/*
    * Copyright 2008 The Kuali Foundation
    * 
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    * 
   * 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.kuali.ole.sys.document.web.renderers;
  
  import java.io.IOException;
  
  import javax.servlet.jsp.JspException;
  import javax.servlet.jsp.JspWriter;
  import javax.servlet.jsp.PageContext;
  import javax.servlet.jsp.tagext.Tag;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.struts.taglib.html.HiddenTag;
  import org.springframework.web.util.HtmlUtils;
  
  /**
   * Renders the dynamic label portion of a field
   */
  public class DynamicNameLabelRenderer implements Renderer {
      private String fieldName = null;
      private String fieldValue = null;
      private HiddenTag valuePersistingTag = new HiddenTag();
      
      /**
       * @see org.kuali.ole.sys.document.web.renderers.Renderer#clear()
       */
      public void clear() {
          fieldName = null;
          fieldValue = null;
          
          valuePersistingTag.setPageContext(null);
          valuePersistingTag.setParent(null);
          valuePersistingTag.setProperty(null);
          valuePersistingTag.setValue(null);
      }
  
      /**
       * 
       * @see org.kuali.ole.sys.document.web.renderers.Renderer#render(javax.servlet.jsp.PageContext, javax.servlet.jsp.tagext.Tag, org.kuali.rice.krad.bo.BusinessObject)
       */
      public void render(PageContext pageContext, Tag parentTag) throws JspException {
          JspWriter out = pageContext.getOut();
          try {
              out.write("<br />");
              out.write("<div id=\""+fieldName+".div\" class=\"fineprint\">");
              if (!StringUtils.isBlank(fieldValue)) {
                  out.write(fieldValue);
              }
              out.write("</div>");
              
              if (!StringUtils.isBlank(fieldValue)) {
                  renderValuePersistingTag(pageContext, parentTag);
              }
          }
          catch (IOException ioe) {
              throw new JspException("Difficulty rendering a dynamic field label", ioe);
          }
      }
      
      /**
       * If the value is present, renders that value in a tag
       * @param pageContext the page context to render to
       * @param parentTag the tag requesting all this rendering
       */
      protected void renderValuePersistingTag(PageContext pageContext, Tag parentTag) throws JspException {
          valuePersistingTag.setPageContext(pageContext);
          valuePersistingTag.setParent(parentTag);
          valuePersistingTag.setProperty(fieldName);
          valuePersistingTag.setValue(fieldValue);
          
          valuePersistingTag.doStartTag();
          valuePersistingTag.doEndTag();
      }
  
      /**
       * Gets the fieldName attribute. 
       * @return Returns the fieldName.
       */
      public String getFieldName() {
          return fieldName;
      }
  
      /**
       * Sets the fieldName attribute value.
       * @param fieldName The fieldName to set.
       */
     public void setFieldName(String fieldName) {
         this.fieldName = fieldName;
     }
 
     /**
      * Gets the fieldValue attribute. 
      * @return Returns the fieldValue.
      */
     public String getFieldValue() {
         return fieldValue;
     }
 
     /**
      * Sets the fieldValue attribute value.
      * @param fieldValue The fieldValue to set.
      */
     public void setFieldValue(String fieldValue) {
         this.fieldValue = fieldValue;
     }
 }