/*

  * 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.view.facelets.compiler;

 import java.io.IOException;

 import java.util.ArrayList;

 import java.util.List;

 import javax.el.ELException;

 import javax.faces.FacesException;

 import javax.faces.component.UIComponent;

 import javax.faces.view.facelets.FaceletContext;

 import javax.faces.view.facelets.FaceletException;

 import javax.faces.view.facelets.FaceletHandler;

 /**

  * 

  * @author Jacob Hookom

  * @version $Id$

  */

 class CompilationUnit

 {

     protected final static FaceletHandler LEAF = new FaceletHandler()

     {

         public void apply(FaceletContext ctx, UIComponent parent) throws IOException, FacesException, FaceletException,

                 ELException

         {

         }

         public String toString()

         {

             return "FaceletHandler Tail";

         }

     };

     private List<CompilationUnit> children;

     public CompilationUnit()

     {

     }

     public void addChild(CompilationUnit unit)

     {

         if (this.children == null)

         {

             this.children = new ArrayList<CompilationUnit>();

         }

         this.children.add(unit);

     }

     public FaceletHandler createFaceletHandler()

     {

         return this.getNextFaceletHandler();

     }

     protected final FaceletHandler getNextFaceletHandler()

     {

         if (this.children == null || this.children.size() == 0)

         {

             return LEAF;

         }

         if (this.children.size() == 1)

         {

             CompilationUnit u = (CompilationUnit) this.children.get(0);

             return u.createFaceletHandler();

         }

         FaceletHandler[] fh = new FaceletHandler[this.children.size()];

         for (int i = 0; i < fh.length; i++)

         {

             fh[i] = ((CompilationUnit) this.children.get(i)).createFaceletHandler();

         }

         return new javax.faces.view.facelets.CompositeFaceletHandler(fh);

     }

 }