UI_COMPONENT_TAG_ANCESTOR_ERROR, this
.getClass().getName()));
}
if (type == null && binding == null) {
throw new JspException("Either of the following attributes is "
+ "required: type binding");
}
// Process only newly created components
if (parentTag.getCreated()) {
FacesContext context = FacesContext.getCurrentInstance();
Application application = context.getApplication();
org.richfaces.event.DropListener listener = null;
UIComponent component = parentTag.getComponentInstance();
// First try to access listener binding
if (binding != null) {
ValueBinding valueBinding = application
.createValueBinding(binding);
try {
listener = (org.richfaces.event.DropListener) valueBinding
.getValue(context);
} catch (EvaluationException e) {
throw new JspException(e);
}
}
// Then try to instantiate it by type attribute
if (listener == null) {
String className = null;
if (UIComponentTag.isValueReference(type)) {
try {
className = (String) application.createValueBinding(
type).getValue(context);
} catch (EvaluationException e) {
throw new JspException(e);
}
} else {
className = type;
}
if (className == null) {
throw new JspException("Type attribute resolved to null.");
}
try {
listener = (org.richfaces.event.DropListener) Class.forName(className)
.newInstance();
} catch (Exception e) {
throw new JspException(Messages.getMessage(
Messages.INSTANTIATE_LISTENER_ERROR, className,
component.getId()), e);
}
}
// If listener was found/created, append it to component
if (listener != null) {
((org.richfaces.event.DropSource) component)
.addDropListener(listener);
}
}
return SKIP_BODY;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getBinding() {
return binding;
}
public void setBinding(String binding) {
this.binding = binding;
}
public void release() {
type = null;
binding = null;
}
}