/*
    * 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.orchestra.flow.components;
  
  import javax.el.ELContext;
  import javax.faces.webapp.UIComponentELTag;
  import javax.servlet.jsp.JspException;
  import javax.servlet.jsp.PageContext;
  import javax.servlet.jsp.tagext.BodyTag;
  
  /**
   * Tag which creates a FlowCallComponent instance.
   * <p>
   * Note that JSP tag-handlers are invoked on every render of a view. 
   */
  public class FlowCallTag extends UIComponentELTag
  {
      private PageContext pageContext;
  
      private String outcome;
      private String viewId;
      private String service;
  
      @Override
      public void setPageContext(PageContext pageContext)
      {
          super.setPageContext(pageContext);
          this.pageContext = pageContext;
      }
  
      @Override
      public String getComponentType()
      {
          return FlowCallComponent.COMPONENT_TYPE;
      }
  
      @Override
      public String getRendererType()
      {
          return null;
      }
  
      public void setOutcome(String outcome)
      {
          this.outcome = outcome;
      }
  
      public void setViewId(String viewId)
      {
          this.viewId = viewId;
      }
  
      public void setService(String service)
      {
          this.service = service;
      }
  
      @Override
      protected int getDoStartValue()
      throws JspException
      {
          // Note that the .tld file is expected to declare this tag with
          // body-content=tagdependent in order to avoid evaluating EL
          // expressions within the body..
          return BodyTag.EVAL_BODY_BUFFERED;
      }
  
      @Override
      public int doAfterBody() throws JspException
      {
          FlowCallComponent component = (FlowCallComponent) getComponentInstance();
          if (!component.isInitialized())
          {
              ELContext elContext = pageContext.getELContext();
  
              component.setOutcome(outcome);
              component.setViewId(viewId);
              component.setService(service);
  
              String bodyText = bodyContent.getString();
              
              StringBuffer buf = new StringBuffer();
             buf.append("<flowCall>\n");
             buf.append(bodyText);
             buf.append("</flowCall>");
             String xml = buf.toString();
             component.setBody(elContext, xml);
         }
 
         return 0;
     }
 }