001    package org.apache.myfaces.tobago.example.reference;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one or more
005     * contributor license agreements.  See the NOTICE file distributed with
006     * this work for additional information regarding copyright ownership.
007     * The ASF licenses this file to You under the Apache License, Version 2.0
008     * (the "License"); you may not use this file except in compliance with
009     * the License.  You may obtain a copy of the License at
010     *
011     *      http://www.apache.org/licenses/LICENSE-2.0
012     *
013     * Unless required by applicable law or agreed to in writing, software
014     * distributed under the License is distributed on an "AS IS" BASIS,
015     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016     * See the License for the specific language governing permissions and
017     * limitations under the License.
018     */
019    
020    import org.apache.myfaces.tobago.util.VariableResolverUtil;
021    
022    import javax.servlet.jsp.tagext.TagSupport;
023    import javax.servlet.jsp.JspException;
024    import javax.faces.context.FacesContext;
025    
026    public class DynamicTag extends TagSupport {
027    
028      private String controllerName;
029      private TagSupport tag;
030    
031      public int doStartTag() throws JspException {
032        // fixme: session?
033        Controller controller =
034            (Controller) VariableResolverUtil.resolveVariable(FacesContext.getCurrentInstance(), controllerName);
035    //    Controller controller = (Controller) pageContext.getSession().getAttribute(controllerName);
036        if (controller != null) {
037          tag = controller.createTag();
038          tag.setPageContext(pageContext);
039          tag.setParent(getParent());
040          tag.doStartTag();
041        }
042        return super.doStartTag();
043      }
044    
045      public int doEndTag() throws JspException {
046        if (tag != null) {
047          tag.doEndTag();
048        }
049        return super.doEndTag();
050      }
051    
052      public String getController() {
053        return controllerName;
054      }
055    
056      public void setController(String controller) {
057        this.controllerName = controller;
058      }
059    }