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; 020 021import org.microbean.configuration.spi.Converter; 022 023public final class StringToIntegerArrayConverter extends Converter<Integer[]> { 024 025 private static final long serialVersionUID = 1L; 026 027 private static final Integer[] EMPTY_INTEGER_ARRAY = new Integer[0]; 028 029 private static final StringToIntegerConverter scalarConverter = new StringToIntegerConverter(); 030 031 @Override 032 public final Integer[] convert(final String value) { 033 Integer[] returnValue = null; 034 if (value != null) { 035 if (value.isEmpty()) { 036 returnValue = EMPTY_INTEGER_ARRAY; 037 } else { 038 returnValue = Arrays.stream(value.split(",")) 039 .map(String::trim) 040 .filter(s -> !s.isEmpty()) 041 .map(scalarConverter::convert) 042 .toArray(Integer[]::new); 043 } 044 } 045 return returnValue; 046 } 047 048}