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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.visit;

import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.Set;

import javax.faces.component.visit.VisitCallback;
import javax.faces.component.visit.VisitContext;
import javax.faces.component.visit.VisitHint;
import javax.faces.context.FacesContext;

import org.apache.myfaces.trinidad.component.UIXComponent;
import org.apache.myfaces.trinidad.context.RequestContext;


/**
 * Utility methods to make usage of the visit tree functionality more user friendly.
 */
public final class VisitTreeUtils
{
  /**
   * Set of {@link VisitHint#SKIP_UNRENDERED} and {@link VisitHint#SKIP_TRANSIENT} provided
   * for convenience as it is a common use case.
   */
  public static final Set NON_TRANSIENT_RENDERED_HINTS =
    EnumSet.of(VisitHint.SKIP_UNRENDERED, VisitHint.SKIP_TRANSIENT);

  private VisitTreeUtils() {}

  /**
   * Creates a VisitContext instance for use with
   * {@link javax.faces.component.UIComponent#visitTree}.
   *
   * @param context the FacesContext for the current request
   * @param ids the client ids of the components to visit.  If null,
   *   all components will be visited.
   * @param hints the VisitHints to apply to the visit
   * @return a VisitContext instance that is initialized with the
   *   specified ids and hints.
   * @deprecated Method is no longer needed and duplicates the functionality provided by
   *   {@link VisitContext#createVisitContext(FacesContext, Collection, Set)}
   */
  @Deprecated
  public static VisitContext createVisitContext(
    FacesContext context,
    Collection ids,
    Set hints)
  {
    return VisitContext.createVisitContext(context, ids, hints);
  }

  /**
   * Visit a single component in the component tree starting from the view root.
   * Method assumes the {@link RequestContext} is available and a view root must be set on the faces context.
   *
   * @param facesContext the faces context
   * @param clientId the client ID of the component to visit
   * @param visitCallback the callback to be invoked if the component is found
   * @return true if a component was visited
   */
  public static boolean visitSingleComponent(
    FacesContext  facesContext,
    String        clientId,
    VisitCallback visitCallback)
  {
    VisitContext visitContext = VisitContext.createVisitContext(facesContext,
                                  Collections.singleton(clientId), null);
    return UIXComponent.visitTree(visitContext, facesContext.getViewRoot(), visitCallback);
  }
}