/*

  * 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 javax.faces.convert.Converter;

 import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFComponent;

 import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFProperty;

 /**

  * Displays a value to the user.

  */

 @JSFComponent(defaultRendererType = "javax.faces.Text")

 public class UIOutput extends UIComponentBase implements ValueHolder

 {

     public static final String COMPONENT_TYPE = "javax.faces.Output";

     public static final String COMPONENT_FAMILY = "javax.faces.Output";

     private Converter _converter;

     /**

      * Construct an instance of the UIOutput.

      */

     public UIOutput()

     {

         setRendererType("javax.faces.Text");

     }

     @Override

     public String getFamily()

     {

         return COMPONENT_FAMILY;

     }

     public Object getLocalValue()

     {

         return  getStateHelper().get(PropertyKeys.value);

     }

     /**

      * Gets The initial value of this component.

      * 

      * @return the new value value

      */

     @JSFProperty

     public Object getValue()

     {

         return  getStateHelper().eval(PropertyKeys.value);

     }

     /**

      * The initial value of this component.

      */

     public void setValue(Object value)

     {

         getStateHelper().put(PropertyKeys.value, value );

     }

     /**

      * @since 2.2

      */

     public void resetValue()

     {

         setValue(null);

     }

     /**

      * An expression that specifies the Converter for this component.

      * <p>

      * The value can either be a static value (ID) or an EL expression. When a static id is

      * specified, an instance of the converter type registered with that id is used. When this

      * is an EL expression, the result of evaluating the expression must be an object that

      * implements the Converter interface.

      * </p>

      */

     @JSFProperty(partialStateHolder=true)

     public Converter getConverter()

     {

         if (_converter != null)

         {

             return _converter;

         }

         ValueExpression expression = getValueExpression("converter");

         if (expression != null)

         {

             return (Converter) expression.getValue(getFacesContext().getELContext());

         }

         return null;

     }

     public void setConverter(Converter converter)

     {

         this._converter = converter;

         if (initialStateMarked())

         {

             getStateHelper().put(PropertyKeys.converterSet,Boolean.TRUE);

         }

         // The argument converter must be inspected for the presence of the ResourceDependency annotation.

         //_handleAnnotations(FacesContext.getCurrentInstance(), converter);

     }

     private boolean _isSetConverter()

     {

         Boolean value = (Boolean) getStateHelper().get(PropertyKeys.converterSet);

         return value == null ? false : value;

     }

     public void markInitialState()

     {

         super.markInitialState();

         if (_converter != null && 

             _converter instanceof PartialStateHolder)

         {

             ((PartialStateHolder)_converter).markInitialState();

         }

     }

     public void clearInitialState()

     {

         if (initialStateMarked())

         {

             super.clearInitialState();

             if (_converter != null && 

                 _converter instanceof PartialStateHolder)

             {

                 ((PartialStateHolder)_converter).clearInitialState();

             }

         }

     }

     enum PropertyKeys

     {

          value

         , converterSet

     }

     @Override

     public Object saveState(FacesContext facesContext)

     {

         if (initialStateMarked())

         {

             Object parentSaved = super.saveState(facesContext);

             Object converterSaved = null;

             boolean nullDelta = true;

             if (!_isSetConverter() &&

                 _converter != null && 

                 _converter instanceof PartialStateHolder)

             {

                 //Delta

                 StateHolder holder = (StateHolder) _converter;

                 if (!holder.isTransient())

                 {

                     Object attachedState = holder.saveState(facesContext);

                     if (attachedState != null)

                     {

                         nullDelta = false;

                         converterSaved = new _AttachedDeltaWrapper(_converter.getClass(),

                             attachedState);

                     }

                 }

                 else

                 {

                     nullDelta = false;

                     converterSaved = null;

                 }

             }

             else if (_isSetConverter() || _converter != null)

             {

                 // A converter that does not implement StateHolder does not need

                 // to save/restore the state, so we can consider it inmutable.

                 // If Call saveAttachedState(), keep the value, but do not set

                 // nullDelta only if the converter was not set after markInitialState(),

                 // so if the parent returns null, this part will return

                 // null and when is restored, it will return null, but it prevents

                 // add the attached object into the state.

                 if (!_isSetConverter() && _converter != null &&

                     !(_converter instanceof StateHolder))

                 {

                     //No op. Note converterSaved is not taken into account if

                     //nullDelta is true.

