/* * 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.commons.lang3.stream; import java.util.Collections; import java.util.Objects; import java.util.Set; import java.util.StringJoiner; import java.util.function.BiConsumer; import java.util.function.BinaryOperator; import java.util.function.Function; import java.util.function.Supplier; import java.util.stream.Collector; import java.util.stream.Collectors; import org.apache.commons.lang3.StringUtils; /** * Implementations of {@link Collector} that implement various useful reduction operations. *
* This class is called {@code LangCollectors} instead of {@code Collectors} to avoid clashes with {@link Collectors}. *
* * @since 3.13.0 */ public final class LangCollectors { /** * Simple implementation class for {@code Collector}. * * @param* This is a variation of {@link Collectors#joining()} that works with any element class, not just {@code CharSequence}. *
* * @return A {@code Collector} which concatenates Object elements, separated by the specified delimiter, in encounter * order. */ public static Collector