com.icesoft.faces.component.paneltabset.TabChangeListenerTag Maven / Gradle / Ivy
/*
* Copyright 2004-2013 ICEsoft Technologies Canada Corp.
*
* 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 com.icesoft.faces.component.paneltabset;
import com.icesoft.faces.component.util.CustomComponentUtils;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;
import javax.faces.webapp.UIComponentTag;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.Tag;
import javax.servlet.jsp.tagext.TagSupport;
/**
* Tag to add tab change listeners to a com.icesoft.faces.component.paneltabset.PanelTabSet
*/
public class TabChangeListenerTag extends TagSupport {
/**
* The serialVersionUID unique identifier.
*/
private static final long serialVersionUID = -6903749011638483023L;
/**
* The current type.
*/
private String type = null;
/**
* Creates an instance.
*/
public TabChangeListenerTag() {
}
/**
* Sets the type.
*
* @param type
*/
public void setType(String type) {
this.type = type;
}
/**
* @return Tag.SKIP_BODY
* @throws JspException
*/
public int doStartTag() throws JspException {
if (type == null) {
throw new JspException("type attribute not set");
}
//Find parent UIComponentTag
UIComponentTag componentTag =
UIComponentTag.getParentUIComponentTag(pageContext);
if (componentTag == null) {
throw new JspException(
"TabChangeListenerTag has no UIComponentTag ancestor");
}
if (componentTag.getCreated()) {
//Component was just created, so we add the Listener
UIComponent component = componentTag.getComponentInstance();
if (component instanceof PanelTabSet) {
String className;
if (UIComponentTag.isValueReference(type)) {
FacesContext facesContext =
FacesContext.getCurrentInstance();
ValueBinding valueBinding = facesContext.getApplication()
.createValueBinding(type);
className = (String) valueBinding.getValue(facesContext);
} else {
className = type;
}
TabChangeListener listener =
(TabChangeListener) CustomComponentUtils
.newInstance(className);
((PanelTabSet) component).addTabChangeListener(listener);
} else {
throw new JspException("Component " + component.getId() +
" is no PanelTabSet");
}
}
return Tag.SKIP_BODY;
}
}