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Facelets is an open source alternative view handler technology for JavaServer Faces (JSF).

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/**
 * Licensed under the Common Development and Distribution License,
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.sun.com/cddl/
 *   
 * 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.sun.facelets.util;

import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.component.UIComponentBase;

public final class FacesAPI {

    private static final int version = specifyVersion();
    private static final Class[] UIC_SIG = new Class[] { String.class };
    
    private FacesAPI() {
        super();
    }
    
    private final static int specifyVersion() {
        try {
            Application.class.getMethod("getExpressionFactory", null);
        } catch (NoSuchMethodException e) {
            return 11;
        }
        return 12;
    }
    
    public final static int getVersion() {
        return version;
    }
    
    public final static int getComponentVersion(UIComponent c) {
        return version;
    }
    
    public final static int getComponentVersion(Class c) {
        return version;
    }
}