/**
    * Copyright 2005-2011 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.rice.krad.uif.field;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.krad.uif.UifConstants.Position;
  import org.kuali.rice.krad.uif.component.Component;
  import org.kuali.rice.krad.uif.view.View;
  
  import java.util.List;
  
  /**
   * Contains a label for another <code>Field</code> instance
   *
   * <p>
   * The <code>LabelField</code> exists so that the label can be placed separate
   * from the component in a layout manager such as the
   * <code>GridLayoutManager</code>. It addition it can be used to style the label
   * (from the inherited styleClass and style properties)
   * </p>
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class LabelField extends FieldBase {
      private static final long serialVersionUID = -6491546893195180114L;
  
      private String labelText;
      private String labelForComponentId;
  
      private boolean renderColon;
  
      private Position requiredMessagePlacement;
      private MessageField requiredMessageField;
  
      public LabelField() {
          renderColon = true;
  
          requiredMessagePlacement = Position.LEFT;
      }
  
      /**
  	 * The following finalization is performed:
  	 *
  	 * <ul>
  	 * <li>If label text is blank, set render to false for field</li>
  	 *
  	 * @see org.kuali.rice.krad.uif.component.ComponentBase#performFinalize(org.kuali.rice.krad.uif.view.View,
  	 *      java.lang.Object, org.kuali.rice.krad.uif.component.Component)
  	 */
      @Override
      public void performFinalize(View view, Object model, Component parent) {
          super.performFinalize(view, model, parent);
  
          if (StringUtils.isBlank(getLabelText())) {
              setRender(false);
          }
      }
  
      /**
       * @see org.kuali.rice.krad.uif.component.ComponentBase#getComponentsForLifecycle()
       */
      @Override
      public List<Component> getComponentsForLifecycle() {
          List<Component> components = super.getComponentsForLifecycle();
  
          components.add(requiredMessageField);
  
          return components;
      }
  
      /**
       * Indicates the id for the component the label applies to
       * <p>
       * Used for setting the labelFor attribute of the corresponding HTML
       * element. Note this gets set automatically by the framework during the
       * initialize phase
       * </p>
       * 
       * @return String component id
       */
      public String getLabelForComponentId() {
          return this.labelForComponentId;
      }
  
      /**
       * Setter for the component id the label applies to
      * 
      * @param labelForComponentId
      */
     public void setLabelForComponentId(String labelForComponentId) {
         this.labelForComponentId = labelForComponentId;
     }
 
     /**
      * Text that will display as the label
      * 
      * @return String label text
      */
     public String getLabelText() {
         return this.labelText;
     }
 
     /**
      * Setter for the label text
      * 
      * @param labelText
      */
     public void setLabelText(String labelText) {
         this.labelText = labelText;
     }
 
     /**
      * Indicates whether a colon should be rendered after the label text,
      * generally used when the label appears to the left of the field's control
      * or value
      * 
      * @return boolean true if a colon should be rendered, false if it should
      *         not be
      */
     public boolean isRenderColon() {
         return this.renderColon;
     }
 
     /**
      * Setter for the render colon indicator
      * 
      * @param renderColon
      */
     public void setRenderColon(boolean renderColon) {
         this.renderColon = renderColon;
     }
 
     /**
      * <code>MessageField</code> instance that will display a required indicator
      * 
      * <p>
      * To indicate a field must have a value (required input) the required
      * message field can be set to display an indicator or message along with
      * the label. The message field also dictates the styling of the required
      * message
      * </p>
      * 
      * @return MessageField instance
      */
     public MessageField getRequiredMessageField() {
         return this.requiredMessageField;
     }
 
     /**
      * Setter for the required message field
      * 
      * @param requiredMessageField
      */
     public void setRequiredMessageField(MessageField requiredMessageField) {
         this.requiredMessageField = requiredMessageField;
     }
 
     /**
      * Indicates where the required message field should be placed in relation
      * to the label field, valid options are 'LEFT' and 'RIGHT'
      * 
      * @return Position the requiredMessage placement
      */
     public Position getRequiredMessagePlacement() {
         return this.requiredMessagePlacement;
     }
 
     /**
      * Setter for the required message field placement
      * 
      * @param requiredMessagePlacement
      */
     public void setRequiredMessagePlacement(Position requiredMessagePlacement) {
         this.requiredMessagePlacement = requiredMessagePlacement;
     }
 
 }