001/* -*- mode: Java; c-basic-offset: 2; indent-tabs-mode: nil; coding: utf-8-unix -*-
002 *
003 * Copyright © 2017 MicroBean.
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
014 * implied.  See the License for the specific language governing
015 * permissions and limitations under the License.
016 */
017package org.microbean.configuration.spi.converter;
018
019import java.util.Arrays;
020import java.util.Set;
021
022import java.util.stream.Collectors;
023
024import org.microbean.configuration.spi.Converter;
025
026public final class StringToStringSetConverter extends Converter<Set<String>> {
027
028  private static final long serialVersionUID = 1L;
029  
030  @Override
031  public final Set<String> convert(final String value) {
032    Set<String> returnValue = null;
033    if (value != null) {
034      returnValue = Arrays.stream(value.split(","))
035        .map(String::trim)
036        .filter(s -> !s.isEmpty())
037        .collect(Collectors.toSet());
038    }
039    return returnValue;
040  }
041  
042}