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.Collection; 021 022import java.util.stream.Collectors; 023 024import org.microbean.configuration.spi.Converter; 025 026public final class StringToStringCollectionConverter extends Converter<Collection<String>> { 027 028 private static final long serialVersionUID = 1L; 029 030 @Override 031 public final Collection<String> convert(final String value) { 032 Collection<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.toList()); 038 } 039 return returnValue; 040 } 041 042}