org.apache.myfaces.trinidad.component.UIXSelectMany Maven / Gradle / Ivy

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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.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import javax.faces.context.FacesContext;
import org.apache.myfaces.trinidad.bean.FacesBean;
import org.apache.myfaces.trinidad.logging.TrinidadLogger;

/**
 *
 * UIXSelectMany is a base abstraction for 
 *           components that allow selection of multiple of a
 *     series of selectItem controls, where order
 *           is not relevant.
 *           selectOne controls may contain any number of
 *           <f:selectItem>, <f:selectItems>, or
 *     <tr:selectItem> components.
 *
 * Events:
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * 
 * Type Phases Description
javax.faces.event.ValueChangeEvent Process
Validations
Apply
Request
Values The valueChange event is delivered when the value
                       attribute is changed.
org.apache.myfaces.trinidad.event.AttributeChangeEvent Invoke
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 UIXSelectMany extends UIXEditableValue
{
  static public final FacesBean.Type TYPE = new FacesBean.Type(
    UIXEditableValue.TYPE);

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

  /**
   * Construct an instance of the UIXSelectMany.
   */
  public UIXSelectMany()
  {
    super("org.apache.myfaces.trinidad.Listbox");
  }
  

  static public final String REQUIRED_MESSAGE_ID =
    "org.apache.myfaces.trinidad.UIXSelectMany.REQUIRED";
  static public final String UNSUPPORTED_MODEL_TYPE_MESSAGE_ID =
    "org.apache.myfaces.trinidad.UIXSelectMany.UNSUPPORTED_MODEL_TYPE";


  /**
   * Compares two values, disregarding the order of the elements.
   */
  // TODO walk through UIXSelectItem values to determine that new
  //       values are permitted
  @Override
  protected void validateValue(FacesContext context, Object newValue)
  {
    super.validateValue(context, newValue);
  }

  @Override
  protected boolean isEmpty(Object value)
  {
    if (value == null)
      return true;

    if (value instanceof Collection)
      return ((Collection) value).isEmpty();

    if (value.getClass().isArray())
      return Array.getLength(value) == 0;

    return false;
  }

  @Override
  protected String getRequiredMessageKey()
  {
    return REQUIRED_MESSAGE_ID;
  }

  /**
   * @return true if the values are different
   */
  // TODO improve efficiency
  @Override
  protected boolean compareValues(Object previous, Object value)
  {
    int prevSize = __getSize(previous);
    int newSize = __getSize(value);

    // If the sizes are different, no need to bother with further work
    if (prevSize != newSize)
      return true;

    // If the sizes are the same, and they're empty, we're also done.
    if (prevSize == 0)
      return false;

    List

Type	Phases	Description
`javax.faces.event.ValueChangeEvent`	Process Validations Apply Request Values	The valueChange event is delivered when the value attribute is changed.
`org.apache.myfaces.trinidad.event.AttributeChangeEvent`	Invoke 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.