/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.myfaces.trinidad.webapp;
import javax.faces.component.EditableValueHolder;
import javax.faces.component.UIComponent;
import javax.faces.validator.Validator;
import javax.faces.webapp.UIComponentClassicTagBase;
import javax.faces.webapp.UIComponentELTag;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.Tag;
/**
* This is the Trinidad version of the JSF <code>ValidatorELTag</code> class.
* The main difference is that this class is <b>NOT</b> inheriting from
* the standard <code>TagSupport</code> and therefore does not
* implement <code>Serializable</code> interface.
*
* @author Apache MyFaces team
*/
public abstract class TrinidadValidatorELTag extends TrinidadTagSupport
{
@Override
public int doStartTag() throws JspException
{
UIComponentClassicTagBase componentTag = UIComponentELTag.getParentUIComponentClassicTagBase(pageContext);
if (componentTag == null)
{
throw new JspException("no parent UIComponentTag found");
}
if (!componentTag.getCreated())
{
return Tag.SKIP_BODY;
}
Validator validator = createValidator();
UIComponent component = componentTag.getComponentInstance();
if (component == null)
{
throw new JspException("parent UIComponentTag has no UIComponent");
}
if (!(component instanceof EditableValueHolder))
{
throw new JspException("UIComponent is no EditableValueHolder");
}
((EditableValueHolder)component).addValidator(validator);
return Tag.SKIP_BODY;
}
protected abstract Validator createValidator() throws JspException;
}