                 }

                 else

                 {

                     //Full

                     converterSaved = saveAttachedState(facesContext,_converter);

                     // If _converter == null, setConverter() was called after

                     // markInitialState(), set nullDelta to false and save the

                     // null spot.

                     nullDelta = false;

                 }

             }

             if (parentSaved == null && nullDelta)

             {

                 //No values

                 return null;

             }

             else if (parentSaved != null && nullDelta)

             {

                 return new Object[]{parentSaved};

             }

             return new Object[]{parentSaved, converterSaved};

         }

         else

         {

             Object[] values = new Object[2];

             values[0] = super.saveState(facesContext);

             values[1] = saveAttachedState(facesContext,_converter);

             return values;

         } 

     }

     @Override

     public void restoreState(FacesContext facesContext, Object state)

     {

         if (state == null)

         {

             return;

         }

         Object[] values = (Object[])state;

         super.restoreState(facesContext,values[0]);

         // Have values.length == 1 considers _converter is nullDelta, in that

         // case, there is no need to do any changes, but note this will only work

         // if UIOutput does not have any more StateHolder properties!.

         if (values.length == 2)

         {

             if (values[1] instanceof _AttachedDeltaWrapper)

             {

                 //Delta

                 ((StateHolder)_converter).restoreState(facesContext,

                         ((_AttachedDeltaWrapper) values[1]).getWrappedStateObject());

             }

             else

             {

                 //Full

                 _converter = (javax.faces.convert.Converter) restoreAttachedState(facesContext,values[1]);

             }

         }

     }

     /*

     void _handleAnnotations(FacesContext context, Object inspected)

     {

         if (inspected == null) {

             return;

         }

         ResourceDependency annotation = inspected.getClass().getAnnotation(ResourceDependency.class);

         if (annotation == null)

         {

             // If the ResourceDependency annotation is not present, the argument must be inspected for the presence 

             // of the ResourceDependencies annotation. 

             ResourceDependencies dependencies = inspected.getClass().getAnnotation(ResourceDependencies.class);

             if (dependencies != null)

             {

                 // If the ResourceDependencies annotation is present, the action described in ResourceDependencies 

                 // must be taken.

                 for (ResourceDependency dependency : dependencies.value())

                 {

                     _handleResourceDependency(context, dependency);

                 }

             }

         }

         else

         {

             // If the ResourceDependency annotation is present, the action described in ResourceDependency must be 

             // taken. 

             _handleResourceDependency(context, annotation);

         }

     }

     private void _handleResourceDependency(FacesContext context, ResourceDependency annotation)

     {

         // If this annotation is not present on the class in question, no action must be taken. 

         if (annotation != null)

         {

             Application application = context.getApplication();

             // Create a UIOutput instance by passing javax.faces.Output. to 

             // Application.createComponent(java.lang.String).

             UIOutput output = (UIOutput) application.createComponent(COMPONENT_TYPE);

             // Get the annotation instance from the class and obtain the values of the name, library, and 

             // target attributes.

             String name = annotation.name();

             // Obtain the renderer-type for the resource name by passing name to 

             // ResourceHandler.getRendererTypeForResourceName(java.lang.String).

             String rendererType = application.getResourceHandler().getRendererTypeForResourceName(name);

             // Call setRendererType on the UIOutput instance, passing the renderer-type.

             output.setRendererType(rendererType);

             // Obtain the Map of attributes from the UIOutput component by calling UIComponent.getAttributes().

             Map<String, Object> attributes = output.getAttributes();

             // Store the name into the attributes Map under the key "name".

             attributes.put("name", name);

             // If library is the empty string, let library be null.

             String library = annotation.library();

             if (library != null && library.length() > 0)

             {

                 // If library is non-null, store it under the key "library".

                 attributes.put("library", library);

             }

             // If target is the empty string, let target be null.

             String target = annotation.target();

             if (target != null && target.length() > 0)

             {

                 // If target is non-null, store it under the key "target".

                 attributes.put("target", target);

             }

             else

             {

                 // Otherwise, if target is null, call UIViewRoot.addComponentResource(javax.faces.context.FacesContext, 

                 // javax.faces.component.UIComponent), passing the UIOutput instance as the second argument.

                 context.getViewRoot().addComponentResource(context, output);

             }

         }

     }

     */

 }