PrettyTagBase.java

/*
 * Copyright 2010 Lincoln Baxter, III
 * 
 * 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.ocpsoft.pretty.faces.component;

import javax.el.ExpressionFactory;
import javax.el.ValueExpression;
import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.webapp.UIComponentELTag;

import com.ocpsoft.pretty.faces.el.Expressions;

/**
 * @author Lincoln Baxter, III <lincoln@ocpsoft.com>
 */
abstract public class PrettyTagBase extends UIComponentELTag
{
   protected void setAttributeProperites(final UIComponent component, final String attributeName, final String attribute)
   {
      if (attribute != null)
      {
         if (Expressions.isEL(attribute))
         {
            FacesContext context = FacesContext.getCurrentInstance();
            Application app = context.getApplication();

            ExpressionFactory expressionFactory = app.getExpressionFactory();
            ValueExpression ve = expressionFactory.createValueExpression(attribute, Object.class);
            component.setValueExpression(attributeName, ve);
         }
         else
         {
            component.getAttributes().put(attributeName, attribute);
         }
      }
   }
}