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/*
 * 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 org.apache.myfaces.trinidad.component;

import java.util.ArrayList;
import java.util.List;
import javax.faces.component.NamingContainer;
import javax.faces.component.UIComponent;
import javax.faces.component.visit.VisitCallback;
import javax.faces.component.visit.VisitContext;
import javax.faces.context.FacesContext;
import javax.faces.event.PhaseId;
import org.apache.myfaces.trinidad.bean.FacesBean;
import org.apache.myfaces.trinidad.bean.PropertyKey;
import org.apache.myfaces.trinidad.util.ComponentUtils;

/**
 *
 * A navigationPath component is used in hierarchical
 *           site layouts to indicate the path back to the root page of the
 *           hierarchy with links.
 *
 * 
Events:

 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
TypePhasesDescription
org.apache.myfaces.trinidad.event.AttributeChangeEventInvoke
Application
Apply
Request
Values		Event delivered to describe an attribute change.  Attribute change events are not delivered for any programmatic change to a property.  They are only delivered when a renderer changes a property without the application's specific request.  An example of an attribute change event might include the width of a column that supported client-side resizing.

 */
public class UIXNavigationPath extends UIXNavigationHierarchy
                               implements NamingContainer
{
  static public final FacesBean.Type TYPE = new FacesBean.Type(
    UIXNavigationHierarchy.TYPE);
  static public final PropertyKey VALUE_KEY =
    TYPE.registerKey("value", Object.class, null, 0, PropertyKey.Mutable.SOMETIMES);
  static public final PropertyKey VAR_STATUS_KEY =
    TYPE.registerKey("varStatus", String.class, PropertyKey.CAP_NOT_BOUND);
  static public final String NODE_STAMP_FACET = "nodeStamp";

  static public final String COMPONENT_FAMILY =
    "org.apache.myfaces.trinidad.NavigationPath";
  static public final String COMPONENT_TYPE =
    "org.apache.myfaces.trinidad.NavigationPath";

  /**
   * Construct an instance of the UIXNavigationPath.
   */
  public UIXNavigationPath()
  {
    super("org.apache.myfaces.trinidad.Path");
  }
    
  @Override
  protected void processFacetsAndChildren(
    FacesContext context,
    PhaseId phaseId)
  {
    Object oldPath = getRowKey();
    
    Object focusPath = getFocusRowKey();
    
    if (focusPath != null )
    {
      List paths = 
        new ArrayList(getAllAncestorContainerRowKeys(focusPath));
      
      paths.add(focusPath);
      int focusPathSize = paths.size();
      UIComponent nodeStamp = getFacet("nodeStamp");
      
      if (nodeStamp != null)
      {
        for (int i = 0; i < focusPathSize; i++)
        {
          setRowKey(paths.get(i));
          processComponent(context, nodeStamp, phaseId);
        }
      }
    }
    
    setRowKey(oldPath);
    
    // process the children
    TableUtils.__processChildren(context, this, phaseId);
  }  

  @Override
  protected boolean visitChildren(
    VisitContext  visitContext,
    VisitCallback callback)
  {
    if (ComponentUtils.isSkipIterationVisit(visitContext))
    {
      return visitChildrenWithoutIterating(visitContext, callback);
    }
    else
    {
      return _visitChildrenIterating(visitContext, callback);
    }
  }

  private boolean _visitChildrenIterating(
    VisitContext  visitContext,
    VisitCallback callback)
  {
    boolean done = visitData(visitContext, callback);
    
    if (!done)
    {
      // process the children
      int childCount = getChildCount();
      if (childCount > 0)
      {
        for (UIComponent child : getChildren())
        {
          done = UIXComponent.visitTree(visitContext, child, callback);
          
          if (done)
            break;
        }
      }          
    }
    
    return done;
  }
  
  @Override
  protected boolean visitData(
    VisitContext  visitContext,
    VisitCallback callback)
  {
    Object focusPath = getFocusRowKey();
    Object oldRowKey = null;
    
    boolean done = false;
    
    // start from the focused area
    if (focusPath != null)
    {
      List stamps = getStamps();
      
      if (!stamps.isEmpty())
      {
        List paths =  new ArrayList(getAllAncestorContainerRowKeys(focusPath));
        paths.add(focusPath);
        
        int focusPathSize = paths.size();
        
        try
        {
          for (int i = 0; i < focusPathSize && !done; i++)
          {
            setRowKey(paths.get(i));
            
            for (UIComponent stamp : stamps)
            {
              done = UIXComponent.visitTree(visitContext, stamp, callback);
              
              if (done)
                break;
            }
          }
        }
        finally
        {
          setRowKey(oldRowKey);
        }
      }
    }
    
    return done;
  } 

  /**
   * the component to use to stamp each element in the
   *               navigation. A CommandNavigationItem is expected.
   */
  final public UIComponent getNodeStamp()
  {
    return getFacet(NODE_STAMP_FACET);
  }

  /**
   * the component to use to stamp each element in the
   *               navigation. A CommandNavigationItem is expected.
   */
  @SuppressWarnings("unchecked")
  final public void setNodeStamp(UIComponent nodeStampFacet)
  {
    getFacets().put(NODE_STAMP_FACET, nodeStampFacet);
  }

  /**
   * Gets the hierarchy of navigation data - must be of type 
   *             org.apache.myfaces.trinidad.model.MenuModel
   *
   * @return  the new value value
   */
  final public Object getValue()
  {
    return getProperty(VALUE_KEY);
  }

  /**
   * Sets the hierarchy of navigation data - must be of type 
   *             org.apache.myfaces.trinidad.model.MenuModel
   * 
   * @param value  the new value value
   */
  final public void setValue(Object value)
  {
    setProperty(VALUE_KEY, (value));
  }

  /**
   * Gets 
   *  Name of the EL variable used to reference the varStatus information.
   *           Once this component has completed rendering, this variable is
   *           removed (or reverted back to its previous value).
   *           The VarStatus provides contextual information about the state of the
   *           component to EL expressions. For components that iterate, varStatus
   *           also provides loop counter information.  Please see the this 
   *           component's documentation for the specific properties on the varStatus.
   *           The common properties on varStatus include:
  • "model" - returns the CollectionModel for this component
  • "index" - returns the zero based row index

   *
   * @return  the new varStatus value
   */
  final public String getVarStatus()
  {
    return ComponentUtils.resolveString(getProperty(VAR_STATUS_KEY));
  }

  /**
   * Sets 
   *  Name of the EL variable used to reference the varStatus information.
   *           Once this component has completed rendering, this variable is
   *           removed (or reverted back to its previous value).
   *           The VarStatus provides contextual information about the state of the
   *           component to EL expressions. For components that iterate, varStatus
   *           also provides loop counter information.  Please see the this 
   *           component's documentation for the specific properties on the varStatus.
   *           The common properties on varStatus include:
  • "model" - returns the CollectionModel for this component
  • "index" - returns the zero based row index

   * 
   * @param varStatus  the new varStatus value
   */
  final public void setVarStatus(String varStatus)
  {
    setProperty(VAR_STATUS_KEY, (varStatus));
  }

  @Override
  public String getFamily()
  {
    return COMPONENT_FAMILY;
  }

  @Override
  protected FacesBean.Type getBeanType()
  {
    return TYPE;
  }

  /**
   * Construct an instance of the UIXNavigationPath.
   */
  protected UIXNavigationPath(
    String rendererType
    )
  {
    super(rendererType);
  }

  static
  {
    TYPE.lockAndRegister("org.apache.myfaces.trinidad.NavigationPath","org.apache.myfaces.trinidad.Path");
  }
}
 















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