com.helger.commons.name.IDisplayNameProvider Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ph-commons Show documentation

Java 1.8+ Library with tons of utility classes required in all projects

There is a newer version: 11.1.10

/*
 * Copyright (C) 2014-2022 Philip Helger (www.helger.com)
 * philip[at]helger[dot]com
 *
 * Licensed 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 com.helger.commons.name;

import java.util.Comparator;
import java.util.Locale;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import com.helger.commons.compare.IComparator;

/**
 * Interface for a handler the provides the locale independent name of an
 * object.
 *
 * @author Philip Helger
 * @param 
 *        The data type to retrieve the display name from
 */
@FunctionalInterface
public interface IDisplayNameProvider 
{
  /**
   * Get the name of the passed object.
   *
   * @param aObject
   *        The object who's name is to be retrieved.
   * @return The name of the object. May be null.
   */
  @Nullable
  String getDisplayName (@Nullable DATATYPE aObject);

  @Nonnull
  default Comparator  getComparatorCollating (@Nullable final Locale aSortLocale)
  {
    return IComparator.getComparatorCollating (this::getDisplayName, aSortLocale);
  }

  @Nonnull
  static IDisplayNameProvider  createHasDisplayName ()
  {
    return aObject -> aObject == null ? null : aObject.getDisplayName ();
  }
}