Java tutorial
/* * Copyright (c) 2012 - 2015 by Stefan Ferstl <st.ferstl@gmail.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.github.ferstl.maven.pomenforcers.model; import com.google.common.base.Joiner; import com.google.common.collect.Iterables; final class CollectionToStringHelper { private static final Joiner JOINER = Joiner.on(",\n"); public static String toString(String prefix, Iterable<?> iterable) { StringBuilder sb = new StringBuilder(prefix).append(" [\n"); JOINER.appendTo(sb, iterable).append((iterable != null && !Iterables.isEmpty(iterable)) ? "\n]" : "]"); return sb.toString(); } private CollectionToStringHelper() { } }