/*
    * 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.kuali.ole.sys.OLEConstants;
  import org.kuali.ole.sys.context.SpringContext;
  import org.kuali.rice.core.api.config.property.ConfigurationService;
  import org.kuali.rice.krad.util.KRADConstants;
  
  /**
   * This renders a label (and not, as I was about to write labels a render).  It's main job
   * is to render header cells on accounting lines.
   */
  public class LabelRenderer implements Renderer {
      private boolean required = false;
      private boolean readOnly = false;
      private String label;
      private String fullClassNameForHelp;
      private String attributeEntryForHelp;
      private String labelFor;
  
      /**
       * Gets the attributeEntryForHelp attribute. 
       * @return Returns the attributeEntryForHelp.
       */
      public String getAttributeEntryForHelp() {
          return attributeEntryForHelp;
      }
  
      /**
       * Sets the attributeEntryForHelp attribute value.
       * @param attributeEntryForHelp The attributeEntryForHelp to set.
       */
      public void setAttributeEntryForHelp(String attributeEntryForHelp) {
          this.attributeEntryForHelp = attributeEntryForHelp;
      }
  
      /**
       * Gets the fullClassNameForHelp attribute. 
       * @return Returns the fullClassNameForHelp.
       */
      public String getFullClassNameForHelp() {
          return fullClassNameForHelp;
      }
  
      /**
       * Sets the fullClassNameForHelp attribute value.
       * @param fullClassNameForHelp The fullClassNameForHelp to set.
       */
      public void setFullClassNameForHelp(String fullClassNameForHelp) {
          this.fullClassNameForHelp = fullClassNameForHelp;
      }
  
      /**
       * Gets the label attribute. 
       * @return Returns the label.
       */
      public String getLabel() {
          return label;
      }
  
      /**
       * Sets the label attribute value.
       * @param label The label to set.
       */
      public void setLabel(String label) {
          this.label = label;
      }
  
      /**
       * Gets the required attribute. 
       * @return Returns the required.
       */
      public boolean isRequired() {
          return required;
      }
  
      /**
      * Sets the required attribute value.
      * @param required The required to set.
      */
     public void setRequired(boolean required) {
         this.required = required;
     }
 
     /**
      * Gets the readOnly attribute. 
      * @return Returns the readOnly.
      */
     public boolean isReadOnly() {
         return readOnly;
     }
 
     /**
      * Sets the readOnly attribute value.
      * @param readOnly The readOnly to set.
      */
     public void setReadOnly(boolean readOnly) {
         this.readOnly = readOnly;
     }
 
     /**
      * Gets the labelFor attribute. 
      * @return Returns the labelFor.
      */
     public String getLabelFor() {
         return labelFor;
     }
 
     /**
      * Sets the labelFor attribute value.
      * @param labelFor The labelFor to set.
      */
     public void setLabelFor(String labelFor) {
         this.labelFor = labelFor;
     }
 
     /**
      * 
      * @see org.kuali.ole.sys.document.web.renderers.Renderer#clear()
      */
     public void clear() {
         readOnly = false;
         required = false;
         label = null;
         fullClassNameForHelp = null;
         attributeEntryForHelp = null;
         labelFor = null;
     }
 
     private static String APPLICATION_URL;
     
     protected String getApplicationURL() {
         if ( APPLICATION_URL == null ) {
             APPLICATION_URL = SpringContext.getBean(ConfigurationService.class).getPropertyValueAsString(KRADConstants.APPLICATION_URL_KEY);
         }
         return APPLICATION_URL;
     }
     
     /**
      * 
      * @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 {
         try {
             JspWriter out = pageContext.getOut();
             if (!StringUtils.isBlank(labelFor)) {
                 out.write("<label for=\""+labelFor+"\">");
             }
             if (required) {
                 out.write(OLEConstants.REQUIRED_FIELD_SYMBOL);
                 out.write("&nbsp;");
             }
             if (!StringUtils.isBlank(fullClassNameForHelp) && !StringUtils.isBlank(attributeEntryForHelp)) {
                 out.write("<a href=\"");
                 out.write(getApplicationURL());
                 out.write("/kr/help.do?methodToCall=getAttributeHelpText&amp;businessObjectClassName=");
                 out.write(fullClassNameForHelp);
                 out.write("&amp;attributeName=");
                 out.write(attributeEntryForHelp);
                 out.write("\" target=\"_blank\">");
             }
             out.write(label);
             if (!StringUtils.isBlank(fullClassNameForHelp) && !StringUtils.isBlank(attributeEntryForHelp)) {
                 out.write("</a>");
             }
             if (!StringUtils.isBlank(labelFor)) {
                 out.write("</label>");
             }
         }
         catch (IOException ioe) {
             throw new JspException("Difficulty rendering label", ioe);
         }
     }
 
 }