/*
    * 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 javax.faces.component;
  
  import javax.el.ValueExpression;
  import javax.faces.context.FacesContext;
  
  import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFComponent;
  import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFProperty;
  
  /**
   * Displays a graphical image.
   * <p>
   * See the javadoc for this class in the
   * <a href="http://java.sun.com/j2ee/javaserverfaces/1.2/docs/api/index.html">JSF Specification</a>
   * for further details.
   */
  @JSFComponent(defaultRendererType = "javax.faces.Image")
  public class UIGraphic extends UIComponentBase
  {
      public static final String COMPONENT_TYPE = "javax.faces.Graphic";
      public static final String COMPONENT_FAMILY = "javax.faces.Graphic";
  
      private static final String URL_PROPERTY = "url";
      private static final String VALUE_PROPERTY = "value";
  
      private Object _value;
  
      /**
       * Construct an instance of the UIGraphic.
       */
      public UIGraphic()
      {
          setRendererType("javax.faces.Image");
      }
  
      @Override
      public String getFamily()
      {
          return COMPONENT_FAMILY;
      }
  
      /**
       * An alias for the "value" attribute.
       */
      @JSFProperty
      public String getUrl()
      {
          return (String) getValue();
      }
  
      public void setUrl(String url)
      {
          setValue(url);
      }
  
      @Override
      public ValueExpression getValueExpression(String name)
      {
          if (URL_PROPERTY.equals(name))
          {
              return super.getValueExpression(VALUE_PROPERTY);
          }
          else
          {
              return super.getValueExpression(name);
          }
      }
  
      @Override
      public void setValueExpression(String name, ValueExpression binding)
      {
          if (URL_PROPERTY.equals(name))
          {
              super.setValueExpression(VALUE_PROPERTY, binding);
          }
          else
          {
              super.setValueExpression(name, binding);
          }
      }
  
      /**
      * The URL of the image.
      * <p>
      * If the URL starts with a '/', it is relative to the context path of the web application.
      * </p>
      */
     @JSFProperty
     public Object getValue()
     {
         if (_value != null)
         {
             return _value;
         }
         ValueExpression expression = getValueExpression("value");
         if (expression != null)
         {
             return expression.getValue(getFacesContext().getELContext());
         }
         return null;
     }
 
     public void setValue(Object value)
     {
         this._value = value;
     }
 
     @Override
     public Object saveState(FacesContext facesContext)
     {
         Object[] values = new Object[2];
         values[0] = super.saveState(facesContext);
         values[1] = _value;
 
         return values;
     }
 
     @Override
     public void restoreState(FacesContext facesContext, Object state)
     {
         Object[] values = (Object[]) state;
         super.restoreState(facesContext, values[0]);
         _value = values[1];
     }
 }